Rep 4.25 Di/Hs Pwb Replacement - Challenge CMT-130TC Service Manual

REP 4.25 DI/HS PWB Replacement

The following procedure outlines the steps nec-
essary to replace the DI/HS PWB.
CAUTION
Observe standard ESD protection procedures
while replacing any PWB's. Damage may result
due to static discharge.
Procedure
1. Switch the main power OFF and lockout
power to the trimmer.
WARNING
Disconnect and lockout power as described
in the Power Lockout Procedure on page ix.
2. Remove the electrical panel door at the
lower right side of the trimmer.
3. Disconnect all cable connectors from the
DI/HS PWB.
4. Remove the four nuts that mount the PWB
to standoffs on the electrical panel (Figure
4-43).
5. Carefully remove the new PWB from the
electro-static bag that it was shipped in, and
place the old PWB in the empty bag.
6. Install the new PWB on the four standoffs on
the electrical panel, and attach it securely
with all four nuts.
7. Securely connect all cables to the new
PWB.
8. Reinstall the electrical panel door/cover.
9. Restore power to the trimmer and switch the
main power ON.
4. Repair/Adjustment Procedures
10. Run a few test books through the trimmer to
make sure everything is working properly.
Figure 4-43. DI/HS PWB
MAY 2019
4-30 CMT-130TC Book Trimmer