Troubleshooting By Errors; Ram Error - Canon BJC-820 Service Manual

BJC-8200

1.3 Troubleshooting by Errors

1. ROM Error

2. RAM Error

3. EEPROM
Error
4. Other
Hardware
Error
CAUTION
5. Temperature
Sensor Error
<Cause>
<Suspected parts>
<Measure>
<Cause>
<Suspected parts>
<Measure>
<Cause>
<Suspected parts>
<Measure>
<Cause>
<Suspected parts>
<Measure>
Error indications may fail if error occurs with ROM, RAM, or other
hardware.
<Cause>
<Suspected parts>
<Measure>
ROM cannot be read during initialization.
Control ROM
Replace ROM and logic board.
RAM cannot be read or written.
ASIC
Replace ASIC and logic board.
EEPROM cannot be written correctly.
EEPROM, CPU
Replace EEPROM, CPU, and logic board.
Internal processing on logic board is not performed
correctly.
EEPROM, CPU
Replace CPU, ASIC, and logic board.
The thermistor is defective.
Thermistor
Replace the logic board.
4-5
Part 4: TROUBLESHOOTING