Commodore C64 Service Manual

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Page 1

SERVICE MANUAL

MODEL C64 COMPUTER

SEPTEMBER 1985 PN-314001-02

Commodore Business Machines, Inc.

1200 Wilson Drive, West Chester, Pennsylvania 19380

U.S.A

Commodore makes no expressed or implied warranties with regard to the information contained herein. The information is made available solely on as is basis, and the entire risk as to quality and accuracy is within the user. Commodore shall not be liable for any consequential or incidental damages in connection with the use of the information contained herein. The listing of any available replacement part herein does not constitute in any case a recommendation, warranty or guaranty as to quality or suitability of such replacement part. Reproduction or use without expressed permission, of editorial or pictorial content, in any matter is prohibited.

This manual contains copyrighted and proprietary information. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of Commodore Electronics Limited.

Converted to PDF: peter.sieg1@gmx.de in Jan.2007

Page 2

• SPECIFICATIONS

• PRODUCT PARTS LIST

• BLOCK DIAGRAM

• CIRCUIT THEORY

o POWER SUPPLY

o RESET LOGIC

o CLOCK CIRCUITS

o I/O, RAM, EXPANSION LOGIC

o RAM CONTROL LOGIC

o 5 PIN VIDEO AND AUDIO OUTPUTS

o 8 PIN VIDEO AND AUDIO OUTPUTS

o CASSETTE INTERFACE

CONTENTS

o KEYBOARD, JOYSTICK & PADDLE INTERFACES

o SERIAL INTERFACE, USER PORT

• TROUBLESHOOTING GUIDE

• BOARD IDENTIFICATION

• PCB ASSEMBLY #326298-01

o BOARD LAYOUT

o PARTS LISTS

o SCHEMATIC #326106

• PCB ASSEMBLY #260407-04

o BOARD LAYOUT

o PARTS LIST

o MODULATOR SCHEMATIC #251025

o SCHEMATIC #251138

• PCB ASSEMBLY #250425-01

o BOARD LAYOUT

o PARTS LIST

o MODULATOR SCHEMATIC #251696

o SCHEMATIC #251469

o PIN ASSIGNMENTS

Page 3

C64 COMPUTER

GENERAL DESCRIPTION

MEMORY

ROM

MICROPROCESSOR

DISPLAY

COLORS

CHARACTERS

DISPLAY MODES

RESOLUTION

SPRITES

The "All Purpose" Commodore 64 us the complete computer for education, home or small business applications. Supported by quality peripherals and a full range of software, the Commodore 64 is perfect for the family. No other computer can offer such variety of uses and applications at such an affordable price.

64K RAM

20K ROM Standard (includes operating system and BASIC interpreter)

6510A Microprocessor - 1.02 MHz clock Compatible with the 6502

40 Columns X 25 lines of text

16 Background, border and character colors

Upper & lower case letters, numerals and symbols Reverse characters All PET graphic characters

Text characters High resolution graphics

320 X 200 Pixels

8 independent sprites Each consists of 24 X 21 pixels and up to 4 colors Each independently expandable horizontally and vertically Collision detection for sprite to sprite and data to sprite collisions

SOUND

KEYBOARD

KEYS

INPUTS/OUTPUTS

FEATURES

PERIPHERALS

6581 Sound Interface Device includes 3 independent tone generators - each with 9 octaves Each voice includes programmable ADSR generator (Attack, Decay, Sustain, Release) and control of sawtooth, triangle, square, variable pulse and noise waveforms Full filtering capabilities with low, high and band pass filters External sound input

Full size typewriter style design

66 Keys total 2 Cursor control keys 4 Function keys (up to 8 user defined/programmable functions possible) Upper and lower case character set Graphic character set

User port Serial port ROM cartridge port 2 Joystick/paddle ports Video port C1530 Cassette drive interface port

Built-in BASIC 2.0 - over 70 commands, statements and functions Full screen editor

C1541 Disk drive C1530 Datasette MPS 801 Dot matrix printer

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MPS 802 Dot matrix printer MPS 803 Dot matrix printer DPS 1101 Daisey wheel printer C1520 Plotter/Printer C1702 Color monitor CM141 Color monitor

POWER REQUIREMENTS

120 Volts, 60 Hz

Specifications subject to change without notice.

