cpu board logic diagram created by: richard harvey 1j2 1j4

CPU Board Logic Diagram (System 4)ISSUE NUMBER 1.2 (28 NOV 2009)

CREATED BY: Richard Harveywww.f i repowerpinbal l .com

NOTES:1. ALL RESISTORS 1/4W UNLESS OTHERWISE INDICATED.2. ALL CAPACITORS ARE MFD UNLESS OTHERWISE INDICATED.3. C68 NOT USED ON ALL GAMES4. IC11 pins 1,2,12 &13 SHOWN ON ORIGINAL WMS DIAGRAM AS IC125. RESET CIRCUIT MODIFICATION FROM SYSTEM 3: REMOVE C27, R30 AND R40 ADD 10K RESISTOR R96 FROM THE COLLECTOR OF Q2 TO THE CATHODE OF ZR1.

1J2LOGIC POWER BUS INPUT

Grey/White (Logic B+ [+12 V Unregulated]) 9

N/C (Not used) 8

KEY 7

Grey (Logic B+ [+5 VDC]) 6



Black (Logic Ground) 3



Violet/Brown (Display Strobe #9) 9

Violet/Red (Display Strobe #10) 8

KEY 7

Violet/Orange (Display Strobe #11) 6

Violet/Yellow (Display Strobe #12) 5

Violet/Green (Display Strobe #13) 4

Violet/Blue (Display Strobe #14) 3

Violet/Black (Display Strobe #15) 2

Violet/Grey (Display Strobe #16) 1

Brown/Black (Display Strobe #1) 9

KEY 8

Brown/Red (Display Strobe #2) 7

Brown/Orange (Display Strobe #3) 6

Brown/Yellow (Display Strobe #4) 5

Brown/Green (Display Strobe #5) 4

Brown/Blue (Display Strobe #6) 3

Brown/Violet (Display Strobe #7) 2

Brown/Grey (Display Strobe #8) 1

Blue/Green (Display BCD A2) 9

Blue/Black (Display BCD B2) 8

Blue/Violet (Display BCD C2) 7

KEY 6

Blue/Grey (Display BCD D2) 5

Blue/Brown (Display BCD A1) 4

Blue/Red (Display BCD B1) 3

Blue/Orange (Display BCD C1) 2

Blue/Yellow (Display BCD D1) 1

1J5MASTER DISPLAY BCD OUTPUTS

1J6MASTER DISPLAY STROBE OUTPUTS

1J7MASTER DISPLAY STROBE OUTPUTS

Blue (Diag Auto/Manual) 4

Green (Diag Advance) 3

White (Diag Common GND) 2

Black/Red (KEY on System 4) 1

1J4DIAGNOSTIC SWITCH INPUTS.

Blue/White (Display Blanking) 4

KEY 3

N/C (Not used) 2

N/C (Not used) 1

1J3DISPLAY BLANKING

TP1 +12V. UNREGULATED1J2-9 and Cathode of ZR1

TP2 NMI IC1 pin 6, IC24 pins 2 & 11

DIAGNOSTICSWITCH

DEPRESSED

+5V.

0V.

TP4 BLANKINGIC23 pins 9 & 13, 1J1-37

NORMALOPERATION BLANKING

+5V.

0V.

TP5 IRQIC1 pin 4, IC23 pin 5

DIAGNOSTICSWITCH

DEPRESSED

+5V.

0V.30uS

1MS

TP6 BUS 02IC11 pin 1, IC5 pin 7,IC13&16 pin 10, 1J1-9

+5V.

0V.1.1uS

TP7 CMOS RAM B+Cathode of D17 POWER ON 4.3V. POWER OFF 3.9V.

POWERTURN ON

+5V.

0V.

TP8 RESETIC1 pin 40, IC18 pin 34, 1J1-1

1MSTP9 +5VIC1 pin 8,IC18 pin 20,1J2-4, 1J2-5 & 1J2-6

TP10 GNDIC1 pin 1,IC18 pin 1,1J2-1, 1J2-2 & 1J2-3

VALUES & TEST LOCATIONS

A few suggested test point locations

TP1

TP2

TP5

For the following indications of the LEDs, proceed as follows:Indicates ROM/PROM failure; one or more ofIC17, IC20, IC21, IC22, and IC26 are faulty.

