Manual de serviços

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PIONEER CORPORATION 4-1, Meguro 1-chome,
PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Lon
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 912
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 
 PIONEER CORPORATION 2005
 
DEH-1850/XN/ES
 Meguro-ku, Tokyo 153-8654, Japan
g Beach, CA 90801-1760, U.S.A.
0 Melsele, Belgium
Alexandra Road, #04-01, Singapore 159936
ORDER NO.
CRT3552
HIGH POWER CD PLAYER WITH FM/AM TUNER
DEH-1850/XN/ES
This service manual should be used together with the following manual(s):
Model No. Order No. Mech. Module Remarks
CX-3166 CRT3582 S10.5STD CD Mech. Module : Circuit Descriptions, Mech. Descriptions, Disassembly
For details, refer to "Important Check Points for Good Servicing". 
K-ZZA. NOV. 2005 Printed in Japan
 
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SAFETY INFORMATION
This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.
Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely
repair complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.
If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so
and refer the repair to a qualified service technician.
- Service Precaution
1. You should conform to the regulations governing the product (safety, radio and noise, and other 
 regulations), and should keep the safety during servicing by following the safety instructions 
 described in this manual.
2. Before disassembling the unit, be sure to turn off the power. Unplugging and plugging the connectors 
 during power-on mode may damage the ICs inside the unit.
3. To protect the pickup unit from electrostatic discharge during servicing, take an appropriate treatment 
 (shorting-solder) by referring to "the DISASSEMBLY".
4. After replacing the pickup unit, be sure to check the grating.
DEH-1850/XN/ES2
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[Important Check Points for Good Servicing]
In this manual, procedures that must be performed during repairs are marked with the below symbol.
Please be sure to confirm and follow these procedures.
1. Product safety
Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by 
following the safety instructions described in this manual.
1 Use specified parts for repair.
Use genuine parts. Be sure to use important parts for safety.
2 Do not perform modifications without proper instructions.
Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as 
radio/TV interference and foreign noise.
3 Make sure the soldering of repaired locations is properly performed.
When you solder while repairing, please be sure that there are no cold solder and other debris.
Soldering should be finished with the proper quantity. (Refer to the example)
4 Make sure the screws are tightly fastened.
Please be sure that all screws are fastened, and that there are no loose screws.
5 Make sure each connectors are correctly inserted.
Please be sure that all connectors are inserted, and that there are no imperfect insertion.
6 Make sure the wiring cables are set to their original state.
Please replace the wiring and cables to the original state after repairs.
In addition, be sure that there are no pinched wires, etc.
7 Make sure screws and soldering scraps do not remain inside the product.
Please check that neither solder debris nor screws remain inside the product.
8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.
Damaged power cords may lead to fire accidents, so please be sure that there are no damages.
If you find a damaged power cord, please exchange it with a suitable one.
9 There should be no spark traces or similar marks on the power plug.
When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure 
connections and suitable usage. Please exchange the power cord if necessary.
0 Safe environment should be secured during servicing.
When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries. 
Please pay attention to your surroundings and repair safely. 
2. Adjustments
To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.
Adjustments should be performed in accordance with the procedures/instructions described in this manual.
4. Cleaning
For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper 
cleaning should be performed to restore their performances.
3. Lubricants, Glues, and Replacement parts
Use grease and adhesives that are equal to the specified substance. 
Make sure the proper amount is applied.
5. Shipping mode and Shipping screws
To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be 
installed before shipment. Please be sure to follow this method especially if it is specified in this manual.
DEH-1850/XN/ES 35 6 7 8
 
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CONTENTS
 SAFETY INFORMATION..................................................................................................................................... 2
1. SPECIFICATIONS ............................................................................................................................................ 5
2. EXPLODED VIEWS AND PARTS LIST ............................................................................................................ 6
2.1 PACKING ................................................................................................................................................... 6
2.2 EXTERIOR................................................................................................................................................. 8
2.3 CD MECHANISM MODULE..................................................................................................................... 10
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM.......................................................................................... 12
3.1 BLOCK DIAGRAM ................................................................................................................................... 12
3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE).............................................................................. 14
3.3 KEYBOARD UNIT.................................................................................................................................... 20
3.4 CD MECHANISM MODULE..................................................................................................................... 22
4. PCB CONNECTION DIAGRAM ..................................................................................................................... 26
4.1 TUNER AMP UNIT................................................................................................................................... 26
4.2 KEYBOARD UNIT.................................................................................................................................... 30
4.3 CD CORE UNIT(S10.5) ........................................................................................................................... 32
5. ELECTRICAL PARTS LIST ............................................................................................................................ 34
6. ADJUSTMENT ............................................................................................................................................... 38
6.1 CD ADJUSTMENT...................................................................................................................................38
6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT .................................................... 40
6.3 ERROR MODE ........................................................................................................................................ 42
6.4 SYSTEM MICROCOMPUTER TEST PROGRAM ................................................................................... 43
7. GENERAL INFORMATION............................................................................................................................. 44
7.1 DIAGNOSIS ............................................................................................................................................. 44
7.1.1 DISASSEMBLY ..................................................................................................................................... 44
7.1.2 CONNECTOR FUNCTION DESCRIPTION.......................................................................................... 47
7.2 PARTS...................................................................................................................................................... 48
7.2.1 IC .......................................................................................................................................................... 48
7.2.2 DISPLAY ............................................................................................................................................... 56
7.3 OPERATIONAL FLOW CHART ............................................................................................................... 57
8. OPERATIONS ................................................................................................................................................ 58
DEH-1850/XN/ES4
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1. SPECIFICATIONS
DEH-1850/XN/ES 55 6 7 8
 
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2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
NOTES : • Parts marked by " * " are generally unavailable because they are not in our Master Spare Parts List. 
 • The > mark found on some component parts indicates the importance of the safety factor of the part.
 Therefore, when replacing, be sure to use parts of identical designation. 
 • Screw adjacent to mark on the product are used for disassembly.
 • For the applying amount of lubricants or glue, follow the instructions in this manual.
 (In the case of no amount instructions,apply as you think it appropriate.)
"
15
18
11
12
13
1616
10
9
8
7
5
4
2
17
14
DEH-1850/XN/ES6
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PACKING SECTION PARTS LIST
Owner's Manual,Installation Manual
Mark No. Description Part No.
 1 Accessory Assy CEA4850
 2 Screw Assy CEA3849
 3 •••••
 4 Screw CBA1650
 * 5 Polyethylene Bag CEG-127
 6 Screw CRZ50P090FTC
 7 Screw TRZ50P080FTC
 * 8 Polyethylene Bag CEG-158
 9 Handle CNC5395
 10 Bush CNV3930
 11 Polyethylene Bag CEG-162
 12 Carton CHG5639
 13 Contain Box CHL5639
 14 Protector CHP2664
 15 Protector CHP2868
 16-1 Owner's Manual CRD4039
 16-2 Installation Manual CRD4030
 16-3 Caution Card CRP1310
 17 Cord Assy XDE7008
 18 Case Assy CXB3520
Mark No. Description Part No.
Part No. Language
CRD4039 English, Spanish, Portuguese(B), Traditional Chinese, Arabic
CRD4030 English, Spanish, Portuguese(B), Traditional Chinese, Arabic
DEH-1850/XN/ES 75 6 7 8
 
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2.2 EXTERIOR
59
DEH-1850/XN/ES8
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EXTERIOR SECTION PARTS LIST
Mark No. Description Part No.
 1 Screw BSZ26P060FTC
 2 Screw BSZ26P100FTC
3 Cord Assy XDE7008
 4 •••••
5 Cable CDE7983
 6 Case CNB2793
 7 Holder CNC8659
 8 Insulator CNM9145
9 Tuner Amp Unit CWN1271
 10 Screw ASZ26P060FTC
 11 Screw BMZ26P160FTC
 12 Screw BPZ26P080FTC
 > 13 Fuse(10 A) CEK1208
 14 Pin Jack(CN352) CKB1059
 15 Plug(CN901) CKM1376
 16 Connector(CN831) CKS3581
17 Connector(CN651) CKS3832
18 •••••
 19 Antenna Jack(CN401) CKX1056
 20 Holder CND2414
 21 Holder CND2413
 22 Heat Sink CNR1762
 23 FM/AM Tuner Unit CWE1952
 24 Holder CND1054
 25 Button(DETACH) CAC4836
 26 Spring CBH1835
 27 Spring CBH2208
 28 Spring CBH2367
 29 Bracket CNC6791
 30 Holder CNC8042
 31 Cover CNM6276
 32 Panel CNS8404
 33 Arm CNV4692
 34 Arm CNV4728
 35 Arm CNV5576
 36 Screw IMS20P030FTB
 37 Detach Grille Assy CXC5235
 38 Screw BPZ20P100FTB
39 Button(DETACH) CAC9382
40 Button(VOLUME(+/ -)) CAC9384
 41 Button(CLOCK,1-6,LOCAL/BSM,AUDIO) CAC9385
 42 Button(<, >EJECT) CAC9389
 43 Panel CNS8389
 44 Button(EQ,LOUDNESS) CAC9390
 45 Button(SOURCE,BAND) CAC9383
 46 Spring CBH2210
 47 Cover CNS8367
 48 LCD CAW1905
 49 Connector(CN1801) CKS3580
 50 Holder CND2949
51 Transistor(Q911,921,991) 2SD2396
52 IC(IC302) PAL007B
 53 Lighting Conductor CNV8712
 54 Rubber CNV8713
 55 Connector CNV8714
 56 Grille Unit CXC5278
57 Chassis Unit CXC3600
 58 CD Mechanism Module(S10.5) CXK5701
 59 Spacer CNN1238
Mark No. Description Part No.
DEH-1850/XN/ES 95 6 7 8
 
