∗
Necessary condition
1) The scanner section must be clean.
∗
Job content
1) Put an oscilloscope between the check point JP2 (VIN) on the MCU (PCU) PWB and GND.
At that time, trigger with the SH (JP3) signal to see the waveform correctly.
JP2 (VIN)
JP3 (SH)
JP1 (GND)
2) Execute simulation 63-1. (The copy lamp lights up in the scanner
unit home position.)
3) Turn and adjust the volume on the copy lamp drive PWB so that
the CCD output waveform max. value is 4.0
±
0.1 V.
∗
Trouble caused y improper operation
1) E7 (05) trouble
2) E7 (04) trouble
3) E7 (12) trouble
4) E7 (15) trouble
5) Copy exposure cannot be adjusted.
6) Copy exposure abnormality
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Preliminary work
JOB No
Content
S 004
Scanner (reading) section cleaning
∗
After-work
JOB No
Content
ADJ M1
Copy exposure adjustment
∗
Necessary tools
Name
Oscilloscope
Parts code/Price rank
—
4.0±0.1V
FO-3800M
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