LG 29FU1RL/RG Service Manual page 12

4) No Picture/ No Sound
OK
522
522
522
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Only for training and service purposes.
NO
Check IC501 pin 8,
7, 6 (R, G, B out)
tu2522
NO
NO
tu2522
Check the waveform
pin20(H-out)
tu2522
OK
P20A (R, G, B out of
IC501)
Is any OSD displayed?
Check receiving system in MENU
& execute Auto - Program
Does the auto - Program tu2522
operate properly
Store on manual -program MENU
NO
tu2522
Check IC501 pin 8,
7, 6 (R, G, B out)
OK
Check pin68 Reset
Voltage
OK
tu2522
NO
Check pin77, 76
SCL, SDA
OK
Replace IC501
- 12 -
OK
OK
Check SMPS Trans
Secondary Voltage
Check IC12(EEPROM)
& SCL, SDA, Line
P20A (R, G, B out of
IC501)
OK
tu25
tu25
Go to No sound/
picture OK
tu25
LGE Internal Use Only