Philips 42pfp5532d 05

[badcaphunter]

I was given this plasma yesterday upon investigation i noticed some bloated caps on the PSU, i have changed a few(ones that i had in stock) and are waiting for a few more to be delivered. when i press the standby i hear a relay click but it sounds as if it clicks back off really fast. i will replace the few remaining caps and report back.

When i press standby i get 2 red blinks from the front and 8 green blinks from one of the psu led's.

Its a Samsung panel and PSU and Philips mainboard, i will post board numbers etc when i change the caps.

Thanks for help guys

[ReeceyBurger123]

Re: Philips 42pfp5532d 05

Do you get Vsus voltages ? Also the standby cap is failed if this goes 5vstby goes low and the Tv wont start so its probably just the caps.

[badcaphunter]

Re: Philips 42pfp5532d 05

Ok so i got some more board numbers here

PSU is Samsung PS-507-PHN PCB Code LJ41-05253A

Mainboard is Philips 3139 123 62614 wk713.5

Y Main is Samsung 42HD W2 Plus, PCB No LJ41-05134A, Rev R1.6 (07/07/2015)

X Main is Samsung 42HD Plus, PCB No LJ41- 05133A, Rev R1.5 (07/07/2015)

That is all i got for now, I noticed on the legend 8 green blinks indicates a thermal issue? i cant seem to find any thermistors but i cant find a service manual or schematic to locate it.

I am quite a noob at this (only been doing TV repair as a hobby for a couple of years, did washing machines and PC/Laptops previously so please bear with me and thanks for your patience.

I got this TV off a guy who had another LG 42" plasma and as part payment for fixing his LG (Bloated caps on the primary side) he gave me this set.

[badcaphunter]

Re: Philips 42pfp5532d 05

Hey Reecey i dont get any voltages as the PSU shutsdown with thermal error with all plugs detached.

Thanks again

[badcaphunter]

Re: Philips 42pfp5532d 05

ok so i managed to change all the bad caps out but i'm getting 8 green blinks from the PSU led relating to (Thermal) not sure where to start, i tried the old hair dryer and freeze tricks to no avail. there are a few large green discs similar to ceramic capacitors but bigger, can they have some sort of thermal sensor in them?

I watched a video about this PSU and it should have no blinks just a solid green light with all cables unplugged so this Power Supply is bad and i cant find a schematic anywhere.

[badcaphunter]

Re: Philips 42pfp5532d 05

Does anyone know where the thermistor is located on this board and what it looks like, thanks

[ReeceyBurger123]

Re: Philips 42pfp5532d 05

What caps have you changed first ? Got images of it ?

[badcaphunter]

Re: Philips 42pfp5532d 05

Hi i have replaced all the listed caps, i also removed 3 transformers looking for this dreaded thermal fuse, i thought it would be on the underside just under the tape on the transformer but i could not find one. where it says jumper on the pic i have placed a jump to bypass the error, when i bypass this i get a solid green light as i should but when i press standby i get a relay click and then 4 seconds later i get another relay click the 2 red flashes from the standby light indicating 12v rail missing so i'm thinking this thermal error code has something to do with the 12v transformer.

If u look at the 2 relays top centre of the board there is 2 green disc shaped components that look a bit iffy there labled TX8001 and TX8002, can these have thermal fuses in?

[badcaphunter]

Re: Philips 42pfp5532d 05

I just got zapped fromtouching the heatsink on the PSU when trying to power on the tv, luckily i wasnt touching anything else but is that normal for power to run through the heatsinks?

I'm getting -135v on the 3 heatsinks on the left "hot side" when the relay clicks then it clicks back off and i get 0v.

[ReeceyBurger123]

Re: Philips 42pfp5532d 05

Thats normal for the some heatsinks to be live, so does Vs come up then it drops out ?

[cliff_hootarski]

Re: Philips 42pfp5532d 05

Zapped.....Those that have....and....Those that will.

[budm]

Re: Philips 42pfp5532d 05

BTW, just for info, when making Voltage measurement in the hot side, do not use chassis GND for the GND ref. for the meter, and I always plug the unit I am working on into Isolation transformer or at least use the GFCI outlets.

[dick_barton]

Re: Philips 42pfp5532d 05

Tom has a service manual for the set.
http://www.toms-service-manuals.com/...ilips-Magnavox

[badcaphunter]

Re: Philips 42pfp5532d 05

I have had a look but cant find a schematic for the psu.

Thanks for the info budm, i dont seem to learn from my mistakes... Its not the first time

[dick_barton]

Re: Philips 42pfp5532d 05

If u look at the 2 relays top centre of the board there is 2 green disc shaped components that look a bit iffy there labled TX8001 and TX8002, can these have thermal fuses in?

Theres a ceramic resistor 5W on the PSU. I can't read the full number off the image. Check out the part number since some of these have thermal fuses integrated within them.

Edit
There appear to be several other large ceramic resistors on the board that could be similar to the one I mentioned above.

[badcaphunter]

Re: Philips 42pfp5532d 05

I think i may have found the culprit, i found a funny looking thing screwed into one of the heat sinks. thanks for help guys i really do appreciate it.

Lots of pics

[dick_barton]

Re: Philips 42pfp5532d 05

Good find. Hope you have found the problem. A picture of where that is located on the board could prove useful to others.

[ReeceyBurger123]

Re: Philips 42pfp5532d 05

Thats the thermistor, see what resistance you have across it. Then heat and see if the resistance lowers if so its good. If ots O/C its failed.

[ReeceyBurger123]

Re: Philips 42pfp5532d 05

Also Im going to have to pull you up on something here, you have not replaced all the secondary caps. The Samwha Wl and Wb series are defective so I suggest you replace them before you seal the Tv up:

[badcaphunter]

Re: Philips 42pfp5532d 05

This thermistor is reading .067 on 2k ohms when i heat it up no change. i have got some more caps on order so i will sort that asap.
I dont really know if this is good or not?

Is there any way i could bridge it with a resistor just to check if the set works, i dont even know if the screen is good.


That's where it is located and thanks again.