8 SAMSUNG ELECTRONICS CO., LTD
6. Trouble Diagnosis°· As the micom wash machine is configured of the complicate structure, there might be the service call.
Below information is prepared for exact trouble diagnosis and suitable repair guide.
1) As some electronic components are damaged by the charged static electricity from the resin part of wash
machine or the human body, prepare the human body earth or remove the potential difference of the
human body and wash machine by contacting the power supply plug when the work contacting to PCB is
executed.
2) Since AC220~240V is applied to the triac T1 and T2 on P.C.B, the electric shock may occur by touching
and be careful that the strong and weak electricity are mixed.
3) If the P.C.B assembly is out of order, do not replace the component on P.C.B except TACT switch since
the component is coated by the urethane.
4) As the P.C.B assembly is designed for no trouble, do not replace the P.C.B assembly by the wrong
diagnosis and follow the procedure of the trouble diagnosis when the micom is not operated normally.
5) As the parts on P.C.B are coated by the urethane, they can not be tested by the test bar of the meter.
Check the trouble by the test mode method according to the procedure.
Caution for the Repair and Replacement
Please follow below instruction for the trouble diagnosis and parts replacement.