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2.3 CD MECHANISM MODULE
DEH-1850/XN/ES10
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CD MECHANISM MODULE SECTION PARTS LIST
Mark No. Description Part No.
 1 CD Core Unit(S10.5) CWX3090
 2 Connector(CN101) CKS4182
 3 Connector(CN702) CKS4185
 4 Screw BMZ20P025FTC
 5 Screw BSZ20P040FTC
 6 Screw(M2 x 3) CBA1511
 7 Screw(M2 x 4) CBA1835
 8 Washer CBF1038
 9 •••••
 10 Spring CBH2609
 11 Spring CBH2612
 12 Spring CBH2614
 13 Spring CBH2616
 14 Spring CBH2617
 15 Spring CBH2620
 16 Spring CBH2855
 17 Spring CBH2937
 18 Spring CBH2735
 19 Spring CBH2854
 20 Spring CBH2642
 21 Spring CBH2856
 22 Spring CBH2857
 23 Spring CBH2860
 24 Spring CBH2861
 25 Spring CBL1686
 26 Arm CND1909
 27 Frame CND2582
 28 Bracket CND2583
 29 Arm CND2584
 30 Lever CND2585
 31 Arm CND2586
 32 Bracket CND2587
 33 Arm CND2588
 34 Lever CND2589
 35 Holder CNV7201
 36 Gear CNV7207
 37 Gear CNV7208
 38 Gear CNV7209
 39 Gear CNV7210
 40 Gear CNV7211
 41 Gear CNV7212
 42 Rack CNV7214
 43 Arm CNV7216
 44 Roller CNV7218
 45 Gear CNV7219
 46 Guide CNV7361
 47 Gear CNV7595
 48 Guide CNV7799
 49 Arm CNV7805
 50 Rack CNV8342
 51 Roller CNV8343
 52 Holder CNV8344
 53 Arm CNV8345
 54 Guide CNV8347
 55 Arm CNV8348
 56 Arm CNV8349
 57 Arm CNV8350
 58 Clamper CNV8365
 59 Arm CNV8386
 60 Guide CNV8396
 61 Arm CNV8413
 62 Collar CNV8938
 63 Motor Unit(M2) CXC4026
 64 Arm Unit CXC4027
 65 Chassis Unit CXC4028
 66 Gear Unit CXC4029
 67 Frame Unit CXC4031
 68 Motor Unit(M1) CXC6742
 69 Screw Unit CXC6359
 70 Screw JFZ20P020FTC
 71 Screw JGZ17P022FTC
 72 Washer YE20FTC
 73 Pickup Unit(P10.5)(Service) CXX1942
 74 Screw IMS26P030FTC
Mark No. Description Part No.
DEH-1850/XN/ES 115 6 7 8
 
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SYSTEM 
IC
PE
1 2 3 4
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
PICKUP UNIT
(P10.5)(SERVICE) D CD CORE UNIT(S10.5)C
BRST,BRXEN,BSRQ
CN702
Q101
M
LASER
DIODE
MONITOR
DIODE
S903
DSCSNS
SPINDLE
MOTOR
MCARRIAGEMOTOR
LOAD/
LD-
MD
15
5
HOLOGRAM 
UNIT
IC301
BA5839FP
CD
DRIVER
1
VD
VD
16
LOUT
11
CN101
16
VO3(-)
15
VO3(+)
18
VO4(-)
17
VO4(+)
22
LDIN
19LOUT
9MUTE
AC,BD
F,E
S901
HOME
S904
12EJ
S905
8EJ
LD+ 14
1
LD
2
PD
PA1/12SNS
PA4/CONT
PA6/LOEJ
PA0/HOME
36
35
41
39
VDD
PB1/VDCONT
56
CD CONTROLLER
IC201
PE5497B
54PC7/CDMUTE
2
VDD
9
BDATA,BSCK
VDD
15
5
FOCUS ACT.
TRACKING ACT.
FOP
TOP
2
1 TOP
FOP
11 VO1(-)
14 VO2(+)
2
1
14
VDCONT
23
25
X201
XTAL
/XTAL
PA2/8SNS
37
PA3/DSCSNS
38
29
RESET
8
10/RESET
CDMUTE
88VREF
REFO 93
REFOUT
33
FOM FOM
12 VO1(+)
44TOM TOM
13 VO2(-)
21CNT PA5/CLCONT
40
16.93MHz
Q102
VDD1212VCC VCC 42 PA7/CD3V
FD,TD
SD,MD
V+3A
TUN_Lch
CD_Lch
CN401
1
2
CN651
TUNER AMP UNIT
LOUTA
TUN 3.3V
VCC(SYS 8V)
VDD
ANTENNA
T
U
N
P
D
I
T
U
N
P
C
K
T
U
N
P
D
O
BRST,BRXEN,BSRQ
BDATA,BSCK
CD VD
VD
VDCONT
IC962
BD7802FP
CD 3V REGULATOR
1 3
5
19
12
10
13
11
B.UP
Q991
20
Q992
VDD
RESET
NC36
FM/AM TUNER UNIT
FMRF
ANT adj
RF adj
FM ANT
T51 CF52
R
FG
N
D
O
S
C
G
N
D
D
G
N
D
A
U
D
IO
G
N
D
N
C
V
C
C
V
D
D
_3
.3
3.3V 2.5V
IC 4
3.3V 2.5V←
IC 2
2.5V
N
C
C
E
2
R
O
M
_V
D
D S
L D
I
C
K
C
E
1
N
C
D
O
N
C
N
C
N
C
N
C
7 6 13 5 10 9 8 11 14 18 19 20 21
1
3
2 12 15 22 16 4 17
IC 1
3.3V
AM ANT FMRF
ATT
LPFOSC
IC 3 EEPROM
5.0V
IC 5
5V 3.3V←
ATT
MIXER, IF AMP DET, FM MPX
24
23
Rch
Lch
DEH-1850/XN/ES12
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B
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TU
CD
3
5 6 7 8
FL-
FL+
RL-
RL+
3
9
11
12
10
1
6
2
BACK UP
GND
FUSE
10A
ACC
B. REM
7
Rear_ L
IN1-L
IN2-L
1
IC151
PML014A
ELECTRONIC VOLUME/
SOURCE SELECTOR
N_Lch
2_Lch
6
Front_ L
60
BSENS
ASENS
VDD
B.UP
63
64
48MUTE
23
21
3
5
FL-
FL+
RL-
RL+
BREM
ACC
RLIn
12
22
4
POWER AMP
IC601(1/2)
PE5518A
SYSTEM CONTROLLER
IC963
BD4834G
IC302
PAL007B(50W)
VDD
Q911
Q931
SYSPW
VDD
STBYMUTE
IC1801
PD6340A
LCD DRIVER/
KEY CONTROLLER
5
7
CN1801CN831
Q801
KEYBOARD UNIT
V
C
K
, V
D
T
, V
S
T
43SYSPW
Q452(1/2)
Q452(2/2)
MUTE
B.UP
Q821
18
20
DPDT
KYDT
LCD
MUTE
SYSTEM CONTROLLER
25BREM
VDD REGULATOR
BACKUP SENSE
ACC SENSE
3
9
11
12
10
1
6
2
B
CN901
TUNPCE1
TUNPCE2
TUNPDI
R
E
S
E
T
TUNPDO
SL
56
55
11
12
76
TUNPCK13
TUNPDO
TUN3V
TUN 3V REG.
B.UP
SYS 8V REG.
TUNPDI
CE1
CE2
SL
TUNPCK
Q912
DALMON
32
B.UP
6,20
6
4
8
3
5
7
6
4
8
3
SOURCE
5.1V
SWVDD
SRC
DSENS
ILM
DPDT
KYDT
S1805
SWVDD
21
66
DSENS
65
ILMPW
22
DPDT
9
KYDT
8
RLch
CN352
2
FLIn
14
Q822
DSENS
SOURCE
SWVDD
BSENS
ASENS
X1
X2
70
X601
12.58291MHz69
KEY DATA
X0
X1
22
X1801
5MHz23
Q352
KEY MATRIX
EJECT
S1819
S1829
BAND
S1820
AUDIO
S1818
S1838
DISP/LOUD
S1826
S1827
VOL-
S1807
CLOCK
S1809
S1839
6ch/PAUSE
S1811
LOC
S1810
LEFT
S1813
S1821
RIGHT
S1816
S1824
4ch/RDM
S1812
UP
S1815
S1823
DOWN
S1814
S1822
5ch/RPT
S1802
BTB
S1803
S1825
3ch
S1804
VOL+
S1801
2ch
S1806
RESET
IC601(2/2)
PE5518A
IC901
NJM2885DL1-33
SW5V
SOURCE
DPDT
KYDT
ILL
1ch
S1808
VCC
1 3
SWVDD
ILMPW
MUTE
1 2
VCC
(SYS 8V)
Q921
Q923
NC6
DEH-1850/XN/ES 135 6 7 8
 
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3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)
A-a A-b 
A-a A-b 
A-b A-a 
Large size
SCH diagram
Guide page
Detailed page
Note: When ordering service parts, be sure to refer to " EXPLODED VIEWS AND PARTS LIST" or 
"ELECTRICAL PARTS LIST".
A-a
A
B CN1801
Decimal points for resistor
and capacitor fixed values
are expressed as :
2.2 2R2
0.022 R022
← 
← 
The > mark found on some component parts indicates
the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of
identical designation. 
Symbol indicates a resistor.
No differentiation is made between chip resistors and
discrete resistors.
NOTE :
Symbol indicates a capacitor.
No differentiation is made between chip capacitors and
discrete capacitors.
C CN702
F
M
/A
M
 T
U
N
E
R
 U
N
IT
C
D
R
E
S
E
T
S
O
U
R
C
E
STRKEY
DEH-1850/XN/ES14
1 2 3 4
 
C
D
F
A
B
E
A-a A-b 
A-a A-b 
A-b A-a 
2
C
D
R
E
S
E
T
S
O
U
R
C
E
5 6 7 8
A-b
A
CEK1208 10A
>
>
A TUNER AMP UNIT
600 H
STRKEY2
DEH-1850/XN/ES 155 6 7 8
 
C
D
F
A
B
E
1 2 3 4
A
-a
A
-b
A
-a
A-a
A-b 1 2 3
C
C
N
70
2
FM/AM TUNER UNIT
SOURCE
DEH-1850/XN/ES16
1 2 3 4
 
C
D
F
A
B
E
M TU
5 6 7 8
A
-a
A
-b
A
-a
A-a
A-b4 5
B
C
N
18
01
D
ec
im
al
 p
oi
nt
s 
fo
r 
re
si
st
or
an
d 
ca
pa
ci
to
r 
fix
ed
 v
al
ue
s
ar
e 
ex
pr
es
se
d 
as
 :
2.
2 
 
2R
2
0.
02
2 
 
R
02
2
←
 
←
 
T
he
 >
 m
ar
k 
fo
un
d 
on
 s
om
e 
co
m
po
ne
nt
 p
ar
ts
 in
di
ca
te
s
th
e 
im
po
rt
an
ce
 o
f t
he
 s
af
et
y 
fa
ct
or
 o
f t
he
 p
ar
t.
T
he
re
fo
re
, w
he
n 
re
pl
ac
in
g,
 b
e 
su
re
 to
 u
se
 p
ar
ts
 o
f
id
en
tic
al
 d
es
ig
na
tio
n.
 
