panasonic TC-L58E60 1 blink code

[nwcs]

This TV turns on and I get a quick picture when the back lights fire. I get this four times then shuts off and the power light blinks one blink repeatedly. I initially thought bad back light but now I am not sure. The voltages to cn1 when the back lights come on are as follows.
pins 1-5 24V then down to 0
6-10 Gnd
11 err 0v then up to 2.5v
12 Bl on 3.28 down to 0
13 nc
14 E-pwm 2.8v down to 1.5
I cant find a service manual for this model and was wondering had any thoughts what else to check. I can't find any voltages listed for p2. I do not really want to pull the panel off if i don't have to but that looks like it is next.

[dskall]

Re: panasonic TC-L58E60 1 blink code

Will need better shots of your boards. Straight on

[mike in bremerton]

Re: panasonic TC-L58E60 1 blink code

There is a little more to this now. If I disconnect all of the LED power from the led driver board to the led's and then test the voltages there is no drop until maybe 45 seconds then it shuts off and the power light will blink the one blink code.

[attainteddragon]

Re: panasonic TC-L58E60 1 blink code

if your vled+ is good on the inputs, reattach the led cables and measure the vled- as it fires the backlights. record the initial spike and what it settles too.

you will most likely have to do this once for every string of led's. looks like 16 of them.

you are most likely looking at failed led's at this point.

[nwcs]

Re: panasonic TC-L58E60 1 blink code

Let me check that and get back to you.

[nwcs]

Re: panasonic TC-L58E60 1 blink code

I only see 4 VLED - and 4 VLED + at the connections to the led's from the led driver board.
they read all over the place each time they fire but the seem to be anywhere from 6v to 8v when lit and 8v to 10v when not. Vled+ is anywhere from 8 to 7 when firing and 13 to 14 when off. These seem strange to me.

[BookWormStud]

Re: panasonic TC-L58E60 1 blink code

Did you find a solution for this?

My TV also has the same problem

On Service Manual it says


Contents : BL_SOS

Check Point : A Board
Panel

What does it mean? Please explain.

[nwcs]

Re: panasonic TC-L58E60 1 blink code

I replaced the A board and P board with no change but I could have got a bad board and did not know it. I did test the LED's and they are fine so I am going to presume a bad panel and notified the customer of such. I wish I could have a definitive answer but I do not.

[dskall]

Re: panasonic TC-L58E60 1 blink code

How did you test led's?

[BookWormStud]

Re: panasonic TC-L58E60 1 blink code

is there any way jump the wires and turn on the Backlights with A/Main Board disconnected from P-Board ?

[nwcs]

Re: panasonic TC-L58E60 1 blink code

I believe I may have found my problem anyway. I thought I had tested the LED's but now I am not sure. I removed the panel and noticed what looks like burn marks on all four connectors. The right hand side ones are darker than the left.
I have never seen dark discoloration on the led connectors before. Am I correct or is this not unusual.

[dskall]

Re: panasonic TC-L58E60 1 blink code

I would say you have poor connections

[nwcs]

Re: panasonic TC-L58E60 1 blink code

I agree, I put my led tester on the pos and neg and the led's lit up. I am going to try and clean the contacts but I do not hold much help

[dskall]

Re: panasonic TC-L58E60 1 blink code

New ribbon cables or solder cable connectors to the pins

[guyaca]

Re: panasonic TC-L58E60 1 blink code

LCD TV model thl 32 c4m switch off after -20 minutes

[dskall]

Re: panasonic TC-L58E60 1 blink code

LCD TV model thl 32 c4m switch off after -20 minutes

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