Warnings; Troubleshooting By Symptom - Canon MX7600 Service Manual

2-5. Warnings

Warning
Low ink
Print head temperature
rise
Protection of excess rise
of the print head
temperature

2-6. Troubleshooting by Symptom

Faulty operation
Message on the LCD
"!" is indicated for an applicable ink tank icon in
the Status Monitor.
If the print head temperature does not fall, the
print head error will occur.
If the print head temperature does not fall, the
print head error will occur.
Symptom
The power does not turn on.
The power turns off immediately after
power-on.
A strange noise occurs.
Nothing is displayed on the LCD.
A portion of the LCD is not displayed.
The display flickers.
Paper feed problems (multi-feeding,
skewed feeding, no feeding).
Carriage movement problems (contact
to other parts, strange noise).
No special solution.
Since the ink will be used up soon, prepare for a
new ink tank.
When the print head temperature falls, the error is
automatically cleared.
If the print head error is indicated, repair servicing
is required.
If the print head temperature exceeds the specified
limit, an intermission is inserted during printing.
- Confirm the connection of
- the power cord, and
- between the logic board and the power supply unit.
- Replace the
- power supply unit, or
- logic board.
- Remove foreign material.
- Attach a removed part if any.
- Check the operation of the moving parts (such as purge
unit, carriage unit, and paper feeding mechanism)
- Replace a faulty part, if any.
- Confirm the connection between the operation panel, the
LCD unit, and the logic board.
- Replace the
- operation panel unit, or
- logic board.
- Perform the button and LCD test in the service mode, and
confirm that the LCD is displayed without any segments
missing or flickering.
- Confirm the connection between the operation panel, the
scanning unit, and the harness.
- Replace the
- operation panel unit, or
- logic board.
- Examine the inside to confirm that no parts are damaged,
and the rollers are clean.
- Remove foreign material.
- Adjust the paper guide properly.
- Set the paper properly.
- Confirm the following:
- selected paper source
- attachment of the rear cover
- connection of each harness and the logic board
- sheet feeder unit operation
- Replace the
- sheet feeder unit,
- cassette unit, or
- logic board.
- Confirm that the carriage timing slit strip film is free from
damage or grease.
14 / 65
Solution
Solution