Ads Voltage Adjustment - Ricoh FT5580 Service Manual

12 June 1987

7. ADS Voltage Adjustment

When
Purpose
Target
Measure
How
1. Clean the optics, and select ADS mode. Then, set SP 56.
Place three sheets of A3/LDG white paper on the exposure glass,
2.
and press the Enter key.
3. Open the rear cover (2 screws) and adjust the ADS sensor output
voltage using VR 100 on the main PCB.
ADS voltage is not within specifications (from 2.6 to
3.1 volts).
A f t e r r e p l a c e m e n t o f e i t h e r e x p o s u r e l a m p , a c d r i v e
PCB, main PCB or ADS sensor.
After "Light Intensity Adjustment"
To maintain correct ADS mode operation.
ADS voltage = 3.0 + 0.1, - 0.4
Voltage Adjustment = VR 100 on the main PCB
Set SP 56
T h e A D S o u t p u t v o l t a g e o n t h e m a i n P C B c a n b e
changed.
The ADS voltage is displayed on the guidance display
("V0").
3-48