Samsung Electronics
7-8
Troubleshooting
7-4 After-Repair Check Listd
No
Check item
Checking and judging method
Remarks
1
Insulation resistance When measuring the insulation resistance between
DC 500V Megatester
the power plug and the grounding wire(with the
power plug disconnected from the socket and the
door closed) the resistance should be greater than
1
§
or above. When to check :
a. When the electric field parts are exchanged
b. If the MWO is used in a very humid envir qwment
c. Unit is older than 5 years
2
Safety switch
Check that the safety switch is
Safety switch
operation
operating correctly when opening and
Monitor switch
closing the door
Door detection switch
3
Applicability of parts Check that exact replacement parts are being used
AC 230V
4
Placement of
Check for looseness, jamming or terminal insertion
lead wire
of the lead wire. (check that there are no shorts to
ground.
5 Connection of
Check the connection between he screw and bolt.
screw and bolt
6
Alien substance
Check for a cut line within the equipment,
insertion check
combustible foreign matter, or loose hardware.
7
Power cord check
Check that there is no damage to the cord, plug,
socket etc.
Also check that power rating is adequate.
8
Grounding check
Check that the main body is grounded to the
For the PCB ground
PCB.
wire and power cord
ground wire,
Explain to the customer that he following are
Check the continuity
dancerous hazards :
to ground.
a. Connection to the gas pipe
b. Connection to the vinyl water pipe
c. Connection to the telephone line.