OFFON

Indicates RAM failure (IC13 or IC16).ONOFF

Indicates CMOS RAM (IC19) failure. ONON

LEDs REMAIN ON AFTER POWER TURN-ON a) Check +5 VDC and Unregulated Logic B+ on CPU and Power Supply boards. If low: i) Check AC input from transformer. ii) Check wiring from transformer to 3P1 (Power Bus Inputs) -10, -11 and -12. iii) Check 3D6 and 3D7. iv) Replace Power Supply Board

b) Turn game OFF and completely remove Driver Board from the backbox. Reapply power and depress the DIAGNOSTIC pushbutton on the CPU board. If the LEDs blink twice and then remain OFF, replace the Driver Board. Otherwise, replace the CPU board.

LEDs DO NOT FLASH AND REMAIN OFF WHEN DIAGNOSTIC SWITCH DEPRESSED a) Turn game OFF and back ON. b) If problems persist, check +5 VDC from power supply, if ok, replace the CPU board.

INTERMITTENT OPERATION a) Make checks described above (for LEDs remaining on after power turn-on). b) Replace CPU board.

GAME COMES UP IN TEST 04 WHEN TURNED ON a) Check battery voltage from the Anode of 1D17 to ground, if less than 3.9 VDC, replace batteries. b) Check battery voltage from Cathode of 1D17 to ground, if less than 3.2 VDC, replace diode.

A8

24 21

C14.01

12 18

A7 1 A7A6 2 A6A5 3 A5A4 4 A4A3 5 A3A2 6 A2A1 7 A1A0 8 A0

D0 9 D0D1 10 D1D2 11 D2

D5 15D4 14D3

D7D6

D516 D617

19

20

23

D7

D4D313

A10

A8A9

A10

22A9

CS1

Vcc CS3

CS2GND

IC202316ROM7000

ADDRESS

89

11IC11

7410

10

7

14

C8.01

A13

A14

VMA

IC157442

A11

A12

N.C.N.C.N.C.

9

1110

12131415

7

16

C19.01

GND

Vcc

C

AB

D987

2

01

3456

21

34567

N.C.N.C.N.C.

N.C.

IC256

4

7402 5

IC25

7402

2

3

1

14

C65.01

7

1J1-21A0

1J1-20A1

1J1-27A2

1J1-28A3

1J1-29A4

1J1-30A5

1J1-31A6

1J1-32A7

1J1-33A8

1J1-23A9

1J1-13A10

1J1-34A11

1J1-8A12

1J1-24A13

1J1-7A14

1J1-35A15

1J1-18D0

1J1-17D1

1J1-16D2

1J1-15D3

1J1-14D4

1J1-12D5

1J1-11D6

1J1-10D7

1J1-5N.C.

1J1-4N.C.

1J1-3N.C.

1J1-2

1J1-1

+5v

24 22

C16.01

12 21


9 D010 D111 D2

D5 15D4 14D3

D7D6 16

17

18

19

20

23

13

CS4

CS3

A8

CS2

Vcc1 Vcc2

CS1GND

IC223624

FPROM6200

ADDRESS

A8

A9

J9

A10

A10

A8

24 22

C67.01

12


9 D010 D111 D2

D5 15D4 14D3

D7D6

D516 D6

17

181920

23

D7

D4D313

CS4

CS0

A8

CS2

Vcc1 Vcc2

GND

IC263624

FPROM6400

ADDRESS

A10

CS121 A9

D5

D4

D3

D7

D6

SW1DIAGNOSTIC

SWITCH

R334.7K

C34.01

IC24

7400

N.O.

N.C.

12

3

R344.7K

IC24

7400

12

1311

C33.01

R83.3K

J10

R73.3K

IRQ

'

IRQ

IRQ

IRQ

IRQ’

IRQ

IRQ’NMI

BUS O2| BUS O2|

BUS O2|

DAT

A B

US

DAT

A B

US

DAT

A B

US

DATA BUS

ADDRESS BUS

AD

DR

ES

S B

US

AD

DR

ES

S B

US

A8

24 22

C15.01

12

21


D0 9 D0D1 10 D1D2 11 D2

D5 15D4 14D3

D7D6

D516 D617

181920

23

D7

D4D313

CS4

CS3

A8

CS2

Vcc1 Vcc2

CS1

GND

IC213624

FPROM6000

ADDRESS

A8

24 21

C12.01

12 18


D0 9 D0D1 10 D1D2 11 D2

D5 15D4 14D3

D7D6

D516 D617

19

20

23

D7

D4D313

A10

A8A9

A10

22A9

CS1

Vcc1 CS3

CS2GND

IC142316ROM6000

ADDRESS

A8

24 21

C13.01

18


D0 9 D0D1 10 D1D2 11 D2

D5 15D4 14D3

D7D6 16

17

19

20

23

13

A10

A8A9

A10

22A9

CS1

Vcc CS3

CS2GND

IC172316ROM7800

ADDRESS

A9

12

D0

D1

D2

AD

DR

ES

S B

US

D5D6

D7

D4D3

AD

DR

ES

S B

US

AD

DR

ES

S B

US

1J1-40

1J1-36N.C.

