Sega Master System Service Manual
Contents
1. PARTS NO PARTS FOB PRICE 400 5048Y AC ADOPTER 2767 400 5056 AC ADOPTER UK 1 560 400 5057 AC ADOPTER HK X794 271 0005 BEADS INDUCTOR FBA04VA600AD X6 271 0005 1 BEADS INDUCTOR FBAO4VAGOOVB 7 610 0030 BOTTON CASE ASSY PB 319 253 6008 BUTTON PB 18 151 5004 CAP CER TRIMMER 30pF 515 209 5020 CARD CONNECTOR 35 HACERTE 1 X148 610 0180 CONTROL PAD ASSY X429 209 5017 01 D SUB ANGLE TYPE UC 006092 X43 212 5106 DIN CONN 8P B TYPE UC 005912 X51 481 0149 DIODE 152473 4 481 5038 DIODE 1SR 35 100A 10 481 5045 DIODE 155133 _ 209 5023 EDGE CONNECTOR 50 PSB4D25S 4RI 127 271 0006 EMI FILTER 5 271 512 271 0007 FILTER STX222HB 512 314 0355 74 L5174 505 314 0356 IC 14 5115 95 314 0358 _ IC 74ALS74 X58 7314 030 IC 14160132 315 5210 IC 5101 216 315 5124 IC CUSTOW 182 7313 5007 IC CXA 8 1188 X342 HPR 10883 CXK3804P X241 313 0092 IC em 48 315 0298 15 IC UPD4108C 15 422 7315 0298 IC UPD4108C 20 417 HPR 11458 IC uPD23C1011 FOR HS 3091 45 11459 IC uPD23C1011 FOR HS PLUS 3090 X634 MPR 11460 IC uPD23Ci011 FOR SS 3095 X630 315 0041 280A 172 501 6057 INDIVIDUAL DOX BS FIVE 3080 170 671 0116 INDIVIDUAL BOX HS FIVE 3095 170 671 0114 INDIVIDU2. Parts Test Procedure Fault Location Symptoms 6 Check button switches 1 Switch is loose 1 No power voltage present 1 Check power button switch 2 Soldering faulty 2 LED doesn t light 3 PCB pattern is cut 3 No picture 4 Switch is short circuited 4 Reset occurs spontaneously 5 Characters suddenly appear abnormal 2 Check reset button switch 1 Soldering faulty 1 Reset doesn t respond proper 3 Check pause button switch 2 PCB pattern is cut ly 3 Blade is not parallel with cir 2 Pause doesn t operate proper cuit board ly 4 Switch is short circuited 7 Check RF modulator 1 Is OUT 5 V present 5 1 15 2 Soldering faulty 3 RF modulator is faulty No picture Picture appears dirty No sound Much audio noise mus RF modulator 2 Check channel selector Are and CH4 okay 1 RF modulator is faulty 1 CH3 appears but not CH4 2 CH4 appears but not CH3 1 Various problems are con 1 No picture ceivable In event system is not operating at all 2 In event 1 9 is faulty 8 Check CON 1 1 R23 DC 1 3 V VIDEO without load 2 6 5 8 DC 1 9 V RGB without load Possible symptoms for each fauli location Fault Location Contents of malfunction Symptom 1 When 1 1 CPU 15 faulty 1 System doesn t operate at 81 No picture at 811 2
3. w L IC BOARD PR DA vas
4. 4 22 ex 222 PPH 20 2449 14 re PPIE 1S u 2 214 ATA 4 2 PAY 47 CSTNC 424 15 5216 LCS 315 5124 hos PENTEL OM 631 gt SEEN seca ENTERPRISES LTD a 2177 m un x 52522 gt 2 gt gt X X XX DI gt 8 1 2 34 4 RAM 5 4x8 2 004 6 lt 2 t 5 2 8 GND SMTA e 2202204 NY 1 2561307 4 2 RIS ticis 100 js ask m m m ALSITY ALSITS ALS 4 ALS IS in 1 1 3 1612 163 ux Jo E8069 ASS 1 333418 LD SINE in C SYNC VII 1166 HEAT SINK 51977 2 A GNDAL IA 1 221329 5 ARR CHM Dorey TEAS CN1G CNA 5 VIDEO 1 a DEI 089 Le SRN 22k AUDIO O Lesz 220p EGA seca ENTERPRISES LT
