Machine Errorxx (Xx Indicates The Error Code Number) - Ricoh G157 Service Manual

ERROR INDICATION

MACHINE ERRORxx (xx indicates the error code number)

Error
Symptom
Code
20 Laser power error
21 Beam detector error
22 NVRAM error
23 Engine controller
hardware error
24 Process timing clock
error
25
Development motor
error
26 Main motor error
27 Scanner motor error
28 Charge HV unit error
29 LVPS error
2A Fusing thermistor
error
2B Fusing lamp error
2C Fusing temperature
low error at warming
2D Fuser temperature
low error
G157
CÓPIA NÃO CONTROLADA
Possible Cause
Connector LCN3 is not
properly connected.
Laser unit defective
BCU board defective
Connector PCDN is not
properly connected.
Laser unit defective
BCU board defective
BCU defective
Control error
BCU defective
Main motor defective
BCU defective
Toner cartridge gear
defective
Development gear unit
defective
Development motor defective
BCU board defective
Main motor defective
BCU board defective
Connector PCDN is not
properly connected.
Laser unit defective
BCU or controller board
defective
HV power supply defective
BCU board defective
Direct current unit defective
Fusing thermistor defective
BCU board defective
Defective fusing lamp
ON/OFF circuit
Defective temperature control
circuit
Contact failure of harness
connector
Low input voltage
Low input voltage
4-4
CÓPIA NÃO CONTROLADA
Countermeasure
Connect the connector
properly.
Replace the laser unit.
Replace the BCU board.
Connect the connector
properly.
Replace the laser unit.
Replace the BCU board.
Replace the BC. If the
problem remains,
replace the controller.
Turn the main power
switch off and on.
Replace the BCU board.
Replace the main motor.
Replace the BCU board.
Replace the toner
cartridge.
Replace the
development gear unit.
Replace the
development motor.
Replace the BCU board.
Replace the main motor.
Replace the BCU board.
Connect the connector
properly.
Replace the laser unit.
Replace the BCU and/or
controller board.
Replace the high-voltage
power supply PCB.
Replace the BCU board.
Replace the direct
current unit PCB.
Replace the fusing unit.
Replace the BCU board.
Replace the direct
current unit PCB.
Replace the BCU board.
Check the connection of
the harness connector.
Connect the machine to
the rated voltage source.
Connect the machine to
the rated voltage source.
SM