Lexmark T62X Service Manual page 79

4069-5XX/7XX
FRU
3 +5 V dc at the system
board test point
4 LVPS Fuse F1
5 LVPS Fuse F1 - continues
to blow F1 after LVPS
reinstalled.
Action
Check for +5 V dc at the +5V dc test
point on the system board. If correct,
replace the system board. If
incorrect, go to step 4.
Remove the LVPS from the printer
and check fuse F1. Replace the fuse
if the fuse is blown. If the fuse is not
blown go to step 6.
CAUTION: Before removing the
LVPS from the printer and checking
fuse F1, turn the LVPS off and
remove the AC line cord.
Replace fuse F1 if necessary. Turn
the LVPS off and pull the LVPS far
enough out of the printer to break
contact with the interconnect card
autoconnector. Connect the AC line
cord, turn the LVPS on. If fuse 1
blows again replace the LVPS
assembly. If the fuse does not blow,
turn the LVPS off, reinstall the LVPS
back into the printer and go to
step 7.
CAUTION: Before checking fuse F1,
turn the LVPS off and remove the AC
line cord.
Diagnostic Information
2-51