S
ym
bo
l i
nd
ic
at
es
 a
 r
es
is
to
r.
N
o 
di
ffe
re
nt
ia
tio
n 
is
 m
ad
e 
 b
et
w
ee
n 
ch
ip
 r
es
is
to
rs
 a
nd
di
sc
re
te
 r
es
is
to
rs
.
N
O
T
E
 : S
ym
bo
l i
nd
ic
at
es
 a
 c
ap
ac
ito
r.
N
o 
di
ffe
re
nt
ia
tio
n 
is
 m
ad
e 
 b
et
w
ee
n 
ch
ip
 c
ap
ac
ito
rs
 a
nd
di
sc
re
te
 c
ap
ac
ito
rs
.
FM/A
CDRESET
S
T
R
K
E
Y
2
DEH-1850/XN/ES 175 6 7 8
 
C
D
F
A
B
E
1 2 3 4
A
-a
A
-b
A-b 1 2 3
C
E
K
12
08
10
A
>
>
A
T
U
N
E
R
 A
M
P
 U
N
IT
60
0µ
H
DEH-1850/XN/ES18
1 2 3 4
 
C
D
F
A
B
E
C
E
K
12
08
10
A
5 6 7 8
A
-a
A
-b
A-b4 5
>
60
0µ
H
DEH-1850/XN/ES 195 6 7 8
 
C
D
F
A
B
E
 
1 2 3 4
3.3 KEYBOARD UNIT
B
LCD DRIVER
B KEYBOARD UNIT
DEH-1850/XN/ES20
1 2 3 4
 
C
D
F
A
B
E
5 6 7 8
B
A CN831
DEH-1850/XN/ES 215 6 7 8
 
C
D
F
A
B
E
 
CS
CS
1 2 3 4
3.4 CD MECHANISM MODULE
C
CD CORE UNIT(S10.5)
PICKUP UNIT(P10.5)(SERVICE)
C
F
T
T
F
T
T
F
F
T
T
F
F
T
F
F
T
S
S
C
C
F
T
F
F
T
T
S
C
S S C C
9
0
8
5
$
4
7
@
#
%
M1 CXC6742
SPINDLE MOTOR
M2 CXC4026
LOADING/CARRIAGE MOTOR
CD DRIVER
SWITCHES:
CD CORE UNIT(S10.5)
 S901:HOME SWITCH..........ON-OFF
 S903:DSCSNS SWITCH......ON-OFF
 S904:12EJ SWITCH.............ON-OFF
 S905:8EJ SWITCH...............ON-OFF
The underlined indicates the switch position.
DEH-1850/XN/ES22
1 2 3 4
 
C
D
F
A
B
E
S
C
5 6 7 8
C
A CN651
FTCS
FTCS
^
6
&
!
F
SIGNAL LINE
FOCUS SERVO LINE
TRACKING SERVO LINE
CARRIAGE SERVO LINE
SPINDLE SERVO LINE
T
C
S
CD DSP
DEH-1850/XN/ES 235 6 7 8
 
C
D
F
A
B
E
1 2 3 4
- Waveforms Note : 1. The encircled numbers denote measuring points in the circuit diagram.
2. Reference voltage REFO1(1.65 V)
1 DSCSNS
2 8SNS
3 12SNS
4 LOEJ
5 V/div
5 V/div
5 V/div
5 V/div
12 cm CD Loading operation
Ref.:
GND
Mode:
Normal
1 DSCSNS
2 8SNS
3 12SNS
4 LOEJ
5 V/div
5 V/div
5 V/div
5 V/div
500 ms/div
Ref.:
GND
Mode:
Normal
1 DSCSNS
5 CLCONT
4 LOEJ
6 VD
5 V/div
5 V/div
5 V/div
10 V/div
500 ms/div
12 cm CD Loading operation 8 cm CD Loading operation
Ref.:
GND
Mode:
Normal
CD-DA Play operation
Ref.:
REFO
Mode:
Normal
Ref.:
REFO
Mode:
Normal
$ MDX
7 SIN
2 V/div
500 mV/div
50 ms/div $ MDX
7 SIN
2 V/div
500 mV/div
5 µs/div
Spindle waveform during play operation
Ref.:
REFO
Mode:
Normal
0 FIN
# FE
500 mV/div
500 mV/div
Focus Search waveform
Ref.:
REFO
Mode:
TEST
% RFAGC
@ TE
9 TIN
1 V/div
500 mV/div
500 mV/div
500 µs/div
Ref.:
REFO
Mode:
TEST
@ TE
% RFAGC
500 mV/div
500 mV/div
2 ms/div
Track Open waveform 1 Track Jump waveform
Ref.:
REFO
Mode:
TEST
7 SIN
8 CIN
9 TIN
1 V/div
500 mV/div
500 mV/div
12 cm CD-DA setup operation after loading Source On setup operation
Ref.:
REFO
Mode:
Normal
@ TE
# FE
500 mV/div
500 mV/div
200 ms/div
Ref.:
REFO
Mode:
Normal
0 FIN
! RFOK
 (MONI_2)
7 SIN
200 mV/div
2 V/div
2 V/div
500 ms/div
12 cm CD-DA Source On setup operation
Ref.:
REFO
Mode:
Normal
500 ms/div
200 ms/div
2 s/div
# FE
0 FIN
@ TE
9 TIN
500 mV/div
500 mV/div
500 mV/div
500 mV/div
20 ms/div
Spindle waveform during play operation
(Wider)
DEH-1850/XN/ES24
1 2 3 4
 
C
D
F
A
B
E
5 6 7 8
% RFAGC
@ TE
9 TIN
1 V/div
500 mV/div
500 mV/div
500 µs/div
4 Tracks Jump waveform
Ref.:
REFO
Mode:
TEST
% RFAGC
@ TE
9 TIN
1 V/div
500 mV/div
500 mV/div
2 ms/div
Ref.:
REFO
Mode:
TEST
% RFAGC
@ TE
9 TIN
1 V/div
500 mV/div
500 mV/div
1 ms/div
10 Tracks Jump waveform 32 Tracks Jump waveform
Ref.:
REFO
Mode:
TEST
1 DSCSNS
5 CLCONT
4 LOEJ
5 V/div
5 V/div
5 V/div
500 ms/div
12 cm CD Eject operation
Ref.:
GND
Mode:
Normal
Ref.:
REFO
Mode:
Normal
8 cm CD Eject operation Black dot(800 µm) during play
Ref.:
GND
Mode:Normal
% RFAGC
@ TE
8 CIN
7 SIN
1 V/div
1 V/div
500 mV/div
2 V/div
200 ms/div
Search operation(Outter to Inner)
Ref.:
REFO
Mode:
Normal
1 DSCSNS
2 8SNS
3 12SNS
4 LOEJ
5 V/div
5 V/div
5 V/div
5 V/div
500 ms/div
1 DSCSNS
2 8SNS
3 12SNS
4 LOEJ
5 V/div
5 V/div
5 V/div
5 V/div
500 ms/div
Ref.:
GND
Mode:
Normal
^ LOUT
& ROUT
1 V/div
1 V/div
200 µs/div
Analog audio waveform 12 cm CD Eject operation
Ref.:
AGND
Mode:
Normal
% RFAGC
9 TIN
@ TE
0 FIN
1 V/div
1 V/div
1 V/div
1 V/div
500 µs/div
DEH-1850/XN/ES 255 6 7 8
 
C
D
F
A
B
E
 
1 2 3 4
4. PCB CONNECTION DIAGRAM
4.1 TUNER AMP UNIT
A
A TUNER AMP UNIT
CapacitorConnector
P.C.Board Chip Part
SIDE B
SIDE A
NOTE FOR PCB DIAGRAMS
1.The parts mounted on this PCB
 include all necessary parts for
 several destination.
 For further information for
 respective destinations, be sure
 to check with the schematic dia-
 gram.
2.Viewpoint of PCB diagrams
CN651
B CN1801
C CN702
CORD ASSY
3
2
1
DEH-1850/XN/ES26
1 2 3 4
 
C
D
F
A
B
E
5 6 7 8
A
SIDE A
FRONT
ANTENNA JACKREAR OUTPUT
F
M
/A
M
 T
U
N
E
R
 U
N
IT
1 42 3
2
1
DEH-1850/XN/ES 275 6 7 8
 
C
D
F
A
B
E
1 2 3 4
A
A TUNER AMP UNIT
IC151
TEST
PCL
DEH-1850/XN/ES28
1 2 3 4
 
C
D
F
A
B
E
EST
5 6 7 8
A
SIDE B
IC963
DEH-1850/XN/ES 295 6 7 8
 
C
D
F
A
B
E
 
1 2 3 4
4.2 KEYBOARD UNIT
B
B KEYBOARD UNIT B KEYBOARD UNITSIDE A SIDE B
D1810
R1815
R1814
R1813
R1812
R1808 R1809
R1807
R
18
11
A CN831
V
O
L+
V
O
L-
E
Q
D
IS
P
/L
O
U
D
C
LO
C
K
1c
h
2c
h
3c
h
4c
h/
R
D
M
5c
h/
R
P
T
6c
h/
P
A
U
S
E
LO
C
LE
F
T
R
IG
H
T
E
JE
C
T
S
O
U
R
C
E
A
U
D
IO
B
A
N
D
DEH-1850/XN/ES30
1 2 3 4
 
DEH-1850/XN/ES 31
5 6 7 8
5 6 7 8
C
D
F
A
B
E
 
C
D
F
A
B
E
 
1 2 3 4
4.3 CD CORE UNIT(S10.5)
C
C CD CORE UNIT(S10.5) SIDE A
18
CN702
IC301
M2
LOADING
/CARRIAGE
MOTOR
M1
SPINDLE
MOTOR
F
E
REFO1
PICKUP UNIT(P10.5)(SERVICE)
A
CN651
HOME
1
2
3
DEH-1850/XN/ES32
1 2 3 4
 