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PARTS LIST

C-64

PLEASE NOTE: Commodore part numbers are printed for reference only and do not indicate the availability of parts from Commodore. Industry standard parts (Resistors, Capacitors, Connectors) should be secured locally. Approved cross-references for TTL-chips, Transistors, etc. will be available in manual form through the Service Department in November of 1984. Unique or non-standard part will be stocked by Commodore and are indicated on the parts list by a "C".

TOP CASE ASSY

Top Case

Keyboard

LED Plate

Nameplate

Lamp Hold Set

LED Assembly

BOTTOM CASE ASSY

Bottom Case

Foot, Self-Adhesive

PCB Shield Plate

PCB Insulation Sheet

ACCESSORIES

Users Manual

Power Supply

RF Cable

Switch Box

C 326113-01

C 326166-02

C 326160-01

C 326161-01

C 903820-03

C 1001039-01

C 320974

C 251053-02

C 326189-01

C 904778-01

C 326114-01

C 950157-04

C 326131-01

C 326288-01

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Page 7

C64 CIRCUIT THEORY

There are three versions of the C64. The C64 with five pin connector video output (326106). The C64 with an eight pin connector video output (251138), and the C64B which has improved system clock circuit design (251469). Most circuit theory explanations will be the same for all three versions. Refer to schematic 326106 unless noted otherwise.

The Power Supply

The external power supply generates a regulated 5VDC and 9VAC. 5VDC is applied to pins 5 and 1 of CN7 on the C64 pcb. Filtered by L5, C97, and C100 it is then controlled by on/off switch S1. This 5VDC output supplies the microprocessor logic.

9VAC is applied to pins 6 and 7 of CN7 on the C64 pcb. +12VDC, +5VDC CAN and 9VAC unregulated are outputs that are derived from this 9VAC supply. The 9VAC supply is made available on pins 10 and 11 of the USER PORT CN2.

12VDC Generation

9VAC is added to 9VDC through CR6, and rectified by CR5. The unregulated DC output is filtered by C88 and C89 then regulated at 12VDC by VR1. The regulated output is filtered by C57 and C59. The 12VDC supplies the VIC and SID IC, and the audio amplifiers.

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+5VDC CAN Generation

9VAC is rectified by CR4. The unregulated DC output is filtered by C19, and C95 then regulated at 5VDC by VR2. The regulated output is filtered by C102 and C103. The output called 5VDC CAN is separated and individually filtered into two outputs called Vvid and Vc. Vvid is the 5VDC supply for video circuits, and Vc is the 5VDC supply for the clock circuits.

9VDC Unregulated Generation

CR4 rectifies the 9VAC input. The output is 9VDC unregulated. This supply powers the cassette motor transistor amplifier circuits, and the RF modulator on the C64B version.

Page 9

C64 CIRCUIT THEORY

Reset Logic Circuits

U20 is a 556 timer configured as a one shot multivibrator. The output pulse width is determined by the size of R34 and C24. Pulse width = 1.1 x R34 x C24 = .5 seconds. The output on pin 9 is "high" active. The output of U8 is "low" active. Reset initializes all the processor logic and causes the processor to load the program counter register with the address of the first instruction of the operating system program called the KERNAL. The starting address is stored in locations $FFFC and $FFFD. The first instruction is decode and executed giving KERNAL control of the computer operations. The reset pulse occurs when turning the power on to the computer.

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C64 CIRCUIT THEORY

The C64 Clock Circuits.