5. Capacitor is missing or faulty IC is damaged from overheating or static electricity 2 Characters are disrupted suddenly in middle of game Reset occurs spontaneously in mid dle of game Other abnormal symptoms appear in middle of game C RUM e Connection fault at connector 50 pin Soldering faulty Capacitor is missing or faulty IC runaway overheating In the case of number 4 above the problem may be rectified by adding a capacitor 100PF 180PF at A13 address 13 IC is faulty 3 Auto Switchboxes and Cables a Auto switchbox Symptoms Fault Location Cable is cut or shorted Plug is faulty Soldering is faulty on cable connection terminal PCB pattern is broken or interrupted Auto switcher unit is faulty 1 No picture Game picture doesn t appear TV picture doesn t appear gt Cable is cracked Soldering faulty Plug connection is faulty Auto switcher is faulty adjustment faulty 2 Sound is bad Much audio noise Pen b Video Cable Symptoms Fault Location 1 No picture 1 Cable or plug is faulty replace all No sound AC adaptor Symptoms Fault Location 1 No picture 1 Replace 2 LED doesn t light 3 13 V 1 V not produced without load 4 Controller Related Control pads Symptoms Fault Location 1 Cable is c
6. PCB pattern is short circuited 4 IC4 is faulty b In event picture appears alone without sound Service Procedures 1 Check whether audio signal is pre sent between pins 1 and 2 of CONI When a mini speaker or earphone is connected sound can be heard 15 audio signal output from pin 10 of ICS 1 MAX 300 mVp p 2 20 Hz 20 kHz 2 c In event picture is not present Service Procedures 1 Is video signal present between pins 3 and 2 of CNI Is video signal present at pin 3 of RF modulator 3 Is video signal output from pins 19 and 20 of IC9 Is RGB signal output from pins 23 22 and 21 of IC9 5 Is RGB signal present at pins 1 2 and 3 of 1C9 Fault Location 1 is faulty 2 Soldering faulty 3 PCB pattern is cut 4 Q48 C49 R47 are faulty 5 R46 is faulty 6 IC5 is faulty 7 RF modulator is faulty Fault Location 1 C28 R27 is absent or faulty 2 CNI is faulty 3 Soldering faulty 4 PCB pattern is cut 5 RF modulator is faulty when picture is present on RF 6 1 9 15 faulty 7 Peripheral parts around 1 9 are faulty 2 Software Software Card or Cartridge Malfunctions Symptoms Fault Location 1 No picture Picture remains monochromatic Picture is mosaic pattern gt Connector 50 pin is dirty disconnected or other connection fault Soldering faulty Short circuit
7. 50 V CH TYPE E 180 5032 100 02 1 479 0102 RES 1 KQ 1 6 W x 59s 1 151 0058 0 01 uF 16 V 1 479 0222 RES 2 2 KQ 1 6 W 5 1 482 0261 XSTR 2SC1740 R or Q 1 479 0103 RES 10 9 1 6 W 5 1 150 0023 CAP E 10 uF 16 V U TYPE 1 151 0058 0 01 uF 16 V 1 481 5045 DIODE 155133 152473 1 481 0149 479 0472 RES 4 7 1 6 W 5 1 479 0472 RES 4 7 KQ 1 6 W 5 1 151 0060 0 1 pF 16 V 1 151 0060 CAP CER 0 1 uF 16 V 1 151 0060 0 1 pF 16 V 1 479 0472 RES 4 7 KQ 1 6 W 5 1 151 0060 CAP CER 0 1 uF 16 V 1 151 0060 CAP CER 0 1 uF 16 V 1 479 0331 RES 330 Q 1 6 W 5 1 479 0331 RES 330 1 6 W 5 1 479 0331 