02 Manual de servicio del Sega Master System II, abril de 1991

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Sega Master System II 
SERVICE MANUAL 
APRIL, 1991 
SEGA ENTERPRISES, L TO. 
OVERSEAS CONSUMER PRODUCTS DIVISION 
TABLE OF CONTENTS 
General 
1. Product Number and Color Specifications 
2. AC Adaptor Specifications 
3. Product Dimensions and Weight 
4. Electrical Specifications 
Repair Procedures 
1. Flowchart for Troubleshooting Fault Locations 
2. Main Unit 
A. Servicing the main unit 
B. Possible symptoms for each fault location 
C. In the event picture appears alone without sound 
D. In the event picture is not present 
E. in the event controls do not respond normally 
3. Software (Card or Cartridge) Malfunctions 
4. Auto Switchboxes 
5. Controller Related 
Diagrams and Parts Lists 
Schematic Diagram for PAL Version 
PCB Parts Location Diagram for PAL Version 
Parts Listtor PAL Version 
Schematic Diagram for RGB Version 
PCB Parts Location Diagram for RGB Version 
Parts List for RGB Version 
p. 1 
p. 1 
p.2 
p.2 
p.3 
p. 4-5 
p.6 
p. 7 
p. 7 
p. 8 
p.9 
p. 10 
p. 10 
p. 11-13 
p. 14-18 
p. 19-21 
p. 22-23 
p.24 
p. 25-26 
1. PRODUCT NUMBER AND COLOR SPECIFICATIONS 
Color 
Territory . Model No. Format System RF Modulator 
America MK-3006 NTSC M 20Q-5118-0 1 or 
200-5115 
Canada MK-3006-22 PAL 8 (VV) 200-5194-02 
Australia MK-3006-03 PAL 8 (VE) 200-5198 
N. Zealand MK-3006 PAL D 200-5139 
China MK-3006-15 PAL G 20Q-5086-02 
Germany MK-3006-18 PAL G 200-5086-02 
France MK-3006-09 PAL RGB NONE 
2. AC ADAPTOR SPECIFICATIONS 
Territory 
America 
Canada 
Australia 
N. Zealand 
China 
Germany 
Parts 
Model No. 
MK-3006 
MK-3006-22 
MK-3006-03 
MK-3006-04 
MK-3006-15 
MK-3006-18 
Diagram Voltage/ 
Number Number 
400-5115 H-0246 
400-5123 H-0249 
40Q-5050 H0133 
40Q-5050 H-0133 
400-5093-91 H-0158-01 
400-5126 
Plug 
Frequency 
AC120V + 10%/ 
60Hz 
AC120V ± 10%/ 
60Hz 
AC240V + 10%/ 
50Hz 
AC240V + 10%/ 
50Hz 
AC220V + 10%/ 
50Hz 
AC220V + 10%/ 
50Hz 
Channel 
3/4 
3/4 
0/1 
2/3 
3/4 
36 
-
A Type 
A Type 
S Type 
S Type 
A Type 
CType 
3. PRODUCT DIMENSIONS AND WEIGHT 
Main Unit Dimensions 
Main Unit Weight 
Packed Dimensions 
Packed Weight 
256 (W) x 172 (D) x 81.5 (H) mm 
790 g 
360 (W) x 216 (W) x 125 (H) mm 
1.7kg. 
Master Carton Dimensions (6 pcs./carton) 450 (W) x 400 (D) x (390 (H) mm 
Master Carton Weight 11.5 kg. (0.072 m3 ) 
4. ELECTRICAL SPECIFICATIONS 
Power 
CPU 
RAM 
V-RAM 
ROM 
Scrolling Screen 
Sprite Screen 
Character Patterns 
Scrolling Directions 
Sound 
AC 220V or 240V, 50Hz 
Z-80A 3.58 MHz 
64 Kbit 
128 Kbit 
1Mbit 
256 x 192 dot 
32 colors displayed from a palette of 64 
64 sprites of 8 x8 dot or 8 x 16 dot on screen 
16 colors displayed from a palette of 64 
Maximum of 448 types 
Horizontal, Vertical, Diagonal 
Three types plus noise 
REP AIR PROCEDURES 
1. FLOWCHART FOR TROUBLESHOOTING FAULT LOCATIONS 
Power switch check 
IC8 OUT +5V check 
Reset circuit check---------1 
XTAL 10.738 MHz output check IC4; pin41 
ICl: pin 6 clock 3.58 MHz check 
IC2: pins 20, 22 pulse IN check 
1 ~3: pins 1, 20, 22, 27 pulse check 
IC5: RGll sigiwl. C. SYNC signal check; Audio signal check 
1C6, IC7: pins 20, 22, 27 pulse check 
IC9: pins 1 to 2,3,4, RGB IN check;' pin 19 to 20, C. VIDEO OUT check 
RF modulator IN check; RF modulator OUT ( + 5 V) check 
2. MAIN UNIT (POWER BASE) 
(A). Servicing the Main Unit (Power Base) 
Parts Test Procedure 
1. IC 8 (LM7805) power 
check. 
