Canon imageRUNNER ADVANCE C5255, Руководство по обслуживанию, Страница: 671 / 1443

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Troubleshooting > Controller Self Diagnosis > Operation Check of the Main Controller LEDs > Checking the lighting of the LED4 RED on the Main Controller 2
Troubleshooting > Controller Self Diagnosis > Operation Check of the Main Controller LEDs > Checking the lighting of the LED4 RED on the Main Controller 2
Operation Check of the Main Controller LEDs
You may be able to determine the remedies against Main Controller-related troubles by
checking the lighting status of LEDs on the PCB.
■
Location of LEDs
LED9 Green
LED16 Green
LED1 Green
LED 4 Red
Main Controller PCB 1
Main Controller PCB 2 Riser PCB
■ ■ Preconditions
Check whether the Main Controller PCB 1 and the Main Controller PCB 2 are properly
inserted.
Check whether the connectors are securely connected. LEDs are not lit when the contaction
is poor. (Power-on is not possible)
When the LED of the Control Panel main power is not lit, check the connection of cables (such
as UI Cable).
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■
■
Checking■the■lighting■of■the■LED4■RED■on■the■Main■Controller■2■
LED4 is lit.
- Check for any blown-out fuse of the Relay Board
- Check whether the connector (on the Main
Controller PCB 2 side) is securely connected
Normal opera ti on
Check the ligh ti ng of the LED on
the Main Controller PCB 2
Yes
No
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