2008T Troubleshooting Guide
P/N 490292 Rev. A
WD- 1.0.1 ISOLATE CONTROL SIGNAL
a) Per the Figure below, locate IC2 at the top edge of the Power Logic Board.
Figure 108 – Power Logic Board / R10
b) Under IC2 are three resistors, top to bottom R8, R9 and R10.
c) Measure at the RIGHT side of
R10, at the location shown in Figure 108. TWO (2) possible scenarios:
1) IF (and ONLY if) 3.6 volts DC or more: The Functional Board is bad (to locate see Figure 4A,
page 10)).
2) IF less than 3.6 volts DC: See procedure number WD- 1.0.3 (page 617).
WD- 1.0.3 ISOLATE THE POWER LOGIC BOARD
a) Turn the machine OFF and swap in a known good Power Logic Board*. *To LOCATE the board refer to
Figure 4A AND NOTE A (page 10).
b) Turn the machine on. TWO (2) possible scenarios:
1) IF “WD: Fail Long Pulse” OR “WD: Fail Short Pulse” does NOT reoccur: Turn the machine off
and on several times, allowing 40 seconds in between, as the problem may be intermittent! If it
does not reoccur the new Power Logic Board fixed the problem.
2) IF “WD: Fail Long Pulse” OR “WD: Fail Short Pulse” REOCCURS:: Perform parts a THROUGH d
below:
a) Turn the machine OFF! The previous Power Logic Board is probably okay!
Parts b through d next page
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