(1) INPUT DC 9V 
(2) OUTPUT V cc=DC5V 
2. Power check of ICs 
( 1) Is V cc 5V power present? 
3. Is reset circuit 
operating? 
(1) Use tester to measure 
voltage of JR. Should be 
0-3.6 V (slowly rises). 
4. Is oscillator circuit 
working? 
(1) Pin 41 ofiC4: AC 6 Vp-p; 
10.738635 MHz ±100Hz 
I-I 
9J liS 
\Iv,,.,, 
(2) Pin 33 ofiC 5 clock 
3.579545 MHz ±30Hz 
ruuu Vp-p 
I I 
225.6 Ns. 
(3) Pin 42 ofiC4 
clock:4.43361875 MHz .± 
30Hz 
llJlJlJ~ Vp·p 
I I 
279 Ns. 
Fault Location 
1. IC8 (LM7805) faulty. 
2. Soldering Faulty. 
3. Short Circuit 
4. Printed circuit board (PCB) 
pattern is cut. 
5. POWER switch is faulty. 
6. Heat sink attachment 
faulty. 
1. PCB pattern is cut. 
2. Soldering is faulty. 
1. Capacitor Cl8 faulty. 
2. Soldering faulty. 
3. Resistor R4 faulty. 
l.OSC (53M! faulty 
2. Soldering faulty 
3. PCB pattern is cut 
4. IC 4 is faulty 
5. Frequency exceeds 
allowable deviation. 
NS=I0-9s 
Symptoms 
1. LED doesn't light. 
2. No picture 
1. No picture. 
2. Screen is black. 
1. No picture. 
2. Screen is black. 
1. No picture 
2. Color may be 
monochromatic 
5. Check connectors I. Broken from excessive 1. No picture 
(I) Make visual check of weight. 2. Picture is monochromatic. 
connector pins. 2. Soldering faulty. 3. Characters are unnatural. 
3. PCB pattern is cut. 4. Controls do not respond 
(2) Check for faulty soldering 4. Tenninal plugs are dirty. properly. 
connections 
6. Check button 1. Switch is loose. I. No power voltage 
switches. 2. Soldering faulty. present. 
( 1) Check power button 3. PCB pattern is cut. 2. LED doesn't light. 
switch. 4. Switch is short-circuited. 3. No picture. 
4. Reset occurs 
(2) Check Pause buttons~tch I. Soldering faulty spontaneously. 
2. PCB pattern is cut 5. Characters suddenly 
3. Blade is not parallel with appearabnonnal. 
circuit board. 
4. Switch is short-circuited. 1. Pause doesn't operate 
properly. 
7. Check RF modulator I. PCB pattern is cut. 1. No picture 
(1) Is OUT +5V present? 2. Soldering is faulty. 2. Picture appears dirty. 
3. RF modulator is faulty. 3. No sound. 
4. IN event IC9 is faulty. 4. Much audio noise. 
I. RF modulator is faulty. 1. CH3 appears, but not 
CH4. 
(2) Check channel selector: 2. CH4 appears, but not 
Arc Cl-13 and CH4 ok? CI-13. 
(ll) Possiulc symptoms for each f:mll location 
Fnull Location 
(Contents of mulfunction) 
1. When ICl (Cl,U) is faulty. 
2. When IC2 (OS ROM~ is faulty. 
3. When ICJ RAM is faulty. 
I 4. When IC4 Is fnulty. 
