Samsung WC-M15i Series Service Manual page 69

Troubleshooting
Error code 3-010
Fault Fuser Error
Description
All the lamps on the operator panel blink and the system stops.
Check
1. Fuser
2. Engine board
Cause
1-1. Thermostat, AC wire, or heat lamp may be open.
1-2. Thermistor may be open. (DCU error code 60, 62, 68.)
2-1. Abnormal heat lamp on/off
2-2. Malfunction of the overheat circuit
Solution
1-1. Check thermostat, AC wire, and heat lamp. If the thermostat is open, check also R37, R47, or Q8.
1-2. If thermistor is open, check the wire. If the wire is good, check Q8. Q8 collector should be 0.2V,
base 0.7V.
2-1. Check Q3 and its related parts in the order shown below.
1) Check Q3 C-E, B-E, B-C, and replace if shorted. If the voltage between B and E is below 0.7V,
replace the transistor.
2) When lamp is on, if the base is 0V, check CPU pin 38.
3) When lamp is on, if the collector is 0V with lamp off, check PC151, Q101, and its related parts.
2-2. Check the overheat circuit. When U5 pin 7 is below 0.5V, the overheat circuit should activate and
the lamp turns off. In normal mode, pin 6 is approximately 2.6V, pin 5 is over 2.6V, and pin 7 is
over 4V. If not, check all related parts.
Remark
Others
5-32
Model ML-6100
Samsung Electronics