Sega 32X Bedienungsanleitung

iiM' SERVICE MANUAL

GENESIS 32X(VA0,VA1) /MEGA DRIVE 32X

NO. 012

ISSUED JUNE. 1995

CONTENTS

1. SPECIFICATIONS 2

2. IDENTIFYING PARTS 3

3. ACCESSORIES 3

4. DISASSEMBLY 4

5. ADJUSTMENT 5

6. BLOCK DIAGRAM 7

7. SCHEMATIC &CIRCUIT BOARD DIAGRAMS 9

8. PARTS SPECIFICATIONS 19

9. EXPLODED VIEW &PARTS LIST 34

9-1. Exploded View 34

9-2. Mechanical Parts List 35

9-3. Electrical Parts List 35

9-4. Accessories/Package List 38

Sega Enterprises, Ltd.

BEFORE REFERRING TO THE SERVICE MANUAL

Since the circuit of the Extension Unit used in the GENESIS 32X has been integrated on the main circuit board, an Extension

Unit is not necessary for the GENESIS 32X(VA1).

This circuit is built into the MEGA DRIVE 32X from the first unit.

1. SPECIFICATIONS

Ratings

Model GENESIS 32X MEGA DRIVE 32X

PAL PAL G/l

Power input Input: AC120V, 60 Hz

Output: DCIOV, 850 mA Input: AC230 V, 50 Hz

Output: DCIO V, 850 mA Input: AC240 V, 50 Hz

Output: DC9 V, 850 mA

Power consumption Approx. 4WApprox. 4WApprox. 4W

Operating environment Temperature: S'C~35‘C

Humidity: 20%RH-80%RH (no condensation)

Dimensions 115(W)X210(L)X 100(H) mm

Specifications

CPU

Master 32bit RISC SH2 23 MHz 20MIPS

Stave 32bit RISC SH2 23 MHz 20MIPS

Memories

RAM 2Mbit (SDRAM)

VRAM 2Mbit

Sound PWM Sound Source (Stereo)

VDP SEGA custom LSI

Display TV

Display capability Color 32,768 colors

VIDEO

Video Output RF

RGB

Slots Cartridge slots

2. IDENTIFYING PARTS

Front View Rear View

3. ACCESSORIES

Connector Cable y

Conversion Cable Audlo/Video Cable (Mono)

Spacer for GENESIS II

/MEGA DRIVE II

AC Adaptor Bectromagnetic Shield Plates

Qf]=CUO

Mono Cable Scart

(France only)

Extension Unit

(Only GENESIS 32XVA0)

^=[Z)=oQEi

RF Unit

(PAL version except for France)

-3-

4. DISASSEMBLY

4-1. Top Case Removal (See Fig. 4-1)

)

Remove four screws ®and the top case.

4-2. Sub Board Removal

(See Fig. 4-2)

1)Remove ten screws ®attached the top shield case.

2) Remove two screws ©attached the 64-pin

connector.

3) Remove two 40-pin flat cables on the sub board.

4) Remove the sub board showned as arrow.

4-3. Main Board Removal

(See Fig. 4-3, 4-4)

1) Remove four screws ®attached the front case and

rear case on the bottom case and then their

showned as arrow.

2) Remove two screws ®attached the front case and

rear case and main board.

Flg.4>2

-4-

5. ADJUSTMENT

Video Frequency Matching Adjustment

Test equipment and tools for adjustment

1.Regulated power supply (5VDC)

2. Frequency counter (capable of displaying 7digits or more)

3. 10:1 oscilloscope probe

4. Philips screwdriver

5. Non-metal adjustment driver

6. AC adaptor excusively for super 32X

7. One lead for GND and two leads forSV

Connections of test equipment

Adjustment procedure

1.Disconnect the super 32X from the Mega Drive.

2. Remove the top case and top shield case from the super 32X.

3. Plug the AC adaptor into an AC outlet and into the DC jack.

4- Set the regulated power supply to 5V DC and connect itto IC14 pin 1. (The super 32X turns on.)

5. Connect 5V DC to ICl 2pin 31 .(Set to the test mode.)

6. Connect the frequency counter to ICI2 pin 20 and adjust C72 so the frequency is 3.579545 MHz ±lOHr.

-5-

6. BLOCK DIAGRAM

7. SCHEMATIC &CIRCUIT BOARD DIAGRAMS

7-1. Schematic Diagram-1 (Main Section -1/2)

MEMO

7-2. Circuit Board Diagram (Main Board) VAO

ABD

7-3. Schematic Diagram-2 (Main Section -2/2)

S1EIF1GIH

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