5. When IC5 is faully. 
6. When IC6, IC7 urc faulty. 
- 7. When IC8 Is faulty. 
8. When IC9 is r:aully. 
Symptom 
1. System doc:sn't operate at all. No picture at all. 
l. Since this is the program which operates the system, no pi~:turc 
will appear. · 
2. Depending on the case, a mosaic pattern may appear. 
1. Since this is the unit that temporarily records data, no picture 
will appear. 
2. Depending on the case, a picture may appear, but it i~ easily 
distorted. 
1. Since this IC emits several control signals, no pi~:ture will ap-
pear. 
2. Cont~ollcr may not respond properly. 
3. Pause, reset may not respond properly. 
4. lf no oscillation is present, clock 3.58 MHz is not produ~:cd, 
with result that system docs not operate at all; no picture will 
appear. 
In addition, several control signals arc involved; if fault is prc-
1. sent, system wiiiiiot operate and no picture will appear. 
2. Even if a picture appears, characters may be distorted. 
3. Colors may be improper. 
4 · Sound may appear alone without picture. 
5. Picture may appear alone without sound. 
1. Since these parts arc responsible for temporarily storing color 
data, picture may not appear. 
2. Even if picture appears, colors may be improper. 
3. Characters may be distorted. 
4._ Picture may be move sluggishly or jerkily. 
1. Since this is + 5 V stabilized current, if malfunction is present, 
uniform + 5 V is nol present; system will not operate and no pic-
ture will appear. 
2. LED doesn't light. 
I. Since this part convens the RGB signal to composite moue, a 
malfum:lion will result in no pkture. 
2. [\'Cil if a picture appears. color may be abnormal. 
---·--·-·--·------·----------- -··--·· ··-- __ .. _____ -·-------·-----------------------·-·· 
(C). In the event picture appears alone without sound 
Service Procedures Fault Location 
l. Soldering is faulty. 
I .Is audio signal output from 2. PCB pattern is cut. 
pin 15 of IC5? 3. Q48, Q49, R47 arc faulty 
(I) MAX 300 mVp-p 4. R46 is faulty 
(2) 20 Hz-20kHz 5. IC5 is faulty. 
6. RF modulator is faulty. 
(D) In eventpicture is not present. 
Service Procedures Fault Location 
1. C38, R29 is absent or taulty. 
1. Is video signal present at pin 2. Soldering faulty. 
3 of RF modulaor? 3. PCB pattern is cut. 
2. Is video signal output from 4. RF modulator is faulty (when picture is present on RF). 
pons 19 and 20 ofiC9? 5. IC9 is faulty. 
3. Is RGB signal present at 6. Peripheral parts aroundiC9 are faulty. 
pins 1 ,2,3, and 4 ofiC9? 
·-
~ ~ ~ -~V 
4" ) z. " 
~ ~ z_.t:;-...' 
(E) In eYenl coulrols do nul respond non_nnlly 
Symplom(s) 
1. Game doesn't start. 
2. Button may not respond when 
pressed. 
3. Absolutely no response at all. 
4. Demonstration screen doesn't ap-
pear .. 
5. Switch stays depressed in middle of 
game. 
6. Switch remains fixed in one direc-
tion. 
7. Starts by itself. 
Fnull Localiou(s) 
1. CON2 or CON3 faulty (disconnection) 
2. Soldering faulty. 
3. PCB pattern is cut. 
4. IC is faulty. 
5. EMI filter is faulty. 
6. Resistor 330 ohm is faulty. 
7. Check for continuity between CON2 and CON3 terminals 
and terminals ofiC4. 
1. CON2 or CON3 is faulty (short-circuited) 
2. Soldering is short-circuited. 
3. PCB pallern is short-circuited. 
4. IC4 is faulty. 
3. SOFTWARE 
Software (Card or Cartridge) Malfunctions 
Symptoms 
1. No picture. 
Picture remains monochromatic. 
Picture is mosaic pattern. 
2. Characters arc disrupted suddenly 
in middle of game. 
Reset occurs spontaneously in mid-
dle of game. 
Other abnormal symptoms appear 
in middle of game. 
l~aull Location 
1. Connector (50 pin) is dirty, disconnected, or other connection 
fault. 
