Sega Mega CD II Service Manual
Contents
1. iil id ead A ai We iius SSERISRIIRSSSE SEESES Sne Ee CH voc avec 16 10 1 Schematic Diagram 2 I FLTS22 1 lam 1 1670 FLT 0 ohm Lk D K ai A C450 XCK 10004 6 3 o 9 3 DA i LRO e SE 10402 LI 1 o SW404 lt LSA 1141E1Au CLOSE lt _ Sw lt LL MERE CXA1082BQ C423 2553 2202 1C601 470u 6 3 C903 199u 6 3 CN406 Ic gt 31 03 ES Se P y Y 5 S To JIG 06402 696 2 vR402 jo 708 k R480 R485 10K 40 9 4109 R444 R456 R465 R454 19 C443 C452 C453 11 CIRCUIT BOARD DIAGRAM 2 Main Circuit Board Bottom View 11 11 1 Main Circuit Board Top View ce 15501 Kr D wy dei ES 5 den Rey E 93 GE A Ad R6 Ss alelulzalsalal ajajajaja i Kies spuer el jar ni im eror 442 TES KIC d arta sma ied 1331881 wee 5 di eid a mna o os epa 275 chine 3 9260000000070 e 14 gt d dr 6 1 ai 7 Be 3 on D E 4 cita noe TE p tcteotossooteo2. 3 Address Bus EE 71 uns O Upper Dasa Strobe CHER OR Data Transfer 10 DTACK Acknowledge mi BG O BwOnm DERE mi Tower So Clock re ERE TO Ge A 91 3 Va Power Supply 53 Az 5 Address Bus AL Address Bus 0 IC114 Battery Back up IC MB3790 Top View amp Pin Layout li Block Diagram VBAT2 VBATI 25 1C116 CMOS Quad Exclusive OR Gate IC TC74HC86 Top View amp Pin Layout a Truth Table 2B 2Y GND IC201 18Bit Digital Filter amp 16Bit D A Converter IC LC7883KM View Description Pin Name vo rege Name 00 Funci n amour o Dacci oupa 14 EMP2 L2 vem Reference voltage H impu 15 1_ 3 Powersupply of analog 16 DN 1 DoubleNornal sped switching pin L4 Powersupply of digital 17 SOC2 source selec inputs s PULL DOWN Digital audio data input DATA Input from the MSB in the bit serial state L R clock input 7 LRCK LRCK H CH1 LRCK L CH2 8 TEST 1 Test pin normally set to L ATT Attenuator data input Input from the LSB in the bit serial state SHIFT EN Attenuator data transfer clock input LATCH EN Attenuator data latch clock input 12 INITB Initializi
3. Interface switching 1C203 204 Quad Operational Amplifier IC NJM3403AM View W Pin Layout 14 8 IC205 Dual Operational Amplifier IC NJM3404AM View W Pin Layout 8 5 27 IC301 3 Terminal Voltage Regulator 4 IC UPC2405HF Bi Front View T IC401 Digital Processor for CD 28 IC CXD1167Q Top View Description Wi Name UO Function 1 FSW Output to switch the time constant of the spindle motor s output filter 2 MON O Spindle motor on off control output 3 MDP Spindle motor drive output Coarse control in the CLV S mode and phase control in the CLV P mode _ 4 MDS O Spindle motor drive output Speed control in the CLV P mode 5 EFM 1 EFM signal input from the RF amplifier 6 ASY O Output to control the slice level of the EFM signal 7 7 LOCK When the GFS signal is sampled by WFCK 16 and the level is H this pin outputs H when the level is L for 8 times continuously this pin outputs L vooo o utasai inme double speed 17 2872MHz in the double speed mode ENUE ENE RM ISL TEST I IN 11 PDO Output obtained by comparing the phases of the EFM signal and VCO 2 12 Ve GND OV 13 CLK Serial data transfer clock input from CPU Latches the data at the leading edge of the clock sig 14 XLT 1 Latch input from CPU Latches the data in
4. 151 0405 150 0440 479 5007 476 1330 476 1330 gt 25 a T gt D Ce C e Gc E ce 476 1330 J 16 479 5007 J 16 479 5007 J 16 416 1221 J 16 416 1221 J 16 416 1221 J 16 416 1221 J 16 416 1221 J 16 CAP E 10UF 16V 20 CAP E 10UF 16V 20 CAP E 10UF 16V 20 CAP E 10UF 16V 20 CAP E 100UF 6 3V 20 CAP E 10UF 16V 20 CAP E 10UF 16V 20 CAP E 100UF 6 3V 20 150 0439 150 0440 416 1221 J 16 RES CHIP 220 OHM 1 16W 5X 151 0405 CAP CER CP 0 1UF 16V F Z 416 1221 J 16 RES CHIP 220 OHM 1 16W 5X 150 0441 CAP E 1000UF 6 3V 20 476 1221 J 16 RES CHIP 220 OHM 1 16W 5 151 0405 CAP CER CP 0 1UF 16V F Z 416 1221 J 16 RES CHIP 220 OHM 1 16W 5X 150 0249 CAP E 330UF 16V U TYPE 416 1221 J 16 RES CHIP 220 OHM 1 16W 5 150 0440 CAP E 100UF 6 3V 20 416 1221 J 16 416 1221 J 16 RES CHIP 220 OHM 1 16W 5 RES CHIP 220 OHM 1 16W 5 151 0456 CAP CER CP 0 33UF 16V R K 150 0249 CAP E 330UF 16V U TYPE 415 0073 V RES TRM 20kOHM B RADIAL 150 0440 CAP E 100UF 6 3V 20 415 0074 V RES TRM 5kOHM B RADIAL 150 0301 CAP E 470UF 6 3V U TYPE Note S SEGA CD I Note All chip resistors
5. 314 0407 74HC74 1 1 837 9798 IC BD MEGA CD2 PCM BD 315 5632 1 CUSTOM CHIP MCE3 FUJITSU TOP CASE MEGA CD2 EXPORT 315 0745 80 315 0804 70 253 6661 TC511664BJ 80 50 TOSHIBA IC UPD421664LE 70 SOJ NEC nN 2 2 253 6635 DOOR SEGA CD2 USA 315 0804 80 IC UPD421664 80 SOJ NEC 2 2 253 6636 DOOR MEGA CD2 MULT M 315 0805 80 UPD421664 80L 50 NEC 2 3 253 6562 01 DOOR KNOB SEGA CD2 USA S 315 0745 80 IC TC5116648J 80 SOJ TOSHIBA 2 3 253 6562 02 DOOR KNOB MEGA CD2 MULTI M 315 0804 70 UPD421664LE 70 50 NEC 315 0804 80 315 0805 80 315 0796 70 315 0796 70 315 5181 01 315 0739 80 315 0777 80 315 0818 315 0822 80 315 0760 10 315 0677 315 0759 10 IC UPD421664 80 50 NEC IC UPD421664 80L SOJ NEC IC CXK5864BM 70 SOP SONY IC CXK5864BM 70 SOP SONY IC LC89515 OFP SANYO IC UPD424270LE 80 NEC IC HM514270AJ 8 50 HITACHI IC M5M44270AJ 8 SOJ MITSUBISHI MN414270SJ 08 SOJ PANASONIC IC LH5P832N 10 SOP SHARP 1 TC51832FL 10 SOP TOSHIBA IC TC51832AFL 10 SOP TOSHIBA DOOR LEVER MEGA CD2 CHUCK DISK MEGA CD2 CHUCK HOLDER MEGA CD2 LED LENS MEGA CD2 BLIND SHEET MEGA CD2 CONNECT PLATE MEGA CD2 CHUCK SHEET MEGA CD2 DOOR SPRING MEGA CD2 MAGNET MEGA CD2 OIL DAMPER MEGA CD2 TAP SCR PH M2 x 10 CUP SCR M2 6x5 253
6. A Di ne le y e s q fo E lt lq E ER Esa CT 3 GE emea enn cree ZE 2 De d Dli DOIT GED COCO EE f REG ele D let ala aja Ju ala ole D 7 zx GEI afn jajajajaja jua fee b l SCL TR RANE ERG TST PEIN TT RSE Sami SLIT eg Z MUI TEE ODO p er 2259 EL 12 PARTS SPECIFICATIONS TYPE FLIP FLOP 002 DUAL D 001 HEX INVERTER IC74HC74 74 04 View amp Pin Layout lll Top View amp Pin Layout 18
