Canon CXDI-50C, Service Manual

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4. Repair Guide
20
(2)After attaching the PCB-50LED, use a tester to measure the resistance value between the
sensor unit cover and the PCB-50LED through-hole. (Resistance value: 0.1 ohm or less)
[How to measure resistance value]
1) Touch the two probes together and check the indicated value. (Example: 0.2 ohm)
2) Measure the resistance value between the bottom of the screw hole (A in the
illustration) and through-hole on the PCB-50LED (B in the illustration).
Note: Probe must be firmly in contact with the bottom of the screw hole.
3) Check that the value on the tester is +0.1 ohm or less from the value measured in 1)
above. For example, if the value is 0.3 ohm or less (0.2 ohm + 0.1 ohm), it is
acceptable.
Note: The value on the test must be the same for more than two seconds. However, if the
value changes between two successive numbers, such as between 0.2 ohm and 0.3
ohm, it is acceptable.
5. Assembly
(1) Connect the FFC cable to PCB-50LED. (Handle the FFC cable carefully.)
(2) Connect the sensor cable. If the cable is new, use the cable attachment jig (BY9-6551).
Note: Refer to Service Manual Report CXDI-50G 05-001 for more information about
connecting the new cable.
(3) Attach the rear cover to the sensor unit.