LG LMC1575ST - Page 35

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