Checking Internal Connections; To Check Board And Cable Connections - Canon FY8-13HW-000 Service Manual

3 Checking internal connections

The most common causes of hardware problems are faulty and loose connections. Before
you conclude that any board or component has failed, remove, inspect, and reseat all appro-
priate connections, and then check whether the problem still occurs.

3.1 TO CHECK BOARD AND CABLE CONNECTIONS

Follow standard ESD precautions while working on internal components.
1. Make sure you have powered off the iR-M2 (see page 4-3), removed all the cables from
the back panel, and removed the side panel and access panels (see page 4-4).
2. Position the iR-M2 so it is resting on its side and the internal components are facing up.
3. Inspect the boards to make sure they are firmly seated in their motherboard connectors.
Press down firmly on the boards to make sure each one is securely installed.
The standard board configuration includes the following (from top to bottom):
Connector PCI1—Copier interface board
Connector PCI2—Empty (reserved for Token Ring option)
Connector PCI3—Empty (reserved for parallel–in option)
Connector PCI4—Empty
Connector PCI5— Empty
Connector PCI6— Not used
4. Inspect ribbon cables to see if they are intact.
5. Make sure that all ribbon cables and power cables are seated properly on connectors (see
F04-301-01 on page 4-10 and F04-301-02 on page 4-11).
Cable connectors are keyed to fit only when properly oriented.
6. Check the front and back panel fan cables and the CPU fan cable connections to the
motherboard.
Gently straighten any bent pins with a pair of needlenose pliers. If, after tightening the
connections, you are still experiencing problems, it may be that one or more compo-
nents are still not getting power. If this is the case, see "Checking voltages" on page 4-
39.
COPYRIGHT © 2002 CANON INC. 2000 2000 2000 2000 NM-PDL REV.0 JULY 2002
CHAPTER 4 SERVICE PROCEDURE
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