7. yes RF de Ota W Check RF circuit 1C402 and pickup dirt on lens etc Proceed to the disc circuit flowchart 11 Does the pickup lens move up and down NO after SW401 is set to ON from OFF YES Is the laser lit for about 2 seconds after SWAOI is set to ON from OFF Check the laser power meter becomes 90 120 y W NO YES Is focus engaged for about 2 seconds after SWA01 is set to ON from OFF Check the lens movement visually YES Proceed to the disc circuit flowchart Proceed to the focus circuit flowchan 8 1 Focus Circuit Flowchart Proceed to the feed circuit flowchart N Is 1C404 OV YES Proceed to the focus circuit flowchart Does IC404 Q9 become OV from SV for about 2 seconds after SW401 is set to ON from OFF NO YES Check 040175 peripheral circuits the 8 pin cable and pickup Does 1C404 62 become OV from 5V for about 2 seconds after SW401 is set to ON from OFF NO YES Check the connections of 1C402 Q9 IC404 faulty NO Are IC409 9V Check the power circuit YES Remove the top cover Set SW401 to ON to tum the power on and check that the pickup lens FD moves up and down Does the waveform shown below appear at TP X1 when SW401 is set to ON from OFF FD Focus Drive Approx 4 E echt mees enee Approx 0 Sms Solid line When focu
8. 45 RAMAD6 these pins provide multiplex signals of RAMADS the low order address data to the SRAM and when connected to an 1748 RAMAD3 MROM these pins provide data input signal from the MROM 49 RAMAD2 When connected to an SRAM these RAMADI pins also provide data bus signals to the RAMADO SRAM connected RAMAI3 A clock signal is input to XIN directly 12 High order address signals of the SRAM TESTI Test signal inputs Normally fixed at En ca A O RAMAIO However TEST2 is fixed at H when i r un Gnd pias an MROM or SRAM is used Note The interface with the serial DAC is formed in the me E initial mode 66 RAMA 68 4 Power supply pins Low address signals of the SRAM amp MROM 22 Block Diagram IC110 AI20 O RAMA All O CPU I F ADDRESS EXTERNAL O RAMAI AIOO RAM ROM MAMA e DATA BUS WF O RAMAI ABO O RAMAIO RAMA9 AGO O RAMAS ASO O RAMA7 Kee RE Se edd A20 O RAMAS ALO O RAMA3 RAMA2 O O RAMA RAMA 4 0 decl SERIAL DAC I F O MCLX O BCLK TEST O LRCLK TEST2 0 O SHR 5 30 XIN XOUT RESETR ODATL IC111 1Mbit CMOS Masked Programable ROM IC SEGA CD2 BOOT ROM EP IC SEGA CD2 USA BOOT ROM IC MEGA CD2 BOOT EP MULTI IC MEGA CD2 PAL
9. RES CHIP 330 OHM 1 16W 5X RES CHIP 2 2kOHM 1 16W 5 RES CHIP 330 OHM 1 16 5 RES CHIP 750HM 1 16W 5X RES CHIP 4 TkOHM 1 16W 5 RES CHIP 750HM 1 16W 5X RES CHIP 4 7kOHM 1 16 5 RES CHIP 4 TkOHM 1 16W 5 RES CHIP 4 TkOHM 1 16W 5 RES CHIP 4 TkOHM 1 16W 5X RES CHIP 4 1 16W 5 RES CHIP 330 OHM 1 16W 5X RES CHIP 330 OHM 1 16W 5 RES CHIP 4 7kOHM 1 16W 5 RES CHIP 3 1 16W 5 RES CHIP 3 1 16W 5 RES CHIP 3 3kOHM 1 16W 5X RES CHIP 750HM 1 16W 5 RES CHIP 750HM 1 16W 5 RES CHIP 1 5 1 16W 5 RES CHIP 1 2kOHM 1 16W 5 RES CHIP 4 1 16W 5 RES CHIP 8 2kOHM 1 16W 5X RES CHIP 1 6kOHM 1 16W 5 NOT USED RES CHIP 1 6kOHM 1 16W 5 RES CHIP 4 7kOHM 1 16W 5 RES CHIP 1 1 16W 5 RES CHIP 10 OHM 1 10W 5 RES CHIP 10kOHM 1 16W 5 RES CHIP 15kOHM 1 16W 5 RES CHIP 1kOHM 1 16W 5 RES CHIP 100kOHM 1 16W 5 RES CHIP 1 16W 5 RES CHIP 22k0HM 1 16W 5 RES CHIP 22k0HM 1 16W 5 RES CHIP 100 OHM 1 16W 5X RES CHIP 100 OHM 1 16W 5X RES CHIP 2 2kOHM 1 16W 5X RES CHIP 10kOHM 1 16W 5 RES CHIP 1 8kOHM 1 16W 5 RES CHIP 22k0HM 1 16W 5 RES CHIP 330 1 16W 5 CAP CER CHIP 4700 50 B K RES CHIP O OHM 1 16W J RES CHIP 180kOHM 1 16W 5X RES CHIP 330kOHM 1 16W 5 RES CHIP 220kOHM 1 16W 5 RES CHIP 150 1 16W 5 RES CHIP 220kOHM 1 16W 5X RES CHIP 15kOHM 1 16W 5 RES CHIP 39kOHM 1 16W 5 RES CHIP 4 TkOHM 1 16W 5 RES CHIP 330 1 16W 5
10. B K 150 0016 151 0419 151 0437 CAP E 1UF 50V CAP CER CP 0 1UF SOV B K CAP CER CP 150 50 CH 151 0437 CAP CER CP 150PF 50V C 151 0437 CAP CER CP 150PF 50V C 151 0437 CAP CER CP 150PF 50V C 151 0437 CAP CER CP 150PF 50V C 151 0437 CAP CER CP 150PF 50V C 151 0437 CAP CER CP 150 50 C 151 0437 CAP CER CP 150PF 50V C 151 0437 151 0437 CAP CER CP 150PF 50V C 151 0437 CAP CER CP 150PF 50V C CAP CER CP 150PF 50V C CAP CER CP 150PF 50V C CAP CER CP 150PF 50V C CAP CER CP 150PF 50V C CAP CER CP 150PF 50V C CAP E 100UF 6 3V 20 CER CP 0 022UF 25V B K CAP CER CP 0 1UF 16V F Z CAP CER CP 47PF 50V CH J CAP CER CP 47PF 50V CH J CAP CER CP 0 1UF 16V F Z CAP CER CP 0 1UF 16V F Z CER CP 0 1UF 16V F Z CAP CER CP 0 1UF 16V F Z EDGE CONN 60PIN CD2 CUSTOM J H J H J H J H J H J H J H J CAP CER CP 150PF 50V CH J H J H J H J H J H J H J H J 151 0437 150 0440 151 0438 151 0405 151 0405 209 5068 210 5114 STEREO MINI JACK HSJ2000 01 010 210 5115 RCA JACK YKC21 0242 212 5378 DC JACK 0470 01 630 212 5382 PIN HEADER ST IL S 12P S2T2 EF 212 5379 CONN BASE 9P B9B PH K S 212 5380 CONN BASE 8P BBB PH K S Note 5 SEGA CD 42 MEGA CD II CN406 5401 212 5281 510 5050 250 5342 CONN E8G 701B 00 LEAF SW LSA 1141E2AU SW COVER CD2 SY FOR SW401 13 4 Accessories Packa
11. a ME dE 3 W 8 f 1 3 e 5 IN POATA E y P i Le 21 x E j 59 Go SCH nose y be mE c we nama e it aut dam cum dua ia s a 13133 Ei I 441333433333 TY wam r nears I l Se bot Il l 4 zi pr I ar m C ed w Lond LJ bs BAR amp 1 asas lt Raa po e 1 lie 07 mene 3 MH 5 LCi a le 8 Sr wwe l a lx 4 AIN 3 H i 5 ando 1512244 H Eh aJ 7 414212 dl 33333333 E dua w R241 R242 fi iilii 33713221 153532044 am tm L 142 Zb k SaL lt T T 33 C A PH a A lt i 1 1 KM Te lt T A lt 1 a 141 bu Y U 22 222 222222 REE Hm y 542444 WM au me uL A A hii Mir ALA 9 r Y I 1 D tas 9 z 78 444 H I 1 EE Gant eo _ 1 AA SS I 1 8 518889 2 2552 Posi m al 8 L
12. 09 oo el lt gt a w wis lt i gt gt E ii IC102 103 1Mbit Dynamic IC TC511664BJ 80 IC UPD421664 80 IC TC421664LE 70 IC UPD421664 80L 1 104 105 8bit CMOS Static RAM IC CKX5864BM 70 IC MB8464 80 IC MB8464 90 Top View amp Pin Layout IC106 CD ROM LSI IC LC89515 Top View 20 A0 A7 Address inputs I O1 1 O16 Row address strobe Data inputs outputs Top View amp Pin Layout A0 A12 101 008 Address inputs Data inputs CE1 CE2 Chip enable 1 2 inputs WE Write enable input Column address strobe Output enable input High order byte write Vcc 5V supply enable GND Ground Low order byte write NC Not connected enable Output enable Supply voltage Ground Not connected 107 CMOS Dynamic IC UPD424270LE 80 IC HM514270AJ 8 IC M5M44270AJ 8 Top View amp Pin Layout Input State Output RAS CAS UWE LWE State Note H High inactive L Low active D Don t care 1C108 109 8bit CMOS Pseudo Static RAM IC110 PCM Sound Source IC LH5P832N 10 IC TC51832FL 10 IC RF5C164A IC TC51832AFL 10 Parts No 315 5476A Top View amp Pin Layout E Pin Configuration and Pin Description Sms rt 1 0 1 0 Data Input Output IC MN414270SJ 08 Operation Mode AE A SO duo D IEA eee AA 3 L L H H Vald Redece Eee Ue L H
