Sega GENESIS II Manuale utente

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SERVICE

MANUAL

GENESIS

II

/MEGA

DRIVE

II

(PAL-8/1/G, RGB)

NO.

001

ISSUED JUNE, 1993

CONTENTS

1. SPECIFICATIONS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3

2.

IDENTIFYING PARTS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 4

3.

DISASSEMBLY · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 6

4.

BLOCK DIAGRAM · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 7

5. SCHEMATIC

DIAGRAMS···································

8

6.

CIRCUIT BOARD

DIAGRAMS···

· · · · · · · · · · · · · · · · · · · · · · · · · · · 12

7.

PARTS

SPECIFICATIONS··································

16

8.

EXPLODED VIEW & PARTS LIST · · · · · · · · · · · · · · · · · · · · · · · · · · 28

8-1. EXPLODED

VIEW···································

28

8-2. MECHANICAL PARTS LIST · · · · · · · · · · · · · · · · · · · · · · · · · · 28

8-3. ELECTRICAL PARTS LIST · · · · · · · · · · · · · · · · · · · · · · · · · · ·

29

8-4. ACCESSORIES/PACKAGE

LIST·······················

37

Sega Enterprises, Ltd.

Before Using This SeNice Manual

This service manual includes data for the GENESIS

II

and MEGA DRIVE

II

.

• Pans of

the

circuits are different

in

the

GENESIS

II

depending

on

the model of

IC

II

(RGI3

encoder used).

Check

the

model of ICII

on

the

main

circuit

board

and

identify the type,

F,

S or

SM.

Type

Model

of

IC11

Part

No.

F

IC

MB3514PF-G-BND-EF 313-5232-A

s

IC

CXAI

145M-T6 SOP 313-5213-A

SM

IC

KA2195D 313-5236-A

IC1

D

CN3

D

IC6

MAIN C.B (Top View)

• Differences

in

the circuits are shown

in

the difference tables

in

the schematic

and

circuit board diagrams.

•

In

the parts

list,

differences are shown

in

the REMARKS columns.

2

1. SPECIFICATIONS

RATINGS

MEGA

DRIVE

II

Model

GENESIS

II

I

PAL-l

PAL-8

PAL-G.

RGB

Power input AC 120V, 60Hz AC220V, 50Hz, AC 240V, 50Hz i AC 220V, 50Hz

I

Power consumption

18

w

18W

18

w I

ISW

I

Usable temperature Humidity 5-35

oC

, 20-80%RH (non-condensing)

Dimensions

220

(W)

X 212 (D) X

59

(H) mm

SPECIFICATIONS

CPU

68000 (8M) & Z80A (4M)

RAM

72k

bytes

Memories

I

VRAM

64k bytes

Audio FM,

PSG,

PCM

VDP

SEGA custom LSI

Display Regular color

TV

Display capability Colors 512

Video

outputs

VIDEO

RGB

Control terminals

2,

control

pad,

etc.

can

be

attached

Reset

button

Game

restart function

Slots For cartridge

and

extension

* Design

and

specifications

are

subject

to

change

without notice.

3

2.

IDENTIFYING PARTS

4

2-1. FRONT & TOP VIEW OF CONSOLE

CONSOLE

Power

Button

Directional

Button

(D-Button)

CONTROL

PAD

2-2. BACK VIEW OF CONSOLE

Reverse

Side

A/V

OUT)ack

Extension

Compartment

Cartridge

Slot

Reset

Button

Power-On Indicator

Control

Port

2

Control

Port

1

Start

Button

C

Button

B

Button

A

AC Adaptor

Jack

AN

OUT ADAPTOR

2-3. ACCESSORIES

GENESIS

IT

RFUnit

SEGA AFUNIT

J.«X>B.

NO M<>1632

NT

.SC-M

f'IA)

CH3-CH4

~VN

Cii~Elec;T

'I

MEGA DRIVE

IT

RF

Unit

SEGA

RF

UNIT

(Except French model)

AC

Adaptor

Except

U.K.

)

Austraria

and

New Zealand

AC

Adaptor

Peritel Cable Sega 16-bit

Game

Canridge

(French

model

only) (Provided or

Sold

separately)

(U.K.) (Australia

and

New

Zealand)

5

3.

