Sony KDL-32L5000 No Power

[Spitz]

Picked up a sony with no power symptom, thought it might be a bad power supply. Caps look good so I checked the power supply by itself by jumping the ps-on signal. All voltages are there. Is this a main board problem or can the t-con board cause this.

[budm]

Re: Sony KDL-32L5000 No Power

You can start with this:
https://www.badcaps.net/forum/showthread.php?t=39740

[nuala]

Re: Sony KDL-32L5000 No Power

No secondary voltages and no 3.5v standby. Unplugged h2 module, leds, ir receiver and 3.5v came up. Found c9101 shorted on h2 board.10mfd/10v smd. Also check c9113 t

[Spitz]

Re: Sony KDL-32L5000 No Power

Picked up a sony with no power symptom, thought it might be a bad power supply. Caps look good so I checked the power supply by itself by jumping the ps-on signal. All voltages are there. Is this a main board problem or can the t-con board cause this.

Have since replaced the main board and still nothing.

[patrax]

Re: Sony KDL-32L5000 No Power

Would love to know if anyone ever found a resolve for this symptom, I also have all voltages 24v,3.3v and unregulated 12v and 15v and led's are on,still not getting any backlights. Power button does nothing. After set sits unplugged for sometime all 3 front panel led's stay on. One click from psu during plug in clicks once when unplugged.Sony training manual flow charts in circles? Another stumper I don't want to replace all three boards on. Also unplugging H2 has no effect. Help!

[budm]

Re: Sony KDL-32L5000 No Power

The OP never upload the pictures as requested in post 2.

[Spitz]

Re: Sony KDL-32L5000 No Power

Would love to know if anyone ever found a resolve for this symptom, I also have all voltages 24v,3.3v and unregulated 12v and 15v and led's are on,still not getting any backlights. Power button does nothing. After set sits unplugged for sometime all 3 front panel led's stay on. One click from psu during plug in clicks once when unplugged.Sony training manual flow charts in circles? Another stumper I don't want to replace all three boards on. Also unplugging H2 has no effect. Help!

The first main board was bad, ordered a second and the tv is working. Still have one problem though. If left plugged in, will not always start, but if you unplug it for awhile, then it starts right up. Suspect a capacitor on the power board. When plugged in you can hear the relay click, if it stays energized then it will work. If you hear the relay click and release, then it will not start.

[Newbie62]

Re: Sony KDL-32L5000 No Power

I also have this same tv that has no front lights. with everything plugged in I hear the relay click on then off when given power, with all of the boards disconnected however the relay does not click.
With all of the boards disconnected the voltages from the power supply to the main board are 3.37 on STBY. & 3.39 UNREG 15V.
With the main board connected ( and everything plugged into that ) I get .8 volts on UNREG 15V BUT NOTHING ON 3.3V and that voltage drops to zero.
I HAVE TWO POWER SUPPLY'S AND TWO MAIN BOARDS and the results are the same.
I have already done the individual board elimination test.
Did I get a bad main board twice?

[dick_barton]

Re: Sony KDL-32L5000 No Power

Service manual

[budm]

Re: Sony KDL-32L5000 No Power

See post 2.
OP did not do as requested, I hope you are not going to be doing the same thing.

[Newbie62]

Re: Sony KDL-32L5000 No Power

Thanks budm but that is no help figuring out why I have no 12v on either power supply.
I already have that document.

[budm]

Re: Sony KDL-32L5000 No Power

Well, lets see now , I do not have the TV, the boards in front of me to look at so I have no idea which boards or boards version/revision being used in YOUR TV, you can have same model TV number but the boards, the LCD panel, etc. can be made by more than one OEM.
If you bother to do some research you will see how many versions of the boards are used in the KDL-32L5000.
http://www.shopjimmy.com/catalogsear...ny+KDL-32L5000
Sorry, I will just skip this thread and good luck with your repair.

[Newbie62]

Re: Sony KDL-32L5000 No Power

Haha you are correct !
Power Supply # APS-243/C(CH)
147416341-
090Z155402-A

Main Board #
S022MAD
S8106-1
48.71I01.011
Sorry I don't know how to upload photos.

[Malachi]

Re: Sony KDL-32L5000 No Power

Hit post reply, then go down to manage attachments.

[Newbie62]

Re: Sony KDL-32L5000 No Power

IMG 1877 Power Supply
IMG 1876 Main Board

[vinceroger69]

Re: Sony KDL-32L5000 No Power

Thanks for updating the thread with pictures etc could you also if possible re connect all the wires and then test the voltages on the two white connectors on the power board if you can right down the marking on the pcb ie 5vstby- measures 5.00 volts etc do this for each pin on the connectors so we can see what each pin does what the voltages should be and are now measuring many thanks

are you using your original boards again now for fault finding?

[dick_barton]

Re: Sony KDL-32L5000 No Power

Connect pin1 to pin3 on CN6201 (Power On to STBY3.3) with the power supply disconnected from the main board and check that the 12V & 15V come up.

[Newbie62]

Re: Sony KDL-32L5000 No Power

Hey Dick Barton
Thank You so very much for your help!
OK here we go with the voltages:
Pin #
1 (P ON ) = 3.40
2 ( AC DET ) = 3.36
3 ( 3.3V STBY. ) = 3.40
4 THRU 10 = ZERO
11 THRU 13 = 12.21

[dick_barton]

Re: Sony KDL-32L5000 No Power

Please can you post a well focus picture as in post #18 since I cannot make out what the legends are alongside the connector so can't tell you if all the readings are good.

You don't list 15V so I suspect that's what's missing so check your diodes, any smd fuse close-by any bulged capacitors or any burnt resistors.

[dick_barton]

Re: Sony KDL-32L5000 No Power

There's literally just a handful of discrete components to provide the 15V which is missing and I suspect R6416 may have gone O/C. The 12V is up and running so the DC-DC inverer circuit is working. There's not much left to check out. D6401, C6403 and finally but highly unlikely to lose the supply, R6413/5