Troubleshooting By Symptoms - Canon BJC-820 Service Manual

Part 4: TROUBLESHOOTING

2. TROUBLESHOOTING BY SYMPTOMS

2.1 Troubleshooting by Symptoms
1. Power Does
Not Turn On
Check if AC adapter
outputs +5 Vdc
OK?
Yes
1. Replace the logic
board
2. Replace the DC cable
<Symptoms>
Pressing the POWER button fails to switch on
the printer.
Pressing the POWER button does not start
initialization.
<Cause>
Defective AC adapter, logic board, or DC cable
+5 Vdc
GND
No
Replace the AC adapter
4-14
BJC-8200