DISASSEMBLY

6

3-1. Dismantling procedure

Removal of bottom screws and top case

I) Turn

the

power button off.

2)

Turn the unit over. (See

Fig.

I)

3) Remove four screws (202).

4) Remove top case

(I

).

Main board removal (See Fig. 2)

I) Remove nine screws (20I).

2)

Remove the shield plate.

3)

Remove two screws (203).

4)

Remove the

main

board from the bottom case

(2).

3-2. Reinstalling procedure

Main board reinstallation

I) Attach the 64-pin cover (8).

2)

Attach the main board

to

the bottom case.

3) Tighten

two

screws (203).

4) Attach the shield plate.

.5)

Tighten nine screws (201).

Top case reinstallation

1)

Turn off the tactile power switch (TACT SW)

on

the main board.

2)

Attach the top case.

3)

Engage the top case with the bottom case.

Tightening the screws on the bottom

case.

I) Turn the unit over. (See Fig. I)

2)

Tighten four screws (202).

201

1\

J

?-202

Fig. 1

f-"201

Fig.

2

4.

BLOCK DIAGRAM

PERIPHERAL

DEVICE

(~g~=~~~:

~)

ANTENNA

GAME

CARTRIDGE

"'17'

r--

1

I

------------------------- --------------------

------------------------------------------------------------------~

I

L-

IC7.

ICB

~P041264

V-RAM

64KB

OSCl

n

53.

203424M

!MEGA

DRIVEn>

IC6

ICll

53.

o93!75

(GENESIS

II>

ZCLK:

3.

5MHz

-

VCLK:

7.

oMHZ

FC!004

M83514

VIDEO/

E[lCK

MCLK

AUDIO

CN3

C64P>

VCLK

CN2

C60P>

osc

EDCK

RGB/

SYNC

"

r--

-

ZCLK

42

~

IT

< r

;1;1

1

VCLK

~

ICl

<

~

~r

I

e:i~

131

68000CC

II I

II~

RGB

ENCODER

VDP

-"

I

ADDRESS/CONTROL

BUS

llo

bit>

-v

or---

-,/

CNl

I

~;,

·~

II

~;,

<

~

c;

~

" ::>

1--

<

r--

'

rv-

DATA

BUS

(!b bit> 1

PSG

RGB/SYNC

v

CPU

68000

<(;:,.

II

,(;..

! v JI

1--

......

~

""

.!..---

"'

~

~~

~

t--

<

:>

r&

IC6

' 7

~

7

~

MIX

ao

FC!004

0

IC6

~

7

:>

FC!004

"

MCLK

L

~

EDCK

ZCLK

7 v R

~

BUS

VCLK

I

RAM

l

ARBITER

V1:

A

I/0

EDCK:

MIX

64KB

~1/0.

ZTOV.

VTOZ

13.

3MHZ

~

IC2.

IC3

.),.

"'

0

•

PD42832-15

N

IC4

ZBOQFP

"'

I

;z

,("-

,;

ZCLK

d

,..,.1

....

~

IC6

<

N

b~b

IC12

,~~

<

FCI004

'7

N

FM

SOUND

SOURCE

TA7805HF

/I. "

.

ADDRESS/CONTROL

BUS

CB

bi

tl

+

DC

SV

2

REGULATOR

'

N

),

cPu

zao

l'r

~;,

v

/1

A.

0/A

CONVERTER

IC

DATA

BUS

C8

bit>

~

n -v

ICS

~>

~

./

~

•PD4304CX-15

~7

I

RAM

l

8KB

ONS

I

CN6

-------------------------------------------

----------------------------~------------------------------------------

!CONTROL

PADI

CONTROL

PAD

1

PLAYER

2

PLAYER

OPTION

1 2 3 4 5 6

~

RF

UNIT

i

VIDEO/AUDIO

AUDIO

I

;

RGB

DC

9V

OR

IOV

850mA

I

AC

ADAPTOR

-

7

E

~

TV

~

......

""

-

~

0

' c

AC~

8

A

8

7

8

5.

SCHEMATIC DIAGRAMS

5-1. SCHEMATIC DIAGRAM-1

E

0

c

8

A

IC7

AO

I/01

11

lDO

At

I/02

A2

I/03

A3

I/04

A4

8

SDO

AS

SI/01

AS

SI/02

A7

SI/03

SI/04

sc_

BAa.

