Phillips 42PFL5432D/37 Chirping and No Picture

[tw1ztid]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

http://parts.digikey.com/1/parts/419...007-e3-54.html

UF4007 What he meant?

Edit: Also would the standard 1N4007 work for it? (JW)
http://parts.digikey.com/1/parts/719...-p6ke120a.html

This is currently in it.

[retiredcaps]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

UF4007 What he meant?

I'll let tom66 clarify what he meant because I'm no mind reader. He is in the UK so he is probably sleeping now.

BTW, all those parts list selected above require a minimum order in the 1000s.

[tw1ztid]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

I'll let tom66 clarify what he meant because I'm no mind reader. He is in the UK so he is probably sleeping now.

BTW, all those parts list selected above require a minimum order in the 1000s.

lol I noticed. I found the single order equivalents.

Thanks for all your help.

[Mr Bill]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

http://search.digikey.com/us/en/prod...ACT-ND/2770358 This is what we ordered.

I "think" tom was referring to if you do the radio shack diode to see if it works.

[tw1ztid]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

They have no FR or UF at radioshack, they don't even carry the 1N4007. Mainly 4005 and numbers a little lower.. If any of those would be safe i'd be willing to try. I'm looking forward to hooking it up!

[Mr Bill]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

They have no FR or UF at radioshack, they don't even carry the 1N4007. Mainly 4005 and numbers a little lower.. If any of those would be safe i'd be willing to try. I'm looking forward to hooking it up!

http://www.radioshack.com/product/in...ductId=2062575
This is what he got. Its not correct but truth be told he used the tv until the correct digikey ones were delivered.

[tw1ztid]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

It works beautifully!

[casiasjs]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

My wifes friend was throwing this TV away did every thing you have suggested and it works wonderfull. New TV for $13.00 GOOD JOB.

[Jimbo1066]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

My Philips did the same thing and thanks to y'all's help it is back up and running. I'm using the Radio Shack diodes; is there any long term risk if I keep those in?

http://www.radioshack.com/product/in...ductId=2062575

[ben7]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

Wow, I am surprised this is working, you guys decided to replace ZENER diodes with regular diodes? They are marked ZD not D on the board, so must be zener diodes. Or am I missing something?

-Ben

[dudubox]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

Just make sure it has a diode check function for it. I'm sure even the cheapest multimeters should have that function. I pulled up my photos from my cousins power supply and the 2 diodes we changed we ZD902 & ZD904

Thanks so much. I have a Philips 42pfl5432d/37b with the same problem, and after I changed the 4 caps and only one diode and the tv is back working like a charm!

[anagy]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

Do you have a pn# of the two diodes you replaced?

[Mr Bill]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

P6ke120a

[chief0x]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

Having the same problem, chirping, same model. I notice the three caps are bulged. Tested digital multimeter on the diodes. They all ring solid continuity, readings are:
ZD904: .025
ZD902: .021
D925: .046
D912: .000
Those readings are inside the circuit. I have not desoldered.
I believe if I replace the three caps (1500 uF 36V), it would bring the TV to life.

Also notice in the images below: The 3 bulged caps, and burn marks near ZD904 and ZD902.

What do you guys here suggest? Anything else?

[chief0x]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

I see you listed the 3 capacitors that needed replaced, with new model numbers and a link on newark.com to buy them. I need those, my question is, where did you get the diodes from? The ones that are bad, I have ZD904, ZD902, D925, and D912. My fuses are showing continuity so I guess those are fine. Also, was there anything else that needed replaced? The fourth capacitor, which is smaller, appears to be fine. I haven't tested my three large caps, but they are obviously bulging. C951, C952, and C953.

[chief0x]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

ZD904: .025
ZD902: .021
D925: .046
D912: .000

I forgot to add, these readings were both directions, so I'm suggesting these are bad, right? They seem to be open, and not block directionally which a normal diode would read 0L one direction.

[tom66]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

I forgot to add, these readings were both directions, so I'm suggesting these are bad, right? They seem to be open, and not block directionally which a normal diode would read 0L one direction.

All are dead, completely shorted.

[chief0x]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

Take a real close look at the two diodes i put the box around. My cousin has a philips 37PFL5332D/37 that died. The 3 caps were bloated. We changed them and the tv started chirping. The light on the front lit up solid just like you describe but we didn't get a display. The chirp noise was a first long screech followed by shorter chirps until we turned it off. The noise was also coming from the transformer area next to the 2 diodes.

The 2 diodes are the same and from your picture the one closest to the transformer looks different compared to the other on right next to it.

If you can post a good zoom in of that area and if you have a multimeter check them to see if they are open/shorted.

Once we replaced the 2 diodes the tv fired to life and has been working solid ever since.

So you never replaced the bloated capacitors, only the two diodes? My photo is just like yours, they look "cooked" on the board, like a an arc burn or something. And also the readings show me on the multimeter that they are blown. Did you have any other blown diodes or bad caps? Also is there a way to test a capacitor with my multimeter?

[chief0x]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

Make sure to use a 600V rated PIV diode or higher. Like 1N4007. Probably has to be fast recovery so FR4007 would be better.

Where can I get the diodes I need for this tv board? They are obviously blown

[Mr Bill]

Re: Phillips 42PFL5432D/37 Chirping and No Picture

In my situation i replaced the 3 bad caps and then i had the chirping noise. ZD902 and ZD904 are known to fail and cause the chirping but i would suggest atleast removing one leg of all 4 suspected diodes and see if they still read shorted.

ZD902 & ZD904 are P6KE120A
Not sure about the other 2 but the service manual should give a part number in the spare parts list.

All the parts can be bought from digikey.com
Shipping starts at around $2.20 for first class US mail if you live in the United States.