Exposure Lamp Control - Minolta CF910 Service Manual

1154SBM0904A
9-4.

Exposure Lamp Control

• Exposure Lamp LA1 is turned ON and OFF by the Scan Start Timing signal (PRE-TRIG)
and Image Request signal (I-REQ) from Master Board PWB-I and the Lamp ON signal
(LMPON) and Sub-Scanning Area signal (VD) from IR Control Board PWB-C.
PRE-TRIG
I-REQ
LA1
LMPON
VD
When Power Switch S1 is turned ON, a misfeed or malfunction is reset, or the Door is
opened and closed:
S1 ON or
CPU reset
Scan
Scanner Drive
Stop
Motor (M1)
Return
ON
LA1
OFF
1. Automatically adjusts the CCD Sensor output voltage clamp value for black level.
2. Automatically adjusts the intensity of the exposure lamp.
3. Automatically adjusts the CCD Sensor output voltage gain for R, G, and B.
4. Makes a shading correction.
Control Signal
(PWB-I FC1 I-30B)
(PWB-I FC1 I-30A)
(PWB-C PJ15C-3)
Under the Shading Sheet
1 2
M-34
Wiring Diagram
3 4
16-G
16-G
26-B
1154T41MCB