2. Soldering faulty. 
3. Short-circuit. 
4. Capacitor is missing or faulty. 
5. IC is damaged from overheating or static electricity. 
1. Connection fault at connector (50 pin). 
2. Soldering faulty. 
3. Capacitor is missing. or faulty. 
4. IC runaway overheating.· 
5. In tlie case of number 4 above, the problem may be rectified by 
adding a capacitor 100PF-180PF at Al3 (address lJ). 
6. IC is faulty. 
4. AUTOSvnTCHBOXES 
Symptoms 
1. No picture. 
Game picture doesn't appear. 
TV picture doesn't appear. 
2. Sound is bad. 
Much audio noise. 
5. CONTROLLER RELATED 
Control pads 
Symptoms 
1. Controller dues not operate. 
Doesn't move as it should. 
Game doesn't start. 
1. Maves spontaneously by itself. 
Switch remains depressed in one 
direction. 
Iaull Location 
i. Cable is cut or shorted. 
2. Plug is faulty. 
3. Soldering is faulty on cable connection terminal. 
4. PCD paltern is broken or interrupted. 
5. Auto-switcher unit is faulty. 
1. Cable is cracked. 
2. Soldering faulty. 
3. Plug connection is faulty. 
4. Auto switcher is faulty (adjustment faulty). 
Fault Location 
1. Cable is cut. 
2. Faulty connection at connector. 
3. PCD pattern is cut. 
4. Conductive rubber is faulty. 
5. Soldering faul_ty. 
1. Cabl!= is shorted. 
2. Solder is greasy. 
3. Conductive: rubber is stuck. 
Parts List For Master System II PAL Version 
LOCATION PART NUMBER DESCRIPTION 
ACADAPTOR 400-5130 AC ADAPTOR AC240-/DC 9V 0.5A (Australia) 
ACADAPTOR 400-5126 AC ADAPTOR AC 220V/DC9V 0.5A (Europe) 
ACADAPTOR 400-5129 AC 240V/DC9V 0.5A (UK) 
RF.MOD. 200-5091-A RF MODULATOR UB 3622 (I-PAL) 
RF.MOD. 200-5198 RF MODULATOR VE 3423{B-PAL VE) 
RF.MOD. 200-5086 RFMODULATOR UE3622 (G-PAL) 
610-5127 ASSY CONTROL PAD 3020-03 
610-5128 ASSY RF SW BOX WJRF CABLE 
671-1215 SUPPORT BOARD MS2 MULTI 
601-6681 STYROFOAM MS2 MULTI lJR 
671-1155 BOXC MS2 BLACK MULTI 
671-1156 MA CTN MS2 MULTI 
672-0228 INSTR MANUAL M4 JR. MULTI 
253-6426-01 BOTTOM CASE M4 JR. BLACK PAL 
250-5185 TOP SHIELD M4 JR. 
250-5186 BOTTOM SHIELD M4 JR. 
253-6425 TOP CASE M4 JR. BLACK 
253-6352 DOORM4JR. 
253-6427 PAUSE SW MR JR. BLACK 
253-6428 POWER BUTTON M4 JR. BLACK 
PCB 171-5922A PC BD M4JR PAL 
HOLDER 250-5187 HOLDERM4JR 
CN1 209-5023 EDGE CONN SOP PSB4D25S-4Rl 
CN2 209-5017 D-SUB CONN 9P I 
CN3 209-5017 D-SUB CONN 9P _\ 
CN4 212-5004 PIN PLUG FOR DC/NP UC-0056 #1 
POWERSW 509-5240-0 l SLIDE SW HSW1699-0l-010 
PAUSESW 509-5207 TACT SW SKEV AA 
PAUSESW 510-5019 TACTILE PUSH SW SKEV AA 
IC1 315-0041 ICZ80A 
IC2 MPR-12808 IC OS 1M MASK M4 JR 
IC3 315-0298 IC UPD4168C-20 
