Canon MP638 Service Manual page 10

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8 times
Print head
temperature rise
error
9 times
EEPROM error
10 times
VH monitor error
11 times
Carriage lift
mechanism error
12 times
APP position error
14 times
APP sensor error
Paper feed cam
sensor error
15 times
USB Host VBUS
overcurrent
16 times
Pump roller sensor
error
17 times
Paper eject encoder
error
19 times
Ink tank position
sensor error
(Japan).
[5200] The print head temperature exceeded
the specified value.
[6800,
A problem occurred in reading from
6B01]
or writing to the EEPROM.
[B200] The internal temperature exceeded
the specified value.
[5110] The carriage did not move up or
down properly.
[6A80] An error occurred in the APP motor.
[6A90] An error occurred during paper
feeding or paper ejection.
[6B10] An error occurred in the paper feed
cam sensor during paper feeding
from the cassette, or the paper
absorbing a large amount of ink
jammed in the PF rear guide.
[9000] The USB Host VBUS is overloaded. (1) Part replacement:
[5C20] The pump roller position cannot be
detected.
[6010] An error occurred in the paper eject
encoder signal.
[6502] None of the ink tank position is
detected.
8 / 45
(1) Print head condition
(2) Cable connection
(3) Part replacement:
- Print head
- Logic board
(1) Part replacement:
- Logic board
(1) Part replacement:
- Print head and logic board (Replace them at
the same time.)
- Power supply unit
(1) Foreign material or paper debris that
obstructs the carriage movement;
remove foreign material.
(2) Part replacement:
- Switch system unit
- Carriage unit
(1) Foreign material or paper debris around the
purge drive system unit;
remove foreign material.
(2) Foreign material or paper debris around the
ASF unit;
remove foreign material.
(3) Cable connection
(4) Part replacement:
- Purge drive system unit
- Logic board
(1) Jammed paper in the PF rear guide (when a
large amount of ink was absorbed in the
paper);
remove the jammed paper and foreign
material.
(2) Foreign material or paper debris in the
cassette or in the PF rear guide;
remove foreign material.
(3) Part replacement:
- PF pick-up unit
- Logic board
- Logic board
(1) Cable connection
(2) Part replacement:
- Purge drive system unit
(1) Smearing or scratches on the LF / EJ slit film;
clean the LF / EJ slit film.
(2) Foreign material or paper debris in the paper
path;
remove foreign material.
(3) Cable connection
(4) Part replacement:
- LF / EJ slit film
- LF / EJ timing sensor unit
- Platen unit
- Logic board
- Paper feed motor
(1) Ink tank position;
confirm the ink tank position.
(2) Re-set or replacement of ink tanks
(3) Cable connection
(4) Part replacement:

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