Sega Game Gear VA1 Bedienungsanleitung

ll(lliA"

SERVICE

MANUAL

GAME GEAR

VA1

NO.

004

ISSUED

DECEMBER,

1993

CONTENTS

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

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

DISASSEMBLY · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 5

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

SCHEMATIC DIAGRAMS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 9

CIRCUIT BOARD DIAGRAMS · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

PARTS

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

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

8-1. Exploded View· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

8-2. Mechanical Parts List · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

8-3. Electrical Parts List · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 26

8-4. Accessories/Package List · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

Sega Enterprises, Ltd.

BEFORE USING THIS SERVICE

MANUAL

This

service manual

covers

the

one-chip

custom

LSI (CPU+VDP+SCA).

The

First Serial No.

Chip

Version Unit.

• AC 120V area • AC 230V/240V area

•

0201

76537-(For

USA) • 020019501-

• 020168498-(For CANADA) • B30000001-

• B20135204- • K37000001-

•

K201

17921- • P31020001-

• P31000001-

• COMPARISON WITH ANOTHER MODEL

Electrical

Components

COMPONENT

GAME

GEAR

VAO

CPU IC Z80A

VIDEO PROCESSOR IC IC CUSTOM CHIP VDP

1/0, LCD CONTROL

IC CUSTOM CHIP SCA

MEMORY FOR CPU'S PROGRAM IC UPD4364G-15L

MEMORY FOR VIDEO PROCESSOR

IC HM65256BLFP-12

OPAMP

IC UPC358G2

DUAL SWITCHING REGULATOR ICMB3775

DUAL LOW-VOLTAGE POWER AMP ICTDA2822M

·.,.

-2-

GAME

GEAR

VA1

IC CUSTOM CHIP

Same as on left

SPECIFICATIONS

Ratings

Internal

Adaptor

Power

input

External BaneryPack

Car Adaptor

Power

consumption

Operating environment

Dimensions

Specifications

CPU

RAM

Memories V-RAM

Audio

VDP

Scrolling Screens

Sprite Screens

Display capability Character Panerns

Scrolling Directions

Display

Screen Dimensions

Screen Composition

Headphone terminal

Extension terminal

Slots

(LR6,

HP7)Baneries

(Longer

life

alkaline baneries

are

recommended.)

Input:

ACI20V 60Hz

Output:

DC9V

850mA

Input:

AC230V

/240V 50Hz

Output:

850mA

Input:

DC9V

Output:

DC7

.2V

l200mA/h

Uses power

from

car banery.

Input:

DCI0.57V-l6V

Output:

DC9V

800mA

9V-

3W(ACI20Varea),

IOV-

3W(AC220V/240V area)

Temperature:

O"C

-40"C,

Humidity: l0%RH-80%RH

(no

condensation)

2IO(W)

X ll3(D) X 39(H)

ZSOA

(3.58MHz)

64kbit

l28kbit

3 types of sound + 1

noise.

SEGA

custom

LSI

(l chip=

CPU+VDP+SCA)

160

146

dot

matrix

32 on-screen colors displayed

from

a palette of

4096

colors.

sprites on-screen

with

dimensions of8 x 8

dot

x I6 dot

displayed

from

a palene of 4096

colors.

Maximum

of448 defined types

possible.

Horizontal, vertical, diagonal.

3.2" Color

LCD

with

Back-Light.

65.27

wide x 48.90mm

high

160

dot

wide x I

dot

high

Plug

any

set of

normal

headphones for private

play.

play

multi-player games

using

than

one

Game

Gear

system.

For cartridge orTV Tuner Adaptor

*Design

and

specifications

are

subject

change without

notice.

-3-

IDENTIFYING PARTS

2-1. Front & Top Views of Console

Power Light

(POWER)

Directional

Button'---+-

(PAD GG)

......

....

