Basic HTML Version
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Drop Target Lubrication
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3-3
Drop Target Lubrication Drawing
3-4
Cleaning the Playfield.................................................................................................. 3-5
Control Board Error Detection........
3-6
Operation With One·Display
3-6
Chapter 4: Troubleshootlng ...........................................•........•...... 4-1
Game Won't Power Up...
4-2
Control Board Power-Up Test Sequence................................................................. 4-2
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Lamps Always On or Off During Gameplay.............................................................. 4-3
The Biphase Lamp Circuit: A Coser Look
4-4
Remedies for "Tough Dog" Lamp Problems
4-6
Phase "A" and
"O"
Lamp Table
4-5
Phase "B" and "0" Lamp Table
4-5
Remedies for "Tough Dog" Lamp Problems
4-6
Typical Biphase Lamp Circuit...............
4-7
Improper Display Digits.
4-9
Improper Display Pattems
4-10
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One or Several Displays Always Off
4-11
No Ripper Solenoids
.4-12
Rippers: A Closer Look
4-13
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Remedies for "Tough Dog" Flipper Problems
4-14
Coils Not Operating COrrecUy
4-15
Coils Always On
.4-16
Coil Table (including Flipper Coils }
4-17
Typical Momentary Solenoid Driver Circuit.
.4-19
Solenoid Expander
4-20
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Remedies for "Tough Dog" Coil Problems
.4-21
Switches Don't Score
4-22
Typical Playfield 'Switch Circuit. .................•.........................•......................................
4-22
Switch Matrix Table.......................................................•..............................................4-23
No SOund
.4-25
Sound Interface Board
4-28
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