C
D
F
A
B
E
5 6 7 8
C
C CD CORE UNIT(S10.5) SIDE B
C
10
3
C
20
5
C709
C
30
1 Q
10
2
Q
10
3
Q101
12EJ 8EJ
DSCSNS
DEH-1850/XN/ES 335 6 7 8
 
C
D
F
A
B
E
 
1 2 3 4
5. ELECTRICAL PARTS LIST
NOTE:
• Parts whose parts numbers are omitted are subject to being not supplied.
• The part numbers shown below indicate chip components.
 Chip Resistor
 RS1/_S___J,RS1/__S___J
 Chip Capacitor (except for CQS.....)
 CKS....., CCS....., CSZS.....
• The > mark found on some component parts indicates the importance of the safety factor of the part.
 Therefore, when replacing, be sure to use parts of identical designation. 
• Meaning of the figures and others in the parentheses in the parts list.
 Example) IC 301 is on the point (face A, 91 of x-axis, and 111 of y-axis) of the corresponding 
 PC board.
 IC 301 (A, 91, 111) IC NJM2068V
Circuit Symbol and No. Part No.
Unit Number : CWN1271
Unit Name : Tuner Amp Unit
Unit Number :
Unit Name : Keyboard Unit
Unit Number : CWX3090
Unit Name : CD Core Unit(S10.5)
A
Unit Number : CWN1271
Unit Name : Tuner Amp Unit
MISCELLANEOUS
IC 151 (B,133,80) IC PML014A
IC 302 (A,94,135) IC PAL007B
IC 601 (B,87,62) IC PE5518A
IC 901 (B,143,29) IC NJM2885DL1-33
IC 962 (B,22,36) Regulator IC BD7802FP
IC 963 (B,62,83) IC BD4834G
Q 352 (B,160,129) Transistor UMH3N
Q 452 (B,139,128) Transistor UMD2N
Q 801 (B,80,29) Transistor 2SA1036K
Q 821 (B,43,15) Transistor 2SA1036K
Q 822 (B,31,17) Transistor DTC114EU
Q 911 (A,8,116) Transistor 2SD2396
Q 912 (B,9,128) Transistor UMD2N
Q 921 (A,8,103) Transistor 2SD2396
Q 923 (B,24,79) Transistor UMD2N
Q 931 (B,61,107) Transistor UMX1N
Q 991 (A,8,69) Transistor 2SD2396
Q 992 (B,21,58) Transistor UMD2N
D 551 (A,62,124) Diode MPG06G-6415G3
D 552 (A,59,124) Diode MPG06G-6415G3
D 901 (A,35,131) Diode MPG06G-6415G3
D 902 (A,35,128) Diode MPG06G-6415G3
D 911 (A,21,106) Diode MPG06G-6415G3
D 912 (A,18,120) Diode HZS6L(B2)
D 921 (A,24,87) Diode HZS9L(B3)
D 931 (A,69,115) Diode HZS7L(C3)
D 932 (A,54,108) Diode HZS7L(A1)
D 961 (A,56,74) Diode 1SS133
D 991 (A,20,66) Diode HZS7L(C3)
L 151 (A,146,93) Inductor LAU2R2K
L 401 (A,157,58) Inductor LAU2R2K
L 402 (A,148,88) Inductor LAU2R2K
L 404 (B,160,101) Inductor LCTAW220J2520
L 601 (A,93,85) Ferri-Inductor LAU100K
L 602 (A,103,67) Inductor LAU2R2K
L 651 (A,41,38) Inductor LAU2R2K
L 801 (A,88,25) Inductor LAU2R2K
L 901 (A,36,108) Choke Coil 600µH CTH1280
X 601 (A,103,71) Radiator 12.58291MHz CSS1402
>FU352 (B,143,135) Fuse 3A CEK1286
> Fuse 10A CEK1208
AR401 (A,161,110) Arrester DSP-201M-S00B
FM/AM Tuner Unit CWE1952
RESISTORS
R 301 (B,93,104) RS1/16S153J
R 353 (B,144,128) RS1/16S821J
R 354 (B,164,128) RS1/16S821J
R 357 (B,145,133) RS1/16S223J
R 358 (B,164,135) RS1/16S223J
R 405 (B,155,62) RS1/16S681J
R 407 (B,159,87) RAB4C681J
R 414 (B,159,91) RS1/16S681J
R 420 (B,99,48) RS1/16S681J
R 421 (B,160,79) RS1/16S473J
R 454 (B,135,127) RS1/16S103J
R 455 (B,140,130) RS1/16S153J
R 456 (B,140,133) RS1/16S221J
R 457 (B,99,50) RS1/16S681J
R 602 (B,109,58) RS1/16S473J
R 606 (B,111,61) RS1/16S104J
R 607 (B,107,61) RS1/16S222J
R 608 (B,106,74) RS1/16S0R0J
R 609 (B,102,43) RS1/16S473J
R 610 (B,99,52) RS1/16S681J
Circuit Symbol and No. Part No.
DEH-1850/XN/ES34
1 2 3 4
 
C
D
F
A
B
E
 
5 6 7 8
R 612 (B,106,57) RS1/16S103J
R 613 (B,72,54) RS1/16S104J
R 633 (B,53,73) RS1/16S104J
R 650 (B,50,50) RS1/16S102J
R 651 (B,58,36) RS1/16S104J
R 652 (B,60,38) RS1/16S102J
R 655 (A,76,51) RD1/4PU102J
R 659 (B,84,43) RS1/16S221J
R 660 (B,93,46) RS1/16S681J
R 662 (B,102,40) RS1/16S682J
R 663 (B,81,43) RS1/16S682J
R 670 (B,76,54) RS1/16S104J
R 671 (B,79,43) RS1/16S104J
R 801 (B,77,29) RS1/16S153J
R 802 (B,95,25) RS1/16S153J
R 803 (B,104,23) RS1/16S222J
R 821 (B,34,18) RS1/16S562J
R 822 (B,74,29) RS1/16S102J
R 823 (B,38,15) RS1/16S103J
R 833 (A,80,17) RD1/4PU222J
R 834 (A,82,17) RD1/4PU222J
R 835 (A,68,20) RD1/4PU102J
R 836 (A,72,26) RD1/4PU104J
R 837 (A,78,25) RD1/4PU103J
R 838 (B,89,89) RS1/16S102J
R 841 (B,52,15) RS1/16S1R0J
R 848 (A,105,46) RD1/4PU102J
R 851 (A,103,46) RD1/4PU102J
R 852 (B,91,89) RS1/16S102J
R 911 (B,11,124) RS1/16S183J
R 912 (A,8,131) RD1/4PU152J
R 913 (B,18,110) RS1/16S0R0J
R 923 (A,19,90) RD1/4PU821J
R 931 (B,65,112) RS1/16S473J
R 932 (B,65,110) RS1/16S104J
R 933 (A,55,116) RD1/4PU102J
R 934 (B,61,110) RS1/16S472J
R 935 (B,55,106) RS1/16S473J
R 936 (B,57,110) RS1/16S223J
R 940 (B,86,81) RS1/16S104J
R 941 (B,89,81) RS1/16S104J
R 961 (B,67,78) RS1/16S102J
R 962 (B,62,78) RS1/16S183J
R 991 (A,20,61) RD1/4PU271J
R 992 (A,15,68) RD1/4PU221J
CAPACITORS
C 151 (B,160,73) CKSRYB224K10
C 152 (B,160,75) CKSRYB224K10
C 153 (B,130,69) CKSRYB105K6R3
C 154 (B,142,74) CKSRYB105K6R3
C 165 (B,136,91) CKSRYB104K16
C 166 (A,134,92) CEJQ470M10
C 167 (A,128,92) CEJQ100M16
C 301 (B,119,108) CKSQYB474K16
C 302 (B,128,111) CKSQYB474K16
C 303 (B,131,122) CKSQYB474K16
C 304 (B,123,107) CKSQYB474K16
C 305 (B,119,113) CKSRYB474K10
Circuit Symbol and No. Part No.
C 306 (B,131,114) CKSRYB474K10
C 307 (B,134,124) CKSRYB474K10
C 308 (B,126,109) CKSRYB474K10
C 309 (B,136,132) CKSQYB225K10
C 310 (B,137,136) CKSQYB225K10
C 312 (A,104,125) CEJQ100M16
C 313 (B,100,142) CKSRYB104K16
C 353 (A,134,120) CEJQ2R2M50
C 354 (A,134,110) CEJQ2R2M50
C 401 (B,160,69) CKSRYB103K50
C 402 (B,154,59) CKSRYB103K50
C 403 (A,151,58) CEJQ470M6R3
C 404 (A,151,95) CEJQ101M10
C 405 (B,167,97) CKSRYB103K50
C 409 (B,147,56) CCSRCH470J50
C 410 (B,122,15) CKSRYB102K50
C 420 (B,108,43) CCSRCH470J50
C 451 (A,132,132) CEJQ330M10
C 601 (B,69,83) CKSRYB103K50
C 604 (B,98,75) CCSRCH200J50
C 605 (B,102,75) CCSRCH200J50
C 606 (B,109,71) CKSRYB104K16
C 608 (B,91,48) CCSRCH101J50
C 610 (A,101,82) CEJQ4R7M35
C 611 (B,96,80) CKSRYB224K10
C 651 (B,42,40) CKSRYB105K10
C 670 (B,44,42)CCSRCH221J50
C 801 (B,104,25) CKSRYB105K6R3
C 832 (B,49,13) CKSRYB104K16
C 901 (A,36,140) CEAT332M16(P45)
C 911 (A,16,96) CEJQ470M10
C 912 (B,12,133) CKSRYB103K50
C 913 (A,19,137) CEAT102M16
C 921 (A,25,66) 330µF/16V CCH1326
C 922 (A,24,82) CEJQ101M16
C 923 (B,23,85) CKSRYB103K50
C 961 (B,56,85) CKSRYB473K50
C 962 (B,60,75) CKSRYB105K6R3
C 964 (A,25,29) CEJQ220M10
C 965 (B,28,27) CKSRYB105K10
C 981 (B,135,25) CKSRYB334K10
C 983 (A,144,38) CEJQ470M10
C 991 (B,17,63) CKSRYB473K50
C 992 (A,17,54) CEJQ101M10
B
Unit Number :
Unit Name : Keyboard Unit
MISCELLANEOUS
IC 1801 (B,32,100) IC PD6340A
D 1803 (A,43,67) LED SML-310PT
D 1804 (A,43,79) LED SML-310PT
D 1805 (A,43,91) LED SML-310PT
D 1806 (A,28,29) LED SML-310PT
D 1807 (A,43,39) LED SML-310PT
D 1808 (A,43,55) LED SML-310PT
D 1809 (A,28,42) LED SML-310PT
D 1810 (A,29,50) LED NESW505C-5273
Circuit Symbol and No. Part No.
DEH-1850/XN/ES 355 6 7 8
 
