A SERVICE OF

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2-50 Service Manual
5021-0XX
8 Disconnect cable from
DCN13 on I/O board.
Check the following on
disconnected cable
connector:
Pin 1 to pin 224VDC
Pin 9 to pin 125VDC
Are voltages present?
Replace I/O
board. See I/O
board removal
on page 4-70.
Go step 10.
Replace cable
that connects
ACN1 on LVPS
to DCN13 on I/O
board. Remove
RIP board cage
to gain access to
cable. See RIP
board cage
removal on
page 4-57. Go
to step 9.
9 Reassemble and retest
printer. Does error clear?
Problem solved. Go to step 10.
10 Check cable that connects
engine controller board
connector I2CN to I/O
board connector DCN3 for
continuity and pin shorts. Is
cable okay?
Replace engine
controller board.
See Engine
controller
board removal
on page 4-55.
Replace cable.
Step Questions / actions Yes No