LG LMC1575BD Service Manual page 35

Symptom : Dead, Not heating
Symptom :
Dead
Check :
Open / Short
Fuse Holder
L L
AC
127V
60Hz
N
N
Earth
CT
Input Current
LMC1575BD /00
LMC1575ST /00
LMC1575SW /00
LMC1575SB /00
Symptom :
Not heating
Check : Induct
ance (T3)
Rectifier
Circuit
Input Voltage
Sensing
Regulator
15V
Symptom :
Not heating (F-13, F-14, F-15, F19)
Symptom :
Check : Open / Short (D5)
Not heating (F-13, F-14, F-15, F-19)
Check : Open / Short (D8, D9))
Inverter PCB
Single-Ended
Resonant Circuit
Resonant Voltage
Sensing Sensing
3.5. IGBT Gate Driver
Surge
Protection
MCU
5V
RX TX
CN3
CN8
Writing
Main
SMPS
Comm.
SMPS PCB
Symptom :
Not heating (F-11)
Check : Connection
Open/Short
(CN3, CN8)
5-23
F_CN1
High Voltage
Magnetro
Circuit
n
F_CN2
GND
Chassis
Ground
Symptom :
Not heating (F-19)
Check : Resistance
(Q1, ZD201)
Trigger &
PT Circuit
B/D
Reset
Temp.
Themistor
Circuit
Symptom :
Not heating (F-16, 17)
Check : Open / Short
Resistance
(TH91)