Canon imageRUNNER ADVANCE 9070 PRO series Service Manual Digest page 97

E Detailed Occurance Items
code code area
E270 -0002 -04 Title Failure of the horizontal/vertical direction synchronization
signal
Description The vertical direction synchronization signal (VSYNC)
of detection was not sent due to a failure of the horizontal direction
synchronization signal (HSYNC), and an image failure
occurred or the operation stopped in failure.
Measures 1. Displacement/disconnection of the connector of the
optical unit (reader/DADF)
2. Displacement/disconnection of the connector of the
reader controller PCB (PCB1)
3. Failure of the optical unit (reader/DADF)
4. Failure of the reader controller PCB
E270 -0101 -04 Title Failure of the backside vertical scanning direction
synchronization signal
Description The vertical direction synchronization signal (VSYNC)
of detection was not sent from the CMOS PCB (backside optical unit)
correctly, and an image failure occurred or the operation
stopped in failure.
Measures 1. Displacement/disconnection of the connector of the
optical unit (DADF)
2. Displacement/disconnection of the connector of the
reader controller PCB (PCB1)
3. Failure of the optical unit (DADF)
4. Failure of the reader controller PCB
E280 -0001 -04 Title Failure of communication between the reader controller
PCB (PCB1) and the optical unit (reader)
Description Communication does not start between the reader
of detection controller PCB and the front side optical unit within a
specified period.
Measures 1. Displacement/disconnection of the connector of the
optical unit (reader)
2. Displacement/disconnection of the connector of the
reader controller PCB (PCB1)
3. Failure of the optical unit (reader)
4. Failure of the reader controller PCB
E280 -0101 -04 Title Failure of communication between the reader controller
PCB and the optical unit (DADF)
Description Communication does not start between the reader
of detection controller PCB (PCB1) and the backside optical unit
within a specified period.
Measures 1. Displacement/disconnection of the connector of the
optical unit (DADF)
2. Displacement/disconnection of the connector of the
reader controller PCB (PCB1)
3. Failure of the optical unit (DADF)
4. Failure of the reader controller PCB
Description
T-3-8
3
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