Ccd Alignment - Panasonic UF-585 Service Manual

3.18 CCD Alignment

The CCD PC Board (337) is factory adjusted using special precision equipment and normally should not be replaced in the field. It
is recommended that the entire Scanner Block (321) be replaced. This will insure that the CCD PC Board (337) is aligned
properly.
If the CCD PC Board (337) is replaced, it can temporarily be aligned by following the procedure given below.
Note: The picture quality may not be the same as a unit that has been factory set.
• TOOLS REQUIRED
1. A 2 channel Oscilloscope
2. CCD Test Pattern
a copy can be made from the pattern shown in the Appendix. It must be reproduced to the same size as the sample
pattern in the Appendix (1:1 ratio).
• PROCEDURE
1. Remove Covers (see chapter 2).
2. Remove the Transmitter Unit with the Control Panel Assembly (see Section 2.4).
3. Position the CCD Test Pattern as follows.
a. Remove the Scanning Glass (308).
b. Using scotch tape, position the CCD Test Pattern on the Scanning Glass (308) as shown below. The CCD Test
Pattern must be faced down and centered on the Scanning Glass (308).
c. Set the Scanning Glass (308) with the CCD Test Pattern.
Aligh the edge
4. Connecting the Oscilloscope
• Carefully solder 2 probe wires to the components shown below on the SCA / SCB PC Board as shown below.
a. CN7 pin 4 (Trigger)
b. CN7 pin 8 (CCD out)
Oscilloscope
G
Frame Ground
Tape
Printed side
A
TRG CH1 CH2
CCD Test Pattern
CCD Test Pattern
2 A=B
SCA / SCB
CN7 - 4
CN7 - 8
90
Tape
Scanning glass
Scanning glass
B
CPU