LG LMC1575ST Service Manual

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Symptom : Not heating (F-11, F-13, F-14, F-15, F-19)
Not heating (Cool : on display)
• Check inverter PCB _ IC parts
Check temperature on display,
after 3 minutes check it again.
(ex. before 90↑→ after 90↑)
※ Method : Temperature checking
󱕒 For 2 seconds, press ‘Cancel key’ and ‘Start key’ (double-key)
For damaged IC test, Check the resistance value of IC Pin and ground using tester.
If all tests are OK, see again ‘Error Code Case’ page.
Normal levels of resistance value ±10%↓ difference : Normal(OK)
󱕒 Short or ±10%↑difference : Abnormal(NG)
※ Normal Level Resistance
U1 : MICOM (R51076C, Renesas) : 15~20Kohm (2 Pin)
U1 : MICOM (R51076C, Renesas) : 4.5Kohm (10 Pin)↑
U6 : Gate driver IC (2EDL05I06PF, Infineon) : 1.0Mohm↑
U7 : OP-AMP (SN358, AUK) : 4.5Kohm↑
U8 : Dual comparator (KIA393F, KEC) : 1.0Mohm↑
※ It may differ slightly depending on the tester.
LMC1575BD /01
LMC1575ST /01
LMC1575SW /01
LMC1575SB /01
U1
U8
U6
U7
Ground
8 Pin
2 Pin
10 Pin
8 Pin
1 Pin

LG LMC1575ST Specifications

General

Style	counter top
Color	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