13. 16PIN FUJITSU 16 670 2708 SEAL RFI MARK MEGA CD MULTI 314 0549 01 TC74HC86 SOP TOSHIBA 313 5184 LC7883KM SOP SANYO 17 670 3209 CAUTION LABEL SEGA CD2 313 5231 IC LC78815M SOP 20 SANYO 17 670 3210 CAUTION LABEL MEGA CD2 MULTI 313 5249 NJM3403AM SOP IC NJM3403AM SOP 012 P00310 TAP SCR PH M3 x 10 1 NJM3404AM SOP 1 UPC2405HF NEC CXD11670 OFP CXA1081M 50 IC CXA10820 QFP 1 UPDTSPOOBGB QFP 1 UPD75006GB OFP IC 74HCUO4 SOP IC 4566 85 1 AN8388SR SOP IC AN8388NSRBE1 SOP IC PST529F MMP3P RESET IC XTAL OSC 50 ODOMHZ JX0 7 XTAL OSC 16 9344MHz HC 49U CER OSC 4 19MHZ XSTR CHIP 25 2812 5 XSTR CHIP 25C2812 6 CP TB XSTR CHIP 25 2812 5 XSTR CHIP 2SC2812 6 CP TB XSTR CHIP 2502812 5 XSTR CHIP 2SC2812 6 CP TB 012 P00308 TAP SCR PH M3x8 313 5252 315 0799 315 0808 314 0571 313 5253 314 0572 314 0585 314 0573 230 5103 482 5191 482 5192 482 5191 482 5192 482 5191 482 5192 Note S SEGA CD I M MEGA CD II 39 Q 301 Q 301 0 301 Q 302 Q 302 Q 302 Q 302 Q 401 Q 401 Q 402 Q 402 BT101 D 301 D 302 D 401 D 601 0101 482 5193 482 5194 482 5195 482 5191 482 5192 482 5204 482 5205 482 5196 482 5197 482 5191 482 5192 401 0037 481 5119 481 5121 481 5120 481 5121 39
14. 3 2 2 Tum over the top case assembly and release two 2 stoppers then remove the door lever in the direction of the arrow 3 Release two 2 stoppers and remove the door knob Door Lever Stoppers lt 2 Stoppers Door Knob 4 CD DRIVE ADJUSTMENT 4 1 Test Equipment and Test Disc 1 Frequency counter 2 Oscilloscope 20MHz or more 3 Adjustment jig MEGA CD II F CD ADJ JIG 4 Audio generator 5 Voltmeter two units with one needle or one unit with two needles 6 Test CD SONY TYPE 4 4 2 Set up for Adjustment 1 Connect both terminals of J401 2 Tum SW401 on and fix it using plastic tape etc 3 Connect the jig to CN403 4 Supply power to the unit and jig Use AC adaptor of MEGA CD II SEGA CD for jig 5 Press the RESET switch of the jig so the counter reads 0 6 Connect Q301 s emitter and CN101 pin 28 B or connect Mega Drive Genesis smer BE BE1rscr 3 Note 1 The test mode is incremented each time the TEST switch of the jig is pressed Note 2 Test mode is for checking the laser power and keeps the pickup laser illuminated 4 3 Adjustment Parts Location JS C410 TPVR oy VR402 TP PLCK O H a Tracking gain 3401 VR403 GND AAA CN403 Adjustment jig 4 4 Adjustment Test equipment Test point Adjustment Adjust name ment point TP PLCK Frequency 1 VCO adjustment Osc
15. 5 RES CHIP O OHM 1 16W 5 RES CHIP 33 OHM 1 16W 5 RES CHIP 33 OHM 1 16W 5 RES CHIP 33 OHM 1 16W 5 RES CHIP 33 OHM 1 16W 5X RES CHIP 33 OHM 1 16W 5 RES CHIP 33 OHM 1 16W 5X RES CHIP 33 OHM 1 16W 5X RES CHIP 33 OHM 1 16W 5 RES CHIP 33 OHM 1 16W 5 RES CHIP 33 OHM 1 16W 5X RES CHIP 33 OHM 1 16W 5X RES CHIP 33 OHM 1 16W 5 RES CHIP 33 OHM 1 16W 5 RES CHIP 33 OHM 1 16W 5 RES CHIP 33 OHM 1 16W 5X RES CHIP 33 OHM 1 16W 5X RES CHIP 0 OHM 1 16W RES CHIP O OHM 1 16W RES CHIP 220 OHM 1 16W 5X RES CHIP 220 OHM 1 16W 5 RES CHIP 220 OHM 1 16W 5X RES CHIP 220 OHM 1 16W 5X RES CHIP 220 OHM 1 16W 5X RES CHIP 220 OHM 1 16W 5X RES CHIP 220 OHM 1 16W 5X RES CHIP 220 OHM 1 16W 5 RES CHIP 220 OHM 1 16W 5 CAP CER CP 1000PF 50V B K CER CP 0 1UF 16V F 2 CAP E 100UF 6 3V 20 CAP E 10UF 16V 20 CAP E 10UF 16V 20 CAP E 10UF 16V 20 E 10UF 16V 20 CAP E lOUF 16V 20 CAP CER 680 50 B K CAP CER CP 680PF 50V B K CER CP 0 1UF 16V F Z CAP CER CP 8200PF 50V B K CAP CER CP 8200 50 B K CAP CER CP 0 1UF 16V F Z CAP CER CP 1200PF 50V B K CAP CER CP 1200PF 50V B K CAP CER CP 0 1UF 16V F Z CAP E 10UF 16V 20 E 10UF 16V 20 CAP E 10UF 16V 20 CER CP 2200 50 CER CP 0 1UF 16V F Z CAP CER CP 8200PF 50V B K CER 2200 50 B K CAP CER CP 8200PF 50V B K CAP E 10UF 16V 20 CAP E 10UF 16V 20 CAP CER CP 8200PF S0V B K CAP CER CP 8200 50 B K
16. BOOT ROM Top View 4 Pin Layout ll Block Diagram 0 O 0 Do O O Y DECODER Aen OUTPUT BUFFER x m LEKT 17 ESO Y SELECTOR 2 A o 5 E 5 Looe A o Z gt ol 6 4 ps 5 Aso e MEMORY CELL MATRIX A o B O 65536 18 452 1418 A o x D CE A o 5 ge x x selective LA A x I Selective 10112 64k 8k x 8 bit Static RAM IC MB8464A 10LL Top View amp Pin Layout Address inputs 1 0 1 0 Data inputs outputs CS Chip select 1 CS Chip select 2 Output enable WE Write enable Vcc Power supply 5V GND Ground NC Not connected IC113 16 32 Bit Microprocessor MC68HCOOOFN12 IC HD68HCOO0CP 12 Top View amp Pin Layout 24 lll Biock Diagram d GND MEMORY CELL ARRAY 256 x 32 x 8 gt gt o o 2 ue o o m c o c o ES o D 2 VO GATE COLUMN DECODER CS IC TMP6BHCOOOT 12 I Signal Description ADDRESS BUS A23 A1 DATA BUS PROCESSOR STATUS ASYNCHRONOUS BUS CONTROL MC68HC000 M6800 PERIPHERAL CONTROL BUS ARBITRATION CONTROL Io BUT INTERRUPT CONTROL ll Description No Pin 0 Function 1 D No Pin Name O Function No Pin Name l O Function BERR BusError____ 25 IPL a Interrupt Control
17. D D Open RASonly refresh cyele 00 02 H gt L L D D Ope CAS before RAS refresh cyele L H H Valid High speed page mode read cycle L H L L2 L2 Open High speed page mode early write cycle High speed page mode delayed write cycle High speed page mode read modified write cvcle 21 Description IC110 Name yo Function UO Function 75 Low address signals of the SRAM amp MROM 42 RAMAX LSB address signal of the MROM High order 32k byte SRAM amp MROM select signal Low order 32k byte SRAM amp MROM The inter select signal Signal to write data to the pseudo DIETER P5 Signal to read data from the pseudo e O SRAM SRAMorMROM 32 DAC 29 SHL DAC7 3 L data sample hold signal DACT 3 R data sample hold signal SHR O HEUET Rh EC OEC wax 0 clock signal output to the serial 40 ck z i ZS signal output to the serial mill ERE XIN An external crystal em eds ul is Note Address signals from gP Multiplex signals of R and L data output to the parallel DAC Data bus signals with 4P 28 DO 77 CSB 1 Chip select signal from yP 13 1 Read signal from 4 WER 1 Write signal from When connected to a pseudo SRAM
