Canon imageRUNNER ADVANCE C350 series Service Manual page 652

Error Detail
Location Item
code Code
E074 0000 05 Title Primary Transfer Roller disengagement control error
Detection Signal was not detected although the ITB Pressure Release
description Switch was turned ON/OFF for 6 times.
Remedy [Related parts]
- ITB Unit (Unit of replacement: INTER. TRANSFER BELT
ASS'Y)
- Harnesses from the DC Controller PCB to the ITB Pressure
Release Switch
1. DC Controller PCB (UN04/J162) to Relay Connector (2P)
(Unit of replacement: PROCESS CONTROL PCB ASS'Y)
2. Relay Connector (2P) to ITB Pressure Release Switch
(SW07/J6005)
- Harness between the DC Controller PCB (UN04/J140) and
the Primary Transfer Separation Solenoid (SL01/J5708) (Unit of
replacement: MAIN DRIVE ASSEMBLY)
- Fuse in the DC Controller PCB (UN04/FU07) (Unit of
replacement: DC CONTROLLER PCB ASSEMBLY)
- ITB Guide Rail (Unit of replacement: RAIL, I.T.B., FRONT/
RAIL, I.T.B., REAR)
- Main Drive Unit (Unit of replacement: MAIN DRIVE
ASSEMBLY)
- DC Controller PCB (UN04) (Unit of replacement: DC
CONTROLLER PCB ASSEMBLY)
[Points to note at work] When checking the harness/cable or
connector, perform the following work.
1. Disconnect and then connect the connector to check that
there is no bent pin and cable disconnection.
2. Visually check that the harness is not caught or open circuit.
3. If there is any error, replace the corresponding harness/cable.
7
Error•Jam•Alarm > Error Code > Error Code Details
Description
7 Error•Jam•Alarm > Error Code > Error Code Details
Error Detail
Location Item
code Code
Remedy [Remedy] Perform the following in the order while checking
whether the error is cleared.
1. Check that the ITB Unit is installed in the machine.
2. Replace the ITB Unit.
3. Check the harness between the DC Controller PCB and the
ITB Pressure Release Switch.
4. Check the harness between the DC Controller PCB and the
Primary Transfer Separation Solenoid.
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 ITB Guide Rail (Front/Rear).
2. Replace the Main Drive Unit.
3. Replace the DC Controller PCB.
b. If the measurement value is 1 ohm or higher (non
conduction state), replace the DC Controller PCB.
[Caution] After replacing the DC Controller PCB, measure the
resistance value between the Low-voltage Power Supply PCB
(UN01/J315/4-pin) and the DC Controller PCB (UN04/J20/1-
pin) using a tester before turning ON the main power to prevent
blowout of a fuse again. If the measurement value is 1 ohm or
higher (non conduction state), perform the following in the order
while checking whether the error is cleared.
1. Replace the harness between the DC Controller PCB and
the ITB Pressure Release Switch.
2. Replace the harness between the DC Controller PCB and
the Primary Transfer Separation Solenoid.
[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
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Description
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