7-22
PROBLEM - E:
Unit does not heat up even if display counts down when
START key is touched for “HIGH POWER” cooking.
Check: 1. PRIMARY AND SECONDARY INTERLOCK SWITCHES
2. THERMOSTAT
1
2
Runs
Contact
OK
NO
continuity
Replace
circuit board
Normal
circuit board
Poor contact
Replace
circuit board
Normal
circuit board
Contact OK
Normal
contact
Correct
seating
Check contact of
connector S1
Check the contact of
relay 7(see page 7-16)
Runs
Runs
Resistance
incorrect
Check the continuity of
H.V
.C. (see page 7-16)
Normal H.V
.T
.
Resistance
incorrect
Normal H.V
.C.
Abnormal
Replace H.V
.D.
Normal
Magnetron
Replace
Magnetron
Normal
Normal
H.V
.D.
Check the
continuity of H.V
.D.
(see page 7-16)
Replace H.V
.C.
Normal
resistance
Replace H.V
.T
.
Normal
resistance
Measure resistance of
H.V
.T
ransformer
(see page 7-15)
Runs
Runs
Runs
Runs
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Summary of Contents for MVH1670ST
Page 43: ......