18. Mixing with mixing terminal possible Sound circuitry Audio characteristics 2 IDENTIFYING PARTS 2 1 Front amp Top View of Console Indicator LED 2 3 Accessories SEGA CD II AC Adaptor Stereo Mixing Cable Except Canada Steel Joining Plate Retainer Bracket 2 2 Back View of Console D Door Audio Line Out Jacks for Stereo Sound Connection to Other Components AC Adaptor Jack Door Knob Mixing Jack for Stereo Sound Connection to the Original Mega Drive amp Genesis MEGA CD II AC Adaptor E U K Kuwait U K and Kuwait Australia and New Zealand and New Zealand Extension Plate Hold Plate Spacer y Audio RCA Cable Except USA amp Canada Extension Panel Assy Spacer a Screw for Steel Conn Plate B Joining Plate Conn Plate A Note Names of parts in brackets are used in the parts list 3 DISASSEMBLY 3 3 Door Removal 3 1 Chuck Disk Assembly Removal 1 Remove the top case assembly See item 3 2 1 Press the door knob to open the door UO Tren he OOF ANOD 3 Remove the blind sheet on the right h k disk 2 Release three 3 stoppers holding the chuck dis 4 Reniove the door sprig assembly 5 Turn over the top case and remove two 2 screws 3 When reinstalling align the recesses in the chuck holder with the suppers then remove the oil damper 6 Push the doo
19. PSSL is H output when PSSL is L 73 Power supply 5V 74 DAI2 O DAIZ output when PSSL is H RAOV output when PSSL is L 75 DAI3 O DAI3 output when PSSL is H CALR output when PSSL is L 76 DAI4 DAI4 output when PSSL is BCLK output when PSSL is L 7 DAIS O DAIS output when PSSL is H BCLK output when PSSL is L 78 DAI6 O DA16 MSB of parallel audio data output when PSSL is H DATA output when PSSL is L Strobe signal output 176 4kHz 352 8kHz in double speed play when DF is on and 88 2kHz 176 4kHz in double speed play when DF is off ele put ae Strobe signal output 88 2kHz 176 4kHz in double in double speed play when DF is off speed play when DF is on and 44 1kHz 88 2kHz 29 30 Block Diagram SUBCODE SYNC DETECTOR 23 BIT M P ke I SHIFT REGISTER CLV SERVO W CONTROL PROTECTOR INSERTER VCO CIRCUIT TIMING GENERATOR X TAL CIRCUIT TIMING GENERATOR SUBCODE SUBCODE Q DEMODULATOR REGISTER EFM DEMODULATOR ERROR DETECTOR CORRECTOR INTERPOLATOR IC402 RF Amplifier for CD IC CXA1081M View ili 30 16 TRACKING ERROR AMP Name z Function The RF summing amp outputs are capacity SE
20. T SEH EJ per r INTW PROGRAM MEMORY E 2 PSO PS3 plage PRONI fronts SO SBO PO2 ESL BO64 x 8 BITS SCK PO O Aporte Kz so es 51214 BITS INTCSI A port 7 P70 P73 INTO PIO O PORT 7 Ka INTI 11 O INTERRUPT 2 INTe PI2 CONTROL 2 INT4 POO KRO P6O SKRT PTS ixx 2M SYSTEM BIT SEO Susi oa GENERATOR STAND BY cru CONTROL DIVIDER sug main CONTROL Lock PCL P22 Xi x2 VPP vss RESET 407 CMOS Inverter IC 74HCU04 Parts No 314 0571 Top View li Pin Layout Truth Table 36 IC408 Bilateral Switch IC TC4S66F TE85R Top View o Pin Layout 5 4 IN OUT 11 OUT IN 2 Tow 8 IC409 4ch Linear Driver IC ANS388SR IC AN8388NSRBE1 Top View Block Diagram 1 24 12 13 Description Em Motor driver 3 reverse run output Motor driver 3 forward run output Motor driver 4 reverse run output Motor driver 4 forward run output 11 Driver ground pin 2 Motor driver 2 input PC2 power cutoff input Motor driver 1 input 601 System Reset IC PST529F MMP3P Top View lll Block Diagram 37 13 EXPLODED VIEW amp PARTS LIST 13 1 Exploded View 38 13 2 Mechanical Parts List 13 3 Electrical Parts List maa temm rH mmm wes 1 837 9615 IC BD SEGA CD2 MAIN BD USA CBA 5 314 0367 IC 74HC04 1 837 9616 IC BD MEGA CD2 MAIN BD MULT
21. and capacitors 1 6 x 0 8 mm M MEGA CD II 41 150 0329 CAP E 3 50V U TYPE 150 0440 CAP E 100UF 6 3V 20 150 0440 CAP E 100UF 6 3V 20 150 0442 CAP E 0 47UF 50V 20 150 0443 CAP E 22UF 6 20 150 0443 CAP E 22UF 6 20 150 0016 CAP E lUF 50V 150 0442 CAP E 0 4TUF 50V 20 151 0415 CAP CER CP 3900PF 50V B K 151 0416 CAP CER CP 5PF 50V CH C 151 0417 CAP CER CP 0 033UF 50V B K 151 0419 CER CP 0 1UF 50V B K 151 0417 CAP CER CP 0 033UF 50V B K 151 0419 CER CP 0 1UF SOV B K 151 0419 CAP CER CP 0 1UF 50V B K 479 5007 J 16 RES CHIP 0 OHM 1 16W J 151 0413 CAP CER CP 2200PF 50V B K 151 0419 CER CP 0 1UF 50V B K 151 0417 CAP CER CP 0 033UF 50V B K 151 0417 CAP CER CP 0 033UF 50V B K 151 0419 CAP CER CP 0 1UF SOV B K 151 0420 CER CP 0 056UF 50V B K 151 0419 CAP CER CP 0 1UF 50V B K 151 0421 CAP CER CHIP 4700PF 50V B K 151 0409 CER CP 1000 50 151 0417 CER CP 0 033UF 50V B K 151 0405 CAP CER CP 0 1UF 16V F Z 151 0422 CAP CER CP 24PF 50V CH J 151 0422 CAP CER CP 24PF 50V CH J 151 0405 151 0405 151 0405 151 0405 151 0405 151 0405 151 0405 151 0405 CAP CER CP 0 1UF 16V F 150 0441 CAP E 1000UF 6 3V 20 151 0436 CER CP 15PF 50V CH J 151 0405 CAP CER CP 0 1UF 16V F Z 151 0405 CAP CER CP 0 1UF 16V F Z 151 0409 CAP CER CP 1000 50
22. before input meses epe Ge 5 LD astas power conrol APC LD amp ouput DC volage when swiss o Na PD pen DES Ng n 6 Lx Por 1 RFI amp Q ven pa Connected to he C terminal of the preso ad Fa poz 1 RFIV amp invening Comente he B D terminal ofthe poo and he cen s ol v With positive negative power supplies GND With uias power supply VR connected to pin 14 FIN ampinvening input Comes Femina of he photodiode and the ren par T EV anp invering Comeoed to he E temina ofthe podes the curren is input 2 EO EE CI 1 repere tonon teen 00000007 EE Ver With positive negative power supplies Negative power supply pin With single power supply GND DEDO DTS TTT e O pues DM EE E cr 1 AM I P EIC 25 Doo With positive negative power supplies GND With single power supply GND VEE DENSA TT 27 tW 0 EFM comparar ouput DC 10K Fok O Focus OK comprar ouput DC vola wi 1k load ressor come Lm EBON 1 serio LD DC valage wien LD ie wedo v lt resme _ Note Values in brackets are for CXA1081Q Voc 2 5V Veg Donp 2 5V VC GND N pg 32 403 Servo Signal Processor for CD IC CXA1082Q Top View 36 2
23. is not obtained 8 Tracking seve ON 8 1C403 pin 9 Disc servo ON 9 50ms div 500ms div 1C401 pin 10 10 Reads in the TOC disc data 5V Starts reading data MM 10 8 GUIDES FOR SERVICING is the EF balance adjustment OK Vref A B B Proceed to the tracking circuit flowchart Proceed to the feed circuit flowchart Proceed to the disc circuit flowchart Check the pickup Dirt on lens laser power measurement 90 120 u W Check the audio circuit NO Proceed to the control circuit flow chart Does the control picture appear when the start button is pressed YES N Does the counter read 00 00 when the CD door is closed YES Is the TOC read See the flowchart NO on page 10 until the TOC is read Can the first track of test CD be played Can each track be searched cor rectly YES NO Is the sound output YES Check general operation YES Is each operation in the control picture normal YES Check the control circuits Check the control circuits Check the control circuits Check the control circuits Check the control circuits NO NO Refer to page 2 YES Is the tracking loop engaged IC403 D La Servo ON Vref Is the waveform of 1V div 0 5s div observed NO Proceed to the tracking circuit flowchart Is an RF waveform of approx 1 5Vp p observed 1 402