1J1-38N.C.

1J1-39

1J1-37BLANKING

1J1-25VMA

1J1-22IRQ'

1J1-19RESET

1J1-26ST6

1J1-6R/W

1J1-9BUS 02

GND

1J3-4

1J3-3KEY

1J3-2N.C.

R704.7K

R45

1K C62470pFD.

1J3-1N.C.

RESETST6

R/WVMA

R2233K

C311.0

+ C30.01

12

13 R–

11

9

10

Q52N4403

R233.3K

C32.05

DisIC23½ 556

Thr

8Tr

Out

C.V.

IC710 11

7404IC78 9

7404

R–

DisIC23½ 556

ThrTr

Out

C.V.GND

Vcc14

C63.01

C29.01

5

3

R912K

R211.8K

C28.01

+

1

2

6 7

RESETST6

R/WVMA

VMAR/W

VMA

R/W

R/W

R/W

VMA

VMA

VMA

BUS O2|

R/W

IC48T97

E4E2 GND

Vcc3 2

46

101214

5791113

A0

A1

A2

A3

A4

A5

151 8

IC38T97

E4E2 GND

Vcc3 2

46

101214

5791113

A6

A7

A8

A9

16

151 8

C5.01

A10

16C6.01

CR

13.

58 M

Hz

BUS O2|

A11

5

76

4

21R1

1K

R433

R533

R63.3K

C681SeeNote#3

C3.01

C3.01

C122

(tant)

+

IC56875

GND83

RX T

x1x2

4x5xMR

N.C.N.C.

1012

1413

1516

R247K

R364.7K

R354.7K

RESET

SYSTEMRESET

O2|

L115µH

C66120 pFD.

A422

C22.01

8 17

1 A32 A23 A14 A05 A56 A67 A7

DI1109

D0111 DI212

D0

D1

D3

D2D02

DO4 15DI3 14

DO3

OD

DI4 16

18

19

21

13

A420R/W

CE1

Vcc

CE2GND

IC195101

CMOSRAM0100

ADDRESS

CM

OS

RA

M B

+

CMOS RAM B+

A13

A3

A2

A1

A0

A5

A6

A7

11 12

13IC12

7408

A6

R3710

D191N4148

24 10C10 .01

1 11 13

D0 2 D0D1 3 D1D2 4 D2D3 5 D3D4 6 D4D5 7 D5D6 8 D6D7

A14

12

9 D7

A0

A1

A2

A3

A4

A5

A6

R/W

A023A122

A815A1314

A221A320A419A518A617

16

Vcc CS0

CS1GND

IC166810RAM0080

ADDRESS

CS2 CS5

CS4CS3

8 10A7

9IC12

7408

IC712 13

7404

14

C7.01

7

IC77404

6

5

24

C9.01

1 10

D0 2 D0D1 3 D1D2 4 D2D3 5 D3D4 6 D4D5 7 D5D6 8 D6

D7D7 9

A023A0A122A1A221A2A320A3A419A4A518A5A617A6

A815A1314

13

R/W 16

1112

Vcc

GND

IC136810RAM0000

ADDRESS

CS0

CS5CS4CS3

CS1CS2

A14

A1

IC28T28

1R/E

Vcc D/E

RO1

RO2

D1

B1

RO4

RO3

D4

B4

2

43

5

7

14

1213

11

9

1516

C4.01

R11LED 2

100

R194.7K

N.O.SW2INPUT

ENABLESWITCH

R12LED 1

100

R201K

O2

B26O3

B310

GND8

8R15 ON

DS1DIP SWITCHES

ALL4.7K

ALLIN4148

D16

7R16 D15

6R18 D14

5R17 D13

4D12

3D11

2D10

1D9

8

OND8

7D7

6D6

5D5

4D4

3D3

2D2

1D1

IC64 TO 16

DECODER74154

123456789

1011

Vcc24

C21.01

123456789

15

0

1812G G1 G2

19

23 10

1213

11

14

1314151617

ABCD

222120

IC186820

(or 6821)

