Sharp LC-60LE832U

[RickSinGA]

Re: Sharp LC-60LE832U

Pin# - Pin Description - Pin Voltage standby - Pin voltage power on
1 - PNL 12v - 0v - 1.3mv
2 - PNL 12v - 0v - 1.3mv
3 - GND - 0v - 000v
4 - GND - 0v - 000v
5 - S13.2v - 0v - 13.06v
6 - S13.2v - 0v - 13.06v
7 - UR13.2v - 0v - 13.06v
8 - UR13.2v - 0v - 13.06v
9 - GND - 0v - 0.4mv
10 - GND - 0v - 0.4mv
11 - GND - 0v - 0.3mv
12 - GND - 0v - 0.3mv
13 - AC - 0.1mv - 3.34v
14 - PS - 0.1mv - 4.68v
15 - BU5v - 5.08v - 5.08v
16 - PNL - 0mv - 117.1v
17 - PWM1 - 0mv - 5.1mv
18 - NC - 0mv - 16mv
19 - DIMMER - 0mv - 2.3mv
20 - NC - 0mv - 000v
21 - NC - 0mv - 000v
22 - ERROR - 0mv - 2.2mv
23 - PWM2 - 0mv - 3.6mv
24 - STB - 0mv - 2.2mv

[budm]

Re: Sharp LC-60LE832U

OK to get 12vdc OUTPUT at the PNL- 12V, you will need another 1K resistor between BU5V pin and the PNL-POW pin 16.

[RickSinGA]

Re: Sharp LC-60LE832U

To be sure I understand (bad case of O.L.D.).

No resistor on 14/15? Place a 1k resistor on 15/16?

This is with the other boards disconnected from the PB? Take new readings?

Are these resistors for testing purposes only?

[dskall]

Re: Sharp LC-60LE832U

Is pin 16 reading 117v?

[budm]

Re: Sharp LC-60LE832U

I think he means mV.

[budm]

Re: Sharp LC-60LE832U

To be sure I understand (bad case of O.L.D.).

No resistor on 14/15? Place a 1k resistor on 15/16?

This is with the other boards disconnected from the PB? Take new readings?

Are these resistors for testing purposes only?

No, you need two resistors to simulate two control signals.

[RickSinGA]

Re: Sharp LC-60LE832U

So 1k jumping 14/15 and another 15/16 other connectors disconnected?

Pretty sure it was volts but will double check.

[budm]

Re: Sharp LC-60LE832U

So 1k jumping 14/15 and another 15/16 other connectors disconnected?

Pretty sure it was volts but will double check.

Correct, we are still test the power supply board by itself at this point.

[RickSinGA]

Re: Sharp LC-60LE832U

That was mv on Pin 16

1k jumpers on 14/15 and 15/16
Pin# - Desc - Off - On
1 - PNL 12v - 0v - 12.06v
2 - PNL 12v - 0v - 12.06v
3 - GND - 0v - 000v
4 - GND - 0v - 000v
5 - S13.2v - 0v - 13.06v
6 - S13.2v - 0v - 13.06v
7 - UR13.2v - 0.1mv - 13.06v
8 - UR13.2v - 0.1mv - 13.06v
9 - GND - 0v - 0.4mv
10 - GND - 0v - 0.3mv
11 - GND - 0v - 0.3mv
12 - GND - 0v - 0.3mv
13 - AC - 0v - 3.34v
14 - PS - 0v - 4.68v
15 - BU5v - 0v - 5.09v
16 - PNL - 0.1mv - 5.04v
17 - PWM1 - 0.1mv - 5.1mv
18 - NC - 0.1mv - 000v
19 - DIMMER - 0mv - 2.2mv
20 - NC - 0mv - 000v
21 - NC - 0mv - 000v
22 - ERROR - 0mv - 2.1mv
23 - PWM2 - 0mv - 3mv
24 - STB - 0mv - 2.1mv

[budm]

Re: Sharp LC-60LE832U

So we simulate the command signal PS-ON to turn on the S13.2V switched power supply, we also simulate the PNL-PWR command signal to get the PNL 12V for running the T-CON board and you are getting the correct Voltage. So now you need to find out why the main board is not sending the command signal.
"22 - ERROR - 0mv - 2.1mv" I suspect this error pin may be the problem, if I remember correctly this should be around 3VDC or to tell the main board that the incoming AC is within the operating range.

[RickSinGA]

Re: Sharp LC-60LE832U

Is there a way to verify your conclusion, and more importantly a way for a novice, (that may be overstating my ability), to fix it?

Thank you by the way.

[budm]

Re: Sharp LC-60LE832U

Correction, it is the AC det that should be around 3V and you do have the 3V.
The ERROR pin, you will have to search the thread to find out what it should be.

[RickSinGA]

Re: Sharp LC-60LE832U

Any particular thread?

[budm]

Re: Sharp LC-60LE832U

This is one of them.
https://www.badcaps.net/forum/showth...ghlight=AC+DET
I believe that ERROR pin is for the BACKLIGHTS circuit error signal.
Follow-up:
I found some Sharp TV training manuals at ELEKTROTANYA.
It looks to be that if the ERROR pin Voltage is HIGH that will be abnormal condition.
Read more about it here: You can download the PDF and study them.
https://www.badcaps.net/forum/showth...383#post757383

[RickSinGA]

Re: Sharp LC-60LE832U

Is it fair to say that the PB is bad, maybe fixable, but bad?

[budm]

Re: Sharp LC-60LE832U

So we need to clean up your Voltage reading on post 10 by having all the boards connected back up, the two resistors are removed and then report you Voltage reading when the power switch is not activated and when power switch is activated. I do not want to see the readings showing ???V, I want to know exactly what it shows on your meter.
For example of your reading on post #10:
15 - BU5v - 5.08v - ???v
I cannot see how that BU5V (STANDBY 5V) becomes ???V. It should show 5V on your meter when the TV is OFF and when the TV is ON.

[RickSinGA]

Re: Sharp LC-60LE832U

okay, will be tomorrow. Thanks

[RickSinGA]

Re: Sharp LC-60LE832U

No resistor, everything plugged in, TV power off? (I assume), power cord plugged into a hot wall receptical.

I have no way to turn the tv on so I cannot give you those numbers.

Still one long blink and one short.

Pin# - Desc - Off - On
1 - PNL 12v - 0v -
2 - PNL 12v - 0v -
3 - GND - - -
4 - GND - - -
5 - S13.2v - 0.1mv -
6 - S13.2v - 0.1mv -
7 - UR13.2v - 0.1mv -
8 - UR13.2v - 0.1mv -
9 - GND - 0v -
10 - GND - 0v -
11 - GND - 0v -
12 - GND - 0v -
13 - AC - 0v -
14 - PS - 0v -
15 - BU5v - 5.08v -
16 - PNL - 0v -
17 - PWM1 - 0v -
18 - NC - - -
19 - DIMMER - 0.1mv -
20 - NC - - -
21 - NC - - -
22 - ERROR - .4mv -
23 - PWM2 - 0.1mv -
24 - STB - 0v -

[budm]

Re: Sharp LC-60LE832U

Leave meter black probe on the chassis and leave the red probe of the meter on pin 14 PS-ON then hit the TV's power switch to see if there is any activity on that pin or not, if not then you have main board problem.

[RickSinGA]

Re: Sharp LC-60LE832U

No activity from above actions.

I jumped the gun and ordered a power Board, now to find a Main Board.

If anyone needs a PB, I have one coming on a slow boat from China!

Thanks for all of the help.