24. the reset input Ps DATA 1 Serial ante puten me CPU a r i mewetemweCm 25 es 1 Serial data transfer clock input from the CPU 27 BW Sled amp inverting input Signal to detect whether the limit switch that detects the disc innermost edge is turned on or off Time constant components of the loop filter is connected extemally 27 28 The CX23035 CXD1135 phase comparator output PDO is input 29 ISET Supplies the current that determines the levels of the focus search track jump and sled kick EI VCOF The VCO free running frequency is proportional to the resistance between this pin and ping 2 ca o asa veo pe al Lock L activates the sled run out prevention circuit A 47k Q pull up resistor is incorporated ERREECHEN 5 MON Fhe MON pin orhe meet 36 Fsw Time constant components of the LPF for the CLV servo error signal are connected externally 38 sPDLO 1 Spindle drive amp inverting input BER Fa wock Ciok input for auo seen Nom Siu O CT ol MR 1 Mirror signal input 4 DFCT 1 DEFECT signal input H activates the defect troubleshooting circuit 45 TE i Tracking error signal input Tracking zero cross comparator input ATSC ATSC detection window comparator input al FE 1 Focus error signal input 34 1C404 4Bit Single Chip Microcomputer IC UPD75POO8GB IC UPD75006GB Top
25. 0 5449 FLT505 271 0058 479 5009 479 5009 271 0058 479 5009 479 5009 479 5009 479 5009 479 5009 271 0059 271 0060 419 5009 211 0007 419 5009 211 0007 419 5009 211 0054 514 5044 416 1222 J 416 1472 J 16 476 1472 J 16 416 1331 J 16 416 1412 J 16 XSTR 25B963 M XSTR 258963 L XSTR 2SB963 K XSTR CHIP 25C2812 5 CP TB XSTR CHIP 2SC2812 6 CP TB XSTR CHIP 2SC4362 XSTR CHIP UN221L XSTR 2SA1704 S AN XSTR 2SA1704 T AN XSTR CHIP 25C2812 5 CP TB XSTR CHIP 2SC2812 6 CP TB BATTERY ML2016 HS1 SANYO DIODE 05 10 DIODE GMBO BT DIODE 1S2076RE DIODE GMBO1 BT LED LN88RPX FILMAC TH30333MAT RES 0 OHM 1 4W RES 0 OHM 1 4W FILMAC TH30333MAT RES 0 OHM 1 4W RES 0 OHM 1 44 RES 0 OHM 1 4W RES 0 OHM 1 4W RES 0 OHM 1 4W FILMAC TXOSSOONBT FILMAC TX07520NBT RES 0 OHM 1 44 EMI FILTER STX222MB RES 0 OHM 1 4 EMI FILTER STX222MB RES 0 OHM 1 4N RES O OHM 1 44 RES 0 OHM 1 4W RES 0 OHM 1 4W LINE FILTER CHOBRBO FUSE PICO 11 25202 5 RADIAL RES CHIP 360 OHM 1 16W 5 RES CHIP 4 TkOHM 1 16W 5X RES CHIP 2 2kOHM 1 16W 5X RES CHIP 47kOHM 1 16W 5 RES CHIP 4 TkOHM 1 16W 5X RES CHIP 4 TkOHM 1 16W 5 RES CHIP 0 OHM 1 16W J RES CHIP 0 OHM 1 16W J RES CHIP O OHM 1 16W J RES CHIP D OHM 1 16 J RES CHIP 0 OHM 1 16W J RES CHIP 1 6k OHM 1 16W 5X RES CHIP 1kOHM 1 16W 5 RES CHIP 4 7kOHM 1 16W 5 RES CHIP 4 1 16W 5 RES CHIP 4 TkOHM 1 16W 5X RES CHIP 4 TkOHM 1 16W 5
26. 22 BOX amp PACK SET CD2 MULTI 4180 FOR MK 4180 BOX amp PACK SET CD2 MULTI 4182 FOR MK 4182 BUSINESS REPLY MAIL CD2 USA BUSINESS REPLY MAIL SOC GUARANTEE CARD CD2 MULTI EXCEPT AUSTRALIA amp NEWZEALAND WARRANTY CARD OZISOFT AUS FOR AUSTRALIA amp NEWZEALAND POLY BAG 300 550 0 05 EXP6 POLY BAG 200 x 310 x0 05 EXP6 POLY BAG 70x100 x0 05 POLY BAG 120 x 300 x0 02 CROSS SELL POSTER GEN2 USA PLAY INSTR CDU SEWER SHARK CAN M 51 M S B M M S 5 KEDI aaa was Canada Except USA amp Canada Except y Canada Kuwait MORO 1777 ATI Note All chip resistors and capacitors 1 6 x 0 8 mm 1993 Sega Enterprises Ltd Printed in Japan 1 9 BLOCK DIAGRAM A o a 2 M POR on O m 108101 btPin CONECTOR 1 i 0502 C2812 16107 04242701 80 M2016 HSI El EE Fes ary iL nr 315 5476 mE Pip RTT 9 42 AUDIO SECTION CO SECTION CN403 ADJUSTPENT JUG CONNECTOR 005 yu 4 3 2 1 124442222555 844494444 dtd 10 SCHEMATIC DIAGRAM 10 1 Schematic Diagram 1 te i 33 33 i i E 1 383333333 1 H KE I BE pts acr
27. 5 IS Block Diagram 12 DATA REGISTER INPUT SHIFT REGISTER ADDRESS DECODER SEQUENCER OUTPUT DECODER TGi 2 TMi 7 PSi 3 33 lg Description Name UO Function A capacitor is inserted between this pin and pin 8 to decrease the focus servo high frequency gain FS3 is turned on or off to switch the focus servo high frequency gain win 0 d WI Time constant components are connected externally to boost the focus servo low frequencies w Focus drive output Focus amp inverting input Time constant components are connected externally to form the focus search waveform Lo AE Time constant components connected externally to switch the tracking high frequency gain o o c Time constant components are connected externally to switch the tracking high frequency gain t3 gt O Tracking drive output BBBBB 2 13 1 Tracking amp inverting input 4 gt de SL e Sled amp non inverting input Sled drive output 15 SLO SSTOP FSET Determines the peak of the focus tracking phase compensation and the frequency fo of CLV LPF 1817556 O OmwsFZC AS 2 STOP and BUSY suis y commands from the CPU 20 cour 0 Outputs a signal to count the number of tracks aj Dic Used to jump one track A 47k Q pull up resistor is incorporated zl Reset when L is input to
28. 6 1103 J 16 RES CHIP 10kOHM 1 16W 5 151 0405 CER CP 0 1UF 16V F Z 476 1473 J 16 RES CHIP 47kOHM 1 16W 5 150 0439 CAP E 10UF 16V 20 476 1103 J 16 RES CHIP 10 1 16W 5 151 0406 CAP CER CP 100 50 SL J 416 1103 J 16 RES CHIP 10 1 16W 5 CER CP 0 1UF 16V F Z 416 1103 J 16 RES CHIP 10kOHM 1 16W 5 CER CP 0 1UF 16V F Z 416 1103 J 16 RES CHIP 10kOHM 1 16W 5X CAP E 10UF 16V 20 476 1103 J 16 RES CHIP 10kOHM 1 16W 5X CER CP 0 1UF 16V F Z 416 1103 J 16 RES CHIP 10kOHM 1 16W 5X CAP E 10UF 16V 20 476 1103 J 16 RES CHIP 10kOHM 1 16W 5 CER CP 0 1UF 16V F Z 416 1103 J 16 RES CHIP 10kOHM 1 16W 5 CAP E 10UF 16V 20 476 1103 J 16 RES CHIP 10 1 16W 5 CER CP 0 1UF 16V F Z 416 1103 J 16 RES CHIP 10kOHM 1 16W 5 CAP E 10UF 16V 20 419 5007 J 16 RES CHIP O OHM 1 16W J CAP E 10UF 16V 20 416 1103 J 16 RES CHIP 10kOHM 1 16W 5 CER CP 0 1UF 16V F Z 476 1683 J 16 RES CHIP 68kOHM 1 16W 5 CAP CER CP 0 1UF 16V F 7 416 1473 J 16 RES CHIP 47kOHM 1 16W 5X CER CP 0 1UF 16V F Z 3 J 16 RES CHIP 1 16 5 CAP CER CP 0 1UF 16V F 2 27 BE 16 RES CHIP 47kOHM 1 16W 5 E 10UF 16V 20 RES CHIP 68kOHM 1 16W 5 RES CHIP 10 OHM 1 10W 5X RES CHIP 10 OHM 1 10W 5X RES CHIP 10 OHM 1 10W 5 RES CHIP 10 OHM 1 10W 5 RES CHIP 10kOHM 1 16W 5X RES CHIP 10kOHM 1 16W 5 RES CHIP 10kOHM 1 16W 5 RES CHIP 1kOHM 1 16W 5 RES CHIP 100kOHM 1 16W
