2008T Troubleshooting Guide
P/N 490292 Rev. A
ABPF- 1.0.4 ISOLATE POWER CONTROL BOARD OUTPUT
a) Turn the machine off and UNPLUG it. CAUTION! Electrocution hazard if not unplugged
b) Slide the power supply away from the
cabinet. Figure right, inside is the
Power Control Board where the 24V
Power Harness terminates.
c) ENSURE harness is plugged in
securely. If NOT, this may be the
problem!
d) Remove the board from its four plastic
clips and remove the two front screws.
e) Lay the rear panel down to access to
the rear (solder) side of the board Power
Control Board.
f) Plug the machine in.
CAUTION! High voltage now present!
g)
Per the Figure below, HOLD the red meter lead at the rear (solder) side, at pin 8, of the 24 V
Power Harness connector X1.
h) WITHOUT LOOKING AWAY from the meter, turn the machine ON (fan running) and watch for forty (40)
FULL seconds.
i) More than 23.0 volts DC (V
DC
) seen at ANY TIME EVER during the 40 seconds?
Yes More than 23.0 volts DC seen. Referring to Figure 134 (page 724), the 24 V Power Harness
is bad.
No Never more than 23.0 volts! The Power Control Board may be bad.
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