IC4 315-5237 IC GA UPD65005C-114 
IC5 315-5246 IC CUSTOM CHIP UPD9004G 
IC6, IC7 315-0298-15 IC UPD4168C-15 
IC8 313-0092 ICMA7805UC 
IC9 313-5067 ICCXA1145P 
D1 481-0 14'9-0 1 DIODE IS2473 
D2 481-5038-01 DIODE ISR-35-lOOA 
L1 180-5033 PEAKING COIL 12 UH 
L2, L3 180-5032 PEAKING COIL IOOUH 
R1, R2 479-0472 RES 4.7 KOHM l/6W 
R9 479-0472 RES 4.7 KOHm 1/6 w 
Rl1, R22, R24, 479-0102 RES IKOHM l/6W 
R25 
R4 479-0104 RES 100 KOHM 1/6 w 
R5,R6 479-0331 RES 3300HM V6W 
R7, R8 479~0331 RES 3300HM 1/6W 
RIO 479-0332 RES 3.3KOHM 1/6W 
Rl2, Rl4, Rl6, 479-0822 RES 8.2 KOHM V6W 
R28 
R13, Rl5, R17 479-0821 RES 8200HM 1/6W 
R18, R20, R29 479-0222 RES 2.2KOHM l/6W 
Rl9, R30 479-0152 RES 1.5 KOHM V6W 
R21 479-0202 RES 2KOHM V6W 
R26 479-0273 RES 27KOHM 1/6W 
R27 479-0103 RES IOKOHM V6W 
C1, C2, C3, C4, 151-0126 CAPCER 82PF 50Y 
C5, C6, C9, CIO, 
C11, C12, C13, 
C25, C53 
C7, C8, C19, C23, 151-0020 CAPCER 33PF 50V 
C45, C46, C47, 
C48,C49 
C14, C17 151-0021 CAPCER 20PF 50Y 
C15 151-0002 CAPCER 100PF 50Y 
Cl6, C21, C22 151-0018 CAP CERRA 150PF 50Y 
CIS, C32, CEI, 150-0023 CAPE 10UF 16Y 
CE2, CE3, CE4, 
CE5, CE6 
C20, C50 151-0072 CAPCER 51PF 50Y 
C24 151-0156 CAPCER 270PF 50Y 
C26,34 151-0011 CAPCER 0.01 UF 50Y 
C27, C28, C29, 151-0060 CAPCER 0.1 UF 16Y 
C39,C40,C54 
C30 151-0075 CAP CERRA 180PF 50Y 
C31 150-0009 CAPE 1UF 50Y 
C33, C35 151-0190 CAPCER 12PF 50Y 
C36 151-0159 CAP CERRA IOOPF 50Y 
C37 151-0172 CAP CER 180PF 50Y 
C38,C42,C43 150-0047 CAPE IOOUF lOY 
C41 150-0059 CAPE lOOUF 16Y 
C44 150-0062 CAPE 47UF JOY 
C51 151-0287 ·. CAPCER 27PF 50Y 
C52 151-0079 CAPCER 47PF 50Y 
CP1, CP2, CP3, 151-0170 CAPCERAX 0.022UF 16Y 
CP4, CP5, CP6, 
CP7, CP8, CP9, 
CPIO, CPll, 
CP12, CP13 
FBI, FB2, FB3, 271-0005-1 BEADS INDUCTOR FBA04YA600YB-OO 
FB4, FB5, FB6, 
FB8, JV, JG 
FB7 270-5027 LINE FILTER 
FB9, FB10 270-5035 LINE FILTER FBR07HA121 
EMil, EMI2, 271-0007 EM! FILTER STX222MB 
EMI3,EMI4, 
EM15, EM16, 
EM18, EM21, 
EM22,EM23, 
EM24,EM25, 
EM26,EM28 
EMI7,EM27 271-0006 EMI FILTERSTB271KB 
osc 230-5058 OSC 53.203424M 20PPM 
RAJ 477-0005 RES PACK 8*4.7K (RA8-4728K) 
GRS 601-0076 TML JNT CMPD 200G!fUBE (AMI COM) 
Parts List For Master System II RGB Version 
LOCATION PART NUMBER DESCRIPTION 
610-5127 ASSY CONTROL PAD 3020-03 
400-5048Y AC ADAPTOR AC220V /DC9V lA 
610-0130 RGB BOX FRANCE 
671-1215 SUPPORT BOARD MS2 MULTI 
601-6681 STYROFOAM MS2 MULTI lJR 
671-1155 BOXMS2 BLACKMULTI 
671-1156 MA CTN MS2 MULTI 
672-02~8 INSTRMANUAL M4 JR. MULTI 
253-6426-02 BOTfOM CASE M4 JR. BLACK RGB 
250-5185 TOP SHIELD M4 JR. 
