LG PS-S200CW Service Manual page 20

7
Troubleshooting and inspection direction
LED Display Malfunction
Are Main PCB ASM
and Power PCB ASM CONNECTOR
correctly connected?
Is voltage on both C12 terminals
of Main PCB ASM 12V?
Replace Main PCB ASM.
Cleanness lamp Display blinking
Are Main PCB ASM and
Gas Sensor CONNECTOR correctly
connected?
Is the voltage of CN-GAS
PIN 1.3/CN-DUST PIN 5V?
Replace Gas Sensor ASM.
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Only for training and service purposes
YES
YES
YES
YES
-20-
NO
• Check CN-DSP connection
NO
• Replace Main PCB ASM.
NO
• Check CN-GAS connection.
NO
• Replace Main PCB ASM.
LGE Internal Use Only