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TP2   rch6a50

Backlight not working, sound ok.

Replace R707 with 2K

r707

Standby led is blinking.

Check 5V circuit and U600

Stuck in standby mode.

Check 5V via pin 13 of J601. If ain't voltage, replace power supply board. If 5V is normal value, check 3.3V via pin 7 of U600. If 3.3V is normal value, replace U600. If 5V is missing, check 3.3V via pin 87 of U000. If 3.3V is missing, replace U000. If 3.3V is normal value, check Q600, U614, U616 and U800

No picture, backlight work.

Check Panel_VCC (5V or 12V) via C752. If ain't voltage, check Q602 Q603 Q606 (for 12V) and D601 L607 U601 (for 5V). If Panel_VCC is normal value, replace Tcon board or update the TV software

Backlight not working.

Check C62 and inverter transfomers

No sound.

Check audio signal via pin 5 and pin 48 of U520. If signal is normal value, check 12V via C534. If 12V is normal value, replace U520. If 12V is missing, check 12V circuit.

If audio signal is missing, check U000, U617, U302 and 5V circuit.

Entering The Service Menu

To enter Service Menu, via 'menu' -> '8500' (or 9301) by remote control.

To exit from service menu, press 'menu' button.

PANEL LOCK ENABLE : Default is NO

POWERON ALWAYS TO STBY : Default is YES

ATS SORT : Default is AVAIL.

ENABLE TOP : Default is YES

TUNER TYPE : Set by Tuner brand.

FACTORY MODE : Default is NO.

AGC ADJUST : Default is 8.

SPECIAL KEY PAD : Set by key pad type.

SWAP/ZAPP : Default is ZAPP.

PIP ENABLE : Default is YES.

POWER UP SOURCE TV : Default is TV/AV.

DTV MODULE : Set by chassis type.

RESET TV SET: not set.

OTHER SETTING : not set

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