Canon iPF9000S Troubleshooting Manual page 116

24. Operational Failures ②
power turns off automatically (without an error occurring)
Electrical faults
Faulty printhead
Cause
The main unit won't turn on, or the main unit starts but the power turns off
C1
automatically.
C2 Start the main unit with the head being removed.
Flow 1
Check for cable contact between the operation panel PCB
and the main controller
Is 5V power available to the operation panel? (See below)
Other than the
iPF5000 Series
Check 5 V appear on pin 12 of
main controller J1801
Abnormal
■Operation panel supply voltage check points
Model
iPF5000 Series
Other than iPF5000 Series
Troubleshooting Guide
Faulty operation panel (and cable)
C1
Faulty PCB (and cable)
Faulty main controller (and cable)
C2 Faulty printhead
Point to check
No
iPF5000 Series
Is the main controller
green LED on?
On
Normal
Replace the operation
panel cable
Replace the power PCB
Measurement point Voltage
J1 pin 11
＋5V
J101 pin 11
The main unit won't start or the
Replace the operation panel
Yes
Check 26 V appear on pin 9
of main controller J1801
Off
Replace the operation
panel cable
Replace the main controller
Operation panel PCB
J1 pin 11 on iPF5000 Series
3-42
Flow 1
Replace the head.
Replace the power
PCB
Abnormal
Normal
Replace the main
controller
Action