RES 330 9 1 6 5 1 479 0331 RES 330 9 1 6 W 5 1 151 0060 CAP CER 0 1 uF 16 V 1 150 0023 CAP 10 uF 16 U TYPE 1 150 0023 10 pF 16 U TYPE 1 150 0023 CAP 10 uF 16 V U TYPE 150 0062 47 uF 10 V U TYPE 1 150 0062 CAP E 47 uF 10 V U TYPE 1 150 0062 CAP E 47 uF 10 V U TYPE 1 151 0172 CAP CER 180 pF 50 V CH TYPE 1 479 0104 RES 100 1 6 W 5 1 150 0023 CAP E 10 uF 16 V U TYPE 1 151 0060 CAP CER 0 1 uF 16 V 1 151 0060 CAP CER 0 1 uF 16 V 1 151 0060 0 1 uF 16 V 4 151 0060 0 1 uF 16 V 1 150 0023 CAP 10 pF 16 V U TYPE 1 151 0172 CAP CER 180 pF 50 V CH TYPE 1 151 0018 150 pF 50 V 1 151 0060 0 1 uF 16 V 1 151 0060 CAP CER 0 1 uF 16 V 1 151 5004 CAP
8. TRIMMER 30 pF 1 151 0160 10 pF 50 V TYPE 1 479 0103 RES 10 KQ 1 6 W 5 1 479 0512 RES 5 1 1 6 W 5 1 151 0161 CAP CER 22 pF 50 V CH TYPE 1 479 0201 RES 200 Q 1 6 W 5 1 482 0270 XSTR 25 1907 1 151 0008 1000 pF 50 1 479 0101 RES 100 Q 1 6 W 5 1 10 4 Description Note No Part No Description 149 151 0202 39 50 1 R150 479 0183 RES 18 1 6 Wz 5 1 151 479 0332 RES 3 3 KQ 1 6 W 5 1 R152 479 0271 RES 270 Q 1 6 W 5 1 Q153 482 0270 XSTR 2SC1907 1 L154 180 5032 PEAKING COIL 100 02 TYPE 1 C155 151 0060 CAP CER 0 1 uF 16 V 1 C156 151 0002 CAP CER 100 pF 50 V 1 157 151 0002 100 pF 50 V 1 EM11 271 0007 EMI FILTER 2200 pF 1 12 271 0007 EMI FILTER 2200 pF 1 271 0007 EMI FILTER 2200 pF 1 14 271 0007 EMI FILTER 2200 pF 1 15 271 0007 EMI FILTER 2200 pF 1 6 271 0007 FILTER 2200 1 EMI7 271 0006 EMI FILTER 270 pF 1 18 271 0007 EMI FILTER 2200 pF 1 EMI9 271 0007 EMI FILTER 2200 pF 1 EM21 271 0007 EMI FILTER 2200 pF 1 22 271 0007 2200 1 EM23 271 0007 2200 pF 24 271 0007 2200 1 25 271 0007 2200 1 26 271 0007 EMI FILTER 2200 pF 1 EM27 271 0006 EMI FILTER 270 pF 1 28 271 0007 EMI FILTER 2200 pF 1 EM29 271 0007 EMI FILTER 2200 pF 1 XI 230 5035 CRYSTAL 53 203424MHz 5 ppm 1 LED 390 5128 LED SLP 280U F50 GREEN 1 IC
9. When 1 2 OS ROM 15 faulty 1 Since this is the program which operates the system no picture will appear 2 Depending on the case a mosaic pattern may appear 3 When IC3 RAM Is faulty 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 is easily distorted 4 When 1 4 13 faulty 1 Since tliis IC emits several control signals no picture will ap pear 2 Controller may not respond properly Pause reset may not respond properly 5 When 5 is faulty no oscillation is present clock 3 58 MHz is not produced with result that system does not operate at all no picture will appear 2 In addition several control signals are involved if fault is prc sent system will not operate and no picture will appear 3 Even if a picture appears characters may be distorted 4 Colors may be improper 5 Sound may appear alone without picture 6 Picture appear alone without sound 6 When IC6 IC7 are faulty Since these parts are 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 7 When ICS Is faulty 1 Since this is 5 stabilized current if malfunction is present uniform 5 V is not present system will not operate an
