LG LMC1575ST - Page 39

5-27
D9 D8
※ Tester mode : Beep mode or
resistor mode
Status Test result
Normal Open (OL)
Abnormal Short (Beep)
• Check D5 (Bridge Diode)
※ Tester mode : Diode mode
Bridge Diode : AC Checking
※ Tester pin color
Bridge Diode : DC Checking
Status Test result
Normal 0.4V ↑ (about 0.4 ~ 0.6V)
Abnormal 0.4V ↓ or short
Example : normal
• Check TH91 (Thermistor)
Example : abnormal
(Short or Open)
※ Tester mode : Beep or resistance mode
Status Test result
Normal 20Kohm↓
@ Room temperature
Abnormal Open or Short
Thermistor : TH91
17.42Kohm @ Room temperature
23.3℃
Example : normal
2. F-16 or F-17 Inverter PCB Check
3. F-13 or F-14 or F-15 Inverter PCB Check
Example : abnormal(Short)
Example : abnormal
(Short)
Example : normal
(Open)
LMC1575BD /00
LMC1575ST /00
LMC1575SW /00
LMC1575SB /00