Malfunction - Samsung ML-1640 Service Manual

4.2.3 Malfunction

1) Red LED on (On line/Error LED) (Fuser Error)
• Description 1. Red LED on (On line/Error LED)
2. Gear of the fuser does not work and breaks away melt away.
When printing, motor breaks away from its place due to defective fuser gear.
1. Check if the thermostat,
AC wire and Heat Lamp is open.
2. Check if the thermistor
3. Check if the heat lamp
4. Check if the overheat
5. The fuser gear is defective
Service Manual
Alignment & Troubleshooting
sensor is in place.
works properly.
circuit works properly.
due to melting away.
If the thermostat is open replace
the fuser and check following items.
If the thermistor sensor device is
located deep in the sponge,
replace the fuser.
Check if the circuit of overheat
mode works properly.
Run DCU mode : Perform DCU
diagnostic code 10.
Replace Fuser.
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Samsung Electronics