250-5186 BOITOM SHIELD M4 JR. 
670-0835 SEAL SER. NO. M4 JR. RGB 
253-6425 TOP CASE M4 JR. BLACK 
253-6352 DOORM4JR. 
253-6427 PAUSE SW MRJR. BLACK 
253-6428 POWER BUTION M4 JR. BLACK 
PCB 171-5926A PCBDM4JRVA1 
CN1 209-5023 EDGE CONN 50P PSB4D25S-4Rl 
CN2, CN3 209-5017-01 D-SUB 9P ANGLE TYPE UC-0060 #2 
CN4 221-5004 PIN PLUG FOR DC/NP UC-0056# 1 
CN5 212-5106 DIN CONN B-TYPE UC-0059#2 
POWERSW 509-5240-01 SLIDE SW.HSW1699-01-010 
PAUSESW 509-5207 TACT SW SKEV AA 
PAUSESW 510-5019 TACTILE PUSH SW SKEVAA 
IC1 315-0041 ICZ80A 
IC2 MPR-I2808 IC OS IM MASK M4 JR 
IC3 315-0298 IC UPD4I68C-20 
IC4 315-5216 i:>~~~ IC CUSTOM CHIP G/A 
IC5 315-5246 IC CUSTOM CHIP UPD9004G 
IC6, IC7 315-0298-15 IC UPD4168C-15 
IC8 3I3-0092 ICMA7805UC 
DI 481-0 I49-0 I DIODE 1S2473 RADIAL 
D2 481-5038-0 I DIODE 1SR-35-100ARADJAL 
Rl, R2 479-0472 RES 4.7 KOHM 1/6W 
R3 479-0104 RES 100KOHM 1/6 w 
R4 479-0472 RES 4.7 KOHM 1/6W 
R5,R6 479-0331 RES 3300HM l/6W 
R7, R8 479-033I RES 3300HM l/6W 
R59 479-0152 RES 1.5 KOHM l/6W 
R60, R61 479-0222 RES 2.2 KOHM 1/6W 
CI 150-0062 CAPE 47UF lOY 
C2 150-0023 CAPE IOUF 16V 
C3, C4 151-0279 CAPCER 56PF 50V 
C50 150-0059 CAPE 100UF 16V 
C51, C52 I50-0060 CONN 0.22MF 16V 
C53, C54 150-0047 CAPE lOOUF 10V 
C55 151-0060 CAPCER 0.1UF 16V 
C61 151-0075 CAP CERRA 180PF 50V 
C72 151-0159 CAP CERRA 100PF50V 
CP1, CP2, CP3, 151-0170 CAPCERAX 0.022UF 16V 
CP4, CPS, CP6, 
CP7, CPS, CP9, 
CE1, CE2, CE3, 150-0023 CAPE 10UF 16V 
CE4, CE5, CE6 
FBI, FB2, FB51, 271-0005-1 BEADS INDUCTOR FBA04V A600VB-OO 
FB55, FB56, 
FB67, JV, JG, 
JPR, JPG, JPB, 
IPS, 
X'TAL 230-0046-1 XTAL 10.738635 
EMil, EM12, 271-0007 EMIFILTER STX222MB 
EM13,EM14, 
EM15, EM16, 
EM18, EM21, 
EM22, EM23, 
EM24, EM25, 
EM26,EM28 
EM17, EM27 271-0006 EMI FILTER STB27 U<B 
JP1 600-5061 JUMPER WIRE 5MM 
HOLDER 250-5187 HOLDERM4JR 
GRS 601-0076 TML JNT CMPD 200G!fUBE (AMI CON) 
S-LOCK 090-0012 SCREW LOCK 
CN2L, CN2R, 012-0306 TAP SCR PH 3*6 
CN3L, CN3R 
7805-HOLDER 029-0214 S-TITE SCRPHM3*8 
CN1L, CN1R 048-0001 EYLET3.5*7 
DINHOLDER 250-5013 DIN CONN HOLDER 
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07 
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05 
04 
03 
02 
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16 
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12 
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19 
18 
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15 
13 
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1 1 fer res 1 
I n ve:::: 18. 40 
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:!.Ou L'_..·l C?7 I . 0 .022'-l 
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I /77 L _____ .. _________ .J 
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I CE2 I+ i 
: 10u LJ ~~~22•J 
I l 
: rh 
L---------------~ r---------------, 
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r77 
~---------------.J 
1- - - - - - - - - - - - - - - - , 
: vel:: Bypass CAP : 
fer res 
vee: 29 
~~ GND: 14 
CE 5 _!=__+ _j_ 
10u u C?!2 rh 0 .022o 
~---------------_! r---------------, 
1 vee 1 d Bypass C.l.P I fer IC7· I VCe:2S I 
GND: 14 1 c::s __ 1 
:!.Ou u/ CP13 11 rh o .022o 
~---------------~ ----------------, 
I 
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for zcg· 
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GNO: 1. 24 
C54 
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SEGA EHTER?RISES,LTD. 
