Score Pc Board Replacement; Service Checks/ Material Returns - NAMCO Air Combat Operator's Manual

To replace the Score PC Board, following this procedure:
1) Insure that the game power is off.
2) Open the back door of the Marquee Cabinet and remove all the connectors
on the Score PC Board. See Illustration X-25.
3) Remove the four (4) screws securing the Score PCB to the cabinet.
4) Replace PCB with a new one, and return the defective board to your
distributor. DO NOT ATTEMPT TO REPAIR IT ON SITE.

9. SERVICE CHECKS/ MATERIAL RETURNS

If you suspect the game may be malfunctioning, the following steps should be consid-
ered before you make a service request.
(1) The supplied power should be between 1 lo-120 Volts AC. However, when other
equipment (air conditioners, multiple pinball games, air compressors, etc.) is con-
nected to the same power source, the voltage may change beyond this range and
cause game problems or improper operation. To guard against this, each CRACKY
(2) When the game does not work with the power turned on, turn the power off once and
then back on. This may restart the game. If it still does not work, inspect the fuses.
(3) Check all wiring connections as malfunctions can be caused by loose connections.
(4) Foreign substances, including dust on the game PCB or optics, may cause malfunc-
tions or improper operation. Check that the PCBs, optics, and drive assemblys are
clean.
(5) When you make electrical checks, use the wiring diagrams for reference.
* If the above suggestions are not applicable, or no improvement is observed, contact
your distributor or the service office printed on the back cover of this manual.
* DO NOT ATTEMPT TO REPAIR THE GAME PCB OR DRIVE ASSEMBLY
YOURSELF. Instead, please return to your distributor or directly to NAMCO
AMERICA for any repairs. The PCB contains sensitive devices that could be de-
stroyed even by the internal voltage of a multi-meter.
* When sending parts to be repaired, make sure to pack them fiily with a complete
explanation of the problem. When sending PCBs, please package them in anti-static
foam or bubble wrap, and pack them in cardboard boxes to protect against impact
damage during shipment.
BE SURE TO TURN THE POWER OFF
BEFORE REPLACING PC BOARDS
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