C
D
F
A
B
E
1 2 3 4
D 1812 (A,17,12) LED SML-310PT
D 1813 (A,31,12) LED SML-310PT
D 1814 (A,12,154) LED SML-310PT
D 1815 (A,17,168) LED SML-310PT
D 1816 (A,31,168) LED SML-310PT
D 1817 (A,43,127) LED SML-310PT
D 1818 (A,43,115) LED SML-310PT
D 1819 (A,43,103) LED SML-310PT
D 1820 (A,28,136) LED SML-310PT
D 1821 (A,22,144) LED SML-310PT
D 1823 (A,42,140) LED SML-310PT
D 1824 (A,33,144) LED SML-310PT
D 1825 (A,28,152) LED SML-310PT
X 1801 (B,39,90) Ceramic Resonator 5.00MHz CSS1547
LCD CAW1905
RESISTORS
R 1801 (B,28,66) RS1/16S222J
R 1802 (B,30,66) RS1/16S222J
R 1807 (B,27,29) RS1/4SA471J
R 1808 (B,31,42) RS1/4SA471J
R 1809 (B,24,42) RS1/4SA681J
R 1810 (B,42,98) RS1/16S104J
R 1811 (B,21,29) RS1/4SA681J
R 1812 (B,30,123) RS1/4SA471J
R 1813 (B,35,128) RS1/4SA471J
R 1814 (B,32,133) RS1/4SA681J
R 1815 (B,40,136) RS1/4SA471J
CAPACITORS
C 1801 (B,42,102) CKSRYB103K50
C 1802 (A,28,45) CKSRYF104Z25
C
Unit Number : CWX3090
Unit Name : CD Core Unit(S10.5)
MISCELLANEOUS
IC 201 (A,39,54) IC PE5497B
IC 301 (A,33,18) IC BA5839FP
Q 101 (B,62,75) Transistor 2SA1577
Q 102 (B,20,28) Chip Transistor 2SB1689
X 201 (A,32,66) Ceramic Resonator 16.934MHz CSS1603
S 901 (A,58,41) Switch(HOME) CSN1067
S 903 (B,25,62) Switch(DSCSNS) CSN1067
S 904 (B,44,71) Switch(12EJ) CSN1068
S 905 (B,30,72) Switch(8EJ) CSN1068
RESISTORS
R 101 (B,62,77) RS1/10SR2R4J
R 102 (B,65,77) RS1/10SR2R4J
R 103 (B,65,75) RS1/10SR2R7J
R 105 (B,19,31) RS1/16SS102J
R 106 (B,20,30) RS1/16SS473J
R 108 (B,63,68) RS1/16SS105J
R 109 (B,49,64) RS1/16SS102J
R 214 (A,48,45) RS1/16SS332J
R 215 (A,47,44) RS1/16SS183J
Circuit Symbol and No. Part No.
R 216 (A,50,52) RS1/16SS122J
R 217 (A,52,50) RS1/16SS562J
R 218 (A,52,53) RS1/16SS472J
R 232 (A,29,63) RS1/16SS0R0J
R 235 (A,41,34) RS1/16SS103J
R 236 (A,41,33) RS1/16SS103J
R 237 (B,29,51) RS1/16SS221J
R 240 (B,25,48) RS1/16SS473J
R 242 (A,33,36) RS1/16SS103J
R 243 (A,32,36) RS1/16SS473J
R 245 (B,28,54) RS1/16SS104J
R 246 (A,49,43) RS1/16SS103J
R 252 (B,28,56) RS1/16SS104J
R 253 (B,28,55) RS1/16SS104J
R 254 (B,36,52) RS1/16SS104J
R 260 (B,26,44) RS1/16SS103J
R 262 (A,41,35) RS1/16SS472J
R 263 (A,41,32) RS1/16SS472J
R 264 (B,31,35) RS1/16SS102J
R 305 (A,39,24) RS1/16SS183J
R 306 (A,42,24) RS1/16SS183J
R 307 (A,40,26) RS1/16SS183J
R 308 (A,43,27) RS1/16SS183J
R 601 (A,38,72) RS1/16SS101J
R 602 (A,37,70) RS1/16SS101J
R 702 (A,27,45) RS1/16SS221J
R 706 (B,17,39) RS1/16SS221J
CAPACITORS
C 103 (B,59,68) CEVW101M16
C 203 (A,40,65) CKSSYB104K10
C 205 (B,48,55) CEVW220M6R3
C 206 (A,37,64) CKSSYB103K16
C 209 (A,33,64) CKSRYB104K16
C 210 (A,29,60) CKSSYB104K10
C 211 (A,29,59) CKSSYB104K10
C 212 (A,39,44) CKSSYB104K10
C 213 (A,48,43) CKSSYB103K16
C 214 (A,47,43) CKSSYB104K10
C 215 (A,43,45) CKSSYB104K10
C 216 (A,52,47) CKSSYB182K50
C 217 (A,52,52) CCSSCH560J50
C 218 (A,52,54) CCSSCH5R0C50
C 219 (A,48,51) CKSSYB104K10
C 220 (B,44,49) CKSSYB104K10
C 221 (A,48,48) CKSSYB104K10
C 222 (A,49,54) CKSSYB104K10
C 223 (A,51,58) CCSSCH680J50
C 224 (A,49,61) CCSSCH470J50
C 225 (A,49,64) CKSSYB103K16
C 229 (B,51,59) CKSSYB104K10
C 231 (B,38,37) CKSSYB102K50
C 232 (B,37,34) CKSSYB102K50
C 233 (B,31,55) CKSSYB103K16
C 236 (B,43,58) CKSSYB104K10
C 238 (A,39,70) CKSRYB104K16
C 240 (A,39,68) CKSRYB104K16
C 304 (A,40,24) CKSSYB472K25
C 305 (A,41,26) CKSSYB103K16
Circuit Symbol and No. Part No.
DEH-1850/XN/ES36
1 2 3 4
C
D
F
A
B
E
5 6 7 8
C 306 (A,26,14) CKSRYB105K10
C 705 (B,14,39) CCSSCH101J50
C 710 (B,15,37) CKSSYB102K50
Miscellaneous Parts List
Pickup Unit(P10.5)(Service) CXX1942
M 1 Motor Unit(SPINDLE) CXC6742
M 2 Motor Unit(LOADING/CARRIAGE) CXC4026
Circuit Symbol and No. Part No.
DEH-1850/XN/ES 375 6 7 8
C
D
F
A
B
E
1 2 3 4
6. ADJUSTMENT
6.1 CD ADJUSTMENT
1) Cautions on adjustments
• In this product the single voltage (3.3V) is used for the 
regulator. The reference voltage is the REFO1 (1.65V) 
instead of the GND.
If you should mistakenly short the REFO1 with the GND 
during adjustment, accurate voltage will not be obtained, 
and the servo’s misoperation will apply excessive shock 
to the pickup. To avoid such problems:
a. Do not mix up the REFO1 with the GND when 
connecting the (-) probe of measuring instruments. 
Especially on an oscilloscope, avoid connecting the (-) 
probe for CH1 to the GND. 
b. In many cases, measuring instruments have the same 
potential as that for the (-) probe. Be sure to set the 
measuring instruments to the floating state.
c. If you have mistakenly connected the REFO1 to the GND, 
turn off the regulator or the power immediately.
• Before mounting and removing filters or leads for 
adjustment, be sure to turn off the regulator.
• For stable circuit operation, keep the mechanism 
operating for about one minute or more after the 
regulator is turned on.
• In the test mode, any software protections will not 
work. Avoid applying any mechanical or electrical 
shock to the mechanism during adjustment.
• The RFI and RFO signals with a wide frequency range 
are easy to oscillate. When observing the signals, 
insert a resistor of 1k ohms in series.
• The load and eject operation is not guarantied with the 
mechanism upside down. If the mechanism is blocked 
due to mistaken eject operation, reset the product or 
turn off and on the ACC to restore it. 
2) Test mode
This mode is used to adjust the CD mechanism module.
• To enter the test mode.
While pressing the 4 and 6 keys at the same time, reset.
• To exit from the test mode.
Turn off the ACC and back up.
Notes:
a. During ejection, do not press any other keys than the 
EJECT key until the loaded disc is ejected.
b. If you have pressed the (→) key or (←) key during focus 
search, turn off the power immediately to protect the 
actuator from damage caused by the lens stuck.
c. For the TR jump modes except 100TR, the track jump 
operation will continue even if the key is released.
d. For the CRG move and 100TR jump modes, the tracking 
loop will be closed at the same time when the key is 
released.
e. When the power is turned off and on, the jump mode 
is reset to the single TR (91), the RF amp gain is set to 0dB, 
and the auto-adjustment values are reset to the default 
settings.
DEH-1850/XN/ES38
1 2 3 4
C
D
F
A
B
E
5 6 7 8
[Key]
Contents
Display
[4] + [6] + Reset or
[4] + [6] + BU + ACC
Test Mode In
[CD] or [SOURCE]
Source On
TRK MIN SEC
Power On Power On
(T.Offset is adjusted)
TRK MIN SEC
00 00 00
[3]
(T.Offset is not adjusted)
99 99 99
[2]
RF AMP
Gain switching
GG GG GG
*1
[4]
SPINDLE
Speed switching
SP SP SP
[3]
Focus Close
S curve check
91 91 91
[6]
Focus Mode 
switching
0X 0X 0X
*2
[1]
Tracking Servo
Close
00 00 00
or 99 99 99
00 00 00
or 99 99 99
00 00 00
or 99 99 99
[>]
CRG +
[2]
Self-adjusting
switching *3*8
[<]
CRG -
*8
[BAND]
[BAND]
Power Off
TRK MIN SEC TRK MIN SEC
[BAND]
Power Off
TRK MIN SEC
[BAND]
PowerOff
TRK MIN SEC
TRK MIN SEC
TRK MIN SEC
TRK MIN SEC
TRK MIN SEC
TRK MIN SEC
TRK MIN SEC TRK MIN SEC
TRK MIN SEC
TRK MIN SEC
TRK MIN SEC
TRK MIN SEC
TRK MIN SEC
TRK MIN SEC
TRK MIN SEC TRK MIN SEC
[BAND]
Power Off
TRK MIN SEC
[5]
Gop Mode
Gop Mode switching
OL OL OL
[1]
T.Close & AGC
Applicable servomechanism
?tr ?min ?sec ?tr ?min ?sec
?tr ?min ?sec ?tr ?min ?sec ?tr ?min ?sec ?tr ?min ?sec
[6] [3]
RF AGC /
RF AGC coefficient display
[>]
CRG +
8X 8X 8X
or 9X 9X 9X
8X 8X 8X
or 9X 9X 9X
[<]
CRG -
[2]
T.Balance adjustment /
T.BAL coefficient display
T.Close
Applicable servomechanism
?? ?? ?? ?? ?? ??
?? ?? ??
[1]
F,T,RF AGC 
F.Bias display switching
[3] [6]
CRG/TR jump
value switching
[>]
CRG/TR Jump +
[<]
CRG/TR Jump -
[2]
Tracking Open
?? ?? ??
*7 F,T AGC / F.Bias
RF AGC
8X 8X 8X
or 9X 9X 9X
Tracking Open
8X 8X 8X
or 9X 9X 9X
[2]
 6
*5 *4 *4
Operation 
[Key] Test Mode 
[BAND] Power On/Off 
[>] CRG + / TR Jump + 
(Direction Of the external surface) 
[<] CRG - / TR Jump - 
(Direction Of the internal surface) 
[1] T. CLS & AGC & Applicable servomechanism / 
AGC,AGC display setting 
[2] RF Gain switching / Offset adjustment display /
T.Balance adjustment / T. Open 
[3] F. Close,S Curve / Rough Servo and RF AGC /
F,T,RF AGC 
[4] 
 