29. 6563 253 6564 253 6565 253 6566 253 6569 250 5306 601 6983 125 5101 113 0020 601 7018 012 P00210 029 000016 NOM NM gt 1 On n Eb NNN 1 3 610 5424 CD DRIVE UNIT MEGA CD2 315 0760 10 LH5P832N 10 SOP SHARP 4 253 6651 BOTTOM CASE MEGA CD2 EXPORT 315 0677 IC TC51832FL 10 SOP TOSHIBA 5 253 6567 LED HOLDER MEGA CD2 315 0759 10 IC TC51832AFL 10 SOP TOSHIBA 10 601 6982 RUBBER FOOT MEGA CD2 11 601 6984 RUBBER DAMPER A MEGA CD2 315 5476A IC CUSTOM CHIP RF5C164A RICHO 12 601 7002 RUBBER DAMPER B MEGA CD2 EPR 15511 IC SEGA CD2 BOOT ROM EP 13 670 3119 LABEL SER NO SEGA CD2 S MPR 15511A 1 SEGA CD2 USA BOOT ROM S 13 670 3120 LABEL SER NO MEGA CD2 MULTI M EPR 15512 1 MEGA CD2 BOOT EP MULTI MPR 15512A 1 MEGA CD2 PAL BOOT ROM 14 670 0248 SEAL CUSTOMER SERVICE 14 670 2774 LABEL CAUTION LASER EUROPE 315 0635 IC MB8464A 10LL PF G BND FUJITSU 14 670 3349 LABEL CUSTOMER SERVICE SOC S 315 0637 1 MCOBHCOOOFNI2 PLCC MOTOROLA 15 670 3204 LABEL FCC SEGA CD2 USA S 315 0650 IC 068 000 12 PLCC HITACHI 15 670 3417 LABEL FCC SEGA CD2 CAN S 315 0626 IC TMP6BHCOO0T 12 PLCC TOSHIBA 16 670 3126 01 LABEL FDA MK 4101 USA 313 5190 MB3790 SOP
30. EMENT PROCEDURE Remove the GENESIS DRIVE Il from the SEGA CD II MEGA CD and unplug the power cord of the SEGA CD CD Il from the AC outlet Replace the CD drive unit Y Connect the power adapter and GENESIS DRIVE II Tum on the door close detection switch SW401 forcibly to turn the power switch on Check that the laser emits a beam for about 2 seconds and the pickup s object lens moves up and down Caution Be careful it is dangerous to look straight at a laser beam Do not bring your eyes too close to it Adjust the EF balance VR401 Adjust the tracking gain VR402 Check that an RF waveform of approx 1 5Vp p can be observed at 1 402 2 Replacement complete TABLE 7 TOC Total of Contents READ IN FLOWCHART 1 Power ON 1C403 pin SW501 ON 2 Pickup moves to inner edge Vref 3 418 Focusioperationtiming 1 1 403 0 Focus drive signal at 1 403 EN SW501 ON 3 Vref Iis 5 TER RAI 1C402 pin 5V 1V x AA Mas Focus error TP X1 dj LC 1 403 pin 401 pin 9 d lt Pickup lens moves up and down Sense 5V uw MP pe QV i 6 6 Focus servo ON Vref TN 6 Focused point 1 404 pin or 1C403 pin Focus 5V 7 Make a disc rotate 1 403 D y Servo ON Broken lines show that focus
31. RES CHIP 4 1 16W 5 RES CHIP 2 2k0HM 1 16W 5X RES CHIP 2 2k0HM 1 16W 5X RES CHIP 4 7kOHM 1 16W 5X RES CHIP 2 2k0HM 1 164 5 RES CHIP 2 2k0HM 1 16N 5 RES CHIP 4 TkOHM 1 16W 5 RES CHIP 4 TkOHM 1 16W 5X RES CHIP 330 OHM 1 16W 5X RES CHIP 10 OHM 1 16W 5X RES CHIP 330 OHM 1 16W 5X RES CHIP 10 OHM 1 168 5 RES CHIP 4 7kOHM 1 16W 5X Note S SEGA CD I 40 M MEGA CD I 476 1472 J 16 476 1472 J 16 476 1472 J 16 476 1222 J 16 476 1331 J 16 476 1222 J 16 476 1331 J 16 476 1750 J 16 416 1472 J 16 416 1750 J 16 416 1412 J 16 476 1472 J 16 476 1472 J 16 416 1412 J 16 476 1472 J 16 476 1331 J 16 476 1331 J 16 476 1472 J 16 476 1750 J 16 416 1750 J 16 416 1152 J 16 416 1122 J 16 416 1472 J 16 416 1822 J 16 416 1162 J 16 NOT USED 416 1162 J 16 476 1472 J 16 476 1102 J 16 416 2100 J 10 416 1103 J 16 416 1153 J 16 416 1102 J 16 416 1104 J 16 416 1103 J 16 416 1222 J 16 416 1103 J 16 416 1182 J 16 416 1223 J 16 416 1334 J 16 416 1184 J 16 416 1334 J 16 416 1224 J 16 416 1472 J 16 416 1334 J 16 416 1514 J 16 416 1103 J 16 416 1224 J 16 416 1332 J 16 416 1823 J 16 416 1105 J 16 416 1223 J 16 416 1104 J 16 416 1104 J 16 416 1104 J 16 416 1103 J 16 479 5007 J 16 476 2100 J 10 476 1101 J 16 416 1101 J 16 479 5007 J 16 476 1910 J 16 476 1103 J 16 RES CHIP 4 1 16W 5X RES CHIP 4 1 16W 5X RES CHIP 4 1 16W 5 RES CHIP 2 2kOHM 1 16W 5
32. SEGA SERVICE MANUAL 1 SPECIFICATIONS m n 2 IDENTIFYING PARTS HH 3 3 DISASSEMBLY pp 4 4 CD DRIVE ADJUSTMENT tn 6 5 CDINTERFACE Hh 8 6 CD DRIVE UNIT REPLACEMENT PROCEDURE 7 9 7 TOC READ IN FLOWCHART n 10 8 GUIDES FOR SERVICING tn 11 9 BLOCK DIAGRAM assis sas TS aeaii 15 10 SCHEMATIC DIAGRAMS M tnn 16 11 CIRCUIT BOARD DIAGRAMS t 18 12 PARTS SPECIFICATIONS MH 18 13 EXPLODED VIEW amp PARTS LIST rente rone 38 13 1 Exploded Wi 38 13 2 Mechanical Parts List ee 39 13 3 Electrical Parts List ccc 39 13 4 Accessories Package List MATIAS T E AO 0 9 0 0 9 0 Sega Enterprises Ltd 1 SPECIFICATIONS Ratings SEGA CD II MEGA CD II Operating environment Temperature 0 to 40 C Humidity 1096 to 80 RH no condensation Specifications RAM Memory 6M bit Program Picture data Sound data memory 512k bit PCM waveform memory 128k bit CD ROM data cache memory 64k bit Back up memory 1M bit CD game BIOS Boot ROM CD player software CD G compatible Stereo 8 channels PCM sound source D A converter Battery back up secondary duration nter clockwi Design and specifications are subject to change without notice 16 bit D A converter 8x internal over sampling digital filter PCM and CD sound mixing
33. View 33 23 E D WE 2 P7 MUTG O Digital muting control for CXD11670 RO gt 4 CLK Serial data transfer to CXA1082BQ and CXD1167Q L6 Pe DATA AA LS mam mm porase rio Ps u Ps TDBO B Muting DEMO LC RN Data bus with the host CPU 9 Muting output L during music Hs PI CDCK 9 CD mechanism control clock Lm MEER 29 POXS SUBQ 1 Q code serial data input 30 PoXSO Ne 31 01 5 SOCK O Serial clock to read Q codes O I 32 POXINT Nouse rag P3 Naa d C os Rete oa Ee E OSS 36 SCOR 1 Extemal interrupt request to read Q codes Interu CXA1082 CXD1167Q sensing input 40 P23 THOCK 4 P22 TESTI 1 Testinput H Normal L Test 42 P21 Focus OK signal input 43 SENS LI 44 P73 LDON O Laser diode on off LD ON lay in other modes t at the leading edge 35 lll Block Diagram TER qam 37 Po0 INTERVAL K Porro TIMER INTBT PROGRAM PIO PI COUNTERI13 JrorTi 3 T O PI3 O TIMER EVENT een COUNTER y porra Ka P20 P23 INTTO P30 P33 Aroma Lea
