Sega CD v1
See also:
- Sega CD v2: Funai for Funai-produced v2 top-loading Sega CD
- Sega CD v2: Sony for Sony-produced v2 top-loading Sega CD
IC Information
837-8953 IC BD MEGA-CD SUB BD EXPORT (171-6327B)
- IC1: DAC (CD Audio): LC7883KM
- IC2: DAC (315-5476A): LC7881M
- IC3, IC4, IC5: C844G
- IC6: +5 Regulator: NEC 2405
837-8952 IC BD MEGA-CD MAIN BD EXPORT (171-6326B)
- IC1: CPU: MC68HC000FN12
- IC2: 315-5548
- IC3: PCM Sound: 315-5476A
- IC4: ROM: MPR-15045B-T
- IC5: DRAM: 424270-80
- IC6: Battery Backup IC: MB3790
- IC7, IC8: VRAM: TC611664Z-80
- IC9: HC245
- IC10, IC11: SRAM: 65256BLFP-10T
- IC12: 74AC86
- IC13: CDROM LSI: LC89515
- IC14, IC15: SRAM (CD-ROM Decoder): MB8464A-90L
- IC16: SRAM (Save Game): MB8464A-10L
- IC17: 74AC74
Sony CDROM PCB KSK-1200A
- IC100: OpAmp: L358
- IC101: CD DSP: CXD2500AQ
- IC102: MCU: CXP5084
- IC103: CD Servo: CXA1372AQ
- IC105: BTL Driver: BA6294
- IC10?: Driver: AN8377N
Laser: KSS-240A
JVC CDROM PCB EMW10258 / ENN-335A-1
- IC501: ???
- IC502: CD Servo: CXA1372Q
- IC541: BTL Driver: BA6393FP
- IC551: Bridge Driver: TA8409F
- IC691: CD DSP: CXD2500AQ
- IC???: MCU: HD614089F
Laser: Optima-5S
Capacitor Lists
Japanese Mega CD (Early Production)
837-8046-01 SUB BD C1 10uF 16v C2 10uF 16v C3 10uF 16v C4 10uF 16v C5 10uF 16v C6 10uF 16v C7 10uF 16v C8 10uF 16v C9 10uF 16v C10 10uF 16v C11 10uF 16v C12 10uF 16v C14 10uF 16v C15 10uF 16v C24 100uF 6.3v C25 100uF 6.3v C26 100uF 6.3v C27 100uF 16v 837-8015 IC BD MEGA-CD MAIN BD C9 10uF 16v C10 10uF 16v C11 10uF 16v C12 10uF 16v C13 10uF 16v C23 10uF 16v C26 100uF 6.3v C28 10uF 16v C31 10uF 16v C37 10uF 16v C41 10uF 16v C42 10uF 16v C46 10uF 16v C48 100uF 6.3v C53 10uF 16v 837-8327-01 IC BD MEGA-CD CONNECT BD C2 47uF 6.3v C4 10uF 16v C6 10uF 16v
US/EU Sega CD & Mega CD
(Sony CDROM) Purchase these parts as a kit with leaded capacitors or with SMD capacitors
(JVC CDROM) Purchase these parts as a kit with leaded capacitors or with SMD capacitors
IC BD MEGA-CD SUB BD EXPORT (837-8953)
C1 10uF 16v C2 10uF 16v C3 10uF 16v C4 10uF 16v C5 10uF 16v C6 10uF 16v C7 10uF 16v C8 10uF 16v C9 10uF 16v C10 10uF 16v C11 10uF 16v C12 10uF 16v C13 10uF 16v C14 10uF 16v C40 100uF 6.3v C41 100uF 6.3v C42 100uF 6.3v C43 100uF 16v
IC BD MEGA-CD MAIN BD EXPORT (837-8952)
C41 10uF 16v C42 10uF 16v C43 10uF 16v C44 10uF 16v C45 10uF 16v C46 10uF 16v C47 10uF 16v C48 10uF 16v C49 10uF 16v C50 10uF 16v C51 100uF 6.3v C52 100uF 6.3v
Sony CDROM PCB KSK-1200A
C203 4.7uF 50v C204 33uF 16v C202 33uF 16v C205 10uF 50v C206 33uF 16v C201 100uF 10v C200 .47uF 50v C207 330uF 16v C208 330uF 6.3v LASER 100uF 6.3v
JVC CDROM
Motor PCB EMW10318-001 / ENN-370A C002 47uF 16v CDROM PCB EMW10258 / ENN-335A-1 C502 47uF 6.3v C510 47uF 6.3v C535 4.7uF 25v C541 220uF 10v C544 10uF 16v C548 47uF 6.3v
Schematics
Taken from the service manual. Note that these are based on the original Japanese hardware. There are minor layout and part number differences in US/EU units.
MAIN BD 1: CPU, ROM, RAM)
MAIN BD 2:ASIC, VRAM, 25P CD Connector
MAIN BD 3:PCM Audio & RAM
MAIN BD 4:LC8951 CD Processor, 21P SUB BD Connector, Edge Con
SUB BD
CONNECT BD
Service Manuals
Mega-CD Maintenance Manual, Export, August, 1992, Rev A
Sega Service Manual - Genesis, Mega Drive PAL, Mega CD / Sega CD, No 010, April, 1994.
Parts specifications only for VA7 Genesis, VA6.5 PAL Mega Drive, and Mega CD / Sega CD