LG LFX28968SW Service Manual - Page 56
LED Lamp
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12-1 Check A - There is PC Board located in the PCB case. The control driver is PC board for the compressor. - This step shows the source voltage of the driver PC board. Step1. Open PCB Cover Step2. Check Driver PCB LED Lamp IPM Output check - Measure the voltage between the POWER and COMM pins of the connector as shown below. Check to make sure compressor is receiving voltage from IPM Multi Tester A-Inverter - In order to determine whether the compressor is operating normally, check the output voltage during the refrigeration cycle. - After initial power-up, when the compressor begins to operate, wait 10 minutes before checking. - The compressor is operating normally if the voltage is greater than 80V. - 56 -
- 56 -
12-1 Check A
-
There is PC Board located in the PCB case.
The control driver is PC board for the compressor.
-
This step shows the source voltage of the driver PC board.
Step1. Open PCB Cover
Step2. Check Driver PCB
LED Lamp
A-Inverter
Multi
Tester
-
Measure the voltage between the POWER and COMM pins of the connector as shown below.
Check to make sure compressor is receiving voltage from IPM
-
In order to determine whether the compressor is operating normally,
check the output voltage during the refrigeration cycle.
-
After initial power-up, when the compressor begins to operate, wait 10
minutes before checking.
-
The compressor is operating normally if the voltage is greater than 80V.
IPM Output check