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31 August 1989
7.8 ADS Operation Checking
When:
Problem with ADS mode occurs.
Purpose:
To check if ADS controls development bias voltage properly
Target:
Darker original should increase the development bias voltage during
ADS operation.
ADS Voltage Checking
Measure:
Set SP 57
How:
ADS voltage is displayed on the guidance display ("V1"). Also, the
number "K", which is the actual ADS voltage divided by the reference
ADS voltage (fixed by SP 56), is displayed.
Development Bias Voltage Checking
Measure:
SP 59
The actual bias voltage is displayed on the guidance display ("V1").
How:
Also, the ID sensor pattern development bias is displayed ("V0").
1. Set the ADS reference voltage (SP 56).
2. If necessary, adjust the ADS voltage.
3. Place three sheets of A3/LDG white paper on the exposure glass, and set SP 57. Then,
press the Enter key and the Start key.
4. Write down the "V1" & "K" reading, and set SP 59. (First set ADS mode)
5. Repeat steps 3 through 5 using any original but white paper on the exposure glass, and
confirm that "V1" & "K" decrease in SP 57 and "V1" increases in SP 59.
7.9 Erase Adjustment
The leading erase margin is not within specifications.
When:
Purpose:
To maintain the correct leading erase margin
3.5 ± 2.5 mm
Target:
Measure:
SP 41 (0.6 mm/step, 15 steps) changes the erase lamp on period.
1. Place a 150 mm scale on the exposure glass and align it perpendicular to the left scale.
2. Adjust the leading edge erase margin using SP 41. Make three copies with each adjust-
ment.
5-56
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