Description: Error detection at FAX control section
Causes: If the communication between the main PWB and the FAX is interrupted, the signal is resent but it continues to wait until necessary signal comes in and locks up.
Remedy: 1 Resetting the main power As the power reset was performed instantly, an error occurred in the communication between the controller and the FAX. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch. 2 Checking the connection The FAX PWB is not connected properly. Clean the following connection terminals and reconnect the FAX PWB. EMain PWB - FAX PWB Service Manual - Section 8 "PWBs" FAX Installation Guide 3 Firmware upgrade The firmware is not the latest version. Upgrade the fax firmware to the latest version. Firmware Update 4 Replacing the FAX PWB The FAX PWB is faulty. Replace the FAX PWB. FAX Installation Guide
Code: F186
Description: Abnormal detection in the Video control section
Causes: There is an error in the communication between the main PWB and the engine PWB.
Remedy: 1 Resetting the main power As the power reset was performed instantly, an error occurred in the communication between the controller and the engine. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch. 2 Checking the connection FFC is not connected properly. Or it is faulty. Clean the following FFC terminal of the FFC and reconnect. If the FFC terminal is deformed or FFC is short circuited, replace FFC. • Engine PWB (YC35) - Main PWB (YC43) Service Manual - Section 8 "PWBs" 3 Firmware upgrade The firmware is not the latest version. Upgrade the main firmware and the engine firmware to the latest version. Firmware Update 4 Replacing the main PWB The main PWB is faulty. Replace the main PWB. Detaching and reattaching the Main PWB 5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Detaching and reattaching the Engine PWB
Code: F278
Description: Error detection of the secondary power supply
Causes: The operation became unstable as the primary power supply temporarily drops off and recovers.
Remedy: 1 Resetting the main power The power reset was performed instantly. Turn off the power switch and the main power switch. After 5 seconds, turn on the main power switch and the power switch. 2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the connector on the low voltage PWB and reconnect the connector of the wire. If there is no continuity, replace the wire. Service Manual - Section 8 "PWBs" 3 Replacing the low voltage PWB The low voltage PWB is faulty. Replace the low voltage PWB. Detaching and reattaching the Low Voltage PWB