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1 IIU SERVICE MANUAL genesis II I MEGA DRIVE II (PAL-8/1/G, RGB) NO. 001-2 ISSUED DECEMBER, 1993 SUPPLEMENT {Version 1) CONTENTS 1. DIFFERENCES BETWEEN AND 2 1-1. Schematic Diagram 2 1-2. Differnce Table and Parts List 3 2. SCHEMATIC DIAGRAM (Version 1) 5 3. CIRCUIT BOARD DIAGRAM (Version 1) 11 4. PARTS SPECIFICATIONS 20 Sega Enterprises, Ltd. BEFORE USING THIS SERVICE MANUAL This service manual includes the MEGA DRIVE II / genesis II Ver. 1 data. 1. DIFFERENCES BETWEEN AND 1-1. Schematic Diagram IC2 &3 IC2 IC2_ '" ro' VA oo 00 v VA 00 " v VA 9 ~ v VA AO VA A1 D! v 2 VA ., 01 v v 7 A2 D2 ' V' VA< 7 A2 02 . , v VA A3 03 v VA A3 03 6 vo .. D4 .. 04 VA A5 D5 7 v VAS.}

2 , 05 v VA7 4 A6 06 'VA7 4 46 06 v . VAO 3 47 D7 9 v 7 VAe 3 A7 07 9 v v 40 VA AO VA . 49 VA 4 VA' 410 VA 410 VA .. 3 4U VA' 3 .. v A12 VA .. ~ A13 H . A12 VA A13 AlA VA 5 A14 FIASC 20 so 20 i:f: i:f: N < LWR 27 C'"-UWR 27 C'"-WE ~ WE ~~ U u4<oo2-15 Li UPD42032-1 YC3 ~ ~ ~SED m m IC2 YO AO IOl vee ., 102 v < A2 103 . v 43 IO VOA A4 lOS ' 45 IOO v 46 107 v 47 Ice v 7 40 Ice 40 1010 v 410 1011 : v 411 l01i! .,. 410 1014 7 v 414 101!5 .. "" l01!i . :Jl .. U<>U=.Lt . c LOE/R~S~ Nn LMP15323 ~~ IC7 & 8 IC7 IC7 on IC7 ADO 23 I ~:/01 ! : 1 ADO AO 8101 , " ., l/02. - 40 ., Sl02 .--A AR Sl03 . A'' A2 I/03 -3 -, 7 A3 I/04 .. A3 SID .. SICS " .. " ""' A SICS 7 s < .. SI/01 -. A Ae SI07 A 7 .. SI/02 ' s::2 7 Sl/03 A7 SI08 sc 7 SI/041 AM lli'1/l01 .. ~ .01 7 CA .. 4 SA.>. lf2/I02 --<:AS. AS 4 ~ llf3/I03 IU/C .. c.!/ DE . 1114/IO wa/wE: . A 2 WS/TOS oc SOE A WS/108 Ill:.. '<17/107 .. UP04111264 ZIF WS/108 reo .. SM54CB A . 40 l/01 404.

3 A1 I/02 A . 42 1/03 4 7 43 1/04 A .. " n .. SI/01 ] c ~ 46 S!/02 c 7 47 Sl/03 4 r i< i<, 1" .. sc Sl/04 7 7 . 4 =-. 4 .. ~ l . <U/OE * lOOP 33P SOOP ! SOE UP04l1264 LlF' C15 ("""'"~! ~ 7 ,. ( JOOP t m -2-. 1-2. Difference Table and Parts List Circuit Ver. o No. Part No. Description Part No. 837-9602-S IC BD MD2 VAOS USA (CBA) 837-9793-S 837-9602-SM IC BD MD2 VAOSM USA (CBA) 837-9793-SM 837-9602F IC BD MD2 VAOF USA (CBA) 837-9793-F 837-9603 IC BD MD2 V AO EUR (CBA) 837-9794 IC2 315-0547-10A IC HM65256 BLFP-10 SOP 315-0810 315-0677-A IC TC51832FL-10 SOP 315-0811 315-0759-85A IC TC51832 AFL-85 SOP 315-0812 315-0759-1 OA IC TC51832 AFL-10 SOP 315-1819 315-0760-12A IC LH59P832N-12 SOP IC3 315-0547-10A IC HM65256 BLFP-10 SOP NOTHING 315-0677-A IC TC51832FL-10 SOP 315-0759-85A IC TC51832 AFL-85 SOP 315-0759-1 OA IC TC51832 AFL-10 SOP 315-0760-12A IC LH59P832N-12 SOP IC7 315-0515 IC M5M4C264L-12 ZIP 315-0795-80 315-0515-15 IC M5M4C264L-15 ZIP 315-0820 315-0453 IC UPD41264V-12 ZIP 315-0850 315-0423 IC MB81461-12 ZIP 315-0481 IC HM53461ZP-12 ZIP 315-0525 JC TMS4461-12 SDL ZIP 315-0616 IC V53C261Z10 ZIP 315-0622 IC KM424C64Z-10 ZIP 315-0623 IC MSM51C262-IOZS ZIP 315-5543 IC KM424C64Z-12 ZIP IC8 315-0515 IC M5M4C264L-12 ZIP NOTHING 315-0515-15 IC M5M4C264L-l5 ZIP 315-0453 IC UPD41264V-l2 ZIP 315-0423 IC MB8146l-12 ZIP 315-0481 IC HM53461ZP-12 ZIP 315-0525 IC TMS4461-12 SDL ZIP 315-0616 JC V53C261 ZIO ZIP 315-0622 IC KM424C64Z-10 ZIP))

