Ricoh FT7770 Service Manual page 575

Service Call 14 -
o The charge, PCC, or TC/SC current is excessive.
Note: If TC/SC current is excessive (leak occurs), an LED on the TC/SC power pack turns on.
o Turn the main switch off.
o Clean the charge, PCC, and TC/SC (wires, endblock, and casing).
o Turn the main switch on.
If SC14 still lights:
o Turn the main switch off.
o Replace the corona wires and endblocks.
o Turn the main switch on.
If SC14 still lights:
o Turn the main switch off.
o Replace the C/PCC or TC/SC power pack.
o Turn the main switch on.
If SC14 still lights:
o Turn the main switch off.
o Replace the main board.
o Reinstall the old C/PCC or TC/SC power pack to double check whether
it is functional or not.
High Voltage Leak
13-51
30 April, '89