Sega GENESIS II User manual

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 Ver.O AND Ver.1·····························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 Ver.O AND Ver.1
1-1. Schematic Diagram
Ver.O IC2
&3
Ver.1 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
.,
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!
.,.
IOJ.3
410 1014
7 v
414
101!5
•... ""
l01!i
.
c.E._
:Jl
......
U<>U=.Lt
.
c••
LOE/R~S~
Nn•
LMP15323
~~
Ver.O IC7 & 8 Ver.1 IC7
IC7
on
IC7
ADO
23 I A.O
~:/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
a.u. 7
CA
...
4
SA.>.
lf2/I02
--<:AS.
AS 4
~
llf3/I03
IU/C£.
.
c.!/ DE .
1114/IO• wa/wE:
.-
OLE._
A • 2
WS/TOS
oc
SOE
A
WS/108
Ill:.
•
.
'<17/107
..
UP04111264 ZIF
WS/108
reo
.. SM54CB•A
.
40
l/01
404
.
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
OLE._
!
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 HM65256BLFP-10 SOP 315-0810
315-0677-A
IC TC51832FL-10 SOP 315-0811
315-0759-85A
IC TC51832AFL-85 SOP 315-0812
315-0759-1
OA
IC TC51832AFL-10 SOP 315-1819
315-0760-12A IC LH59P832N-12 SOP
IC3 315-0547-10A
IC HM65256BLFP-10 SOP NOTHING
315-0677-A IC TC51832FL-10 SOP
315-0759-85A IC TC51832AFL-85 SOP
315-0759-1 OA
IC TC51832AFL-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 TMS4461-12SDL 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 TMS4461-12SDL ZIP
315-0616
JC V53C261ZIO ZIP
315-0622
IC KM424C64Z-10 ZIP
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 180PF50V CH2125 151-0354
NOT USED
C61
151-0265 CAP CER CP 0.1UF 25V ZF2125 151-0336
C63 NOTHING NOTHING NOT USED
R42 476-2472-J-10
RES CHIP 4.7k0HM 1!10W 5% 476-2752-J-10
R43 476-2472-J-1 0
RES CHIP 4.7k0HM 1/IOW 5% 476-2752-J-10
R44 476-2472-J-1 0
RES CHIP 4.7k0HM 1/lOW 5% 476-2752-J-10
R45 476-2472-J-1 0 RES CHIP 4.7kOHM l/10W 5% 476-2752-J-10
R81
476-2682-J-1 0
RES CHIP 6.8k0HM 1/lOW 5% 476-2472-J-10
- 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 HM651632DFP-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 7.5kOHM 1/IOW 5%
RES CHIP 7.5kOHM 1/IOW 5%
RES CHIP
7.5k0HM 1!10W 5%
RES CHIP
7.5k0HM l/10W 5%
RES CHIP 4.7k0HM 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
No.1 No.2 No.3
X X
X X
X X
x : NOT MOUNTED
0: MOUNTED
0
X
0
No.4
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/LO.=i
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!
>.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
,- -
.:iol.l - RA6
-
lOOL.'HM " ~2!
11
'(( '((( '(( (
IVIVI' 1VIVIVIVIVIVIVI' IVJv
1"11. Iii
1
,,5111~~~~
I
CA.t=" A.~A.Y 33P,.16 I
""'
v
:::;::::: C2
33P
IC2
AO '!01
.4.1 !02
A.2 !03
A3 'I04
A4 !05
A.S !06
A6 !07
A7 toe
"e res
4.9 I01C
A.lO I011
A.ll '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
A.A.AA14AA.
0123456
T"TTT
~I!:EE
rH¥
0123
.,
19
¥.£.a.
onrn '" ~
CASO
voo
V01
IC4
... 24 '"
J
g"~'"'>F~r'~'ij"' MREQ IO~G
""
RD
~
.J.Sc
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~~
VOl.&
~
Sll1L-
,.---voe
I
§'"'ji·K~~~~-im ~
Z~ f"OC
~ FRI!:S
"~ ~~~K ;:: ::::: C9 ""
3 Al2?
SR3
~ * '-S~Al:l2L---~------~·~~DSR2
=~
...!1.1..
Zlia
ZB.Il.
~
ZRAH
Z0'7
zoe
ZO"
ZO•
ZO:!I
Z02
Z01
zoo
ZA1!5
ZA1.t
ZA13
~: ~~ ti~::::l~:t:~
Z410
Z49
Z46
ZA'7
ZA6
ZA"
ZAA
ZAll
ZA2
ZA1
S ZAO
....s
CAl!
~&'i
FC1004 (SGE.:
R12
2.2K
6
;::f;: C7
100P
R11
4.7K
r. 1
l_ -~
RA7
4.7~0H""t "' 8
IC5
AO
...