34. X RES CHIP 510kOHM 1 16W 5 RES CHIP 10 1 16W 5 RES CHIP 220k0HM 1 16W 5 RES CHIP 3 3kOHM 1 16W 5X RES CHIP 82k0HM 1 16N 5 RES CHIP 1MOHM 1 16W 5 RES CHIP 22kOHM 1 16W 5 RES CHIP 100kOHM 1 16W 5 RES CHIP 100kOHM 1 16W 5 RES CHIP 100kOHM 1 16W 5 RES CHIP 10kOHM 1 16W 5 RES CHIP 0 OHM 1 16 J RES CHIP 10 OHM 1 10W 5 RES CHIP 100 OHM 1 16W 5X RES CHIP 100 OHM 1 16W 5X RES CHIP 0 OHM 1 16W J RES CHIP 910HM 1 16W 5 RES CHIP 10kOHM 1 16W 5 Note All chip resistors and capacitors are 1 6 x 0 8 mm S M 9 M 416 1333 J 16 RES CHIP 33k0HM 1 16W 5 475 0075 RES C 2kOHM RADIAL 416 1474 J 16 RES CHIP 470kOHM 1 16W 5 416 1103 J 16 RES CHIP 10kOHM 1 16W 5 477 0152 RES PACK CP 8x4 7kOHM W COMM 476 2100 J 10 RES CHIP 10 OHM 1 10W 5 477 0152 RES PACK CP 8x4 7kOHM W COMM 476 2100 J 10 RES CHIP 10 OHM 1 10W 5 416 2100 J 10 RES CHIP 10 OHM 1 10W 5 151 0434 CAP CER CP 0 1UF 0 5V F Z 476 1103 J 16 RES CHIP 10kOHM 1 16W 5 150 0439 CAP E 10UF 16V 20 416 1103 J 16 RES CHIP 10 1 16W 5 151 0405 CAP CER CP 0 1UF 16V F 72 416 1103 J 16 RES CHIP 10kOHM 1 16W 5 151 0405 CAP CER CP 0 1UF 16V F Z 416 1103 J 16 RES CHIP 10kOHM 1 16W 5 150 0439 CAP E 10UF 16V 20 416 1103 J 16 RES CHIP 10kOHM 1 164 5 151 0406 CAP CER CP 100PF SOV SL J 41
35. and connections when the stop button is pressed Check the path between 1C403 G9 YES and 1 409 63 and also check 1 409 Check IC409 Is it 3V between IC409 and Does the following waveform appear at IC403 Page 10 9 Check the disc motor M501 and its connections Check the connection between 1 403 69 and 1C409 and also check IC409 Check IC401 and disc circuit 1 403 13 8 4 Feed Circuit Flowchart NO ae Check the power circuit Are 1C403 0 6 SV and 1C409 9V YES NO Can the TOC be read YES 32 Is it between 1 409 Can each track be searched OK 51 etween s Can each track be searched e Is it 4V bet 0 YES Does the following waveform the feed appear at 1C403 49 during search po Search outeredge Search inner edge NO ve Check the feed circuit 1 403 Does the following waveform appear between 1 409 and duri h NO Check the path between 1C403 Search outer edge Search inner edge and IC409 0 s W I YES Check the feed motor and its connections Fa YLT loe ER lt lo EC eg 4 Bigs oi erer So ce gt ic Is the pickup at the inner YES Does 1 403 08 SSTOP change YES most edge from 5V to OV when SW501 P U SW is set to ON from OFF NO Check the connection between SW501 and IC404 9 YES Check th
36. at the following pins are 3 1C403 EE 5 Y d Iz coook 1 603 21 1t 20 gt heaps Yet yo i Sour e Tor c CH driver PIDE ec bul S vad Or gt faulty 14 101 CUSTOM CHIP IC MCE3 Parts No 315 5632 Top View No WO Pin Name v ai se 1 HRQ 8 1 IDXM 88 1 ICDCK 89 O OXPCM 1 IDTEN 9 TI WAIT OHRD No yo Pin Name 148 10 BD9 149 10 BDIO VO BDI i8 UO BD 15 10 Bbi4 CI T Va 15 VO BDI 71 IO BPRAO 157 IO BPRAI 158 UO BPRAZ 164 Vs No vo We VO Hk a ES Sep 167 OPRRAS 1 O 5 2 O OBRAM 4 OOWE 168 OPRCAS 3 Vs 4 vo BOADO 107 169 O OPRUWE 4 1 OXBROM 46 VO BOAD 170 OPRLWE sS 1 IRM 1 VO Wal 1 ICASO 48 1722 VO A2 7 I HWR 173 10 T NAS B X IUWR 174 10 4 1 lASEL 0 Vo IRAS2 H i 12 1 52 13 i j CH I 175 TO NAS IVAII IVA12 IVA13 IVA14 IVA1S La 9o
37. ge List 1 610 5507 1 610 5574 400 51008 400 51008 01 400 5122 400 5127A 400 51284 N PPN 600 6201 eO 1 0 n ba w T S 000 00410 671 3240 01 671 3240 03 671 3240 05 1 671 3240 06 12 672 1257 12 672 1332 12 672 1258 01 13 671 3322 01 13 671 3322 05 13 671 3322 03 13 671 3322 06 14 670 3211 14 670 4106 15 670 3311 15 670 3327 16 SGM 4218 17 SGM 4245 19 SGM 4207 20 SGM 4220 21 670 3265 22 672 1473 22 NOTE Accessory Provided ASSY CD ROM MDP ROAD AVENGER ASSY CD ROM GEN W SEWER SHARK AC ADAPTOR ACI20V DCIOV 1 2 AC ADAPTOR 120 0 10 1 2 M S S S ADAPTOR AC230V DC10V 1 2A EXCEPT U KUWAIT AUSTRALIA amp NEWZEALAND AC ADAPTOR AC240V DCIOV 1 2A FOR U K KUWAIT AC ADAPTOR AC240V DClOV 1 2 FOR AUSTRALIA amp NEWZEALAND STEREO MIXING CABLE W CORE AUDIO RCA CABLE L 2M UNION ASSY SPACER MEGA CD2 EXPORT HOLD PLATE SPACER MEGA CD2 A RETAINER BRACKET CD2 EXPORT CONN PLATE A ACCESSORY CD2 EXP CONN PLATE B ACCESSORY CD2 EXP M SCR FH 4 10 MA CTN SEGA CD2 USA E FOR MK 4101 CTN MEGA CD2 MULTI 4180 FOR MK 4180 MA CTN SEGA CD2 CAN 4101 22 FOR MK 4101 22 CTN MEGA CD2 MULTI 4182 FOR MK 4182 OPERATION MANUAL CD2 USA OPERATION MANUAL CD2 CANADA OPERATION MANUAL CD2 MULT 01 BOX amp PACK oi CD2 USA FOR MK 4101 BOX amp PACK SET CD2 CAN 4101 22 FOR MK 4101
38. illoscope Adjustment jig Probe 10 1 50mv div 1ms div Test CD 2 EF balance adjustment 2 voltmeters Generator Adjustment jig Test CD 3 Tracking gain adjustment e t eliy Faults due to incom Adjustment procedure plete adjustment Purpose It takes more time to search for each track Short both terminals of C410 To reproduce or connect TP D and GND a reference Adjust variable resistor clock signal VR403 so the frequency of during CD the signal at test pin PLCK is play 4 320 0 05MHz Small No play pos sible Press TEST switch twice to To adjust the set to Test Mode 2 center of the tracking error Playability of dirty discs and scratched comes poor Adjust VR401 so that peaks A and B of the output waveform shown above are equal It becomes impossible to search for each track Becomes susceptible to shocks It becomes impossible to search for each track on dirty and scratched discs To adjust the Connect as shown above Press TEST switch three times to set to Test Mode 3 and supply a 1 0kHz 0 15Vrms signal from the generator Adjust VR402 so the 2 voltmeters read the same value Playability of dirty discs and scratched discs be 5 CD INTERFACE 5 1 CD Drive Block Diagram 2 d 4 5 ws 500mv div 5 u s div 200mv div 50ms div 50mv div 50ms div 2us div 2v div 1 s div O D i 500
39. lect inputs ss xo o Crystal oscillator output The frequency is determined as 8 4672MHz or 16 9344MHz during double speed play by the mode select inputs 55 MDI 1 Mode select input 1 KIRO MERIO UC OO A ogg 8 SLOB Input to switch the audio data output code L complementary output H offset binary out so PSSL I Input to switch the audio data output mode L serial output parallel output 60 APTR O Aperture correction control output R ch 61 APTL Aperture correction control output H L ch 62 DAO O DAO LSB of parallel audio data output when PSSL is H CIFI output when PSSL is 63 DAO2 O DA02 output when PSSL is H CIF2 output when PSSL is L 64 DA03 O DA03 output when PSSL is H C2F1 output when PSSL is L 765 DAO4 O DA04 output when PSSL is H 2 2 output when PSSL is L 66 Daos O DAOS output when PSSL is H C2FL output when PSSL is L 67 Da DA06 output when PSSL is H C2PO output when PSSLis 68 DA07 O DA07 output when PSSL is H RFCK output when PSSL is L 69 Daos O DAOS output when PSSL is H WFCK output when PSSL is L 70 DA09 O DA09 output when PSSL is PLCK output when PSSL is L 71 DA10 output when PSSL is H UGFS output when PSSL is L 72 O output when
