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NO DEFECT APPEARANCE
When the TV is operated for the first time,
1
STANDBY LED lights but the TV switches on
Standby LED does not ligh ever.
2
Standby LED does not light and/or IR receiver
3
does not work.
Picture is available but there is no sound.
4
Sound is available but there is no picture.
5
Neither picture nor sound is available.
6
TV switches on but constantly switches to HDMI
input. While trying to tune a channel, always
7
switches to C05.
No sound from PC or YPbPr.
8
TFT backlight level cannot be controlled, it's level
9
is fixed.
TV switches on; however, after a short break, it
10
switches off again by itself.
DEFECT IDENTIFICATION AND SOLUTIONS
IC403 E2Epron is plugged empty, after the programming process of the first values has finished, TV will switch on by itself.
Are there 3.3V on IC001's bottomright pin? If no, 3.3V are not drawing in, there can be an error in PW board; underneath VCTP, SMD material can be disintegrated.
Are there 1.8V in IC001 solder area? If no,1.8V are not drawing in; IC001 can be defective or underneath VCTP, SMD material can be disintegrated.
Are there 3.3V on IC406's top left pin? If no, IC406 can be defective.
Are there 1.8V on S719? If no, IC001 can be defective.
Are there 3.3V on S700? If no, there can be an error in PW board.
Are there 5V on pin PL409 5? If no, there can be a problem in PW board or SMD material can be disintegrated.
Are there 24V on the pin, which is indicated as number 1, of PL001 socket. If no, there can be a problem in PW board. L603 can be cold soldering.
PL406 can be cold soldering.
Is there display voltage in Q005's top points? (for LG 12V, for other displays 5V). If no; L007 for LG, L006 for other displays can be unplugged.
Q005 can be defective.
Are there 5V in 7th pin of tuner? If no, IC007 and surrounding equipment can be defective, L101 can be defective.
Are there 33V in 9th pin of tuner? If no, there can be a problem in PW board.
Are there 3.3V in L104 inductor? If no, there can be a problem in PW board.
Are there 12V in pin 8 of the PL003 socket? If no, there can be a problem in PW board.
Q410 and Q411 can be defective.
Are there 10V in the mid pin of IC004? If no, IC004 can be defective.
Are there 8V on L200? If no, there can be a problem in D004, D005, D006 or there could be cold soldering.
Are there 1.8V on S719? If no, IC001 can be defective.
Are there 3.3V on S700? If no, PW board can be defective.
IC702 can be defective.
S705 and S706 can be cold soldering.
IC905 or surronding equipment can be defective.
IC 905 supply voltage may not be drawing in 10V.
Q002, Q003, 1006 or surrounding eqipment can be defective or SMD material can be disintegrated.
When the TV is switched on; there should be displayed voltages as following: 5V on C074, 3.3V on PL004 pin 4, 8V on IC004 mid pin and Q005 top points. If one is missing, TV may shut
down after a short while after it is switched on.
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