Crystal Y1 develops a 14.31818MHz fundamental frequency clock signal. U31 is a Dual Voltage Controlled Oscillator. The output on pin 10 is a 14.31818 MHz clock signal called the color clock. R27 can be adjusted to obtain exact output frequency. U30 is a frequency divider that outputs a 2MHz signal on pin 6. U29 is a D flip flop which outputs a 1MHz signal on pin 9. U32 is a Phase/Frequency Detector which compares the output of the U29 to the phase 0 clock, and outputs a dc voltage on pin 8 that is proportional to the phase difference between the inputs. The second half of the Dual Voltage Controller Oscillator U31 generates an 8.1818MHz clock signal called the DOT Clock. The VIC IC divides the DOT clock by eight and outputs this as the phase 0 clock on pin 17. The output of the Phase/Frequency Detector is applied to the frequency control input pin 2 of U31. This causes tracking of the dot clock and the color clock because one input, pin 4 of U32, is the phase 0 clock which is derived from the dot clock, and the other pin 1 of U32, is derived from the color clock.

The C64B Clock Circuits. Refer to schematic 251469

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Crystal Y1 develops the fundamental 16Mhz clock signal. U31 is a Clock Generator IC that outputs the

8.1818MHz DOT clock on pin 6, and the 14.31818 MHz color clock on pin 8.

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C64 CIRCUIT THEORY

I/O and ROM Address Decoding and Expansion Port.

I/O Address Decoding Logic

U17 is a Programmable logic array (PLA). The output F5 on pin 12 called I/o goes "low" when any of the I/O devices controlled by U15 are selected. The addresses are listed below for each device.

VIC IC $D000 - $D02E

SID IC $D400 - $D7FF

Color Ram $D800 - $DBFF

CIA 1

$DC00 - $DC0F

CIA 2

$DD00 - $DD0F

I/O 1

$DE00 - $DEFF

I/O 2

$DF00 - $DFFF

ROM Address Decoding.

Basic ROM resides at locations $A000 - $BFFF. The output F1 pin 17 of the PLA U17 goes "low" when the BASIC ROM is selected. The KERNAL ROM resides at locations $E000 - $FFFF. The output F2 pin 16 of the PLA U17 goes "low" when the KERNAL ROM is selected. The CHARACTER GENERATOR ROM resides at locations $D000 - $DFFF. The output F3 pin 15 of the PLA U17 goes "low" when the Character Generator ROM is selected.

The Expansion Port Connections.

The expansion port is an extension of the microprocessor address, data, and control bus. ROML decodes addresses $8000 - $9FFF, and ROMH decodes addresses $E000 - $FFFF. These are outputs from the PLA used to select the catridge inserted in the expansion port. I/O 1 input from U15 decodes addresses $DE00 - $DEFF. I/O 2 output from U15 decodes addresses $DF00 - $DFFF.

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C64 CIRCUIT THEORY

RAM Control Logic.

U13 and U25 are multiplexers. The address output from the microprocessor are passed to RAM via U13 and U25 when the output Address Enable Control (AEC) from the VIC IC is "high". When AEC is "low" the VIC IC outputs refresh addresses on pins 24 - 31. AEC goes "low" when the system clock, phase 2, is "low". Since all I/O decoding occurs when phase 2 is "high", refresh is transparent to the processor.

Eight 4164 DRAMS provide 64k bytes of memory. One 2114 RAM (U6) provides 512 bytes of memory allocated for screen color data storage.

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C64 CIRCUIT THEORY

5 Pin Video and Audio Output Circuits

Pin 15 of the VIC IC is the sync/luminance output. Pin 14 is the color output. A composite video output is created by mixing sync/luminance and color. The composite output is applied to the RF modulator, and also passed to the monitor connector CN5 on pin 4. The color output is not made available on the monitor connector CN5 as on the 8 pin version, and the RF modulator mixes audio with the composite video producing the TV RF output, unlike the 8 pin version RF modulator which creates the composite video output.

Page 15

C64 CIRCUIT THEORY

8 Pin Video and Audio Output Circuits. Refer to schematic 21469

U19 is the Video Interface Chip (VIC). Sync (horizontal and vertical), and luminance (video) is output on pin 15. This signal is passed to pin 2 of the RF modulator. Color is output on pin 14, and passed to pin 3 of the modulator. Light pen inputs are sensed by the VIC IC on pin 9. U18 is the Sound Interface Device (SID). The audio output is on pin 27, and audio input is on pin 26. The RF modulator mixes sync/luminance, color, and audio out, generating a TV composite signal on pin 5. The RF modulator also passes the VIC outputs to the monitor connector CN5. Audio out on pin 27 is amplified by Q2, and output on pin 3 of CN5. Audio in is applied to pin 5 of CN5, then to pin 26 of the SID IC. Inputs from paddles connected to on of the control ports are monitored by the SID IC on pins 23 and 24.

