2-96 Service Manual
5021-0XX
6 Remove paper tray, fill with
paper and reinsert. Check
voltage level on DCN16 pin
8. Is 0 VDC present?
Replace I/O
board. See “I/O
board removal”
on page 4-70. If
problem
persists, replace
engine controller
board. See
“Engine
controller
board removal”
on page 4-55.
Replace paper
guide (C)
assembly . See
“Paper guide
(C) assembly
removal” on
page 4-47.
7 Turn printer off. Remove
paper guide (C) assembly.
See “Paper guide (C)
assembly removal” on
page 4-47. Check cable for
continuity that connects
DCN16 pins 7, 8, and 9 to
paper empty sensor. Also
check for shorted pins. Is
cable okay?
Replace paper
guide (C)
assembly . See
“Paper guide
(C) assembly
removal” on
page 4-47.
Replace cable.
8 Touch positive lead to
DCN13 pin 9 and pin 11 to
ensure 5 VDC is being
supplied to I/O board. Is 5
VDC present?
Replace I/O
board. See “I/O
board removal”
on page 4-70.
Go to step 9.
9 Check cable continuity
between LVPS ACN1 and I/
O board DCN13. Also
check for shorted pins. Is
cable okay?
Replace LVPS.
See “Low
voltage power
supply (LVPS)
with cage
removal” on
page 4-60.
Replace cable.
Step Questions / actions Yes No
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