Ricoh VT3500, Service Manual

Page: 243 / 330

3. OPTICS SECTION
3.1 OVER VIEW
Double check all optical component adjustments, because these adjustments
influence each other.
The following table shows the reciprocal relationship between adjustment
procedures. The "O" indicates those items that must be checked (check
items) after an item in the left column (adjustment item) is adjusted.
Check Item
Output of
White
Level
Shading
Scan Line
Position
Reading Start
Position of
Main Scan
Focus
(MTF)
Reduction
Ratio
(Moire)
Adjustment
Item
Output of
White Level
Shading
O
Scan Line
Position
O O O
Reading
Start Position
of Main Scan
O O O
Focus (MTF)
O
Reduction
Ratio (Moire)
O O O O O
* Necessary Tools
1) Facsimile Test Chart R-21 (P/N 99992131)
2) Resolution Chart (P/N A0129110)
3)
Oscilloscope
1 December 1993
5-9