Checking The Alignment Of The Ccd Board - Xerox Document FaxCentre 165c Service Manual

3) Connect the probe of channel CH1 of the oscilloscope to the test point " VIDEO", the
probe of channel CH2 to test point "RS", the ground wires of the probes to test points
"GND" and the probe of the external trigger to test point "SH" (see figure 6-7)
additional
flat cable
4) Set the oscilloscope as follows:
- CH1 = 1V/ division
5) Power on the facsimile machine and then, with the START key held down, press
the * key twice in quick succession to gain direct access to the SYSTEM TEST
utilities (see section 6.1)
6) Press the < key to select SCANNER SHADING and press the START key: the LED
array will light up so that the CCD adjustment can be made.

6.3.2 Checking the Alignment of the CCD Board

1) Tilt the console forward, remove the document ejector roller (see section 7.2.11)
and insert the jig in its place with its printed side facing the optical reader glass, and
then close the console again.
The jig consists of several different areas (see figure 6-8)
C E
6-14
Fig. 6-7
- CH2 = 2V/ division
A D B D
Fig. 6-8
XEROX DFC165 & DWC165c Service Manual
CCD board
flat cable
E
A C