Light Intensity Adjustment; Setting Ads Reference Voltage - Ricoh FT5580 Service Manual

5. Light Intensity Adjustment

When
Purpose
Target
Measure
How
1. Clean the optics, the ID sensor, and the charge corona wires.
2. Check/adjust uneven exposure and horizontal magnification.
3. Select the fourth manual ID level and make ten A3/LDG copies to
stabilize drum sensitivity.
4. Select the second manual ID level and make three A3 copies.
5. Adjust the light intensity using SP 48.

6. Setting ADS Reference Voltage

When
Purpose
Target
Measure
How
T h i s p r o c e s s e n a b l e s a s p e e d u p o f i m a g e a d j u s t m e n t s a s t h e r e a r
cover does not have to be removed to adjust the ADS voltage.
1. Clean the optics, and select ADS mode. Then, set SP 56.
2. Place three sheets of A3/LDG white paper on the exposure glass,
and press the Enter key.
3. Check if the ADS voltage "V0" is within specifications (from 2.6 to
3.1 volts).
4. If it is not within specifications, perform "ADS Voltage Adjustment."
: Every call
: To maintain the correct light intensity.
: S e c o n d l e v e l o f t h e s t a n d a r d t e s t c h a r t s h o u l d b e
slightly visible or there is no background on the copy
w h e n t h e s e c o n d l e v e l o f t h e d e n s i t y c o n t r o l i s
selected.
: Adjust SP 48
: The lamp regulator output voltage is changed.
: Every call
: To maintain correct ADS mode operation.
: ADS voltage = from 2.6 to 3.1 volts
: Set SP 56
: Main CPU automatically stores the reference voltage
d i s p l a y e d ( " V 0 " ) d u r i n g S P 5 6 o p e r a t i o n . T h e A D S
v o l t a g e i s d i s p l a y e d i n t h e g u i d a n c e d i s p l a y ( " V 0 " ) .
(Setting this voltage is only valid when ADS voltage is
from 2.6 to 3.1 volts.)
3-47
12 June 1987