E401 on a 6545 is the RDF (reversing doc feeder) pick up motor or pick up sensor problem. Does the rdf attempt to pick up the original or do you get the error as soon as you press start? Are you aware of how to remove all the rdf covers? The pick up motor has a timing wheel & sensor that need to be periodically cleaned.
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Hold down red cancel
Select system/copy sp
On keypad type in 7807#
Tap execute On the screen
Switch machine of and on again
Machine should be good to use, unless you have a actual problem then the machine will go back to error state.
Heater temperature error (abnormal drop; low-temperature detection)
The main thermistor reading is lower than 140°C when paper is moved. Main cause: The fixing film unit is faulty (i.e., the main thermistor (TH1) has poor contact or has an open circuit; or, the fixing heater is faulty). The main power supply PCB is faulty. The DC controller PCB is faulty. Caution: To clear the error, execute the following in service mode: COPIER>FUNCTION>CLEAR>ERR. Action: 1. State Turn on the power switch, and clear E002/E003. Thereafter, turn off and then on the power switch. Does the fixing heater operate? NO: See "The fixing heater fails to operate." 2. Wiring Is the wiring from the DC controller PCB to the fixing film unit normal? NO: Correct the wiring. 3. Fixing film unit, DC controller PCB Try replacing the fixing film unit. Is the problem corrected? YES: End. NO: Replace the DC controller PCB.
The main thermistor TH1 has poor contact or open circuit.The thermal switch TP1 has an open circuit.The fixing heater has an open circuit.The SSR is faulty or the DC controller PCB.After the main power switch is turned ON the temperature detected by the main thermistor does not reach 70 C.The error must be reset in service mode :COPIER - FUNCTION - CLEAR - ERR