10. 1 2x 8 3 Note W Poly Bag 2 set Q ty Ns ng wann 4 Light Phaser ASSY LIGHT PHASER 6 0 0035 pene Part No Description Note 8 1 837 6068 PC Board Light Phaser a 1 B 2 253 6027 Right Case LP 1 3 253 6028 Left Case LP 1 8 4 253 6029 Case Cover 1 8 5 253 6030 Trigger LP 1 B 6 250 5020 Weight A 1 8 7 250 5021 Weight 1 8 8 250 5024 Shield Cover LP 1 B 9 380 5003 Lens LP 1 B 10 600 5299 Cord Assy LP 1 8 11 421 6396 Seal LP 2 B 12 123 5011 Shaft LP 1 13 600 5010 10 Cable Vinyl Single 1 5 mm mm Red 0 2m 0 8 x 16 Str 8 14 509 5151 Switch Micro Type V 151 3A5 Omron or Matushita 1 AH71517 B 15 029 0068 Tap Scr PH 2 x 6 2 B 16 029 0069 Tap Scr PH 2 6 x 10 Blk 3 8 17 029 0070 Scr PH 2 6 x 8 Blk 1 B 18 601 5588 RUBBER CUSHION A 2 B 19 601 5589 RUBBER CUSHION B 1 25 n 5 tica peed ive dei gz Xd SLI 1986 LIGHT PHASER R3 W 4AF ca 2 5 171 5375 LIGHT PHASER LIGHT PHASER 26 SEGA MASTER SYSTEM PARTS PRICE LIST p SEGA SEGA ENTERPRISES LTD n PARTS PRICE LIST FOR SEGA POWER SYSTH P 1 1 PARTS NAME FOB PRICE PARTS NO 400 5048Y 271 0005 BEADS INDUCTOR FBAOAVAGOOAB 271 0005 1 BEADS
11. 1 6419 18 Seal RF Ger UE Spain HITA WO Holland 421 6394 03 Seal Ser No AS 421 6394 05 Seal Ser No UK 421 6394 06 Seal Ser No Spain A 16 421 6394 11 Seal Ser No HK 421 6394 13 Seal Ser No ITA 421 6394 18 Seal Ser No Ger 421 6394 20 Seal Ser No Holland 17 421 6429 Seal RFI Mark A 18 000 0306 S Scr PH 3 x 6 W S A 19 029 0072 Tap Scr PH 3 x 16 Blk u 0 012 0312 Tap Scr PH 3 x 12 2 4 4 PART LIST PAL Dese Dunn Part No Description Note Q ty IV 271 0005 BEADS INDUCTOR 1 FBA04VA600AB JG 271 0005 BEADS INDUCTOR 1 FBA04VA600AB FBI 271 0005 BEADS INDUCTOR 1 FBA04VAGO00AB FB2 271 0005 1 BEADS INDUCTOR 1 FBA04VA600AB FB3 271 0005 1 BEADS INDUCTOR 1 04 600 4 271 0005 1 BEADS INDUCTOR 1 FBA04VAG00AB FBS 271 0005 1 BEADS INDUCTOR 1 4 600 1 150 0023 10 pF 16 V U TYPE 1 2 150 0060 0 1 uF 16 V 1 150 0060 CAP CER 0 1 16 V 1 4 150 0047 100 10 V U TYPE 1 RS 497 0121 RES 120 9 1 6 W 5 1 C6 150 0007 CAPE 4 7 uF 16 V U TYPE 1 D7 481 5045 DIODE ISSI33 152473 1 481 0149 R8 479 0103 RES 10 1 6 W 5 1 R9 419 0332 RES 3 3 KQ 1 6 W 5 1 R10 479 0332 RES 3 3 KQ 1 6 W x 5 1 151 0060 0 1 uF 16 V 1 R12 479 0332 RES 3 3 1 6 W 5 1 RI3 479 0332 RES 3 3 KQ 1 6 W x 5 1 14 151 0060 0 1 uF 16 V 1 RIS 419 0332 RES 3 3 KQ 1 6 W x 5 1 RI
12. 6 479 0332 RES 3 3 1 6 W x 5 1 17 151 0060 0 1 uF 16 V 1 R18 419 0103 RES 10 1 6 W x 5 1 L19 479 0103 RES 10 9 1 6 W 5 1 R20 479 0332 RES 3 3 KQ 1 6 W 5 1 R21 479 0102 RES 1KQ 1 6 W x 5 1 22 151 0201 82 50 1 R23 479 0222 RES 2 2 1 6 W 5 1 24 151 0060 0 1 uF 16 V 1 25 150 0047 100 uF 10 V U TYPE 1 126 180 0049 1 PEAKING COIL 10 uH 02 1 R27 479 0750 RES 75 9 1 6 W 5 1 C28 150 0047 CAP E 100 10 V U TYPE 1 29 479 0122 RES 1 2 1 6 W 5 1 C30 150 0062 CAPE 47 10 V U TYPE R31 479 0222 RES 2 2 1 6 W 5 1 32 151 0060 0 1 uF 16 V 1 R33 479 0102 RES 1 1 6 W 5 1 L34 180 5032 PEAKING COIL 100 uH 02 1 35 151 0190 12 50 1 C36 151 0172 CAP CER 180 pF 50 V CH TYPE 1 R37 479 0102 RES 1 1 6 W 5 1 R38 479 0102 RES 1 1 6 W 5 1 L39 180 5033 PEAKING COIL 12 pH 02TYPE 1 Description No 40 142 R43 C44 R45 Q46 R47 C48 50 2100 R102 R103 105 106 110 6112 113 114 R115 R116 R117 118 119 120 C121 C122 C123 C124 C125 R130 6131 132 C133 C134 C135 C137 C138 C139 CPI CP2 C140 C141 R142 R143 C144 R145 9146 147 R148 Part No Description Note 151 0159 100 pF 50 V CH TYPE 1 151 0190 12 pF
