Canon imageRUNNER ADVANCE C255 Series, Service Manual, Page: 415 / 987

E197-2F00-05 Communication error
Detection Description Although access to KONA3 (ASIC) in the Cassette Module Controller PCB from the DC Controller
PCB (CPU) was performed, no response was received and timeout occurred.
Remedy
[Related parts] R1.00
- Harnesses connecting the DC Controller PCB (UN04/J190), the Drawer Unit (DR03/J5904) and
the Cassette Module Controller PCB
- Fuse in the DC Controller PCB (UN04/FU19)
- Cassette Module Controller PCB
- DC Controller PCB (UN04)
[Remedy] Perform the following in the order while checking whether the error is cleared.
1. Turn OFF and then ON the main power, and check whether the error is cleared.
2. Check the harness between the DC Controller PCB and the cassette unit drawer on the host
machine side.
3. Visually check if the cassette unit drawer on the host machine side and the drawer on the
cassette unit side are damaged or if there is any bent pin. If so, replace the drawer.
4. Check the harness between the drawer on the cassette unit side and the Cassette Module
Controller PCB.
5. Measure the both ends of the fuse in the DC Controller PCB using a tester.
a. If the measurement value is less than 1 ohm (conduction state),
1. Replace the Cassette Module Controller PCB.
2. Replace the DC Controller PCB.
b. If the measurement value is 1 ohm or higher (non conduction state), replace the DC Controller
PCB.
[Reference] Before replacing the DC Controller PCB, back up the service mode data (approx. 2
min) and restore the backup data after the replacement so the data may be able to be protected.
- Backup: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMBUP
- Restoration: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMRES
E202-0001-04 Scanner Unit HP error
Detection Description The HP of the Scanner Unit could not be detected when starting scanning operation.
Remedy [Related parts] R1.00
- Harness between the CIS HP Sensor (J4205) and the Main Controller PCB (UN81/J4005)
- Harness between the Reader Motor (J4305) and the Main Controller PCB (UN81/J4005)
- Harness between the Main Controller PCB (UN81/J4509) and the Low-voltage Power Supply
PCB (UN01/J313)
- CIS HP Sensor
- Reader Motor
- Low-voltage Power Supply PCB (UN01)
- Reader Assembly
- Main Controller PCB (UN81)
[Remedy] Perform the following in the order while checking whether the error is cleared.
1. At initial operation of the Reader startup after the main power is turned ON, check if the Reader
Motor operates (whether the Scanner Unit moves or operation sound is heard). If it operates, check
whether load on the Timing Belt for moving CIS is appropriate.
a. If it is appropriate, replace the CIS HP Sensor.
b. If it is not appropriate (overloaded), check/replace the Timing Belt, Drive Gear and pulley.
2. Check/replace the CIS Holder (soiling or damage on the surface).
3. Check/replace the related harness/cable, connector and parts.
7. Error/Jam/Alarm
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