3 December 2004
LED FUNCTION MODE
4-3
Trouble-
shooting
4.1.3 SELF DIAGNOSTIC MODE
This is done only when you turn on the main power of the machine. (
☛
4.1.1)
First turn off and on the main power when an error occurs. If an error remains after
doing that, do the actions in the column of “possible cause”.
Descriptions
Conditions Symptoms
Possible
cause
When turning on.
The HP sensor does not
detect the scanner optics
unit.
When scanning.
HP sensor error
The difference between the
scanner motor pulse in
scanning an original and
the one in returning to
home position is more than
15 mm.
•
Locked scanner optics unit
•
Defective HP sensor
•
Defective motor
•
Defective scanner timing belt
tension
•
Defective harness
1. Check the carriage lock switch.
(
☛
3.2.11)
2. Replace the HP sensor.
3. Replace the scanner optics unit
motor.
4. Check the scanner timing belt
tension.
5. Check or replace the harness.
Checking the ASIC for the
CCD is not done correctly..
CCD ASIC error
The DMA has no capacity for
storing the scanning data.
•
Defective FFC
•
Defective SBU
•
Defective CCD board
•
Defective MCB
1. Check or replace the FFC.
2. Replace the scanner optics unit.
3. Replace the MCB.
EEPROM error
The “BUSY” is flagged over
250 ms after writing to the
EEROM.
•
Defective MCB
1. Replace the MCB
Gain/ Offset adjustment
initialization error
The input level is less than
10 bit when doing the “Gain
adjustment”.
The input level is less than
10 bit when doing the “Off-
set adjustment”.
•
Defective exposure lamp
•
Defective SBU
•
Defective MCB
1. Replace the exposure lamp.
2. Replace the scanner optics unit.
3. Replace the MCB.
Memory error
A mismatching between the
scanning data and writing
data to the memory happens.
•
Defective MCB
1. Replace the MCB.
4.1.4 BLOWN FUSE CONDITIONS
Rating
Fuse
100-250 V
Symptom when turning on the main
switch
Power supply unit
FS1
2.5 A / 250 V
No response