A2
A3
A4
""
..a
.. ,
..e
A9
A10
A11
A12
6-
-~
llvuo
VA11
VA.12
VA13
VA14
VA15
I/A.16
lt.U7
Ul.8.
wts._
caaz.
I"OWR
VAle
f'--'lll=i""2----o--------.J"IIJ"i:L..j~ Sl-:!1
~~~L.2L_ __ o------~·~Sl-2
-
60P CON
CN3
VA&
VAll
YA7
VA12
YA6
VA13
VAS
VA1A
VA4
V.415
VA3
VAlliS
VA2
VA:S.7
VA1
I
III!II~II!!!!!!!!!!!!!IIIIIVO?
voo
vee
vos
Y01
V09
vos
V02
Y010
Y04
V03
V011
7
lil-J,._
... ~es
SR1
VA9
VA.1C
VA18
VA.19
VA.20
VA.21
VA2&!
'J..Ai!3
:(.S__
=
HSYNC
~
~
~
.. ~
l£!;J..l!..
QIAJS,.
:::.AS2
V01~
V014
V013
=
uu...
~
Uili.
Uljfl
OI.L._
n.t.::..
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 53.693175MHz 53.203424MHz
I
Notes:
*I To be mounted when part No.315-5660-0I or 315-5708-01 is used for IC6.
* 2: To be mounted when part No.315-5708-0I is used for IC6.
*3 To be mounted when part No.315-5660-0I 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
,--------,
r---r...,
r- _.._·_~_- ___ 1
l VCC:1 I :
vr
vr
5
1
I ~
1 CE21 C41
11.20
I
. CE22T c: ....
~
10u 0. 0£2.u
10u 0 .01!2u I
30.40 I
I
I I
I
T
C45 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
t.CZ2u
"'
[_---------------------------------------------------~
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---.: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
0.01 11 F
0.01 11 F NOT
USED 0.01 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
1.2K 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
4.7K
!OK
4.7K
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. 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
SI0
8
SI0
7
SI0
6 RAS Row address strobe
CAS Column address strobe
SI0
5
~
w8 11o
8 DT/OE Data transfer/output enable
W7II07
w6 11o
6 WB/WE Write bar bit/Write enable
W/10
1
-Write mask/data
I/0
WaflOs
W4!104 1 1 w5 11o
5
Vee1 11
Vss2
WBfiiE
NC
NC sc Serial clock
CAS
SE Serial enable
NC
Ao
SI0
1
-SI0
8 Serial data 1/0
VecfVss Power supply (SV)/ Ground
A1
A2
A
4 1 Aa NC Not
connect~d
Vee2
-· -· ·--· ------------· ·------------ ---------------·----------·--·--···---------------------
--------------
• Bloc~ Diagram
Vss
Vee
zen a:
a:
::Eenw
w
::Jw~
~
COLUMN DECODER
~~
Wtfl01
...Ja:~
RITECONTRO
::J::IE
oo:::>
CD~
I
(.)~CD
SENSE AMP
~~
Wsf10
8
Ao
Q.
';
WRITE BAR BIT
~
A7
CONTROL
en
a:
RAS
en
w
a:
CAS
wa:
0
(!)0
a:w
0
~~
DT/OE
0~
(.)
256X256X8
0~
w
CELL ARRAY
:lEW
WBIWE
<C::J
0
::Ez
3:CD
3:
l=w
sc
0 0 MASK RESISTOR (!)
a: a:
(&bit) SE
-···-···--------------------- ------------------------------------------------------
--------------- -----------··--------·------ ·------------------------------
a:
---------··- -------- --------------------------
w SI01
:x:a:
~~
~:IE
en~
::J< I
wz al~
SI08
fE=>
g
wo
a:o
------------- ----------- --· ·-------------------------------------------------
- 19-
-20-

IC7 315- 0795- 80
IC MSM54C864-80JS
• Top View & Pin Layout
v cc t.; ~- ,')
UWR
LWR
Al4
UOE!TEST1
1 LOE!RFSH
CE
1/016
1/015
7 1/014
1/013
1/0
12
1/010
1/0g
1 v cc .:; ""•)
---._ ____ ____r-
• Block Diagram
LOE/
RFSH
UOE/
TEST1
LWR Gl!l----t-a
• Pin name
Pin Name I Function
Ao-AI4
I Address input
UWR/UWR Write enable
LOE/RFSH,UOE Output enable/refresh input
CE Chip enable input
1/0,-1/016 Data input/output
vee
Power supply
GND Ground
MEMORY
ARRAY
REFRESH
CONTROLLER
- 21-
1/0,
1/0
2
1/03
1/0,
1/0
5
1/06
1/0;
1/0
8
1/09
1/010
1/011
1/0,2
1/013
1/0,4
1/0,5
1/016

IIU
©1993 Sega Enterprises, Ltd Printed in Japan
(/)
31201