LG LMC1575BD Service Manual page 43

2. F-16 or F-17 Inverter PCB Check
• Check TH91 (Thermistor)
Thermistor : TH91
3. F-13 or F-14 or F-15 Inverter PCB Check
• Check D5 (Bridge Diode)
+ ~ ~ -
Bridge Diode : AC Checking Bridge Diode : DC Checking
※ Tester pin color
LMC1575BD /01
LMC1575ST /01
LMC1575SW /01
LMC1575SB /01
※ Tester mode : Beep or resistance mode
Status Test result
Normal 20Kohm↓
@ Room temperature
Abnormal Open or Short
※ Tester mode : Beep mode or
resistor mode
Status Test result
Normal Open (OL)
Abnormal Short (Beep)
17.96 Kohm @ Room temperature
23.3℃
Example : normal
Example : normal
(Open)
※ Tester mode : Diode mode
Status Test result
Normal 0.4V ↑ (about 0.4 ~ 0.6V)
Abnormal 0.4V ↓ or short
Example : normal
5-31
Example : abnormal
(Short or Open)
Example : abnormal(Short)
Example : abnormal
(Short)