Troubleshooting 7 Blinks Failure (F5V/TPSC Resistance Check)
Disconnect the AC prior to making any disconnection or connection. Wait at least 2 minutes before the removal of any connector.
From before the previous page
Unplug SU41 and SD42. Using any of the
VFG Screws (Floating ground screws) as
ground, measure the resistance of pin 2 and
pin 6 of bothSU41 and SD42.
Using any of the VFG screws (Floating ground screws)
as ground, measure the resistance of pin 2 and pin 6 of
either SU41/SC41or SD42/SC42.
If a short circuit is found, proceed with step 2.
If no short circuit is found, isolate the SU and SD boards
as illustrated on the next slide.
1
2
Continue on the next page
Step
Step
A short circuit indicates the failure of the
board where it was found.
Note:
Change the SU and SD boars together
even if only one is found to be defective.
Slide 20
