Optics Adjustment; Preparation For Adjustment - Ricoh C211 Service Manual

1. OPTICS ADJUSTMENT

The method of the optics adjustment is the same as the VT2000 series.
However, the wave shape is not exactly same because the pixel density of
VT2105 is different from that of the VT2000 series.
Necessary Tools
1) Facsimile Text Chart R-21
2) Resolution Chart
3) Oscilloscope
1.1

PREPARATION FOR ADJUSTMENT

1. Remove the original table and the original table cover.
2. Connect the terminals of the oscilloscope to the following test pins on
the A/D conversion board.
3. Access "I/O Check Mode".
•
Turn on the main switch while holding the Print Start key, Stop key
and Clear key on the operation panel. ------ LT version
•
Turn on the main switch while holding the Print Start key, Stop key,
Clear key and the full master detection switch. ------ A4 version
4. Set "15" in the copy counter using the number keys, and set "0" in the
memory/class display by pressing the memory/class key
5. Press the Print Start key to turn on the fluorescent lamp.
C216
(99992131)
(A0129110)
Oscilloscope
Channel 1
Channel 2 (Black level
standard voltage)
GND
5-2
Text Pin
TP603
TP604
TP600
SM