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VGM Startup Troubleshooting Table, continued
SYMPTOM
VGM appears non-
functional.
Currency acceptor price
indicator
is
illuminated.
CAUTION:
will damage circuit boards or hard disk drive, and void warranty.
CAUSE
Power problem
Faulty
wiring
Improper jumper or
DIP
switch
settings
Faulty
circuit
boards
Don't remove or install any connector while power is turned on. Doing so
Front View of Coin Doors
7-4
REQUIRED ACTION
1.
Inspect circuit boards under low-light conditions.
Fan should be turning. These indications prove
presence of DC from power supply. Still,
voltages or signals may not be normal.
2.
Turn on VGM power. Using 20-volt DC setting on
digital voltmeter, measure DC voltages at power
connector pins.
3. Using 2-volt
AC setting on digital voltmeter,
measure same DC voltages as above. Any
unstable and may contain ripple or noise.
Turn off VGM power. Assure that wiring harness
connectors attach and fully seat onto mating
board connectors.
Verify that circuit board jumpers are set as
intended.
Check
DIP
Run power-up self-test sequence. Note errors or
1.
failures during tests. Compare LEDs with LED
indicator
status
charts.
switch
settings.
Note
discrepancies.
4
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