Rep 4.23 Main Pwb Replacement - Challenge CMT-130TC Service Manual

REP 4.23 Main PWB Replacement

The following procedure outlines the steps nec-
essary to replace the main PWB. It is not nec-
essary to backup any machine-specific data
such as calibration data, jobs, machine settings,
etc. since there is no stored memory on the
main PWB. All of the machine's memory stor-
age is located on the console 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 machine.
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. Remove the two nuts that mount the high
voltage shield to standoffs on the electrical
panel (Figure 4-41).
4. Disconnect all cable connectors from the
main PWB.
5. Remove the six nuts that mount the PWB to
standoffs on the electrical panel (Figure
4-41).
6. Carefully remove the new PWB from the
electro-static bag that it was shipped in, and
place the old PWB in the empty bag.
4. Repair/Adjustment Procedures
7. Install the new PWB on the six standoffs on
the electrical panel, and attach it securely
with all six nuts.
8. Securely connect all cables to the new
PWB.
9. Reinstall the high voltage cover.
10. Reinstall the electrical panel door.
11. Restore power to the machine and switch
the main power ON.
12. Run a few test books through the trimmer to
make sure everything is working properly.
Figure 4-41. Main PWB
MAY 2019
4-28 CMT-130TC Book Trimmer