PIA I2800 -2803

PA0PA1PA2

PA3

PA4

PA5

PA6

PA7

PB0PB1PB2PB3

PB4

PB5PB6

PB7

CB1

CB2

R/W

2345678910111213141516171819

40393837363534

3332313029282726252423 ST6

21

A0

A1

A11

A14

CA1CA2

IRQA

IRQBRS0

RS1RESETD0

D1D2

D3

D4

D5

D6D7

ECS1

CS2

Vcc

Vss CS0

20

1 22

C20.01

D0

D1

D2

D3

D4

D5

D6

D7

SYSTEM RESET

SY

STE

MR

ES

ET

A1332

1

IC127408

VMA

14

C11.01

7

IC24

7400

64

5

IC247400

8

10

9

14

C35.01

7

R/W

1J5-1 D1R94

ALL1K

1J5-2 C1R93

1J5-3 B1R92

1J5-4 A1R91

1J5-5 D2R90

1J5-7 C2R89

1J5-8 B2R88

1J5-9 A2R87

1J5-6KEY

BC

D O

UTP

UTS

ALL470 pFD.

R62

R63

R64

R65

R66

R67

R68

R69

ALL4.7K

C54

C55

C56

C57

C58

C59

C60

C61

1J6-1 16R86

ALL1K

1J6-2 15R85

1J6-3 14R84

1J6-4 13R83

1J6-5 12R82

1J6-6 11R81

1J6-8 10R80

1J6-9 9R79

1J6-7KEY

ALL470 pFD.

R54

R55

R56

R57

R58

R59

R60

R61

ALL4.7K

C46

C47

C48

C49

C50

C51

C52

C53

1J7-1 8R78

ALL1K

1J7-2 7R77

1J7-3 6R76

1J7-4 5R75

1J7-5 4R74

1J7-6 3R73

1J7-7 2R72

1J7-9 1R71

1J7-8KEY

ALL470 pFD.

R46

R47

R48

R49

R50

R51

R52

R53

ALL4.7K

C38

C39

C40

C41

C42

C43

C44

C45

DIS

PLA

Y S

TRO

BE

OU

TPU

TS

3

4567

91011121314

151617181920

A0

A1

A2A3

A4

A5A6

A7

A8

A9A10

A11

D0

R/W

DBE

BA

MR

VMA

D1

D2D3

D4

D5D6

D7

A15

A14A13

A12

3334

3637

3231

403938

302928272625242322

IC16808

Vss1 Vss2

HALT

IRQ

NMI

02

RESET

35

2

8

IC88T97

E4E2 GND

Vcc

46

101214

5

791113

A15A14

A13

A12

151 8

C18.01

1 21

IC98T28

GND

Vcc

DE

16

8

C64.01

RE

IC108T28

GND

VccDE

2 & 4 35 & 7 6

115

9 & 11 10

16

8

C17.01

12 & 14 13

D0

D1

D2

D3

RE

N.C.

N.C.

21

R333

R103.3K

RE

SE

T

32

16

Vcc

IC71 2

7404

IC73 4

7404

IC11

7410

IC12

7408

345

5

4

66

IC11*2

12113

7410

*SEE NOTE #4Mistake in original diagram

R42 47K

R45 470

1J4-4

1J4-3

1J4-2

1J4-1

DIA

GN

OS

ITC

SW

. IN

PU

TS

KEY

R44 470

R43 47K

C36.01

C37.01

IRQ

UNREG.+12V.DC

+5 V

.D.C

1J2-9

N.C. 1J2-8

KEY. 1J2-7

1J2-6

1J2-5

1J2-4

1J2-3

1J2-2

1J2-1 GR

OU

ND

C23100

C24.1

+B1

1.5V.

+

B21.5V.

+

B31.5V.

+- - -

D171N4148

D18

1N4148R241K

Q62N4401

Q32N4401

R251K

R391K

Q12N4401

R3210

R381K

R3110K

R4110K

R261K

R2710K

Q22N4401

R9610K

R281K

R2910K

ZR1

6.8V ZENERTP7

CMOSRAMB+

+12v DCUNREG.

TP4

TP6

4

TP8

D4

D5

D6

D712 & 14 13

D4

D5

D6

D7

2 & 4 35 & 7 6

115

9 & 11 10

Q42N4403

cpu board logic diagram created by: richard harvey 1j2 1j4

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