Sharp LCD TV LC-32L50M blinking red light 5X

[bangjay]

I had problems with Sharp LCD TV LC-32L50M, current conditions, if I turn it on the LED indicator green and red flashing alternately several times, after that only a red LED that flashes 5x, when the red light flashing, all the buttons does not work.

according to my analysis, this tv failed to start because of a protected, I've tried to go to service mode with Vol - and TV / Video and plug the power, but the tv screen was still dark, there is no display anything on the screen. and LED indicators remain blinking as described above.

I've tested the voltage in the power supply. everything is ok.

1. BU1.8V ok
2. BU2.5V oK
3. BU3.3V OK
4. BU5V OK
5. BU12V OK
6. DC 14V / 24V OK


anyone can help me? whether about the problem?

[budm]

Re: Sharp LCD TV LC-32L50M blinking red light 5X

Can you please upload the whole service manual so I can look through it?

[fredaelsadany]

Re: Sharp LCD TV LC-32L50M blinking red light 5X

hallo
try to measure voltages on pic and tell us your readings .
thanks

[bangjay]

Re: Sharp LCD TV LC-32L50M blinking red light 5X

Can you please upload the whole service manual so I can look through it?

Thankyou for the response, here i attach the manual service for your reference



thank you before.

[bangjay]

Re: Sharp LCD TV LC-32L50M blinking red light 5X

hallo
try to measure voltages on pic and tell us your readings .
thanks

Here I attach the results of testing the voltage on the main power unit.

1. When i press the power button the PFC output voltage is 390Vdc. but after about 6 seconds, the voltage dropped to 312Vdc.

2. STBY_CONTROL is 0Vdc.

3. All Pin 4 Optocopler is 1.8Vdc.

4. Pin 6 NCP 1337 (IC 7201) is 1.8Vdc.

thank's before.

[fredaelsadany]

Re: Sharp LCD TV LC-32L50M blinking red light 5X

hallo
that is good .
the main board not working good .
please good photo to MB . TO COMPLETE SEARCH .
THANKS

[bangjay]

Re: Sharp LCD TV LC-32L50M blinking red light 5X

hallo
that is good .
the main board not working good .
please good photo to MB . TO COMPLETE SEARCH .
THANKS

This is a photo of the mainboard. and I also attach the schema for this mainboard. please check, if incomplete please let me know.

Thank You

[bangjay]

Re: Sharp LCD TV LC-32L50M blinking red light 5X

hallo
that is good .
the main board not working good .
please good photo to MB . TO COMPLETE SEARCH .
THANKS

Hi Fredaelsadany

Are you sure the problem is on the mainboard? if I replace the main board this issue will be resolved?

Please help,

thank you before.

[fredaelsadany]

Re: Sharp LCD TV LC-32L50M blinking red light 5X

hallo
please Try to reset your tv as follow :
1. Turn off the TV.
2. Unplug the power cord of the TV from the electrical outlet.
3. Let the TV remain without power for 2 minites
4. put it to power press power sw
measure on/off voltage when you power on tv .
thanks