APR. ~ "'- I %1 r J o 
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THIS D•~'H!~Cl Wll.l. IN NO Wn a! COP I EO. ~Oi7?!1~ Cl(':l l~ttl/~ /J I - ''J;) 
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CONT 1 p:~ !>VCC · I 1 ~ 
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071~ ;§)~~ SEGA ENTERPRISES,LTC. API!. •l'--iL I 1111 '1 0 I -ASS'Y 
I 
rT7 
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t= DESCRIPTION 
SHE!T 2. 0, 3 
vee 
AV 0 •• 4 AV r Al 
R12 
R13 
R14 
R15 
R16 
R17 
R18 
R20 
2.21< + 
R18 271< 
C26 
O.Oiu 
c••l 0.1u 
C25 
82p 
VDD FB4 VRF 
t ryyy-, T 
FBA04 
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GND vss 
res 
2 RIN 
3 GIN 
4 BIN 
10 SYNei 
B AUDIO I 
7 NTSe/PAL 
5 XOUT 
6 XIN 
IREF 
4 VREF 
CXA1145? 
ROUT 
GOUT 
·eouT 
SYNeO 
AUDIOO 
VIDEO 
YOUTYIN 
CIN 
COUT 
L1 
12u 
FB6 
R28 8.21< 
23 FBA04 
C38 100u R29 
• t-----+--"V'V"----, 
18 
C34 
RF MOO 
Vee (VRF): 1p 1n 
GND: CASE 
R-29 is 33 ohns for PA1,-B (VE), 
* 1 : 2. 2 Kohms for other ve:~sions. 
17 t--=.....------111---, C37 
*2: R-21 is 75 ohms for PAL-B (VE), 
2 Kohrns for other vers~ons. 
15 
O.Oiu +----1~BOoC~ 
R25 
11< 
C36 
100pCH 
R24 
11< 
R22 
11< 
~~~ SEGA ENTERPRISES,LTD. 
l}!IS DIIAWINQ WILl. IH H0 WAY 8! COI'I£0. IT~:T?U~ 
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.APR. -Jt~ '71· , f () 
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DIIW. M-111:: !C•/;;·'9c 
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SHUT 3 01' 3 
A c . 
CN41~..-__ _. 
2 
( ,., .. ·-
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ICO 
4 
6 
15 IC7 
POWER.SW 
7 
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I 
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G H 
0.022p 
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MACHINE •tct; SUB·ASS'Y •Clla 
610-S/4~ 
AlTERATIONS 
DETAILED DRAWING 
(View from Soldering Side) 
Connect C39 and GND 
for IC9 with a 
jumper wire as 
shown above. 
.· 
I 
% 
. . .s 
JCO 
ll 
A 
CN41.._ ----' 
> ~ ..., ..., 
'-1 VI 
~~~~~~ 
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POWER.SW 
B· 
. I 
15 
c D 
Land near.CXA1145 
is the positive 
side. 
CE~+~P~+ O.O!lf CP 
H o · fit H a-
~'-' .,......._, co . I N .... -- .... 
.N u 
VI 
0 
CSI..2'1p !D ..,.... ~ 
if' .... .... 11-~p-
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w4.'1" &t ~- H33p 
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M 
u 
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·W *-.'1" 
. Rl " 
E F ~ 
--=-----~------~-------~----- H 
IC. 80 .H4Jf? 
DETAILED DRAWING 
(View from soldering side) 
Connect C39 and GND for 
IC9 with jumper wire as 
above. 