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C64 CIRCUIT THEORY

The Cassette Interface Circuits.

U7 is a 6510 microprocessor. One of the features of the 6510 is a built in parallel I/O port (P0-P5). P3 - P5 control most of the cassette interface circuitry. P3 pin p6 of U7 outputs the write data signal to connector CN3 on pins E and 5. P4 is an input that senses the play switch depressed on the cassette deck. P5 is on output that controls the cassette motor. When P5 goes "low", Q2 cuts off, CR2 regulates Vb of Q1 at 7.5 volts, this forward biases Q1 and Q3, passing current through the cassette motor coil. U1 is a Complex Interface Adapter (CIA). Parallel ports, serial outputs, and Timers are standard features of the CIA. Read data enters on pins D, 4 of CN3. U1 accepts the read data signal on the FLAG input pin 24.

Page 17

C64 CIRCUIT THEORY

Keyboard, Joystick, and Paddle Interface Circuits.

Keyboard Interface

U1 is a Complex Interface Adapter (CIA). Both parallel ports are used to decode the keyswitches on the keyboard. Parallel port A signals (PA0 - PA7) are outputs. PArallel port B signals (PB0 - PB7) are inputs. A "0" bin is shifted through the parallel port A, when a key is depressed on the keyboard the "0" bit is returned on one of the parallel port B inputs. A program in the KERNAL ROM generates the shifting "0" bit output on parallel port A, and decodes the signals returning on the parallel port B inputs. Depressing the restore key causes U20 to trigger. U9 pin 6 goes "low" generating a Non- Maskable Interrupt (NMI) at the processor. This causes the processor to execute a subroutine which initializes the I/O interfaces. If the STOP key is depressed at the same time, BASIC flags are initialized.

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Joystick Interface

U1 also controls the joystick. Parallel port A accepts inputs from the B joystick connected to control port 2. Parallel port B accepts inputs from the A joystick connected to control port 1. When the joystick is moved up, down, left, right, or the fire button is depressed, a ground potential is applied to the appropriate input of U1.

Paddle Interface

A Variable resistor is connected to adjusting knob on the paddle. When the knob is rotated, the resistance varies controlling the time constant of an RC network. The Voltage developed across the capacitor is input to an A/D converter internal to the SID chip U18. The digital output is stored in one of the SID registers. The paddle position can be determined by the reading the contents of the appropriate register. U28 is a 4066 CMOS switch. The signals from the paddles are passed to the SID chip when the Enable inputs (E0 - E3) of U28 are "high".

NOTE:

U1 port assignments are incorrect on schematics. Refer to Keyboard Matrix for correct assignments.

Page 19

C64 CIRCUIT THEORY

The Serial Interface and User Port Circuits

The Serial Interface.

U2 is a Complex Interface Adapter (CIA). Parallel port signals PA3-PA7 control the serial bus interface. PA3 is the Attention (ATN) output. This signal is inverted by U8 before being transmitted to a device on the bus. PA4 is the clock output. Data transmitted from the C64 to a device on the bus is synchronized by this clock signal. U8 inverts the output PA4. PA5 is the data output. U8 inverts this output also. Data transmitted from a device on the bus to the C64 is synchronized by a clock generated by the transmitting device. The Clock signal is input on PA6. Data transmitted from a device on the bus to the C64 is input on PA7. When a device on the bus wants to communicate with the C64, SQR IN goes "low" indicating service is requested.

The User Port

Parallel port B of U2 (PB0 - PB7) is made available on the user port. Parallel data transfers with external device are made very easily through this parallel port. SP2 and SP1 are bi-directional serial ports. CNT1 and CNT2 are bi-directional synchronizing clock signals for each serial bus.