40. mv div 50ms div 50mv div 2s div 100mv div 100ms div 100mv div 50ms div 200mv div 500mv div 17 2 13 500mv div 500ms div 200mv div 2s div 500mv div 50ms div v501 P US epee D a 21 10403 CXA1082 01167 1401 05 Puce 15 wm wo 0 5 2 Description of CD Interface Signals Function Fin Error flag Outputs H when a data conection is disabled 215219 S o BCLK O Bit clock O Serial data output LRCK O L R channel identification clock 1 40 O 16 9344MHz output EXCK Sub code read clock SBSO Sub code data SCOR Sub code sync L MUTE o Outputs L when playing back DM music and H in other modes TG O iempreqes CDCK CD mechanism control commu nications clock HOCK DB 1 A cL SERRE jej e jejejejejeje L Ip Ip pu o oe A 5 gt AR 5 Host communications clock Data bus 0 Data bus 1 Data bus 2 n SIS Gad SR 3 S A 1 O Daabus3 IC404 3 RESET 1 Resets the CD hardware 1C404 amp 5 3 CD Interface Connection Reference Diagram DATA Serial data PROCESS communications 1C401 CXD1167 Sub code communications Audio control signal MECHANISM lea CONTROL UP T DBUS 4bit 1C404 UPD75006 Host communications 6 CD DRIVE UNIT REPLAC
41. ng signal input normally set to 113 TEST Test pin normally set to L Operation mode setting pin PULL DOWN 20 Test pins normally set to L TEST PULL DOWN 22 DGND Ground of digital circuits Clock output 23 CLKOUT 392Fs 1 2 XOUT 384Fs 448Fs 512Fs XOUT an TT casal oscilatorinpue OO 55 O Cops oscillator ouput Cas AGND Ground of analog cireuits 27 Reference voltage L input Ez O DACCH2eww 26 IC202 16Bit D A Converter IC LC78815M View 20 11 1 10 li Description Fe vane ep RE neme uo E _2 REFH Reference voltage H 3 Reference voltage H input AVDD Supply voltage of analog circuits 75 1 LR clock word clock input 76 DATAL 1 Digital audio data input 14 MOCE2 7 DATAR 1 Digital audio data input JUST DGND Ground of digital circuits BCLK 1 Bit clock input 16 REFL Reference voltage L 79 SYSCLK 1 System clock input Li7 AGND Ground of analog cirenits _ e ovon ompi vores otc 20 CH20UT O L Digital audio data is input from the DATAL and DATAR pins simultaneously H Digital audio data is input from the DATAL pin by time sharing
42. r installation section in the directions of the arrows to release the bosses Gu NC M NK Stoppers x 552 748 SS A e ES id Pw OS gt p SAA E A p ao Zeg Door Knob Screws 7 1 3 2 Top Case Assembly Removal kwa E 1 Turn over the unit and remove six 6 screws from A N Bosses the bottom 2 Do not remove the bottom case in this state Be sure to turn over the unit again and then remove the top case in the original state Bottom Case 4 lt ES 3 4 Dismantling the Chuck Disk Assembly 1 Remove the chuck disk assembly See item 3 1 2 Remove the screw and release two 2 stoppers The connector plate magnet chuck holder and chuck disk come apart on their own Connector Plate Magnet Ring Chuck Holder 0 Stoppers Chuck Disk 3 5 CD Drive Unit Removal 1 Remove the top case assembly See item 3 2 2 Disconnect three 3 connectors and lift the CD drive unit CD Drive Unit 3 6 Circuit Board Assembly Removal 1 Remove the top case assembly See item 3 2 2 Remove five 5 screws holding the shield plate 3 Disconnect three 3 connectors from the CD drive unit 4 Remove two 2 screws holding the circuit board assembly Screws Circuit Board Assembly 4 z 3 7 Door Lever and Door Knob Removal 1 Remove the top case assembly See item
43. s is engaged Dotted line When focus is not engaged YES Check focus circuit IC403 12 Does the waveform shown below appear between 1C409 7 and Approx 7V Check the connection with the pickup NO Check the pickup dirt on lens laser is output and tracking circuit IC402 YES Does the waveform shown below appear between IC403 7 and FEO Pin Vref FEO Focus Error Out YES Check the path between IC403 5 and IC409 46 1C403 faulty 8 2 Tracking Circuit Flowchart NO Are IC409 D 2 3 9V Check the power circuit YES YES N Y Is the TOC read Page 10 O NO Check the pickup dirt on lens laser power 90 120 W and tracking circuit OK Proceed to the feed circuit flowchart Does the waveform shown below appear at TP X Servo OFF rar 1 Servo ON Does the waveform shown below appear at 1C403 j Servo OFF Servo ON Vref 8 3 Disc Circuit Flowchart Check tracking circuit IC403 ES NO NO YES Tracking is OK Proceed to the feed circuit flowchart NO Are IC409 Q 9V Check the power circuit YES NO Is the disc stopped in the stop mode Is 1C403 69 2 5V NO Does the disc turn 1 2 seconds after 5 401 is set to ON from OFF Does the disc stop immediately when the stop button is pressed YES Check the disc motor M501 and its YES Is it 3V between 1 409 3
44. the 8 bit shift register serial data from CPU in each register 15 DATA 1 Serial data input from CPU 16 XRST 1 System reset input Reset when L is input 17 CNIN 1 Tracking pulse input m O O 5 18 SENS O Outputs the internal state according to the addres Muting input When ATTM of internal register A is L MUTG L causes the normal state and MUTG H causes muting 20 CRCF O Outputs the CRC check results of subcode Q 21 EXCK I Clock input for serial output of subcodes O Serial output of subcodes 23 SUBQ O Subcode Q output Pi No 24 SCOR O Subcode sync SO 51 output 25 5 Subcode Q reading clock 2 1 DOTX O Digital output WFCK is ouput when DO isot Se GES Oupurto display the frame syne locked state 33 Name yo Function Fixed at or L do not set to open La LA gt AN 3 00 Fixed at or L do not set to open SES Lol 9 N A 5 CAM O Crystal oscillator s frequency divided output f 4 2336MHz 8 4672MHz during double speed play A A o 53 Crystal oscillator input The frequency is determined as 8 4672MHz or 16 9344MHz during double speed play by the mode se
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