Action; Print Position - Canon QY8-1360-000 Service Manual

Part 5: Maintenance

6.2.2 Action

a) Error displays

1. Print Position

Correction Error
Buzzer: 8 times
ERROR indicator: Blinks twice
<Measure>
Visually check
carriage drive.
OK?
Yes
Reconnect power supply.
Check operation
of carriage drive.
OK?
Yes
Check home position
sensor.
OK?
Yes
Replace logic board.
• Faulty MPU
• Faulty PCB
soldering/conductivity
<Cause>
During initialization, the carriage print position is not
corrected. (The differential between the carriage travel
in each direction is outside the correction range.)
<Suspected parts>
• Check for paper jams, wear and tear and removal of carriage belt;
• Carriage with faulty idler pulley assembly operation;
• Carriage shaft distortion, scratches, insufficient lubrication, etc.
• Does the carriage move smoothly when moved manually?
See "4. 2. 2 Carriage unit" (page 5-4) for how to release the carriage lock.
No
Service or replace
faulty part.
• Does the carriage motor run during initialization?
• Is the carriage drive out of sync?
• Are there any problems in the carriage belt or idler pulley?
• Are there any abnormal noises?
No
A
Measuring point
IC1 (MPU)
Pin No. 28
• Check the measuring point while manually moving
the carriage with the power ON. (This is easier with
the sheet feeder removed.)
No
Check carriage cable
conductivity.
OK?
Yes
Replace carriage unit.
• Faulty carriage board.
5-16
Carriage unit, carriage belt,
carriage cable, carriage shaft,
guide rail, idler pulley, logic board
*: See "CAUTION" on page 1-14.
Sensor Normal value
Open Low level
Closed High level (sensing)
Measuring point
Carriage ribbon cable (28pin)
Pin Nos. 6 and 7
No
Replace carriage cable.
BJC-7100
7
28
6
1