[5] Error Rate measurement 
ON : ERR 30Counts Start 
BER display data[%] 
[6] F. Mode switching / Tracking Close / CRG•TR 
Jump Switching 
*) • After the [Eject] key is pressed keys other than the [Eject] key should not be pressed, until disc ejection is complete.
• When the key [2] or [3] is pressed during the Focus Search, the power supply should be immediately turned off (otherwise the lens 
sticks to Wall, causing the actuator to be damaged).
• In the case of TR jump other than to 100TR, the function shall continue to be processed even if the TR jump key is released. As for 
the CRG Move and 100TR Jump, the mechanism shall be set to the Tracking Close mode when the key is released.
• When the power is turned on/off the jump mode is reset to the Single TR (91) while the gain of the RFAMP is reset to 0 dB. At the 
same time all the self-adjusting values shall return to the default setting.
*1) TYP → + 6 dB → + 12 dB
 TRK MIN SEC TRK06MIN06SEC06 TRK12MIN12SEC12
*2) Focus Close → S Curve check setting → F EQ measurement setting
 TRK00MIN00SEC00 TRK01MIN01SEC01 TRK02MIN02SEC02
 (TRK99MIN99SEC99)
*3) F.Offset Display → RF.Offset → T.Offset Display → Switch to the 
 order of the original display
*4) 1TR/4TR/10TR/32TR/100TR
*5) Single → 4TR →10TR → 32TR → 100TR → CRG Move
9x(8x):91(81) 92(82) 93(83) 94(84) 95(85) 96(86)
*6) Only at the time of CRG move, 100TR jump
*7) TRK/MIN/SEC → F.AGC → T.AGC → F.Bias → RF AGC
*8) CRG motor voltage = 2 [V]
- Flow Chart
DEH-1850/XN/ES 395 6 7 8
C
D
F
A
B
E
1 2 3 4
6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT
REFO1E
F
• Note :
The grating angle of the PU unit cannot be adjusted after the PU unit is changed. The PU unit in the CD mechanism 
module is adjusted on the production line to match the CD mechanism module and is thus the best adjusted PU 
unit for the CD mechanism module. Changing the PU unit is thus best considered as a last resort. However, if the 
PU unit must be changed, the grating should be checked using the procedure below.
• Purpose :
To check that the grating is within an acceptable range when the PU unit is changed.
• Symptoms of Mal-adjustment :
If the grating is off by a large amount symptoms such as being unable to close tracking, being unable to perform 
track search operations, or taking a long time for track searching.
• Method :
• Measuring Equipment
• Measuring Points
• Oscilloscope, Two L.P.F.
• E, F, REFO1
• Disc • TCD-782
• Mode • TEST MODE
• Checking Procedure
1. In test mode, load the disc and switch the 3V regulator on.
2. Using the → and ← buttons, move the PU unit to the innermost track.
3. Press key 3 to close focus, the display should read "91". Press key 2 to implement the tracking balance 
 adjustment the display should now read "81". Press key 3. The display will change, returning to "81" on the 
 fourth press.
4. As shown in the diagram above, monitor the LPF outputs using the oscilloscope and check that the phase 
 difference is within 75° . Refer to the photographs supplied to determine the phase angle.
5. If the phase difference is determined to be greater than 75° try changing the PU unit to see if there is any 
 improvement. If, after trying this a number of times, the grating angle does not become less than 75° then the 
 mechanism should be judged to be at fault.
• Note
Because of eccentricity in the disc and a slight misalignment of the clamping center the grating waveform may be 
seen to "wobble" ( the phase difference changes as the disc rotates). The angle specified above indicates the 
average angle.
• Hint
Reloading the disc changes the clamp position and may decrease the "wobble".
100kΩ
390pF
100kΩ
390pF
E
VREF
F
VREF
Xch Ych
L.P.F.
L.P.F.
Oscilloscope
CD CORE UNIT(S10.5)
DEH-1850/XN/ES40
1 2 3 4
C
D
F
A
B
E
5 6 7 8
Grating waveform
45°
0°
75°
60°
30°
90°
Ech → Xch 20mV/div, AC
Fch → Ych 20mV/div, AC
DEH-1850/XN/ES 415 6 7 8
C
D
F
A
B
E
1 2 3 4
6.3 ERROR MODE
- Error Messages
If a CD is not operative or stopped during operation due to an error, the error mode is turned on and cause(s) of 
the error is indicated with a corresponding number. This arrangement is intended at reducing nonsense calls from 
the users and also for facilitating trouble analysis and repair work in servicing.
(1) Basic Indication Method
1) When SERRORM is selected for the CSMOD (CD mode area for the system), error codes are written to DMIN 
(minutes display area) and DSEC (seconds display area). The same data is written to DMIN and DSEC. DTNO 
remains in blank as before.
2) Head unit display examples
Depending on display capability of LCD used, display will vary as shown below. xx contains the error number.
8-digit display 6-digit display 4-digit display
ERROR–xx ERR–xx E–xx
(2) Error Code List
Code Class Displayed error code Description of the code and potential cause(s)
10 Electricity Carriage Home NG CRG can't be moved to inner diameter.
SERVO LSI Com- CRG can't be moved from inner diameter.
munication Error → Failure on home switch or CRG move mechanism.
Communication error between microcomputer and SERVO LSI.
11 Electricity Focus Servo NG Focusing not available.
→ Stains on rear side of disc or excessive vibrations on REWRITABLE.
12 Electricity Spindle Lock NG Spindle not locked. Sub-code is strange (not readable).
Subcode NG → Failure on spindle, stains or damages on disc, or excessive vibrations.
A disc not containing CD-R data is found.
Turned over disc are found, though rarely.
CD signal error.
17 Electricity Setup NG AGC protection doesn't work. Focus can be easily lost.
→ Damages or stains on disc, or excessive vibrations on REWRITABLE.
30 Electricity Search Time Out Failed to reach target address.
→ CRG tracking error or damages on disc.
44 Electricity ALL Skip Skip setting for all track.
(CD-R/RW)
50 Mechanism CD On Mech Error Mechanical error during CD ON.
→ Defective loading motor, mechanical lock and mechanical sensor.
A0 System Power Supply NG Power (VD) is ground faulted.
→ Failure on SW transistor or power supply (failure on connector).
Remarks: Mechanical errors are not displayed (because a CD is turned off in these errors).
Unreadable TOC does not constitute an error. An intended operation continues in this case.
Upper digits of an error code are subdivided as shown below:
1x: Setup relevant errors, 3x: Search relevant errors, Ax: Other errors.
DEH-1850/XN/ES42
1 2 3 4
C
D
F
A
B
E
5 6 7 8
6.4 SYSTEM MICROCOMPUTERTEST PROGRAM
- PCL Output
In the normal operation mode (with the detachable panel installed, the ACC switched ON, the standby mode cancelled), 