4 315-0623 IC MSM51C262-IOZS ZIP 315-5543 IC KM424C64Z-l2 ZIP CEI 150-0418 CAPE 10UF 16V U-TYPE L=5MM 150-0023 CE33 NOT USED NOT USED 150-0062 C11 NOT USED NOT USED 151-0372 C30 151-0309 CAP CER CP 180PF 50V CH2125 151-0354 NOT USED C61 151-0265 CAP CER CP 25V ZF2125 151-0336 C63 NOTHING NOTHING NOT USED R42 476-2472-J-1 0 RES CHIP 1!10W 5% 476-2752-J-10 R43 476-2472-J-1 0 RES CHIP 1/IOW 5% 476-2752-J-10 R44 476-2472-J-1 0 RES CHIP 1/lOW 5% 476-2752-J-1 0 R45 476-2472-J-1 0 RES CHIP l/10W 5% 476-2752-J-1 0 R81 476-2682-J-1 0 RES CHIP 1/lOW 5% 476-2472-J-1 0 - 3 --Ver. 1 Remarks Description IC BD MD2 VAlS USA (CBA) IC BD MD2 VAlSM USA (CBA) IC BD MD2 VAlF USA (CBA) IC BD MD2 VAlEUR (CBA) IC LH5P1632N-15 SOP40P IC LC331632M-12 SOP40P IC HM651632 DFP-15 SOP IC TC511632FL-10 SOP NOTHING IC MSM54C864-80JS SOP40P IC KM428C64J-10 SOJ IC HM53861J-8 SOJ NTSC-F 1 I i I NOTHING CAPE 10UF 16V U-TYPE 20% CAPE 47UF 10V U-TYPE PAL CAP CER CP 33PF 50V KB2125 CAP CER CP lOOPF 50V CH2125 PAL NOT USED NTSC-SM CAP CER CHIP 12PF 50V PAL NOT USED PAL RES CHIP 1/IOW 5% RES CHIP 1/IOW 5% RES CHIP 1!

5 10W 5% RES CHIP l/10W 5% RES CHIP 1/IOW 5% CAUTIONS WHEN REPLACING PARTS Four ICs shown in the table below are assigned as the service parts for IC6. No. Parts No. Description I 3I5-S660 IC CUSTOM CHIP FCI 004 REV. YAMAHA 2 3I5-S660-02 IC CUSTOM CHIP FC1004 3 3IS-S660-0 I IC CUSOTM CHIP FCI004 ArvU 4 31S-5708-0 I IC CUSTOM CHIP FCI004 AMK If one of numbers I-4 is used for IC6, mount CI, C4 and CIS according to the following table. No. Parts No. Description CI 1S1-0316 CAP CER CP 20PF SOY J CH 212S C4 ISI-0363 CAP CER CP 47PF SOY CH 212S CIS 476-2102-J-10 RES CHIP IkOHM 1/IOW S% -4-IC6 X X X X X X x : NOT MOUNTED 0: MOUNTED 0 X 0 0 0 X 2. SCHEMATIC DIAGRAM (Version 1) 2-1. Schematic Diagram-1 F E 0 c B I~ IC7 AO A> A2 A3 Wl/1:01 W2/I02 W3/I03 W4/I04 W:5 W6/I06 11117/I07 We/ICJ8 c .. s 1 I~ ;:f;: C15 ;::f;: C16 ;::f;: ~17 ;: F C16 * 100,.;> 3~P lOOP rh F137 HS60 1 IC 1 ,~~ VCLK IS VPA l~=t====tii~PLC0t::~27 !PLO IPLl tPL2 41 A2 A3 .. A:5 A6 A7 e A9 uo Al! >.

