Ricoh Aficio BP20N, Service Manual

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SET MALFUNCTIONS
G144/G145 4-20 SM
4.8 SET MALFUNCTIONS
4.8.1 ALL LEDS BLINK (FUSING ERROR)
Description: All LEDs on the operation panel blink.
Cause Solution
1. Thermostat, fusing power cable or heat
lamp circuit is open.
2. Defective thermostat.
3. Drive gear melted.
1. Replace the heat lamp or cable harness,
or replace the entire fusing unit if
necessary.
2. Examine the thermistor mounting. If there
is no heat damage, replace the
thermistor. Otherwise, replace the entire
fusing unit.
3. Replace the fusing unit.
4.8.2 ALL LEDS BLINK (SCAN ERROR)
Description: All LEDs on the operation panel blink.
Cause Solution
1. Defective LSU cable or faulty connector.
2. LSU motor is defective.
3. Check the HSYNC signal.
1. Replace the LSU.
2. Replace the main board. If the problem
persists, replace the LSU.
4.8.3 PAPER EMPTY
Description: The paper empty lamp remains on, with paper still remaining in the
paper feed cassette.
Cause Solution
1. Defective paper sensor actuator or faulty
sensor.
2. Defective PBA.
3. Defective cables or connectors.
1. Replace defective actuator or sensor.
2. Replace the main PBA.
4.8.4 PAPER EMPTY (WITHOUT INDICATION)
Description: The paper empty lamp does not light when the paper cassette is
empty.
Cause Solution
1. Defective paper sensor actuator or faulty
sensor.
2. Defective PBA.
3. Defective cables, connectors, or lamp.
1. Replace defective actuator.
2. Replace the main PBA.
3. Check and replace the cable harness, or
OPC if necessary.