Speaker

Color LCD

Display

Power Switch (POWER)

Button 1 & 2

Volume Control

(VOLUME)

Brightness Control

(BRIGHT)

Gear-to-Gear Cable Input {EXT)

2-2. Bottom View

Console

•

Battery Compartment Cover

(BATT LID

LEFT

GG)

Cartridge Slot (CARTRIDGE)

r l

• •

Accessory Screwhole

Note:

Names

paJtS

brackets

( )

are

used

the

paJtS

list.

2-3. Accessories

Strap Game Cartridge

{Provided or sold separately)

-4-

•

Battery Compartment Cover

(BATT LID RIGHT GG)

AC Adaptor

{Kuwait)

3. DISASSEMBLY

3-1. Dismantling Procedure

Removal of bottom screws and bottom case

(See Fig.1

Turn the power button off.

Tum

overthe unit.

3) Remove both battery companment lids (8 & 9).

4) Remove screw (204).

5) Remove six screws (20I).

Fig-1

6) Remove the bottom case (See Fig.2).

Lift bottom case

the direction

arrow (A)

and make the open condition.

Remove the connector

DC-DC convener

board fixed

the bottom case.

Disconnect two connectors

sound board.

Fig-2

-5-

Main board removal (See Fig.3).

Remove two screws (202).

2) Remove six screws (203).

3) Remove the main board from the top case.

Fig-3

Sound board and DC-DC converter board

removal (See Fig.4).

Remove four screws (203).

2) Remove the suppon plate from the bottom case.

3) Remove two screws (203).

4) Remove the sound board from the bottom case.

5) Remove the battery blade cover.

6) Remove two screws (203).

7) Remove the DC-DC convener board.

203

Fig-4

3-2. Reinstalling procedure

Sound board and DC-DC converter board reinstallation.

Attach the power knob to the DC-DC converter board.

2) Anach the DC-DC converter board to the bottom case.

3) Tighten two screws (203).

4) Anach the battery blade cover.

5) Attach the sound board.

6) Tighten two screws (203).

7) Anach the support plate.

8) Tighten four screws (203).

Main board reinstallation.

1) Spray surface

inside clear plate with static proof liquid.

2) Carefully check and remove dust inside clear plate and top case using airgun

a clean place.

Attach each button and rubber contact

its normal position.

3) Attach the LCD cushion along to the bosses

the top case.

4) Lead the speaker cable outside the bosses

the top case.

5) Attach the main board.

Case I After exchange

LCD.

Take off protective film

LCD.

Case 2 Others

Clean surface

LCD using an airgun.

6) Anach the main board inside and along to the bosses

top case.

Note: When setting the main board, it

important to anach

as quickly as possible to prevent the adhesion

dust on the surface

the LCD and clear plate.

7) Tighten six screws (203).

8) Tighten two screws (202).

Bottom case reinstallation.

Correct 2 connectors from the main board

the sound board and I connector from the main board

the DC-DC

converter board.

Firmly set the bottom case to the top case taking care not to pinch the cables by the edge

the cases.

· Tightening the screws on the bottom case.

Turn

over

the unit.

Tighten six screws (20I).

3) Tighten the screw (204).

4) Attach both battery lids (8 & 9).