.• ._ ...... ,. =rt1 
••m-.·--
. ___ ..:__::<-.J ____ ._c_ ____ -'-'K, _________ J,_ ___ _ 
.·~: . . . .,. 
. • . .•. !· "'·: 
2 
3 
JCO 
6 
-·o-
1 
~ 
8 . I 
CN41 ...... __ I . 
15 
POWER .Sf/ 
IC7 
c . 
,-..... + o. 021p 
*'0-t H '-" CE CP 
"-----------· ··-; 
) 
c F 
u 
C24 
-1 f 21)0p IC5 
Land near.CXA1145 
is the posit.ive 
side. 
.G H 
10 O..OZ2p /0 ().O"~ 
CE..-2:..+ CP C~+ CP-r 
o · a ~• e ~• 
"¢ .........._, co .........._, co 
I N ~.....-:..C\1 .. 
c 
N 
M 
u 
!!! "<r... ----
~p~ ~~Ej>CB 
H33p _-w I.J..'1k 
C45 . Rl 
C14 
-~·20p RAI 
J 
~ACHINE a111.~ 
0~ 
r~~~;tf-! e a o 
DETAILED DRAWING 
(View from soldering side) 
Connect C39 and GND for 
IC9 with jumper wire as 
above. 
IllS IL\WIII 1111. • II Jll X t:rD. 
ft X l(fHKJ II JCLIU. 
:LC BD H4J"R: PAL- 8 CVE) 'l37 -'737/ (D-~) 
0 E S C R I P T I 0 N · ~It: PART NO. !iU • &.:.•tt 
2 
6 
7 
~ 
w· 
""'? 
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Vf. 
\li" 
~ 
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~ 
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c N 41L.. _ ___.I . 
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~~~~~~ 
CD CO 
POWER.SW 
pPD4/ bf! -/!; 
IS IC7 
0 
2 
Ua.. 
_i::;;32 ,.. 
so 
Cl9 
-~·33p. 
E F 
Land near CXA1145 
is the positive 
side. 
.G H 
HEpCB 
·W 4.'1}( 
. Rl 
DETAILED DRAWING 
(View from soldering side) 
Connect C39 and GND for 
IC9 with jumper wire as 
above. 
6 
A . I 0 
CN41,_ _ __.I . 
2 
3 
ICO 
4 
5 
6 
IS IC7 
POWER.SW 
7 
~ 
"J 
::J 
.:::. 
'.J 
..._ 
:") 
' I 
\J 
::-
A B c 0 
E F 
u 
Land near CXA1145 
is the positive 
side • 
E F 
G H 
. 0 022p /0 0.022p 
CE~+ (:p c~+ cP 
o·* H U H 
~ ..._, co ......._, co 
~ I N_ --C\.1 
G 
T 
0 
N 
H 
DETAILED DR~WING 
(View from soldering side) 
Connect C39 and GND for 
IC9 with jumper wire as 
above. 
K 
18. 
A 8 
2 
780'5 
I 3 
I I I 
ICO 
4 
-
-
6 
c 
CN41 L.. ~~~ 
U) !;; 
> Cl In CD 
-, -, ~ "" 
~+ 
C54 if- ~ 
'-' t"( ,. 
·UO.Llc. l.l 
ICB C55 inl~ 
C52 m 
·HO.I~ u.. 
C51 
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~ 
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C\1 crcr 
. 
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SEGA :ENTERPRISES, LTC. 
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MACHINE IIUU I SUB-ASS"Y l!::.ll~ 
/JO-Si.Y, 
ALTERATIONS o!:tU 
liiS ftliiRS llll II "' 'Ill II Clfi!U. 
Tilt 1£1111!1 II DOIIII. 
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- 5 
-
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LIMITS UNLESS OTHERWISE SPE¢1FIED '' -· 3RDOUAT.PROJ.D11Awi/OG ;Ji"'Jti!: a:Hlf~ II! Ell II!~ if< :: 
~ ~:\~~! l ~ ;f;M:~ '~.i I.f'~ 
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MATERIAL tm HEAT TREAT. ~:Ill'! FINISH lUi Ill~ REMARK $t"l;:t,;: T RE'I. 
	Sega Master System 2 1 of 2 A4_Page_01
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