Kyocera FS-6950DN Service Manual page 61

Problem
(6) Broken power cord.
Defective message
The power cord is not
displaying (LCD) [2].
plugged in properly.
No message appears
on the message dis-
No electricity at the AC
play (LCD), even
power outlet.
thought the mes-
Defective power source
sage background
unit.
does not illuminate
faintly. (The power is
Defective harness between
not supplied to the
operation panel PWB (YC1)
operation panel
and main PWB (YC13), or
PWB.)
improper connector inser-
tion.
Defective operation panel
PWB.
Defective main PWB (sys-
tem DIMM PWB).
(7) Defective fuser unit's
"Close rear unit" dis- drawer connector.
play is not cancelled
to closing the rear
unit.
Defective harness between
engine PWB (YC6) and
fuser drawer connector, or
improper connector inser-
tion.
Defective engine PWB.
(8) Deformed interlock switch
"Close top cover" dis- 1's actuator lever.
play is not cancelled
Defective power source
to closing the top
unit.
cover.
Defective engine PWB.
(9) Deformed interlock switch
"Close left side 2's actuator lever.
cover" display is not
Defective harness between
cancelled to closing
interlock switch 2 and con-
the left side cover.
nect-L PWB (YC12), or
improper connector inser-
tion.
Defective interlock switch 2. Replace the interlock switch 2.
Defective engine PWB.
Causes
Replace the power cord.
Check the contact between the printer's AC inlet and the AC
power outlet.
Measure the AC input voltage.
Replace the power source unit (See page P.1-5-28).
Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the harness.
Replace the operation panel PWB.
Replace the main PWB [system DIMM PWB] (See page P.1-5-26).
If a fuser unit which is known to work normally is available for
check, replace the current fuser unit in the printer with the normal
one. If the symptom disappears, replace the fuser unit with a new
one.
Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the harness.
Replace the engine PWB (See page P.1-5-22).
Check the bending of the actuator lever of the interlock switch 1, if
there is trouble, remedy or replace.
Replace the power source unit (See page P.1-5-28).
Replace the engine PWB (See page P.1-5-22).
Check the bending of the actuator lever of the interlock switch 2, if
there is trouble, remedy or replace.
Reinsert the connector. Also check for continuity within the con-
nector harness. If none, remedy or replace the harness.
Replace the engine PWB (See page P.1-5-22).
Check procedures/corrective measures
2F7
1-4-15