Adjustments - - Ricoh FACSIMILE FAX77 Field Service Manual

After installing a new SBU, adjust the scanner. Perform each of the following procedures in sequence.
- TooIs Required -
• Scan line test chart and 8 line/mm test pattern - P/N H0539500
• Test lead -
• SBU adjustment knobs -
• Allen wrench
- Preparation -
1. Remove the top cover (see section 3-1-1).
2. Remove the SBU cover (2 screws). See the previous page.
3. Set the oscilloscope scale to 0.2 V/unit (vertical) and 0.5 ms/unit (horizontal).
4. Connect the oscilloscope probe to XVIDEO (pin 1 - blue wire) and the ground to GND (pin 4 - black wire)
on the test lead.
5. Clean the white pressure plate with a soft cloth and alcohol.
6. Light the xenon lamp (see page 2-24).
P/N H0419002
P/N H0539501
3-13