sharp lc-c3234u

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first when i plug in the tv the green light blinks then when i hold the power button for 15 seconds then the power light turns solid red and when i press it again it turns yellow and the lcd comes on for 5 seconds then evey thing goes black and 5 seconds after that you can hear the relay on the power board click and then the green light blings again. all the caps look good but i have found one bad diode but i can not find a schematic for this power board. (runtka397wjqz) i will add pics soon. thank you for any help in avance

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Re: sharp lc-c3234u

here is the pics

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Re: sharp lc-c3234u

The bad diode i found has d7134 next to it but this code is useless with out the part list or schematic right or is there a nother way?

[budm]

Re: sharp lc-c3234u

The picture is too blurr to see that bad diode, can we get good clear pictures so may be we can figure out the function of the diode is?

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Re: sharp lc-c3234u

i put white arrow pointing to it this time

[budm]

Re: sharp lc-c3234u

Does it show shorted when you measure it with one leg lifted off the board? Not sure the function of this diode, it is small so it will not be for power.

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Re: sharp lc-c3234u

the diode was good

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Re: sharp lc-c3234u

how do you test the inverter board or backlight

[budm]

Re: sharp lc-c3234u

The board you are working right now is a power supply/backlights inverter board combination.
There are many things to test on this board, such as the secondary windings resistance of the inverter transformers (you have five of them on your board), fuses, burnt component, shorted/open transistors, MOSFET's, Diodes, bad traces/connections.
To test the lamp, you will need working backlights inverter board to drive the lamps.
Can you tel us the blinking pattern of the power light, may be we can look up the error codes for it.

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Re: sharp lc-c3234u

i found out that sharps have led flashing timing chart for error notification and my error type is lamp failure

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Re: sharp lc-c3234u

also my tv is not doing the same as post one now when i plug in the tv the power light goes solid then the tv turns on by is self then off then on then off and then blinks the error code one fast blink then it goes one blink a second

[budm]

Re: sharp lc-c3234u

It will not be easy to get to the lamps to inspect which one is bad, if it does have lamp failure you should see the backlights flash on for seconds (because the inverter will try to fire up the lamps) and it will go into shutdown and then provides the error code. Try looking at the screen in a dark room and see if the lamps even fired up (they have too for seconds because that how the detection circuits will know if the lamps do fire up and stay on for the first 3 seconds or not, if that condition does not happen in that time period, the circuits will go into shutdown with an error codes.
Everything hook back up correctly?

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Re: sharp lc-c3234u

i looked at the screen in a dark room and it looks like they all lit up

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Re: sharp lc-c3234u

also when i first got this tv i was able to access the menu once for about 30 to 60 second befor the relay triped. i do not know if that will help or not

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Re: sharp lc-c3234u

i put the board back in. now it has been on for 30 minutes and all the back lights are good. but what could of caused this?

[budm]

Re: sharp lc-c3234u

So are you getting pictures on the screen? Some Sharp TV uses the lamps with metal caps at the ends and then snapped into the lamp sockets, may be some came loose?
Some of them may have wires solder to the ends of the lamps and they do have wire burnt out problem, this happen a lot in the monitor: http://s807.photobucket.com/albums/y...klight%20lamp/

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Re: sharp lc-c3234u

it stop working I unplug the tv to move it and now it wont stay on but i did get in the service menu. this is what i found lamp err 0 and monitor err cause 6

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Re: sharp lc-c3234u

now i can get it to work some times but some time the top of the screen will start flashing and then go away

[selldoor]

Re: sharp lc-c3234u

So are you getting pictures on the screen?

you need to answer this

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Re: sharp lc-c3234u

yes i have been using it as my 3 Monitor