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64 TROUBLESHOOTING GUIDE

SYMPTOM

Blank screen on power up.

Out of memory error on power up.

No cursor displayed. Intermittent blank screen.

Powers up with graphics display and blinking cursor

Powers up with all the characters displayed as blocks.

Intermittent display.

Powers up with the 'PRESS PLAY ON TAPE' message and the display blanks

On power up the cursor lock up.

When 'RETURN' is pressed after a run command, the cursor goes back to home position.

Poke command does not work.

Joystick does not operate correctly.

Wrong frequency.

No character lettering is displayed on the screen.

Graphic characters instead of letters displayed.

Power up message appears but no cursor.

POSSIBLE SOLUTION

Check External Power Supply U4 (KERNAL ROM), U17 (PLA) U7 (6510 MPU), U3 (ROM) U8 (7406 IC), U19 (VIC II) U9-U12 (4164 RAM) U21-U24 (4164 RAM) BT2, CR4, VR1

Check U9-U12 (4164 RAM) U21-U24 (4164 RAM) **** USE DIAGNOSTIC TEST - DISK

Check U1, U15, U7 Check U2, U7

Check U14 (74LS258 IC)

Check U26 (74LS373 IC)

Check C88 (Possible Bad Connection)

Check U7 (6510 MPU) R1 (Possible Bad Connection)

Check U7 (6510 MPU) U20 (556 IC)

Check U3 (ROM)

Check U1, U28 (6526 CIA)

Check C70

Check U3 (ROM) U2 (CIA)

Check U19 (VIC II)

Check U1, U15, U7 and U4

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SYMPTOM

Cursor jumps to back to home position.

Abnormal colors appear in the letters.

Different characters are displayed and cursor is locked when turned on and off. Check RAM

System does not reset and the 'RESTORE' key does not work.

White band scrolls down the screen. (60 HZ HUM)

Cursor disappears after the system warms up.

SYNTAX ERROR displayed after system warms up.

Wavy screen after the system warms up.

The system resets when it warms up.

Keyboard does not operate correctly when the system warms up.

Black band scrolls through screen when the system warms up.

Cassette motor keeps running.

Cassette motor keeps running even after a program is done loading. The TIP 29 transistor gets extremely hot and the fuse may possibly blow.

The cursor disappears when the cassette is plugged in.

Cassette runs extremely slow. The program seems to load but will not run.

When loading from cassette, the 'SYNTAX ERROR' message is displayed.

DEVICE NOT PRESENT ERROR is displayed when disk is used.

Disk drives continue to search when trying to load.

When loading from disk and any key of the 4th row of the keyboard is pressed, the cursor goes to home position.

When loading from disk, a 'FILE NOT FOUND' message is displayed.

OUT OF MEMORY is displayed when disk is used.

SYMPTOM

POSSIBLE SOLUTION

Check U7 (6510 MPU)

Check U6 (2114 RAM) U16 (4066 IC)

Check U20 (556 IC)

Check External Power Supply VR2 (5V Regulator)

Check U1 (6526 CIA)

Check RAM, U3 (ROM)

Check External power supply U31 (74LS629 IC) U30 (74LS193 IC)

Check U7 (6510 MPU) U3 (ROM)

Check U1 (6526 CIA) U3 (ROM)

Check External Power Supply C90, C88, CR4 VR2 (5V Regulator)

Check U7 (6510 MPU)

Check Cassette Port for Shorts R4 (Possibly Open)

Check U7 (6510 MPU)

POSSIBLE SOLUTION

Check U20 (556 IC)

Check U1 (6526 CIA) U7 (6510 MPU) R28, R29, R30

Check U2 (6526 CIA)

Check U20 (556 IC) R35 (Possible Bad Connection)

Check U4 (ROM) U2 (6526 CIA)

Check U20 (556 IC)

Page 22

C64 BOARD IDENTIFICATION

To date there are 4 version of 64 PCB assemblies in use.

