Checking Internal Components - Canon ColorPASS-Z20e Service Manual

CHAPTER 5 TROUBLESHOOTING

1.4.2 Checking Internal Components

To check the internal components you must remove the top panel of the ColorPASS.
Before you remove the top and access panels of the ColorPASS, be aware
of the safety precautions you should take when handling the ColorPASS,
and use ESD precautions when handling printed circuit boards and elec-
tronic components. To review the safety precautions, see "Precautions" on
page -v.
Use the guidelines in Chapter 4 when disassembling, checking, and reassembling the
ColorPASS.
a. To Check Internal Coponents
1. Power off the ColorPASS (see "To shut down the ColorPASS" on page 4-4).
2. Remove the top panel and the access panel as described in "To open the ColorPASS" on
page 4-5.
3. Before you touch any components inside the ColorPASS, attach a grounding strap to
your wrist and discharge any static electricity on your body by touching the metal cover
of the ColorPASS.
4. Inspect the inside of the ColorPASS. For details, see "Checking ColorPASS internal
connections" on page 4-7.
Make sure no foreign materials have been dropped into the tray. F05-104-02 on page 5-
7 shows an exploded view of the system components.
• Look for obviously loose boards and reseat each board securely in its connector on
the motherboard.
• Look for cables that are obviously loose. Reseat each connector firmly.
• Make sure each connector is properly aligned with its mating connector. If the pins
are offset from each other, the board affected will not function properly.
5. Reassemble the ColorPASS and verify functionality (see "Restoring ColorPASS func-
tionality after service" on page 4-10).
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COPYRIGHT© 2000 CANON INC. 2000 2000 2000 ColorPASS-Z40e/Z20e REV.0 AUG. 2000