6 12 A13 AH A15 A16 A17 ue 419 A20 A21 A22 A23 C12 R15 ~~ I I I v 00~ II c ..a:K I i I " E 0 ,--. -RA6 -lOOL.'HM " ~2! 11 '(( '((( '(( ( IVIVI' 1 VIVIVIVIVIVIVI' IVJv 1"11. Iii 1,,5111~~~~ I " A.~ 33P,.16 I ""' v :::;::::: C2 33P IC2 AO '!01 . !02 !03 A3 'I04 A4 !05 !06 A6 !07 A7 toe "e res I01C I011 '1012 12 !CH3 A13 !014 A14 !015 1 I 00 01 02 03 04 OS 06 07 oe 09 .. s, 30 !016 ~~~~~ -~:::~~ ~ LWR LOE ".::tFSio-1 NnF U96323 A HALT ;::jESET AS uos LO~ R/" seooocc 010 011 012 013 014 01:; 2 -5-F~.nno I' i rr C4 * l\ ri7 3 FB13 4 I~ VMe sso -YYC YNNL. SCCK PPPPPPP 0123456 T"TTT ~I!:EE rH 0123 ., 19 ..a. onrn '" ~ CASO voo V01 IC4 .. 24 '" Jg"~'"'>F~r'~'ij"' MREQ IO~G "" RD ~ . R~FSH ,., .. Lr 1'--= w T!..L T_.~LLj wAIT I':=~Itlti' N '=:::tt:l ~~ f , .. s "'" ?I>Cl ~~ 5 V02 V03 V0A vo" lT ~g~ vee Y010 V011 ,;~~ * ~g~~ ~ Sll1L-,.---voe I '"'ji K~~~~-im ~ Z~ f"OC ~ FRI!:S "~ ~~~K ;:: ::::: C9 ""3 Al2? SR3 ~ * '-S~Al:l2L---~------~ ~~DSR2 =~ ..! Zlia ~ ZRAH Z0'7 zoe ZO" ZO ZO:!))))))))

7 I Z02 Z01 zoo ZA1!5 ZA13 ~: ~~ ti~::::l~:t:~ Z410 Z49 Z46 ZA'7 ZA6 ZA" ZAA ZAll ZA2 ZA1 S ZAO .. s CAl! ~&'i FC1004 (SGE.: R12 6 ;::f;: C7 100P R11 r. 1 l_ -~ RA7 ~0H""t "' 8 IC5 AO .. A2 A3 A4 "" .. a .. , .. e A9 A10 A11 A12 6--~ llvuo VA11 VA13 VA14 VA15 caaz. I"OWR VAle f'--'lll=i"" "IIJ" ~ Sl-:!1 ~~~ __ o------~ ~Sl-2 -60P CON CN3 VA& VAll YA7 VA12 YA6 VA13 VAS VA1A VA4 VA3 VAlliS VA2 VA1 IIII!II~II!!!!!!!!!!!!!IIIIIVO? voo vee vos Y01 V09 vos V02 Y010 Y04 V03 V011 7 lil-J,._ .. ~es SR1 VA9 VA18 VA2&! ' !3 :(.S__ = HSYNC ~ ~ ~ .. ~ l !; !.. QIAJS,. :::.AS2 V01~ V014 V013 = ~ Uili. Uljfl ::.. O::A."T 64P CON 8 * Difference Table for Diagram - 1 CIRCUIT genesis II GRID MEGA DRIVE II No. TYPE-S TYPE-F TYPE-SM CI A-I 20pF .. * 1 20pF *1 20pF * 1 NOT USED C4 A-3 47pF *2 47pF *2 47pF *2 NOT USED ! C9 I D-6 NOT USED NOT USED NOT USED 47pF CIO I C-5 I NOT USED NOT USED NOT USED IOpF I l CI5 I D-1 IK *3 ! IK *3 IK *3 NOT USED OSCI I C-5 I I Notes: * I To be mounted when part or 315-5708-01 is used for IC6.))

