LG LMC1575BD Service Manual

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

LG LMC1575BD Specifications

General

Style	counter top
Color	black stainless steel
Total Capacity	1.5 cu. ft.
Convection	no
Power Levels	10
Sensor Cooking	yes
Quick Start	no
Timer	yes
Interior Light	yes
Microwave Power	1, 250 watts
Voltage	120 volts
Current	15a

Weight and Dimensions

Depth	17 inch
Height	12 13/100 inch
Width	21 41/100 inch