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XEROX DFC165 & DWC165c Service Manual
J14
6.3
ADJUSTING THE CCD
This adjustment
MUST
be performed,
exclusively in a laboratory,
after replacing
the CCD board, and requires the following equipment:
1. a special jig (order code 98870 H)
2. a flat cable like the one that connects the CCD board to the motherboard
3. a plate with test points, which may be prepared at the laboratory, bearing in mind
that the test point signals must correspond to the following pins of connector
J14
on the motherboard: RS =8, SH = 13, VIDEO = 10, GND = 4-9-11
4. an oscilloscope with a memory to function as an "event counter"
5. a sample facsimile machine of the same class as the machine to be repaired.
6.3.1 Preparing for the CCD Adjustment
Before proceeding to adjust the CCD, the sample facsimile machine must be
prepared and connected to the scanner unit on which the CCD board has been
replaced.
1) Disconnect the CCD flat cable from connector J8 on the motherboard and plug
in one end of the additional flat cable in its place (see figure 6-6)
2) Plug the other end of the additional flat cable into one connector of the test point
plate and then the replaced CCD board flat cable into the remaining connector on
the plate (see figure 6-6)
Fig. 6-6
CCD plate
flat cable
test point plate
additional
flat cable
connector J8