8 * 2: To be mounted when part is used for IC6. * 3 To be mounted when part is used for IC6. 2-2. Schematic Diagram-2 IC1 r-----------~ 1------------ IC6 IC2 r-----, 1 vee:. 1 1--=: .. '"'o y I I I I l _____ _J IC5 r-----1 '1-~: P' y . ! ' I I l _____ _J -----------r IC4 ~--------, IC7 ,--------, , _~_-___ 1 l VCC:1 I : vr vr 5 1 I ~ 1 CE21 C41 I . CE22T c: .. ~ 10u 0. 0 10u 0 .01!2u I I I I I I TC45 I C .022u r: L _____ _; l _____ __! I rf7 I L _____ j CN3 r----------., I : bT=~ :f ;;~ r ~;~s 1 A Ate I I :r I CN2 ,---------------1 J +9V Tl' &20 820 + CE27 C44 47u 1;:.022U A3C I VCC1 <;> T~ TP I &25 825 L! .. 1!!2 l _____ j -----------------------------------~ I I I I 1-~ }-~ FF m 1 .. F < ~ c:s 1 "' [_-------------------------------------- -------------~ 2 3 -7-F E D c B A 4 2-3. Schematic Diagram-3 F E 0 IC11 ~------, I vvcc 1 L: I I I 1s 1 1 CE2!1 T 100u irl: 2< I I I I I l _____ _! CN1 r---------~ I Vl E"<~ I~ ' l.,. o. -1 I I I ! I l_ _____ j cr.]

9 :s ----------------- --------------1 I I 1J e ~~ I I L------------------------------ L R * Difference Table for Diagram-4 c CIRCUIT! GRID genesis II MEGA DRIVE II No. 1 TYPE-S TYPE-F TYPE-SM ICil E-6 CXAll45M MB3154PF KA2195D MB3514PF C29 I D-7 11 F 11 F NOT USED 11 F C32 E-D !80pF !5pF NOT USED 15pF C57 D-5 NOT USED JOOpF NOT USED JOOpF - -- C62 D-7 I NOT USED NOT USED NOT USED 12pF CE14 D-6 10 11 F 220 11 F 10 11 F 220 .U F 8 R47 E-6 12K NOT USED 12K R54 D-6 24K NOT USED 24K NOT USED R55 D-6 lK !OK NOT USED !OK R57 D-7 3300HM 3300HM NOT USED IK R6l E-5 !OK !OK L2 E-7 100 11 H 100 .u H NOT USED 100 11 H L3 D-7 12 11 H 12 .u H NOT USED 12 .u H L6 D-7 NOT USED NOT USED NOT USED 100 .u H A 2 3 8-4 3. CIRCUIT BOARD DIAGRAM (Version 1) 3-1. Main F Circuit Board (Top View) -For genesis II E D c B A 2 3 4 5 6 11-* Difference Table CIRCUIT GRID No. C9 8-4 CJO C-4 CIS C-2 C32 E-2 C57 E-1 R47 E-2 R55 E-2 X: Not Mounted 0: Mounted 12-TYPE-S X X RES IK 0 X 0 0 TYPE-F TYPE-SM X X X X RES IK RES IK 0 X 0 X 0 X 0 X 7 8 3-2.

10 Main Circuit Board (Bottom View) -For genesis ll -F E 0 c. B A 2 3 4 5 6 7 8 -13--14-3-3. Main Circuit Board (Top View) - For MEGA DRIVE II -F * Difference Table CIRCUIT GRID MEGA DRIVE IT No. Cl C-4 X C4 E-3 X E CI5 C-2 X R54 D-2 X X : Not Mounted D c B A 2 3 4 5 6 7 B -15-16-3-4. Main Circuit Board (Bottom View) -For MEGA DRIVE II -F E D c B A 2 3 4 5 6 7 8 17--18-MEMO 4. PARTS SPECIFICATIONS ------ -r-------------------------------------- ---------------------------IC2 315-0810 1 IC LH5P1632N-15 SOP40P ----------- Top View & Pin Layout Pin Name Vss1 Pin Name Function ---------------------------------------- ------Ao-A7 Address input SI08 SI07 SI06 RAS Row address strobe CAS Column address strobe SI05 ~ w811o8 DT/OE Data transfer/output enable W7II07 w611o6 WB/WE Write bar bit/Write enable W/101-Write mask/data I/0 WaflOs W4!104 1 1 w511o5 Vee1 11 Vss2 WBfiiE NC NC sc Serial clock CAS SE Serial enable NC Ao SI01-SI08 Serial data 1/0 VecfVss Power supply (SV)/ Ground A1 A2 A4 1 A a NC Not connect~d Vee2 - - -- ------------ --------------------------- ---------- -- -- ----------------------------------- Bloc~ Diagram Vss Vee zen a: a: ::Eenw w ::Jw~ ~ COLUMN DECODER ~~ Wtfl01.