2008T Troubleshooting Guide
P/N 490292 Rev. A
b) Per the Figure below, open the power supply. TWO (2) checks:
CHECK #1: Inspect the entire length of the 24V Power Harness. If burning or damage is
located this may be the problem!
CHECK #2: Inspect the surface of and all wires attached to the Power Control Board. If burning
or damage is located this may be the problem!
Figure 109 – Power Control Board / 24V Power Harness / IC4
c) Locate IC4 on the Power Control board..
d) IC4 (see Figure above) is socketed and can be removed without desoldering! CAUTION! Being
careful NOT to install it upside down swap in a known good IC4 chip BEFORE continuing to
procedure number WD- 1.0.4 (page 619).
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