Philips 50pfp5332d/37 power supply

[ryan74]

I got this tv and the person said it had the 6 blink code. I did not verify this.
he opened the back but claimed he didn't try to fix it.
First thing I noticed was power supply board was only screwed down with 2 screws.
Next I found a bad fuse and varistor/thermistor
I took out varistor and there is 122v ac at one solder joint so I assume everything is good to this point.

-The bad varistor has a burn hole and is broken. I need help identifying it or a replacement?(see pic)
-The fuse is labeled Littlefuse f5AL250v. I dont know what the L stands for. Will any 5A 250V do?

the power board # is: RM390174251244
PBA: A
REV: 1

[tom66]

Re: Philips 50pfp5332d/37 power supply

Any 5A fuse will do.

You can temporarily power it up without the varistor to check if there are other faults.

[retiredcaps]

Re: Philips 50pfp5332d/37 power supply

Personally when I see a fuse blown, I would check the bridge rectifier, power mosfets and diodes for shorts before powering up.

[ryan74]

Re: Philips 50pfp5332d/37 power supply

I thought it would power on also but it wont. no stby. no relay click... nothing.
there must be something else bad. The fuse in pic is good but there was no voltage there.
I will have to look closer.

[tom66]

Re: Philips 50pfp5332d/37 power supply

This PSU probably uses SUB-supply, which is run separately from the main relay. Check for a 5V stby output. If there's no such output, then whatever killed the MOV probably took out the standby supply too.

[ryan74]

Re: Philips 50pfp5332d/37 power supply

This PSU probably uses SUB-supply, which is run separately from the main relay. Check for a 5V stby output. If there's no such output, then whatever killed the MOV probably took out the standby supply too.

no 5vstby

[ryan74]

Re: Philips 50pfp5332d/37 power supply

Personally when I see a fuse blown, I would check the bridge rectifier, power mosfets and diodes for shorts before powering up.

I assume you test them all on the board, or would you focus on stby power for now?
There is alot to test if I need to go through them all.

I can't seem to find a schem. of power board. anyone have it? It helps me trace paths.
sticker part #: RM390174251244
board#: PS-506-PH LJ44-00144A 20061129 rev.01

-Edit- I was wondering if this varistor in pic(the blue 1) will be ok replacement?

[DakotaKid]

Re: Philips 50pfp5332d/37 power supply

Service manual for chassis EJ3.0U PA is available at elektrotanya at . 22MB file so too big to upload and post here. You need to go by chassis number when searching for documents on these Philips TV's. I have two of these 50" plasmas on my bench right now (one actually branded Vizio and one Philips) and one of them (Vizio) has similar PS problems that you are describing. The other I am just getting ready to start a new thread on because it is a sustain board problem. I will follow your progress because it should help me with my dead power supply.

btw, this TV uses a lot of Samsung boards and a Sammy plasma panel, at least mine of the same model number does.

[retiredcaps]

Re: Philips 50pfp5332d/37 power supply

I assume you test them all on the board, or would you focus on stby power for now?
There is alot to test if I need to go through them all.

Everyone has different techniques for troubleshooting.

I like to do the in circuit tests first and make reasonably sure that the main culprits for blowing a fuse are checked before I power up.

[ryan74]

Re: Philips 50pfp5332d/37 power supply

Personally when I see a fuse blown, I would check the bridge rectifier, power mosfets and diodes for shorts before powering up.

Bridge rectirier is good. I still have to check power mosets, but there are a few bad diodes.
I marked picture to show what fuse was blown and the bad diodes I found so far.
I still dont think replaceing these parts will get me stby power but im having trouble tracing stby power. I think it is on the upper right side of board but not sure.

[tom66]

Re: Philips 50pfp5332d/37 power supply

There will be a number on the board, 12 digits, e.g. 3138 1586 4961. What is this number?

[ryan74]

Re: Philips 50pfp5332d/37 power supply

I think this is what you want.

sticker part #: RM390174251244
board#: PS-506-PH LJ44-00144A 20061129 rev.01

Also I was looking up the diodes I need and could use a bit of help.
one is: 1N4007 635J
will any of these be ok?
http://www.digikey.com/product-searc...1n4007&stock=1
They all seem to have the same specs but I dont know what the E3/54 or E3/73.