shift the TESTIN IC601(Pin 15) terminal to H. The clock signal is output from the PCL terminal IC601(Pin 14). 
The frequency of the clock signal is 786.432 kHz that is one 16th of the fundamental frequency. The clock signal should 
be 786.432 kHz ± 31.5 Hz. If the clock signal is out of the range, the X'tal (X601) should be replaced with new one.
DEH-1850/XN/ES 435 6 7 8
C
D
F
A
B
E
1 2 3 4
7. GENERAL INFORMATION
7.1 DIAGNOSIS
7.1.1 DISASSEMBLY
- Removing the CD Mechanism Module (Fig.1)
1
Fig.1
- Removing the Case (not shown)
Grille Assy
- Removing the Grille Assy (Fig.1)
1. Remove the Case.
CD Mechanism Module
1
1
1
1
Fig.2Tuner Amp Unit
- Removing the Tuner Amp Unit (Fig.2)
Remove the screw.1
Remove the four screws.
Disconnect the connector and then remove the
CD Mechanism Module.
2 Release the two latchs and then remove 
the Grille Assy.
2 2
1
2
2
2
3 33
Remove the three screws.2
Straighten the tabs at three locations 
indicated and then remove 
the Tuner Amp Unit.
3
DEH-1850/XN/ES44
1 2 3 4
C
D
F
A
B
E
5 6 7 8
A
A
B
B
Upper Frame
Lower Frame
B
B
B
B
a
Damper
Carriage Mechanism
Damper
Do not squeeze this area.
- How to hold the Mechanism Unit
- Removing the Upper and Lower Frames
1. With a disc inserted and clamped in the 
mechanism, remove the two Springs (A), 
the six Springs (B), and the four Screws.
2. Turn the Upper Frame using the part "a" as 
a pivot, and remove the Upper Frame.
3. While lifting the Carriage Mechanism, 
remove it from the three Dampers.
Caution: When assembling, be sure to apply 
some alcohol to the Dampers and assemble 
the mechanism in a clamped state.
1. Hold the Upper and Lower Frames.
2. Do not hold the front portion of the Upper 
Frame, because it is not very solid.
DEH-1850/XN/ES 455 6 7 8
C
D
F
A
B
E
1 2 3 4
Screw
Shorting Solder
CD Core Unit
Solder
Chassis
Pickup Rack
Pickup
Poly Washer Change Arm
Pickup Lock Arm
Feed Screw
Planet Gear
Inner Holder
- How to remove the CD Core Unit
1. Apply Shorting Solder to the flexible cable of 
the Pickup, and disconnect it from the 
connector.
2. Unsolder the four leads, and loosen the 
Screw.
3. Remove the CD Core Unit.
Caution: When assembling the CD Core Unit, 
assemble it with the SW in a clamped state 
so as not to damage it.
- How to remove the Pickup Unit
1. Make the system in the carriage mechanism mode, and have it clamped.
2. Remove the CD Core Unit and remove the leads from the Inner Holder.
3. Remove the Poly Washer, Change Arm, and Pickup Lock Arm.
4. While releasing from the hook of the Inner Holder, lift the end of the Feed Screw.
Caution: When assembling, move the Planet Gear to the load/eject position before setting the Feed Screw in the Inner 
Holder.
Assemble the sub unit side of the Pickup, taking the plate (Chassis) in-between. When treating the leads of the Load 
Carriage Motor Assy, do not make them loose over the Feed Screw.
DEH-1850/XN/ES46
1 2 3 4
C
D
F
A
B
E
5 6 7 8
7.1.2 CONNECTOR FUNCTION DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
B.UP
GND
ACC
NC
NC
B.REMOTE
NC
NC
Pin No.
9
10
11
12
13
14
15
16
RL-
FL-
RL+
FL+
RR-
FR-
RR+
FR+
16 2
115
14
13
12
11
10
9
8
7
6
5
4
3
REAR OUTPUTANTENNA JACK
DEH-1850/XN/ES 475 6 7 8
C
D
F
A
B
E
1 2 3 4
7.2 PARTS
7.2.1 IC
- Pin Functions (PE5518A)
Pin No. Pin Name I/O Function and Operation
1
2,3
4
5,6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23-31
32
33
34
35
36
37
38
39
40
41,42
43
44-46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
MODEL1
NC
AVSS
NC
AREF1
KYDT
DPDT
NC
TUNPDI
TUNPDO
TUNPCK
PCL
TESTIN
BSI
BDATA
BSCK
DORAON
NC
swvdd
ILMPW
NC
DALMON
VSS
BRST
BRXEN
CDRESET
ROMDATA
ROMCLK
ROMCS
RECEIVE
NC
SYSPW
NC
STRKEY2
MUTE
ANTPW
NC
VST
VDT
VCK
NC
TUNPCE2
TUNPCE
RDT
RDSLK
RDS57K
RESET
LDET
RCK
asens
bsens
dsens
source
VSS
VDD
I
I
O
I
O
O
O
I
I
O
O
O
O
O
O
I/O
O
O
O
O
O
O
I
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
Model select input
Not used
GND
Not used
VDD
Display microcomputer data input
Display microcomputer communication data output
Not used
PLL data input
PLL data output
PLL clock output
Clock adjustment output
Test program input
Bus serial data input
Bus serial output data
Bus serial clock output
Not used
Not used
Display microcomputer chip select output
Illumination power output
Not used
Output for dark current reduction circuit / Stand-by mode : L output
GND
Bus reset output
Bus RX enable input/output
CD microcomputer reset signal output
ROM collection data output
ROM collection clock output
ROM collection chip select output
RDS decoder receiving output
Not used
System power output
Not used
Wired remote control input 2
System mute output
Auto antenna control output
Not used
E.VOL strobe output
E.VOL data output
E.VOL clock output
Not used
PLL chip enable output 2
PLL chip enable output
RDS LK input
RDS clock input
RDS 57K input
Reset
PLL lock detection input
RDS clock input
ACC sense input
Back up sense input
Grille detach sense input
Source sense input
GND
VDD
DEH-1850/XN/ES48
1 2 3 4
C
D
F
A
B
E
5 6 7 8
20 41
601
*PE5518A
40
6180
21
1
T
A
B
2
P
-G
N
D
2
3
O
U
T
2
-
4
S
T
B
Y
5
O
U
T
2
+
6
V
C
C
7
O
U
T
1
-
8
P
-G
N
D
1
9
O
U
T
1
+
10
S
V
R
11
IN
1
12
IN
2
13
S
-G
N
D
14
IN
4
15
IN
3
16
A
C
-G
N
D
17
O
U
T
3
+
18
P
-G
N
D
3
19
O
U
T
3
-
20
V
C
C
21
O
U
T
4
+
22
M
U
T
E
23
O
U
T
4
-
24
P
-G
N
D
4
S
W
IT
C
H
25
+ - +-
O
ff
se
t
D
e
te
ct
io
n
+ - +-
O
ff
se
t
D
e
te
ct
io
n
+-+-
O
ff
se
t
D
e
te
ct
io
n
+-+-
O
ff
se
t
D
e
te
ct
io
n
P
ro
te
ct
o
r;
O
v
e
r 
cu
rr
e
n
t 
li
m
it
sw_vcc
stby
P
ro
te
ct
o
r;
S
h
o
rt
 c
ir
cu
it
M
u
te
 c
ir
cu
it
amp_vcc
S
ta
n
d
-b
y
C
ir
cu
it
P
ro
te
ct
o
r;
O
v
e
r 
v
o
lt
a
g
e
sw_vcc
P
ro
te
ct
o
r;
T
h
e
rm
a
lR
e
fe
re
n
ce
a
m
p
_v
cc
PAL007B
69,70
71
72
73
74
75
76
77,78
79
80
X2,1
IC(VPP)
NC
VSS
AVDD
AVREF1
SL
NC
BSRQ
STRKEY1
I
I
I
Crystal oscillator connection pin 
GND 
Not used 
VSS 
VDD 
VDD 
Signal level input 
Not used 
Bus slave service request
Wired remote control input 1
Pin No. Pin Name I/O Function and Operation
IC's marked by * are MOS type.
Be careful in handling them because they are very
liable to be damaged by electrostatic induction.
DEH-1850/XN/ES 495 6 7 8
C
D
F
A
B
E
1 2 3 4
- Pin Layout
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
IN1_L
IN2_L
IN3_L
IN4+_L
IN4-_L
Front_L
Rear_L
Vcc
Vref
GND
IN1_R
IN2_R
IN3_R
IN4+_R
IN4-_R
Front_R
Rear_R
STB
CLK
DATA
- Block Diagram
Is
ol
at
or
Is
ol
at
or
A
ut
o
Z
er
o
G
ai
n
A
dj
us
te
r
Input Selector 
T
R
E
B
A
S
S
LO
U
D
N
E
S
S
S
ec
on
da
ry
V
ol
um
e
F
ro
nt
_R
R
ea
r_
R
F
ro
nt
_L
R
ea
r_
L
A
nt
i-R
ad
ia
tio
n
F
ilt
er
 
