Samsung LE52F96BDX Clicking...

[lesnajair]

Hi
I wonder if anyone can give me any idea what to do to get this working?
Has clicking sound coming from power board which seems to be coming from blue 'relay' CX8035. The power board is BN44-00186A.

I thought I had narrowed the problem down to the mainboard BN41-00919B by disconnecting all boards and finding that the clicking only comes back when the mainboard is plugged back in to the power board! Having sourced another mainboard, the click is still continuing once its plugged in again.

There were a few caps on the psu with high-ish esr readings which were replaced (35V 1000uF) but clicking still continues.

I have checked the fuses, all are ok. I have taken some readings which I'm sure are ok and are as follows;

CNM802 to inverter
1 120v
2 120v
3 120v
4 120v
5 0.60mv
6 0v
7 0v
8 0v
9 12.1v/1.6v (with clicking on/off)
10 0v
11 7.5mv
12 0v
13 5.4 to 6.4mv
14 10.1mv

CNM804 to mainboard
1 0v
2 5.2v
3 0v
4 4.9mv
5 0v
6 0v
7 1.1mv
8 0.7mv
9 0v
10 2.3mv
11 2.3mv
12 17.5mv
13 15.3mv
14 0v
15 0v
16 2.1mv
17 0v
18 0v
19 0.6mv
20 0v
21 0v
22 0v
23 1.5mv
24 21.3mv


I hope this info might help in some way! Thanks in advance.
Les

[budm]

Re: Samsung LE52F96BDX Clicking...

You need to provide the name of each pin.

[lesnajair]

Re: Samsung LE52F96BDX Clicking...

Oops, sorry, of course. CNM804 pins 1-24 are shown in pic 3. the CNM802 pins are labelled as follows;
1 120v
2 120v
3 120v
4 120v
5 N.C.
6 RTN GND
7 RTN GND
8 RTN GND
9 12V
10 RTN GND
11 N.C.
12 BL ON/OFF
13 Analog Dimmimg
14 PWM Dimming

Hope this is ok, or would it be easier to list the others?

thanks again.

[budm]

Re: Samsung LE52F96BDX Clicking...

'CNM804 to mainboard
1 0v
2 5.2v
3 0v
4 4.9mv
5 0v
6 0v
7 1.1mv
8 0.7mv
9 0v
10 2.3mv
11 2.3mv
12 17.5mv
13 15.3mv
14 0v
15 0v
16 2.1mv
17 0v
18 0v
19 0.6mv
20 0v
21 0v
22 0v
23 1.5mv
24 21.3mv'
OK, you count the pin wrong because pin 2 is N.C. (NO CONNECTION) and you are getting 5.2VDC.
Pin 3 id the STBY5.2VDC and you are getting 0.
Pin 1 is the PS-ON pin which is the turn on command signal from the main board and you are showing 0VDC.
Please take the readings again and please put the pin names next to the readings so I do not have flip back and forth between your readings and the pictures of the pin names.
The connector is arranged in ODD and EVEN row.

[lesnajair]

Re: Samsung LE52F96BDX Clicking...

Hi. Thanks budm for your reply.
I hope this is what is required. Have taken another look and the results are as follows with my readings at end of each line;

CNM802 to Inverter
1 120v 120V
2 120v 120V
3 120v 120V
4 120v 120V
5 N.C. 0.6mV
6 RTN GND 0V
7 RTN GND 0V
8 RTN GND 0V
9 12V 12.1/1.6 with click
10 RTN GND 0V
11 N.C. 7.5mV
12 BL ON/OFF 0V
13 Analog Dimmimg 5.4 to 6.4mV (stepping up and then down slowly)
14 PWM Dimming 10.1mV

CNM804 to mainboard;
1 Power on/off 0V
2 N/C (Auto-V) 15.5mV
3 St-By 5.2V 5.2V
4 GND-ST 5.2V 0V
5 GND-18V Sound 0V
6 GND-18V Sound 0V
7 18V Amp 4.9mV
8 18V Sound 2.1mV
9 GND 5.3V 0V
10 GND 5.3V 0V
11 GND 5.3V 0V
12 GND 5.3V 0V
13 5.3V 1.1mV
14 5.3V 0.6mV
15 5.3V 0.7mV
16 5.3V 0.5mV
17 GND-12V 0V
18 GND-12V 0V
19 12V 2.3mV
20 GND-12V 0V
21 12V 2.3mV
22 12V 1.5mV
23 N.C. (Fan-On) 17.5mV
24 N.C. (Fan-Det) 21.3mV

Thanks again for taking a look.

Les