VERSION

Original

A (CR)

B-2

IDENTIFYING FACTORS

5 pin board (CN5-Video port has 5 pins)

8 pin board (CN5-Video port has 5 pins)

8 pin board (Reduced oscillator circuit)

8 pin board

PCB ASSY #

326298-01

250407-04

250425

250441-01*

SCHEMATIC #

326106

251138

251469

These boards are interchangeable with casework, keyboard, etc.; however, care must be taken to provide the customer with a unit that is compatible with their monitor and cable.

When component level repairs are necessary, be certain to acquire the appropriate part for the board you are repairing. Most modulators are different, as are many of the components.

* The 4th version of 64 board was recently developed and only a few may be in the field. It is termed the 64B-2. All circuits remain the same as the 64B (Schematic 251469) with a few component location changes:

1) Resistors 28, 29, 30, 36, 48 were reduced to Resistor Pack RP5.

2) Diodes CR100-105 are no longer piggybacked. Their new locations are CR9, 12-16.

Page 23

Page 24

PARTS LIST - PCB ASSEMBLY #326298

C - Indicates Commodore Stocked Part Numbers

INTEGRATED CIRCUITS

RESISTORS (continued)

U1,U2 6526 CIA

2364 Basic ROM C 901226-01

2364 Kernal ROM C 901227-03

2364 Char ROM

2114L-30 RAM

6510 uProcessor

7406

U9-U12 4164 (200 nS)

U13

74LS257

U14

74LS258

U15

74LS139

U16

4066

U17

82S100 PLA

U18

6581 SID

U19

6567 VIC II

U20

LM556

C 906108-01

C 901225-01

901453-01

C 906107-01

901522-06

901505-01

901521-57

901521-58

901521-18

901502-01

C 906114-01

C 906112-01

C 906109-04

901523-03

R14

R16

R17

R19

R20

R21

R22

R23

R24

R25

R26

R27

R28

R29

NOTE:

100

1.2K

15K

6.8K

4.7K

1.5K

3.3K

Pot 1K

Pot 2K

The input video line requires a 470 ohm, 1/4 watt, resistor soldered to ground.

R30

R31

R33

R34

R35

R37

R38

R39

R41

R43

R44

R45

R46

R51

180

47K

470K

2.7K

390

3.3K

1.5K

U21-U24 4161 (200 nS)

U25

U26

U27

U28

U29

U30

U31

U32

74LS257

74LS373

74LS08

4066

74LS74

74LS193

74LS629

MC4044

TRANSISTORS

Q4-8

2N4401

2N3904

TIP29 B

2N2222

901505-01

901521-57

901521-29

901521-03

901502-01

901521-06

901521-26

901521-68

906128-01

902652-01

902658-01

902653-01

902686-01

RP1,2 33, 8 Pin (Bourne No. 430BR-102-330)

RP3

33K, 8 Pin (Bourne No. 430BR-101-332)

RP4

3.3K, 10 Pin

C1-3

Ceramic

C4-7

Ceramic

C10-11 Ceramic

C12-15 Electrolytic

C16

C17

C18

Electrolytic

Ceramic

Electrolytic

Ceramic

RESISTOR PACKS

CAPACITORS

.1 uF, 50V

.47 uF, 50V, 20%

10 uF, 25V, +50%, -10%

.47 uF, 50V, 20%

470 pF, 50V

10 uF, 25V, +50%, -10%

.1 uF, 50V

10 uF, 25V, +50%, -10%

.1 uF, 50V

C19

Electrolytic

Ceramic

DIODES

CR1

2.7V Zener IN4371

CR2

7.5V Zener IN755

C20,21 Film

C22

2200 uF, 16V

.22 uF, 100V, 20%

.1 uF, 50V

Page 25

CR3

1/4W,

C30,31,32

C45,46,47

Electrolytic

CR4

IN914

Bridge, Varo VMO8 906129-01

C23

Ceramic

Electrolytic

C24

360 pF, 50V

10 uF, 25V, +50%, -10%

CR5,6 Rectifier IN4001

RESISTORS - All values are in ohms-

5%, unless noted otherwise.

