Brother LH4-B800E Service Manual page 166

Code
1. Check the power supply voltage in the workplace and the power supply voltage specifications for
the control box.
2. Check the connection positions of connectors CN1 and CN2 on the 1-step power supply circuit
E-95 board.
E-96 * 200V specification --- CN2
* 220V specification --- CN3
* 230V specification --- CN4
* 100, 110, 240, 380, 400, 415V specification --- CN3
1. Check if the timing belt is attached.
2. Turn the machine pulley by hand and check that the upper shaft does not lock and the pulley is
not loose.
3. Check if connectors P3 and P6 on the main circuit board are securely inserted and if any
harness is broken or short-circuited.
E-97
4. Check if machine motor harness connector CN7 and power supply harness connector CN8 on
the 1-step power supply circuit board are securely inserted and if any harness is broken or
short-circuited.
5. Replace the 1-step power supply circuit board.
6. Replace the main circuit board.
ArEA Refer to "6-7. Error code table".
C-Er Refer to "6-7. Error code table".
Countermeasure
LH4-B800E
6. ELECTRIC MECHANISM
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