-6-

BLOCK DIAGRAM

MAIN

BOARD

CHIP=CPU+VOP+SCA

ICl

CUSTOM

CHIP

IC3

JLP04364G-1

MAIN

RAM

64KBIT

STATIC

RAM

r-------------------- -

Z80A

CENTRAL

PROCESSING

UNIT

ADDRESS

BUS

DATA

BUS

~~~:============-=~==j

VIDEO.

I==========::='J

DISPLAY

CONTROL

BUS

~;=========~-=~

PROCESSOR

I================:J

CCLK

5795MHz

IC2

HM65256BLFP-12

VRAM

256KBIT

PSUEOO

STATIC

RAM

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

,.---------.

AC2

00V

.----------..

BACK

LIGHT

30KHz

DC-AC

FOR

CONVERTER

(INVERTER

RCUI

+5V

DC-DC

CONVERTER

BOARD

CONTROL

MAIN

CLOCK

CONN

+SV

+5V

DC-DC

EXTERNAL

•

ADAPTOR

BUS

VCLK

10.

738MHz

SOUND

ANALOG

DATA

BUS

32.

215905

MHZ

~m~

CONTROL

PAD

y 0

INTERNAL

BATTERIES

CONVERTER

BATTERY

PACK

45P

CARTRIDGE

SLOT

CCLK

VCLK

CLOCK

ADDRESS

BUS

DATA

BUS

CONTROL

BUS

STANDARD

CELL

ARRAY

LCD

DRIVER

CONTROL

BUS

l=========:j

~~...,...-.,..,.,.-J

SOUND

ANALOG

DATA

+5V.

+34V

45P

CARTRIDGE

1------'

SLOT

0~20V

POWER

SUPPLY

+5V.

+34V

CIRCUIT

~"-------'

LCD

DRIVER

+5V

SOUND

BOARD

GENERATER

I 0

SOUND

~~~~~~~~~~~~~~~~~~~

JOY

BUS

CONTROL

PAD

I/0

DATA

BUS

]

l.:================:j

t5NNEC

~---------------------------------------------------------------------------------------------------------J

1 2 3 4 5 6

-7-

-8-

CAR

ADAPTOR

SPEAKER

OHM

(MONAURAU

5-2. Main Circuit Board-2

1ce.

.,.,......,

...

101<

FWII

101<

CIU

HilT

ANTI

caz

RC11

71<

ill

ANTI

1'132

1001<

=j=~u

201< 1

11-

CL2.

[1.~

OW.

CLA

(\.

3].

CLB l .

' '

FW1

1!!.21<

. '

1..2

1Ciei..H

010

.------'V..,._

_____

t--""~

I!IIA81Z

_vi

011

r-----~v-----------t--~r~~1az3

6 7 8

12-

5-3. DC-DC Converter Circuit Board

-I

----

r----

I r..v_

rzo:-<>---'

(_-

CONN

,J~Ct<

SW1

. 0 1

---

SBU

ITANTl

1 1 1

6 e 4

v s +

c I

E p N

F 2

T T 1

1 2 3

6BOPJ

FIB

471<

·n

"'~

.1U

NOT

USEO

-For

l20V

area - - - -

- - - - - - - -

.JG

FB~04V~4eO~B-00*2

-For AC230V/

AC240V

area -

--------,

tl~--~111

'---Ill

f---c>-

- -

..JG

FB~04VA450~B-00*2

. I

1--h

---

-- -

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

r--~

II!'

I 1

rl~1U

1.2mH

HAF22

11<

Fl1

3.91<

Ill:

Fl7 <

331< "

FIS

1101<

(111:)

2.21<

L C4

1U. I<

~2SAB12

~ A2

2SC1623

22U/35V

271< <Fl6

11<

FIB

)

31<

(1"~

1 1 1 a

3 2 1 9

rhn

i F 0 0 v CN1

T u c 9

N c T c

+34V

2 2 2

IC1

MB3775PF

1C11

VBAT

F u G e VFIEF

N B c T N

1 1 1 1 D

r--

C10

1 5

Fl13

0.1Ul

l100U/25V

GND

5 6 7 e

220

GNO

Iii:

GNO

6BUH

A12

+5V

1U,

360

(1/4Wl

25B1301(ZO

ZPl

j;20U/6.3V

C12 C13

+5V

::;i

0.1UJ

l CONN

AlO

!!..

HRF22

Rl4

331<

>All

< 201<

(111:)

121<

R15

6.Bt<(l"l

2 3 4

5-4. Sound Circuit Board

l C4

100U~-

0.1U

R=:l

~1-

100

r·u

Fl3

4.7

r·u

4.7

CONN

0 R

5 6 7 8

14-

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