Philips Plasma 50PFP5332D/37

[Xsoldier416]

So I have a broken plasma and I haven't quite figured out what's exactly wrong with it just yet. I followed a lot of the tips on Tom66's plasma fix-it guide and that has been informative if not helpful in learning things for future reference, I just haven't located the specific problem.

To update on what I've checked thus far:
1. I replaced the capacitors on the power board (almost all of them except the very large ones).
2. I have tried all the various configurations of components plugged in and not plugged in through the power board.
Through it all the relays click very steadily and nothing comes on. I am going to the store to grab some 400ohm resistors as per Tom's direction, but any other thoughts are of course welcome. Thanks.

[tom66]

Re: Philips Plasma 50PFP5332D/37

Can you please post pictures of the chassis and of each large board in the set.

[Xsoldier416]

Re: Philips Plasma 50PFP5332D/37

Here are the pictures of the boards and full back. I was unfortunately working with limited light sources, so if they're too dark or just not good enough in general I can bring in a couple more lamps and try again.

[tom66]

Re: Philips Plasma 50PFP5332D/37

Please try powering on set with these unplugged
https://www.badcaps.net/forum/attach...9&d=1372211941
https://www.badcaps.net/forum/attach...8&d=1372211941

[Xsoldier416]

Re: Philips Plasma 50PFP5332D/37

Both side boards are unplugged but the TV does not turn on. It just keeps clicking. With every click an LED on the main board, control board, and the little board right next the the main board, flash:
https://www.badcaps.net/forum/images/attach/jpg.gif

[tom66]

Re: Philips Plasma 50PFP5332D/37

OK, can you measure the voltages on the connectors going from the power supply to the main board? Maybe some of the rails are not coming up.

[Xsoldier416]

Re: Philips Plasma 50PFP5332D/37

I do not have a multimeter. All I could find was a basic voltage indicator.

[tom66]

Re: Philips Plasma 50PFP5332D/37

You will need a digital multimeter to repair TVs. You can buy one for around $10 from many retail shops.

[Xsoldier416]

Re: Philips Plasma 50PFP5332D/37

So I've had the DMM for a few days now and I just sat down to test the pins from the power to the main, but I can't see a good place to touch both sides from?

[tom66]

Re: Philips Plasma 50PFP5332D/37

Black probe on chassis, red pin on each pin.

[Xsoldier416]

Re: Philips Plasma 50PFP5332D/37

For voltages starting with the first connector (1M02):
pin 7 - fluctuates between -2.5 and -3.6 mV
pin 6 - 17.28 V
pin 5 - 17.28 V
pin 4 - fluctuates between -.5 and -.9 mV
pin 3 - fluctuates between -.6 and -1.0 mV
pin 2 - -17.21 V
pin 1 - -17.21 V

Second connector (1M03):
NOTE: When this connector is unplugged the relays click faster.
pin 10 - NC
pin 9 - It says there should be no connection, but there is a wire there and it ramps up from 0 to 200 mV and then reverts back.
pin 8 - there's no wire although the board says that it should be DC_PROT
pin 7 - fluctuates with the speed of the relays from 0 to 2.5 V or so
pin 6 - NC
pin 5 - no wire, board says 5Vsw
pin 4 - fluctuates from -1.4 to -3.4 V
pin 3 - board says NC, but there's a wire and the pin ramps up from 0 to wherever and reverts
pin 2 - 5.31 V (board says 5Vatb)
pin 1 - board says NC, wire in the connector and the pin ramps from 0 and reverts

Third connector (1M46):
NOTE: when this connector is unplugged the control board powers on and stays on. Then when plugged back, while the TV is plugged in, the control board turns off and there are no more relay clicks.
pin 11 - 12.31 V (12Vssb)
pin 10 - NC
pin 9 - 12.31 V (12Vssb)
pin 8 - NC
pin 7 - 5.23 V (5Vatb)
pin 6 - -8.2 V board says GND_SSP, but there's no wire on the connector
pin 5 - 5.17 V (5Vsv) (no wire)
pin 4 - 12.31 V (12Vssb) (no wire)
pin 3 - NC
pin 2 - -7.6 V (GND_SSP)
pin 1 - -7.6 V (GND_SSP)

[Xsoldier416]

Re: Philips Plasma 50PFP5332D/37

Update: After a little more looking, I realized that the large board on the left (https://www.badcaps.net/forum/attach...8&d=1372211941) was not plugged in and after plugging it in, I unplugged the third connector and the screen comes on. That board on the left does make a loud hum though.

[tom66]

Re: Philips Plasma 50PFP5332D/37

The screen glows slightly with that connected? Does the relay keep clicking?

[Xsoldier416]

Re: Philips Plasma 50PFP5332D/37

Starting with all of the boards connected, I unplugged the third connector (1M46) from the Power to the Main. This allows the control board and the far left boards (Ysus?) to power on, and the screen glows. However this means that the Main board is not on as none of the relays or in-board LED's on the Main board are lit.

[tom66]

Re: Philips Plasma 50PFP5332D/37

Sounds like a main board problem, then.

[tom66]

Re: Philips Plasma 50PFP5332D/37

Since this is using a Samsung panel, you can place a jumper across a test point on the control board to enable test patterns. Post a picture of your control board, this connects via LVDS to the main board.

[Xsoldier416]

Re: Philips Plasma 50PFP5332D/37

Here is the control board.

[tom66]

Re: Philips Plasma 50PFP5332D/37

OK, CN2007 is your jumper block. See here:
https://www.badcaps.net/forum/showpo...61&postcount=2

[Xsoldier416]

Re: Philips Plasma 50PFP5332D/37

I soldered a wire between pins 3 and 4, plugged everything in, and turned it on. The relays clicked repeatedly until I unplugged the third connector (1M46) from the power board. At that point the relays clicked once, the control board turned on, there was no power to the main board, the Ysus came on and then the screen started to go through several colors: white, green, red, blue, back to white with a scrolling black horizontally, then black scrolling vertically, and then a weird ripple effect coming from the bottom right hand corner. After all this it repeated. It seems the main board or the real small board right next to the main board is not working properly, creating the repeated clicking, and not allowing anything to turn on. Any thoughts?

[tom66]

Re: Philips Plasma 50PFP5332D/37

That would seem about right; the test pattern rules out the power supply, Y-main, Y-buffers, panel, control board and X-main.