~iiE

tiL.

SOE

ZJ:P

ICB

AO

I/0~

AD4

At

I/02

A2

I/03

A3

I/04

A4

~

AS

SI/01

AS

SI/02

A7

SI/03

sc

SI/04

sc_

BAa.

!all

QLIOE

RiB:

NOT

USED

sc

R.O.fH

CAS1

o..:1

vc~;a

F87

_T

tiL.

SOE

ZLP

lp;;p

NOT

USEI

1\

1t"

1

.~o

..

1\

1f;~P

I\

1t"'!~o"

1\

d7

HS601

VCLI<

'"

IC~

rvii:A

IPLO

27.

IPLO

IPL1

IPL2

BGAK

12

R74F~~O

30

_.G..

BG

..

~

BGACK

BR

OTACK

SERA

FCO

FC1

FC2

SG

VMA

E

HALT

RESET

AS

UDS

LD:t

R/W

seooocc

::f:::

C1

220P

NOT

USED

1

'H

!i

....-·A3

~~

-

A6

·;A7

H~

:,:~~

..~

..

12

VA13

-u

..

-1'15

II'

us

./.6.17

-'At8

~i~

-'A21

;A22

.6.23

•.

00

01

02

03

04

OS

06

07

08

09

L

oto

011

t.

012

013

014

.::_ot5

li

2

cs2

~pooP~

/1

~

IRtS

2.2K

.,.

'Lr!~;-~

I I

I

:.

I

_·..:::r

RAB

2.2KO'!~

c~~,~01

~

/I

l

I CAP

ARAV

33Ptt16

IC2

AO

At

A2

A3

A4

AS

A6

A7

AS

A10

AU

A12

A13

A14

,,..,n

:>o

~

liE.

WE

I

NOT

USED

rh

3

I

CAi

DO

D1

02

03

D4

DS

D6

D7

:::j'

C2

33P

rh

r--1-

ce

I

;.;..;

NOT

U!SEO

Jis

n~t~!

YNNL

SCCK

FS13

~

IC"'

1

AO

DO

At

01

A2

02

A3

03

A4

04

AS

05

AS

06

A7

07

AS

A10

AU

A12

A13

At4

RASO

20

~

liE.

WE

4

ovr•

•

a.

rn

,.,

.,,.

rn

"'

~

WAIT

21

HALT

WAIT

l.::::eEINi:T=1ttl2

INT

NMI

ZRES

23

RESET

ZBR

22

SUSRQ

8USAK

ZCLK

1

N.C.

!

I~

ti7

.L,z..,..eo;;;"""""P----1

5

FC1004

(SGE]

R12

2.2K

6

R10

2.2K

R11

v~ftft+ftnl

vn

rn

·~•

v•

r·

....,

~

""'

.----

.;~~

::

F=:

VC!;:1

r.7

::

*

F=:

~~

..

rh

;;

f;:

C6

33P

r.7

::f::

~~OF

r,l-]

4.7K

vc;~t

r:

I

'"

~

....

,.

......

'"

,,

..

7

l£6JJi.

CASO

voo

V01

V02

V03

V04

vos

VO&

V07

voe

VOS

V010

V011

VD12

V013

VDt4

laWS

BQtl_

dEL.

a.s2

FDC

FRES

.UL

SR3

6211

SR2

DisK

VAl

VA2

VA3

VA4

VAS

VA7

VAS

VA8

VA10

VA11

VA12

VA13

VA14

VA15

VA18

l£A.l7

WIS.

WIS-

C6D.

FDWR

VA!.S

627

SL3

S2S

SL2

~

VAS

VAU

VA7

VA12

VA&

VA13

VAS

VA14

VA4

VAtS

VA3 ·

VA16

VA2

VAt7

VAt

V07

VDO

VDB

VD6

VDt

VOS

VDS

VD2

VDtO

VD4

VD3

VD1t

SL.J._

MRES

SRt

VAS

VA

tO

VA18

VA19

VA20

VA21

VA22

~3

:a__

~

HSVNC

~

CAaP

~

AS

~

DIAlS.

CAS2

V015

VDt4

VOt3

:ilU.2.

~

WIS.

