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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
Grey (Logic B+ [+5 VDC]) 5
Grey (Logic B+ [+5 VDC]) 4
Black (Logic Ground) 3
Black (Logic Ground) 2
Black (Logic Ground) 1
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
A7 1 A7A6 2 A6A5 3 A5A4 4 A4A3 5 A3A2 6 A2A1 7 A1A0 8 A0
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
A7 1 A7A6 2 A6A5 3 A5A4 4 A4A3 5 A3A2 6 A2A1 7 A1A0 8 A0
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
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
181920
23
D7
D4D313
CS4
CS3
A8
CS2
Vcc1 Vcc2
CS1
GND
IC213624
FPROM6000
ADDRESS
A8
24 21
C12.01
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
Vcc1 CS3
CS2GND
IC142316ROM6000
ADDRESS
A8
24 21
C13.01
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 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