Video Signal Checks; Line Connection Check; Others - Ricoh FAX07 Field Service Manual

7-4 VIDEO SIGNAL CHECKS

1. White Waveform Check
1 ) Position the white zone of the R21 test chart at the scan line.
Check the output waveforms at CN8-2 (Signal) and CN8-3 (GND) of the FCU for the following adjustment
procedures.
a) White level output
b) Flatness
c) Error bits
Refer to section 6-1 for details.
2) Position the 8-line/mm pattern of the R21 test chart at the scan line.
Check the output waveforms at CN8-2 and CN8-3 of the FCU for the following procedures.
a) Reduction rate
b) MTF (focusing)

7-5 LINE CONNECTION CHECK

Check:
1 ) Ground connection
2) Telephone and line connection

7-6 OTHERS

Check the supply of consumables on the user's premises.
7-2