W!FI

tQ_

I.ll£.

CART

S

..

P

t;;ON

8

*DIFFERENCE TABLE FOR DIAGRAM-1

CIRCUIT GRID GENESIS

TI

MEGA DRIVE

TI

No.

OSCI C-5 53.693175MHz 53.203424MHz

C9 E-7 NOT USED 47P

CIO C-5 NOT USED lOP

Cll

B-4 NOT USED 33P E

5-2. SCHEMATIC DIAGRAM-2

I-

- - -

:[£.i_

-l

IC2 IC3

1--

~I'J_;3_-

-1

I - - -

_C~2-

- - - l

:~;

:~:

I ·lvccs vccs I +SlY vccs

ikk

I

TP

I

VCC1 VCC1

I I I I I

:~~

'pi

I C311 I I

I

o.oaau

1

'F'

TP

lo

I I I I :f

""

I

!F

o.o~

1..:..

__

__1

l

___

__l

Cl!:27 •

1%28

c

••

47u

0.0112U

IC5

OSC1

TP

:~:

----I

:~1

I

TP

I I I I I

'p''p'

I I

~---

----

~

I

o.oaau

1

o.ou..1

L

______

_j

I

I I I I L

_________

_!

l

___

__l

I I

I_---

c

- - - - -

..1

~6-

- - - - l

:•t-=

~I

r

46

C47

0

.022u

A73

SK

IC4

r - -vc-;s - - 1

I I

I

sou

0

.ORI!u

I

J I

,I I

l

_____

_j

IC7

I-

-v~s--

I

I I

,

_____

_j

r -

l.C_l3_-,

:

vr

I

~pel

I

Rllu

I

I I

l

_____

_j

I

'--------

------------,

B

I~

~

I I-""

f

411

~

F2

T10u

•••

-

;:

,_,_

J

A

---------------------------------

1 2 3 4 9

5-3. SCHEMATIC DIAGRAM-3

E

I

l_C_11_

I

vvcc

I

~L:

b::

100u

I

CN1

:

-;~cc:-

- - - ;

I

EH3

I

I I

I

r·;;u2e

I

,..

J

I I

L

_____

l

CN5

~-------------------,

:

vr

f

vcf

-

--

- - -

-:

:

~

I

~

I

I I

II

I * I

e~ll

:J 0 I

rh

GENESIS D : :

L - - - - - - - - -

_I:-

~-

.=

=

=.

---.:

=

~-

_::

,

CN6

..

I

I I

l

___

_j

~---------,

I VCC1

:~:

*

D

*DIFFERENCE TABLE FOR DIAGRAM-4

CIRCUIT GENESIS

ll

No. GRID MEGA DRIVE

ll

TYPE-F TYPE-S TYPE-SM

IC11

E-6

MB3514PF-G-BND-EF CXA1145-T6 SOP

KA2195D

MB3514PF-G-BND-EF

c

L2

E-7

100

.u

100

.u

NOT

USED

IOO.u

L3

D-7

12

.u

12

.u

NOT

USED

12

.u

L6

D-7

NOT

USED

NOT

USED

NOT

USED

100

.u

CE14

D-6

220

.u

IO.u IO.u

220

.u

C28

E-7

l8P (CH)

18P

(CH)

NOT

USED

l8P

(CH)

C29

D-7

0.01

.u

0.01

.u

NOT

USED

0.01

.u

C30

D-7

I80P (CH) I80P

(CH)

NOT

USED

I80P

(CH)

C32

E-6

ISP (CH)

180P

(CH)

NOT

USED

15P

(CH)

C57

D-5

-

lOOP

(CH)

NOT

USED

NOT

USED

lOOP

(CH)

B

C61

D-6

NOT

USED

NOT

USED

NOT

USED

0.1

.u

C62

D-7

NOT

USED

NOT

USED

NOT

USED

12P

(CH)

R47

E-6

12K

1.2K

NOT

USED

12K

R54

D-6

,_.

NOT

USED

24K 24K

NOT

USED

R55

D-6

!OK

lK

NOT

USED

!OK

R56

D-7

1.2K

NOT

USED

l.2K

R57

D-7

330 330

NOT

USED

IK

R61

E-5

4.7K

!OK

IOK

4.7K

A

2 3

10

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