The other is: EM518 BL
Digikey doesn't have it so I need to find a replacement.

the pic shows the area i suspect controls stby.

[ryan74]

Re: Philips 50pfp5332d/37 power supply

So far I came up with these parts with digikey help. I would like confirmation they are correct.

original- 1N4007 635J
http://www.digikey.com/product-detai...GICT-ND/868990

original- EM518 BL
http://www.digikey.com/product-detai...ICT-ND/2880384

original- DSC 20D-15
http://www.digikey.com/scripts/DkSea...=0&y=0&cur=USD
digikey had trouble with this one.

[joehezzer]

Re: Philips 50pfp5332d/37 power supply

i am glad your covering this set, as i have the same unit with slightly different problem

[ryan74]

Re: Philips 50pfp5332d/37 power supply

There will be a number on the board, 12 digits, e.g. 3138 1586 4961. What is this number?

I think I found the number you wanted. 996500044498
http://www.shopjimmy.com/philips-996...upply-unit.htm

this model has chassis EJ3.0U PA

edit- I noticed one of the big caps is different in my pic. The black one matches what shopjimmy has in there pic(Samwha HE (M) 450wv 270uf).
The tall brown one in my pic is Nipon Chemi-con KMM 450v 270uf (M).

[Mark369]

Re: Philips 50pfp5332d/37 power supply

some of the diodes form the bridge.

Check Q8001, Q8015, D8025 and C8008

can we get good pic's of the back of board.

[joehezzer]

Re: Philips 50pfp5332d/37 power supply

I think I found the number you wanted. 996500044498
http://www.shopjimmy.com/philips-996...upply-unit.htm

this model has chassis EJ3.0U PA

edit- I noticed one of the big caps is different in my pic. The black one matches what shopjimmy has in there pic(Samwha HE (M) 450wv 270uf).
The tall brown one in my pic is Nipon Chemi-con KMM 450v 270uf (M).

i replaced both of these caps i had to get them from china though
you can see they both had been leaking





this is the link on ebay if its any good to you

http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=160966248387

[ryan74]

Re: Philips 50pfp5332d/37 power supply

some of the diodes form the bridge.
Check Q8001, Q8015, D8025 and C8008

I think I tested them ok except c8008. This is the tall cap that must have been replaced. It(Nipon Chemi-con KMM 450v 270uf (M)) measured 239.9uf.
The other measured 261.3uf.

I might as well replace them both. it is a tight space and may fit up to 32mm dia.. Here is the original datasheet.
Samwha HE (M) 450wv 270uf
https://cdn.badcaps-static.com/pdfs/...ab7d46906e.pdf
Is this a good replacement?
http://www.digikey.com/scripts/dksea...=13995&stock=1
I dont want to wait 3 weeks.

I have been watching this also. I think it would work. my panel says 50W2 and the details say 50HDW2.
http://www.ebay.com/itm/SAMSUNG-Powe...torefresh=true

[ryan74]

Re: Philips 50pfp5332d/37 power supply

I got the power supply running after replacing a bunch of parts. Including a bunch of smaller caps.
http://www.digikey.com/product-detai...203-ND/1190978
http://www.digikey.com/product-detai...1813-ND/483409
http://www.digikey.com/product-detai...GICT-ND/868990
http://www.digikey.com/product-detai...ICT-ND/2880384
http://www.digikey.com/product-searc...ds=IXKH20N60C5
http://www.digikey.com/scripts/DkSea...22N60P&cur=USD
I have no idea if I picked the right parts so I will have to run it a long time.

Now I may have another problem, Im not sure. In the pics below I still have a steady flashing led. Is the flashing led a fault?
Right now Iam checking menu and programing channels. Seems fine so far.

Edit- Just completed software update and so far so good.

[DakotaKid]

Re: Philips 50pfp5332d/37 power supply

I believe that board is supposed to have a steady flashing LED when it is operating properly. As long as none of the other LEDs is flashing an error code that one should be okay. When mine was operating ok, that LED flashed steadily, about once a second.

I need to pull my PS to troubleshoot it. I know my Y buffer is toasted.