13. 7 610 0030 BOTTOM SE ASSY P X319 13125004 CAP TRIMMER 30 Hi 51 500 1 209 5020 CARD CONNECTOR 35 148 610 0180 CONTROL PAD ASSY 3429 209 5017 01 D SUB ANGLE TYPE UC 0060 2 43 212 5106 DIN CONN 8P B TYPE UC 005912 51 481 0149 DIODE 182473 4 481 5038 DIODE 15 35 100 10 481 5045 DIODE 155133 33 209 5023 EDGE CONNECTOR 5 40255 4 127 211 0006 FILTER STB271KB 12 271 0007 EMI FILTER STX222NB X12 314 0355 IC 74ALS174 X95 314 0356 IC 74ALS175 95 314 0358 IC 74115174 358 314 0361 IC 71416132 77 315 5216 IC CUSTOM 671 216 315 5124 IC 510 YH2602 1 182 313 5067 IC 1145 3342 MPR 10883 IC CXK3804P 20 247 313 0092 HA7805UC 348 315 0298 15 UPD4108C 15 3422 315 0298 IC UPD4108C 20 X417 PR 11458 IC wPD23Cl011 FOR HS 3091 3645 MPR 11459 IC uPD23C1011 FOR HS PLUS 3090 3634 MPR 11460 IC uPD23C1011 FOR SS 3095 X030 315 0041 IC 280A X172 001 6057 INDIVIDUA 671 0116 390 5128 LED SLP 280F 51U X14 253 5071 STICK 5 150 X18 180 5032 PEAKING COIL 100uF 310 180 5033 PEAKING COIL 12uH 10 212 5004 PIN PLUG FOR DC NP UC 005612 X26 253 6013 POWER BUTTON PB 15 509 5150 PUSH SWITCH SPQ O1N 87 200 5086 MODULATER 183622 792 200 5020 RF SWITCH BOX 191 313 5054 RGB ENCORDER 7040 401 509 5207 TACT SWITCH SKEVAA 17 610 0158 TOP CASE ASSY PBVA 630 482 0270 TR_2SC1907 25 600 5040 02 TV
14. AL BOX NS PLUS FIVE 3090 185 671 0115 INDIVIDUAL BOX SS FIVE 3091 195 390 5128 LED SLP 280F 51U 14 253 5071 MINT STICK SJ150 18 180 5032 PEAKING COIL 100uF 10 180 5033 PEAKING COIL 12 1 510 212 9004 PIN PLUG F R DC NP UC 0056 2 X20 253 6013 POWER BUTTON 15 7509 5150 SWITCIl_SPQ OiN 87 200 5088 HODULATER 113421 685 200 5020 RF SWITCH BOX 191 313 5054 RGB ENCORDER V 7040 401 509 5207 TACT SWITCIl_SKEVAA 17 610 0158 7 TOP CASE ASSY PBVA 630 482 0270 25 1907 25 600 5040 02 TV EXTENSION CABLE 2621 135 230 5035 53 2034248 2 176 19 PARTS PRICE LIST FOR SEGA POWER SYSTM 1 P 1 1 PARTS PARTS NAME FOB PRICE 400 5048Y AC ADAPTER 767 400 5050 AC ADAPTER AUSTRALIA 167 211 0005 BEADS INDUCTOR FDA04VA600AB 6 271 0005 1 BEADS INDUCTOR 4 7 610 0030 BOTTOM CASE ASSY X319 253 6008 BUTTON PB X18 151 5004 CAP CER TRIMMER 30pF X18 209 5020 CARD CONNECTOR 35P PRE35R 1 3148 610 0180 CONTROL PAD ASSY X429 209 5017 01 D SUB 9P ANGLE TYPE UC 006012 X43 212 5106 DIN CONN 8P B TYPE UC 005912 X51 481 0149 DIODE 152473 4 481 5038 DIODE 15 35 100 10 481 5045 DIODE 155133 33 209 5023 EDGE CONNECTOR PSB4D25S 4R1 3127 271 0006 FILTER STB271KB 12 211 0007 EMI FILTER STX222HB 12 314 0355 74ALS174 395 314 0356 IC 74AL