3.3K

1.5K

10K

560

R10 120

R11 120

R13 1K

10K

390

PARTS LIST - PCB ASSEMBLY #326298 (Continued)

C - Indicates Commodore Stocked Part Numbers

CAPACITORS (Continued)

C38

C39

Ceramic 51 uF, 50V

Ceramic .1 uF, 50V

C25-28 Ceramic

C29

Ceramic

C33

Ceramic

Electrolytic

Ceramic

C34

C35

C36

C37

C94 Electrolytic

C95,96 Ceramic

CAPACITORS (Continued)

.22 uF, 50V

.47 uF, 50V, 20%

.1 uF, 50V

.47 uF, 50V, 20%

10 uF, 25V, +50%, -10%

.1 uF, 50V

20 pF, 50V

1000 pF, 50V

10 uF, 25V, +50%, 10%

.1 uF, 50V

C40-43 Ceramic .22 uF, 25V, +50%, -10%

C44

Ceramic .47 uF, 50V, 20%

Ceramic .1 uF, 50V

C48

Ceramic 1800 uF, 50V

C49

Ceramic 470 pF, 50V

C50

Ceramic .22 uF, 50V

C51

Ceramic .47 uF, 50V, 20%

C52,53 Ceramic 470 pF, 50V

C54

Ceramic .22 uF, 50V

C55

Ceramic .1 uF, 50V

C56

Ceramic .1 uF, 50V

C57

C58

Ceramic .1 uF, 50V

C59

Ceramic .22 uF, 50V

C60,61 Ceramic .47 uF, 50V, 20%

C62

10 uF, 25V, +50%, -10%

C97 Ceramic

C98,99 Ceramic

C100 Ceramic

C101 Ceramic

C102 Electrolytic

C103 Ceramic

C105 Ceramic

CN1 Header Assy 20 Pin

CN4 6 Pin Din

CN5 5 Pin Din

CN6 44 Pin Card Edge

CN7 7 Pin Din

CN8,9 Plug Assy, 8 Pin Rt. Angle C 906126-01

CN10 Header Assy, 3 Pin

CONNECTORS

.22 uF, 25V

.1 uF, 50V

.22 uF, 25V

.1 uF, 50V

10 uF, 25V, +50%, 10%

.1 uF, 50V

903331-20

C 903361-01

C 903362-01

C 906100-02

C 906130-01

C63

Ceramic .47 uF, 50V, 20%

C64,65

C66,67 Ceramic .47 uF, 50V, 20%

10 uF, 25V, +50%, -10%

MISCELLANEOUS

L1,2 Coil Inductor 2.2 uH

901151-17

Page 26

C68

Voltage Regulator MC7812CT

Voltage Regulator MC7805CT

Electrolytic

C69

C70

C71

C72

C73

C74

C77

C78

C79

C80

C81

C82

C83

C84

C85

Ceramic .1 uF, 50V

Mica

10 pF, 500V, 5%

Ceramic .1 uF, 50V

Ceramic 220 pF, 50V

Ceramic 150 pF, 50V

Ceramic .1 uF, 50V

Ceramic 220 pF, 50V

Ceramic 510 pF, 50V

Ceramic 51 pF, 50V

Ceramic 20 pF, 50V

Ceramic .1 uF, 50V

Mica

.33 pF, 500V, 5%

Ceramic .1 uF, 50V

Ceramic .47 uF, 50V, 20%

Coil Inductor 3.0 uH

Filter Line Assy

Coil Inductor 1.2 uH

Crystal 14.31818 MHz

SW1 Rocker Switch DPDT

VR1

VR2

M1 Modulator

Fuse, Normal Blo, 250V, 1.5A

FB1-

Ferrite Bread

Connector Panel

(ON, OFF, Joystick)

Catridge Guide

Shield Box

Shield Cap

901151-21

C 906127-01

901152-01

C 900558-01

C 904500-01

C 326130-01

903025-01

326299-01

326116-01

C 326265-01

C 326267-01

C86

C87

C88

C89

C90

C91

C92

C93

Mica

Ceramic .1 uF, 50V

Ceramic .22 uF, 50V

Ceramic 1800 uF, 50V

39 pF, 500V, 5%

470 uF, 50V

100 uF, 16V

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