2FT-3.0
1-5-36
(13)
The bypass paper
feed solenoid does
not operate.
Broken bypass paper feed
solenoid coil.
Check for continuity across the coil. If none, replace the bypass
paper feed solenoid.
Poor contact in the bypass
paper feed solenoid con-
nector terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Defective engine PCB.
Run maintenance item U032 and check if YC8-5 on the engine
PCB goes low. If not, replace the engine PCB.
(14)
The drawer paper
feed clutch doesnot
operate.
Broken drawer paper feed-
clutch coil.
Check for continuity across the coil. If none, replace the drawer
paper feed clutch.
Poor contact in the drawer-
paper feed clutch connec-
torterminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Defective engine PCB.
Run maintenance item U032 and check if YC8-3 on the drawer
main PCB goes low. If not, replace the drawer main PCB.
(15)
The cleaning lamp
does not turn on.
Poor contact in the cleaning
lamp connector terminals.
Reinsert the connector. Also check for continuity within the con-
nectorcable. If none, remedy or replace the cable.
Defective cleaning lamp.
Check for continuity. If none, replace the cleaning lamp.
Defective engine PCB.
If the cleaning lamp turns on when YC3-12,13,14 on the engine
PCB is held low, replace the engine PCB.
(16)
The exposure lamp-
does not turn on.
Poor contact in the expo-
sure lamp connector termi-
nals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Defective inverter PCB.
Run maintenance item U061 and check if the exposure lamp turns
on with YC1-1 and YC1-6 on the inverter PCB go low. If not,
replace the inverter PCB.
Defective engine PCB.
Run maintenance item U061 and check if YC17-1 and YC17-6 on
the engine PCB goes low. If not, replace the engine PCB.
(17)
The exposure lamp-
does not turn off.
Defective inverter PCB.
If the exposure lamp does not turn off with YC1-1 and YC1-6 on
the inverter PCB high, replace the inverter PCB.
Defective engine PCB.
If YC17-1 and YC17-6 on the engine PCB are always low, replace
the engine PCB.
(18)
The fixing heater
does not turn on
(C6000).
Broken wire in fixing heater
M or S.
Check for continuity across each heater. If none, replace the
heater M or S.
Fixing thermostat triggered. Check for continuity across thermostat. If none, remove the cause
and replace the thermostat.
(19)
The fixing heater
does not turn off.
Broken fixing thermistor
wire.
Measure the resistance. If it is
∞
Ω
, replace the fixing thermistor.
Dirty sensor part of the fix-
ing thermistor.
Check visually and clean the thermistor sensor parts.
Problem
Causes
Check procedures/corrective measures
Summary of Contents for KM-2550
Page 1: ...SERVICE MANUAL Published in June 2005 842FT112 Version 3 0 KM 2550...
Page 4: ...This page is intentionally left blank...
Page 10: ...This page is intentionally left blank...
Page 123: ...2FT 1 1 4 56 This page is intentionally left blank...
Page 249: ...2FT 2 3 2 Figure 2 3 2 Power source PCB silk screen diagram 220 240 V AC 120 V AC...
Page 267: ...2FT 2 3 20 Figure 2 3 10 Operation unit PCB silk screen diagram...
Page 282: ......