15. EXTENSION CABLE 2C2V X135 230 5035 XTAL 53 203424MII gt 2 176 31 1 1 FOB PRICE X17 3191 253 6028 i 92 380 5003 T X29 837 8008 PC BOARD LIGHT PHASER 1 633 253 8027 RIGHT CASE LP 92 250 5024 SHIELD COVER LP 27 253 6030 TRIGGER LP 17 250 5020 WEIGHT A 38 7250 5021 WEIGHT 41 601 5610 50 INDIVIDUAL BOX LP FIVE 95 hc gt gt gt SI MASK 28 PIN DIP CE lOuF 16V CP 0 022uF 16V C74 C75 is only pattern X tal 10 738635 MHz JPl is jumped between PAL and COM OF silk print SKByie 23 PIN SEGA seca ENTERPRISES LTD gt i Tod unge ema mar 122 222 1 BET LICET ee 1 Ic BD RGB TEE DESCRIPTION Va EE A 11 ERRE LES asas oe MANTARO e VTA EE WHT aaa A uu O 4 3 s Vail I ROM ka 52 32
16. I 315 0041 1C Z80ACPU 1 1C2 MPR 10052 1 ROM CXK3864P 20 1C3 315 0298 1C RAM PD4168 20 1 315 0298 15 4168 15 1 4 315 5216 IC CUSTOM CHIP G A 1 315 5204 FUJITSU NEC 1 5 315 5124 1 CUSTOM CHIP VDP 1 1 6 315 0298 15 1 RAM PD4168 15 1 1 7 315 0298 15 1 RAM PD4168 15 1 1 8 313 0092 1 REG 7805 1 1 9 313 5054 1 RGB ENCODER V7040 1 314 0062 741 574 1 1 12 314 0355 1 74ALS174 1 1C13 314 0356 IC 74ALS175 1 1C14 314 0358 1C 74ALS74 1 212 5106 DIN CONNECTOR 8P B TYPE 1 CON2 209 5020 CARD CONNECTOR 35 1 CON3 209 5023 01 EDGE CONNECTOR 50 1 209 5023 MITSUMI or BANDY CONS 209 5017 01 D SUB CONNECTOR 9P 1 CON6 209 5017 01 D SUB CONNECTOR 9P 1 CON7 212 5004 POWER JACK 1 POWER SW 509 5150 PUSH SWITCH 1 RESET SW 509 5031 BLADE SWITCH 1 PAUSE SW 509 5031 BLADE SWITCH 1 al 3 Control Pad ASSY CONTROL PAD 6l0 0 80 Description Bottom Case 3020 Rubber Contact SJ 151 Rubber Contact 4P 151 PC Board 45 x 38 3020 PC Board 51 x 31 3020 Insttuction Plate 3020 Blind Cover 3020 Assy Cable 9P L 2m 3020 Jumper Wire SJ 151 Part No C4 253 6020 Top Case 3020 c2 253 6021 C 3 1253 6024 7 Pad 3020 4 253 6023 Button 3020 5 253 5071 Stick 81 150 C 6 509 5089 1 67 509 5090 1 C 8 171 5193 3 171 5194 2 C 10 253 6022 C II 253 6032 C 12 600 5306 C 13 600 5137 1 012 0208 1 Tap Scr PH No
17. INDUCTOR 04 600 XT 610 0030 BOTTOM CASE ASSY PB 319 253 6008 BUTTON PB 18 209 5020 CARD CONNECTOR 35 PRE35R 1 148 610 0180 CONTROL PAD 55 429 209 5017 01 D SUB ANGLE TYPE 0 0060 2 43 212 5106 DIN CONN 8 B TYPE UC 005912 51 481 0149 DIODE 152473 4 481 5038 DIODE 1SR 35 100A 10 209 5023 EDGE CONNECTOR PSBAD25S ARI 127 271 0006 FILTER 51827118 12 271 0007 FILTER STX222HD 12 315 5216 IC CUSTOM CHIP G A 216 315 5124 IC CUSTOM 112602 51 182 313 5067 IC CXA 1145P X342 HPR 10052 IC CXK3864P 20 52315 313 0092 IC 91180516 48 315 0298 15 041080 15 X422 315 0298 IC UPD4108C 20 X417 MPR 11458 IC 023 1011 FOR HS X645 MPR 11459 02361011 FOR HS PLUS 634 11460 IC 02301011 FOR SS 2630 315 0041 IC 2808 5172 601 6057 INDIVIDUAL BOX BS FIVE 3080 170 671 0116 INDIVIDUAL BOX 5 FIVE 3095 X170 671 0114 INDIVIDUAL BOX MS PLUS FIVE 3090 185 671 0115 INDIVIDUAL BOX SS FIVE 3091 5195 390 5128 LED SLP 280F 51U 14 253 501 MINI STICK 51150 _ __ IN 212 5004 PIN PLUG FOR DC NP UC 0056n2 X26 253 6013 POWER BUTTON PB X15 509 5150 PUSH SWITCH SPQ OIN 87 610 0130 RGB BOX FRANCE 800 509 5207 TACT SWITCH SKEVAA 517 610 0158 CASE ASSY PBVA 630 482 0270 TR 25C1907 25 230 0046 1 XTAL _ 10 738635MII2 30 79 28 PARTS PRICE LIST FOR SEGA POWER SYSTM 1 1 P 1 1
