LEDs, fuses and maintenance
LED List
CPU Board
| LED | Function |
|---|---|
| D19 | Blanking |
| D20 | Diagnostic |
| D21 | +5vdc |
At Game Turn-On = D19 & D21 On, D20 Off
During Normal Operation = D19 Off, D20 flashing, D21 On
Power Driver Board
| LED | Function | Normal State |
|---|---|---|
| LED 1 | +12vdc, Switch Circuit | Normally On |
| LED 2 | High/Low Line Voltage Sensor | Normally On |
| LED 3 | High/Low Line Voltage Sensor | Normally Off |
| LED 4 | +5vdc, Digital Circuit | Normally On |
| LED 5 | +20vdc, Flashlamp Circuit | Normally On |
| LED 6 | +18vdc, Lamps Circuit | Normally On |
| LED 7 | +12vdc, Power Circuit (Motors, Relays, Etc.) | Normally On |
Fuse List
| Board | Fuse | Circuit | Rating |
|---|---|---|---|
| Audio Board | F501 | -25V Circuit | 3A, S.B. |
| Audio Board | F502 | +25V Circuit | 3A, S.B. |
| Dot Matrix Controller Board | F601 | +80V A.C. | 3/8A, S.B. |
| Dot Matrix Controller Board | F602 | +100V A.C. | 3/8A, S.B. |
| Power Driver Board | F101 | Lower Left Flipper | 3A, S.B. |
| Power Driver Board | F102 | Lower Right Flipper | 3A, S.B. |
| Power Driver Board | F103 | Solenoids 25-28 | 3A, S.B. |
| Power Driver Board | F104 | Solenoids 9-16 | 3A, S.B. |
| Power Driver Board | F105 | Solenoids 1-8 | 3A, S.B. |
| Power Driver Board | F106 | G.I. #2 Wht-Vio | 5A, S.B. |
| Power Driver Board | F107 | G.I. #3 Wht-Yel | 5A, S.B. |
| Power Driver Board | F108 | G.I. #5 Wht-Grn | 5A, S.B. |
| Power Driver Board | F109 | G.I. #4 Wht-Orn | 5A, S.B. |
| Power Driver Board | F110 | G.I. #1 Wht-Brn | 5A, S.B. |
| Power Driver Board | F111 | Flasher Secondary | 5A, S.B. |
| Power Driver Board | F112 | Solenoid Secondary | 5A, S.B. |
| Power Driver Board | F113 | +5V Logic | 5A, S.B. |
| Power Driver Board | F114 | +18V Lamp Matrix | 8A, N.B. |
| Power Driver Board | F115 | +12V Switch Matrix | 3/4A, S.B. |
| Power Driver Board | F116 | +12V Secondary | 3A, S.B. |
| Extra Flipper Supply Board | F901 | Upper Left Flipper | 3A, S.B. |
| Extra Flipper Supply Board | F902 | Upper Right Flipper | 3A, S.B. |
| Line Filter | Domestic Game | 8A, N.B. | |
| Line Filter | Foreign Game | 4A, S.B. |
Maintenance Information
Regular maintenance is essential to a game's continuing contribution to the operator's earnings.
Lubrication
The two main lubrication points of the Ball Shooter Lane Feeder mechanism are the pivots for the arm. Note that the mechanism of other playfield devices are somewhat similar to the Ball Shooter Lane Feeder Device; and have the same lubrication requirements as the Ball Shooter Lane Feeder Device. A switch target grease is satisfactory for these devices.
Because of the functional design (arm-actuated via solenoid plunger operation), the pivot points of the Left and Right Kickers ("Slingshots") all require lubrication as a regular servicing procedure.
Lubrication to ensure proper operation also applies to the target blades of the Drop Targets. MBI Instrument Grease, also known as Drop Target Switch Lubricant, with a Williams' part number of 20-8886, is a recommended lubricant.
Switch Contacts
For proper game operation, switch contacts should be free of dust, dirt, contamination, and corrosion. Blade switch contacts are plated to resist corrosion. Cleaning blade switch contacts requires gentle closing of the contacts on a clean business card or piece of paper, and then pulling the paper about 2 inches, which should restore the clean contact surface. Adjust the switch contacts to a 1/16-inch gap.
Cleaning
Good game action and extended playfield life are the results of regular playfield cleaning. During each collection stop, the playfield glass should be removed and thoroughly cleaned and the playfield should be wiped off with a clean, lint-free cloth. The game balls should be cleaned and inspected for any chips, nicks, or pits. Replace any damaged balls to prevent playfield damage.
Regular, more extensive, playfield cleaning is recommended. However, avoid excessive use of water and caustic or abrasive cleaners because they tend to damage the playfield surface. Playfield wax (or any carnauba based wax), or polish may be used sparingly, to prevent a buildup on the playfield surface. Do not use cleaners containing petroleum distillates on any playfield plastics because they may dissolve the plastic material or damage the artwork.