A
nt
i-A
lia
s
F
ilt
er
 
P
rim
ar
y
V
ol
um
e
D
ig
ita
l
B
lo
ck
IN
1_
L
IN
2_
L
IN
3_
L
IN
4+
_L
IN
4-
_L
IN
4-
_R
IN
4+
_R
IN
3_
R
IN
2_
R
IN
1_
R
STB
DATA
CLK
GND
Vcc
Vref
M
ID
 
S
ec
on
da
ry
V
ol
um
eS
up
pl
y
&
R
ef
er
en
ce
S
ec
on
da
ry
V
ol
um
e
S
ec
on
da
ry
V
ol
um
e
PML014A
DEH-1850/XN/ES50
1 2 3 4
C
D
F
A
B
E
5 6 7 8
NJM2885DL1-33 BD7802FP
IN
1
GND
2
OUT
3
Bandgap
Reference
Thermal
Protection
+
-
-
+
Vref
321
OUTNCVCC
Driver
OCPTSD
- Pin Functions(PD6340A)
Pin No. Pin Name I/O Function and Operation
1-5 SEG4-0 O LCD segment output
6-9 COM3-0 O LCD common output 
10 VLCD LCD drive power supply
11-14 KST3-0 O Key strobe output
15,16 KDT0,1 I Key data input (analogue input)
17 REW I Remote control reception input
18 DPDT I Display data input
19 NC Not used
20 KYDT O Key data output
21 MODA GND
22 X0 Crystal oscillator connection pin
23 X1 Crystal oscillator connectionpin
24 VSS GND
25,26 KDT2,3 I Key data input
27 NC Not used
28 KST4 O Key strobe output
29-32 NC Not used
33-55 SEG35-13 O LCD segment output
56 VDD Power supply
57-64 SEG12-5 O LCD segment output
* PD6340A
49
48 33
32
17
161
64
DEH-1850/XN/ES 515 6 7 8
C
D
F
A
B
E
1 2 3 4
- Pin Functions (PE5497B)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35-42
43
44
45
46
47-54
55-62
63
64
65
66
67
68
69
70
71
72
73
LD
PD
rst
INTQ
A0
stb
sck
SO
SI
D.VDD
D.GND
REG16
REGS
DA.VDD
ROUT
DA.GND
REGC
DA.GND
LOUT
DA.VDD
ICEMD
X.VDD
xtal
X.GND
XTAL
VPP
C.VDD
C.GND
RESET
IO.GND
IO.VDD
ICECK
INT0
INT2
PA0-7
DOUT
SCKO
LRCK
TX/EMPH
PC0-7
PB0-7
SD2
IO.GND
IO.VDD
FD
TD
SD
MD
TEST
AD.GND
AD.VDD
EFM
O
I
I
O
I
I
I
O
I
O
O
I
O
I
I
I
O
I
I
I/O
O
O
O
O
I/O
I/O
O
O
O
O
O
I
O
Laser diode control current output
Photo diode signal (for detecting laser power) input
Reset (CD block)
Interrupt
Address 0
Strobe
Serial clock
Serial data output
Serial data input
Power supply for digital circuits
Ground for digital circuits
Capacitor connection for regulator (logic)
Capacitor connection for regulator (SRAM)
Power supply for Audio-DAC
R-channel audio signal output
Ground for Audio-DAC
Capacitor connection for regulator (RF amp.)
Ground for Audio-DAC
L-channel audio signal output
Power supply for Audio-DAC
Selected to ICE
Power supply for the crystal oscillator
Crystal connection
Ground for the crystal oscillator
Crystal connection
Programming power supply
Power supply for digital circuits(Power supply for the CPU)
Ground for digital circuits(Ground for the CPU)
Reset
Ground for the digital port
Power supply for the digital port
Clock for ICE
Interrupt
Interrupt
General port A
Data output (audio)
Serial clock output (audio)
LR clock (audio)
Transmit data/Emphasis information output
General port C
General port B
Sled drive
Ground for the digital port
Power supply for the digital port
Focus drive output (PWM)
Tracking drive
Sled drive
Motor drive output (PWM)
Test
Ground for the A/D converter
Power supply for the A/D converter
EFM signal
Pin No. Pin Name I/O Function and Operation
DEH-1850/XN/ES52
1 2 3 4
C
D
F
A
B
E
5 6 7 8
25 51
751
* PE5497B
50
7610
0
26
I/O Function and Operation
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
ASY
ATEST
A.VDD
A.GND
RFI
AGCO
C3T
AGCI
RFO
EQ2
EQ1
RF2-
RF-
A.GND
A.VDD
A
B
F
E
REFOUT
FE-
FEO
ADCIN
TE-
TEO
TE2
TEC
I
O
I
O
I
O
I
I
I
I
I
I
O
I
O
I
I
O
O
I
Slice level
Analog test
Power supply for the analog system
Ground for the analog system
RF signal input
AGC amp output
Capacitance connection for 3T signal detecting circuit
AGC amp input
RF amp output
Equalizer parts connection for RF amp
Equalizer parts connection for RF amp
Impedance connection to RF amp for negative feedback
Impedance connection to RF amp for negative feedback
Ground for the analog system
Power supply for the analog system
Error signal input
Error signal input
Error signal input
Error signal input
Reference output
Impedance connection to focus error amp for negative feedback
Focus error amp output
A/D converter input
Impedance connection to tracking error amp for negative feedback
Tracking error amp output
Tracking error amp output multiplied by two
Tracking error comparator
Pin No. Pin Name
DEH-1850/XN/ES 535 6 7 8
C
D
F
A
B
E
1 2 3 4
- Pin Functions(BA5839FP)
 Pin No. Pin Name Function and Operation
 1 VR Input pin for reference voltage
 2 OPIN2(+) Input pin for non-inverting input for CH2 preamplifier
 3 OPIN2(-) Input pin for inverting input for CH2 preamplifier
 4 OPOUT2 Output pin for CH2 preamplifier
 5 OPIN1(+) Input pin for non-inverting input for CH1 preamplifier
 6 OPIN1(-) Input pin for inverting input from CH1 preamplifier
 7 OPOUT1 Output pin for CH1 preamplifier
 8 GND Ground pin
 9 MUTE Mute control pin
 10 POWVCC1 Power supply pin for CH1, CH2, and CH3 at "Power" stage
 11 VO1(-) Driver CH1 - Negative output
 12 VO1(+) Driver CH2 - Positive output
 13 VO2(-) Driver CH2 - Negative output
 14 VO2(+) Driver CH2 - Positive output
 15 VO3(+) Driver CH2 - Positive output
 16 VO3(-) Driver CH2 - Negative output
 17 VO4(+) Driver CH4 - Positive output
 18 VO4(-) Driver CH4 - Negative output
 19 POWVCC2 Power supply pin for CH4 at "Power" stage
 20 GND Ground pin
 21 CNT Control pin
 22 LDIN Loading input
 23 OPOUTSL Output pin for preamplifier for thread
 24 OPINLSL Input pin for preamplifier for thread
 25 OPOUT3 CH3 preamplifier output pin
 26 OPIN3(-) Input pin for inverting input for CH3 preamplifier
 27 OPIN3(+) Input pin for non-inverting input for CH3 preamplifier
 28 PREVCC PreVcc
BA5839FP
114
15 28
DEH-1850/XN/ES54
1 2 3 4
C
D
F
A
B
E
5 6 7 8
No. Symbol I/O Explain
1 AMANT I AM antenna input AM antenna input high impedance AMANT pin is connected with 
an all antenna by way of 4.7µH. (LAU type inductor) A series circuit 
including an inductor and a resistor is connected with RF ground for 
the countermeasure against the hum of power transmission line. 
2 RFGND RF ground Ground of antenna block
3 FMANT I FM antenna input Input of FM antenna 75Ω Surge absorber(DSP-201M-S00B) is necessary.
4 VCC power supply The power supply for analog block. D.C 8.4V ± 0.3V
5 SL O signal level Output of FM/AM signals level
6 CE2 I chip enable-2 Chip enable for EEPROM ”Low” active
7 NC non connection Not used
8 CE1 I chip enable-1 Chip enable for AF•RF ”High” active
9 CK I clock Clock
10 DI I data in Data input
11 NC non connection Not used
12 OSCGND osc ground Ground of oscillator block
13 ROM_VDD power supply Power supply for EEPROM pin 13 is connected with a power supply of 
micro computer.
14 DO O data out Data output
15 DGND digital ground Ground of digital block
16 NC non connection Not used
17 VDD_3.3 power supply The power supply for digital block. 3.3V ± 0.2V
18 NC non connection Not used
19 NC non connection Not used
20 NC non connection Not used
21 NC non connection Not used
22 AUDIOGND audio ground Ground of audio block
23 L ch O L channel output FM stereo “L-ch” signal output or AM audio output 
24 R ch O R channel output FM stereo “R-ch” signal output or AM audio output 
FMRF
ANT adj
RF adj
FM ANT
T51 CF52
R
FG
N
D
O
S
C
G
N
D
D
G
N
D
A
U
D
IO
G
N
D
N
C
V
C
C
V
D
D
_3
.3
3.3V 2.5V
IC 4
3.3V 2.5V←
IC 2
2.5V
N
C
C
E
2
R
O
M
_V
D
D S
L D
I
C
K
C
E
1
N
C
D
O
N
C
N
C
N
C
N
C
7 6 13 5 10 9 8 11 14 18 19 20 21
1
3
2 12 15 22 16 4 17
IC 1
3.3V
AM ANT FMRF
ATT
LPFOSC
IC 3 EEPROM
5.0V
IC 5
5V 3.3V←
ATT
MIXER, IF AMP DET, FM MPX
24
23
Rch
Lch
- FM/AM Tuner Unit
DEH-1850/XN/ES 555 6 7 8
C
D
F
A
B
E
1 2 3 4
7.2.2 DISPLAY
- LCD(CAW1905)
S
E
G
M
E
N
T
C
O
M
M
O
N
COM 3
COM 2
COM 1
COM 0
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG 9
SEG 8
SEG 7
SEG 6
SEG 5
SEG 4
SEG 3
SEG 2
SEG 1
SEG 0
SEG39
COM 3
COM 2
COM 1
COM 0
DEH-1850/XN/ES56
1 2 3 4
C
D
F
A
B
E
5 6 7 8
7.3 OPERATIONAL FLOW CHART
AREF1, VDD, AVDD, AVREF1=5 V
Pin 7, 68, 74, 75
Power ON
bsens=L
asens=L
bsens
Pin 64
asens
Pin 63
swvdd←L
Pin 21
Source keys 
operative
Completes power-on operation.(After that, proceed to each source operation.)
SYSPW←H
Pin 43
Starts communication with Grille microcomputer.
Source ON
300 ms
300 ms
In case of the above signal, the communication 
with Grille microcomputer may fail.
If the time interval is not 300 msec, the oscillator 
may be defective.
DEH-1850/XN/ES 575 6 7 8
C
D
F
A
B
E
1 2 3 4
8. OPERATIONS
DEH-1850/XN/ES58
1 2 3 4
C
D
F
A
B
E
5 6 7 8
About the fixing screws for the front panel
If you do not operate the Detaching and Replacing
the Front Panel Function, use the supplied fixing
screws and fix the front panel to this unit.
Fixing screw
(CXX1982)
Fixing screw
(CXX1982)DEH-1850/XN/ES 595 6 7 8
C
D
F
A
B
E
1 2 3 4
DEH-1850/XN/ES60
1 2 3 4
DEH-1850/XN/ES 61
5 6 7 8
5 6 7 8
C
D
F
A
B
E
C
D
F
A
B
E
1 2 3 4
Before shipping out the product, be sure to clean the 
following portions by using the prescribed cleaning 
tools:
Portions to be cleaned Cleaning toolsg
CD pickup lenses Cleaning liquid : GEM1004
Cleaning paper : GED-008g p p
- Jigs List
Test Disc
L.P.F.
TCD-782 Checking the gratingg g g
Checking the grating g g g (Two pieces)( )
Name Jig No. Remarks
- Grease List 
Grease
Grease
GEM1024
GEM1045
CD Mechanism Module
CD Mechanism Module
Name Grease No. Remarks
DEH-1850/XN/ES62
1 2 3 4
	SAFETY INFORMATION
	CONTENTS
	1. SPECIFICATIONS
	2. EXPLODED VIEWS AND PARTS LIST
	2.1 PACKING
	2.2 EXTERIOR
	2.3 CD MECHANISM MODULE
	3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
	3.1 BLOCK DIAGRAM
	3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)
	3.3 KEYBOARD UNIT
	3.4 CD MECHANISM MODULE
	4. PCB CONNECTION DIAGRAM
	4.1 TUNER AMP UNIT
	4.2 KEYBOARD UNIT
	4.3 CD CORE UNIT(S10.5)
	5. ELECTRICAL PARTS LIST
	6. ADJUSTMENT
	6.1 CD ADJUSTMENT
	6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT
	6.3 ERROR MODE
	6.4 SYSTEM MICROCOMPUTER TEST PROGRAM
	7. GENERAL INFORMATION
	7.1 DIAGNOSIS
	7.1.1 DISASSEMBLY
	7.1.2 CONNECTOR FUNCTION DESCRIPTION
	7.2 PARTS
	7.2.1 IC
	7.2.2 DISPLAY
	7.3 OPERATIONAL FLOW CHART
	8. OPERATIONS