18. S175 95 314 0358 74ALS74 58 314 0361 7416132 77 315 5216 CUSTOM CHIP G A 216 315 5124 IC CUSTOM CHIP 112602 1 182 313 5067 11 X342 MPR 10883 IC CXK3804P 20 X247 313 0092 MA7805UC X48 315 0298 15 041080 15 X422 315 0298 UPD4168C 20 X417 MPR 11458 IC 02301011 FOR NS 3091 X645 MPR 11459 IC 023 01011 FOR MS PLUS 3090 3631 MPR 11460 IC_uPD23C1011 FOR SS 3095 3630 315 0041 780 172 601 6057 INDIVIDUAL BOX BS FIVE 3080 170 671 0116 INDIVIDUAL BOX HS FIVE 3095 170 671 0114 INDIVIDUAL BOX HS PLUS FIVE 3090 185 671 0115 INDIVIDUAL BOX SS FIVE 3091 195 390 5128 4 LED SLP 280F 51U X14 253 5071 MINI STICK 54150 X18 180 5032 PEAKING COIL 100uF 10 180 5033 PEAKING COIL 12ull 10 212 5004 PIN PLUG FOR DC NP UC 005912 26 253 6013 POWER BUTTON PB 15 509 5150 PUSH SWITCH SPQ OIN 87 200 5109 RF MODULATER 113402 767 200 5088 RF MODULATER VV3421 AUSTRALIA 5167 200 5020 SWITCH X X191 313 5054 RGB ENCORDER V 7040 X401 509 5207 TACT SWITCI 17 610 0158 TOP CASE ASSY PBVA X630 482 0270 TR 2581907 325 600 5040 02 TV EXTENSION CABLE 2621 135 230 5035 53 203424 2 176 30 PARTS PRICE 1157 FOR SEGA POWER SYSTH PAL G P 1 1 PARTS NO PARTS 5 FOB PRICE 400 504 ADAP 767 271 0005 BEADS INDUCTOR FBAO4VAGOOAB 211 0005 1 BEADS INDUCTOR FBAO4VAGOOVB
19. SEGA MASTER SYSTEM SEGA ENTERPRISES LTD SEGA MASTER SYSTEM SERVICE MANUAL CONTENTS Service Procedures 1 Main Unit Power Base A Servicing the unit Power Base B Possible symptoms for each fault location C Flow chart for troubleshooting fault locations D Trouble shooting guide 2 Software 3 Auto Switchboxes and Cables 4 Controller Related Schematic Diagram Parts Location Parts List 1 Master System Power Base 2 PC Main M4 3 Control Pad 4 Light Phaser PARTS PRICE LIST 1 SEGA Master System RGB 2 SEGA Master System PAL 1 3 SEGA Master System PAL B 4 SEGA Master System PAL G 5 SEGA Light Phaser Service Procedures 1 The system is divided into four blocks 1 Main unit Power base 2 Software 3 Auto switchboxes and cables 4 Controller related 2 Use a tester to check for continuity and confirm that there are no short circuits between the power and ground 3 Check by individual block Set up a complete well operating system as a control one by one connect the blocks of the system to be tested to the control system and determine whether the system operates properly with the exchanged blocks 4 Service by individual block When the source of the malfunction has been narrowed down to the relevant block service that block or blocks in accordance with the appropriate service procedures 1 Unit Power Base A Servicing the main unit Powe
