Question about Canon imageCLASS D780 All-In-One Laser Printer
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Posted on Jan 02, 2017
Contact Sensor HP error, Failure in return
When the same error repeatedly occurs after several times of turning the power OFF/ON, execute the following remedies.
(1) Check the connection of Flat Cable between Main Controller Board (J5) and Contact Sensor.
(2) Replace the Flat Cable between Main Controller Board (J5) and Contact Sensor.
(3) Replace the Contact Sensor.
(4) Replace the Main Controller Board.
Posted on Jan 27, 2015
if unplugging it does not solve the problem, the main fan must be replaced because it cannot rotate at proper speed, and the engine controller board should be replaced as well. it controls fan.
Posted on Feb 01, 2015
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