Lexmark X746de - Page 89

Diagnostic information 2-49
7526
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2
1. Remove the fuser. See “Fuser assembly
removal” on page 4-104.
2. Check the fuser AC autoconnect cable for
damage, check the other end of the cable
for damaged pins.
3. Check the fuser DC autoconnect cable for
damaged pins.
Are the connectors damaged?
Replace the appropriate
cable (either the fuser AC
or the fuser DC cable). See
“Fuser AC cable
removal” on page 4-105
or “Fuser DC cable
removal” on page 4-107.
Go to step 3
3
Replace the fuser. See “Fuser assembly
removal” on page 4-104.
Did the error clear?
Problem resolved. Go to step 4.
4
1. Remove the rear frame cover. See “Rear
frame cover removal” on page 4-37.
2. Check the cable in connector JFUSER1
(fuser DC cable) for proper connection to
the system board. the cable for pinch
points, and the cable or connector for any
other damage.
Is the cable damaged?
Replace the fuser DC
cable. See “Fuser DC
cable removal” on
page 4-107.
Go to step 5.
5
Check the cable in connector JLVPS2 for
proper connection to the system board, the
cable for pinch points, and the cable or
connector for any other damage.
Is the cable damaged?
Replace the LVPS. See
“Low-voltage power
supply (LVPS) removal”
on page 4-115.
Go to step 6.
6
Measure the continuity across all of the fuses
on the system board.
Are any of the fuses blown?
Replace the system board.
See “System board
removal” on page 4-157.
Go to step 7.
Step Questions / actions Yes No
Fuser autoconnects
DC autoconnect
AC autoconnect
On printer