20. d no pic ture will appear 2 LED doesn t light 8 When IC9 is faulty 1 Since this part converts the RGB signal to composite mode a malfunction will result in no picture 2 Even if a picture appears color may be abnormal Flow chart for troubleshooting fault locations 1C8 OUT 5V check Reset circuit check XTAL 10 738 MHz output check pin 6 clock 3 58 MHz check 1 2 pins 20 22 pulse IN check pins 1 20 22 27 pulse check 1 5 RGB signal SYNC signal check Audio signal check 1C6 1C7 pins 20 22 27 pulse check 1 9 pins 1 2 3 RGB IN check 19 20 VIDEO OUT check RF modulator IN check RF modulator OUT 5 V check ICS pin 30 D Troubleshooting guide a In event controls do not respond normally Symptom 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 Fault Location s 1 CONS or CONG 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 CONS and CONG terminals and terminals of IC4 1 CONS or CONG is faulty short circuited 2 Soldering is short circuited 3
21. r Base Parts Test Procedure 1 1 8 7805 power check 1 IN DC 9 V 2 OUT DC 5 V Fault Location 1 IC8 7805 faulty 2 Soldering faulty 3 Short circuit 4 Printed circuit board PCB pattern is cut Symptoms 1 LED doesn t light 2 No picture 5 POWER switch faulty 6 Heat sink attachment faulty 1 PCB pattern is cut 2 Soldering faulty 2 Power check of ICs 1 15 Vcc 5 V 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 operating I Pin 30 of ICS 6 Vp p 10 738635 MHz 100 Hz 93 2 Pin 34 of 5 clock 3 579545 MHz 30 Hz 5 Check connectors 1 visual check of connec tor pins 2 Check connections 1 Capacitor C131 faulty 2 Soldering faulty 3 Resistor R130 faulty for faulty soldering 1 No picture 2 Screen is black 1 No picture 2 Screen is black 1 XTAL 10M faulty 2 C107 C108 faulty 3 Soldering faulty 4 PCB pattern is cut 5 ICS faulty 6 Frequency exceeds allowable deviation 1 Broken from excessive weight 2 Soldering faulty 3 PCB pattern is cut 4 Terminal plugs are dirty 1 No picture 2 Color may be monochromatic 1 No picture 2 Picture is monochromatic 3 Characters are unnatural 4 Controls do not respond pro perly
22. ut 2 Faulty connection at connector 3 PCB pattern is cut 4 Conductive rubber is faulty 5 Soldering faulty 1 Controller does not operate Doesn t move as it should Game doesn t start 2 Moves spontaneously by Itself Switch remains depressed in one direction 2 Solder is greasy Ys PAUSE Sw HF 104 wO so AE 6322 in E OSEGA 1986 164 MA POWER BASE PAL PC M4 PARTS LIST 1 Master System Power Base Assy Power Base Q ty qx nn BE pun Part No Description Note 610 0034 03 Assy Power Base AS Australia 610 0034 05 Assy Power Base UK United Kingdom 610 0034 06 Assy Power Base Spain 610 0034 11 Assy Power Base HK Hong Kong 610 0034 13 Assy Power Base ITA Italy 610 0034 18 Assy Power Base WG West Germany 610 0034 20 Assy Power Base Holland 1 253 6007 2 253 6014 Bottom Case 837 6097 1 Board PB PAL G Spain ITA WG Holland A 3 837 6118 IC Board PB PAL B AS 837 6135 IC Board PB PAL I UK HK A 4 250 5023 Shield Plate PB AS 250 5022 Shield Plate PB Bottom WG Only A 6 253 6009 Lid A A 7 253 6015 Lid B A 8 253 6010 Cover PB 9 253 6008 Button PB 10 253 6013 Power Button PB A 11 125 5016 Torsion Spting A 12 601 5514 Rubber Foot A 13 253 6011 Panel PB A 14 253 6012 Inst Panel PB 421 6419 Seal RF AS 42
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