Question about Toshiba 42DPC85 42 in. EDTV-Ready Plasma Television

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Hi, I did a simple test to see if there is power at the fuses, the X-SUS board has one fuse that has no power to it and it is the one that is at the bottom of the board length wise, does this mean that this board is bad??

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The first thing you need to do is to check and see if the VA and VS Voltages are correct. there will be a sticker inside the panel showing what the VA and VS voltages should read. On the power supply the Voltage will be marked by the connectors.

Posted on Oct 16, 2010

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Posted on Jan 02, 2017

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How do I test the y-sustain main board from a philips plasma tv...tv model is 42PF7220A/37 the Y-Main sustain number is LJ92-01200A....both buffers tested bad but now I dont know how to test the y-main...i...


Hi.

As such boards are cheap and fail quite easily (both the two sustain and the buffers) Philips service manuals are more oriented at board swapping then at proper testing. In this particular case the buffer boards fail very easily because of a bad soldering to IC. The short will regularly blow the main sustain board.

To start when a main sustain (e.g. Ysus) is fried the TV will go in protect mode with the led flashing in standby. One test is done disconnecting the Sus board (with power off) and restarting the TV. If TV does not go in protect, then the sustain board was good.

If there is no protection:

The first thing to check on a main sustain board is the fuse. If the fuse has blown the IC is probably fried.I believe fuse is F5004. Check for swollen capacitors that may have blown. Test the FET. That is the core of the board as it is the power amplifier.


Here the service manual:PHILIPS_SM_15540.pdf - Right Click "Save Target As"

Here a more useful service manual. Check and follow troubleshooting diagrams in manual.

Here some troubleshooting from users.

Note:if buffer board was shorted, then the main sustain board is usually faulty.

Regards.

Ginko

Sep 13, 2011 | Philips Televison & Video

2 Answers

My zenith plasma 42w46x tv. doesnt show pic. the sound is there but no pic. I opened it up and founf out the the board on the right side of the tv(looking at it from the back) has two fuses, one of them...


Hi:
This is the X-systain board replace this board and your problem will be solved. The part number can be found on a white sticker some where on the board. Get the number and google it or enter it on E-Bay because alot of shops sell these boards when the get units with bad screens. Or try www.shopjimmy.com for a new board.

Mar 10, 2011 | Televison & Video

2 Answers

Lg 50pc3dhas a sound but no picture


Failure in either of the following can cause no video output.
  1. Display Panel
  2. Y Drive Board
  3. Y SUS Board
  4. Z SUS board
  5. X Drive Boards
  6. Tape Carrier Package (TCP)
  7. Main Board
Try these if you have electronics background :
Note: Touch your fingers repeatedly to a ground connection point or unpainted metal in the product before proceeding.
  1. Unplug the unit.
  2. Remove the back cover by removing the screws holding it.
  3. Disconnect the LVDS cable from the power supply or from the main board. LVDS cable runs from the right bottom of the power supply to the upper left of the main board. Power supply is located at the upper center of the unit and the main board is at the right bottom of the unit.
  4. Plug the unit back and turn it on or the unit turns on automatically.
  5. Look for the Control Board. It is located right at the center of the unit below the power supply. It has a LED on it.
  6. On the Control Board at the right bottom of the MCM chip, the big chip right at the center of the board, you can see two test points. Short across the two test points.
  7. If there appears a picture of cycling colors and patterns, the Y-SUS, Y-Drive, Z-SUS, Power Supply, X-Boards, TCPs and Panel are all OK. The Main Board or the LVDS cable is defective.
  8. Check LVDS cable continuity.
  9. Replace Main Board if LVDS cable is good.
  10. If no picture of cycling colors appeared on step 6, some adjustment is off or some portion of the signal is missing.
  11. Check fuses or continuity of voltage supply lines going to the X Board/s, Y SUS and Y drive Boards and Z SUS Board.
  12. Replace blown fuses, connect broken lines, and resolder loose solders.
  13. If no apparent damage is found, ask for a qualified or experienced technician's service. Massive and sophisticated tests and voltage readings are required and proper tools are needed such as oscilloscope to find which signal is missing. The parts to be tested are prone to handling damage and requires proper handling and testing.

Nov 24, 2009 | LG 50PC3D 50 in. Plasma Television

2 Answers

I have a plasma tv 42 in and I have a black screen. What is wrong?


There are a lot of possibilities. If you could give a lot more detail that would be great. Also how long have you owned the tv? Does the tv turn on at all? is there audio? Does the onscreen menu come on? Once I have more information I can assist you further.
Thanks,
Lee

Nov 05, 2009 | LG RU-42PX10 42 in. HD-Ready Plasma...

1 Answer

Turn on lg 42''plasma tv.get sound but no picture


Failure in either of the following can cause no video output.
  1. Panel
  2. Y Drive Board
  3. Y SUS Board
  4. X Drive Boards
  5. Tape Carrier Package (TCP)
  6. Main Board
Try these if you have electronics background :
Note: Touch your fingers repeatedly to a ground connection point or unpainted metal in the product before proceeding.
  1. Unplug the unit.
  2. Remove the back cover by removing the screws holding it. No need to remove the stand.
  3. Disconnect the LVDS cable from the power supply or from the main board. LVDS cable runs from the right bottom of the power supply to the upper left of the main board. Power supply is located at the upper center of the unit and the main board is at the right bottom of the unit.
  4. Plug the unit back and turn it on or the unit turns on automatically.
  5. Look for the Control Board. It is located right at the center of the unit below the power supply. It has a LED on it.
  6. On the Control Board at the right bottom of the MCM chip, the big chip right at the center of the board, you can see two test points. Short across the two test points.
  7. If there appears a picture of cycling colors and patterns, the Y-SUS, Y-Drive, Z-SUS, Power Supply, X-Boards, TCPs and Panel are all OK. The Main Board or the LVDS cable is defective.
  8. Check LVDS cable continuity.
  9. Replace Main Board if LVDS cable is good.
  10. If no picture of cycling colors appeared on step 6, some adjustment is off or some portion of the signal is missing.
  11. Check fuses or continuity of voltage supply lines going to the X Board/s, Y SUS and Y drive Boards and Z SUS Board.
  12. Replace blown fuses, connect broken lines, and resolder loose solders.
  13. If no apparent damage is found, ask for a qualified or experienced technician's service. Massive and sophisticated tests and voltage readings are required and proper tools are needed such as oscilloscope to find which signal is missing. The parts to be tested are prone to handling damage and requires proper handling and testing.

Oct 28, 2009 | LG 42LC2D 42 in. LCD HDTV

2 Answers

LG 42PX4MVH PLASMA TV - Sound but no picture.


You need the ysus board. This is a very common problem with LG's. If it is coming up with the fuse removed you are essentially removing the short from the power supply so that it can come up and deliver other voltages for sound and all. Check out encompassparts.com if you are going to try to repair this yourself. Thanks

Oct 24, 2009 | LG 42PX5D 42 in. Plasma HDTV

1 Answer

X-sus board replaced year later same pop of death


test the main board next to it- the are usually replaced together sometimes called the scan board-you can check for blown fuses on the x sus and put the back of your hand to the heat sinks- see if they warm up or not (be careful) if they stay cold with set on for several minutes then its dead

Aug 19, 2009 | Televison & Video

1 Answer

LG 42PX5D - y sus board blown?


Hello... Fried devices on the y sus will usually blow the fuse on the y sus. That would explain no fizz. I hope this helps...

Nov 11, 2017 | LG 42PX5D 42 in. Plasma HDTV

2 Answers

Bush pdp42tv006 4amp fuse blown . not the main fuse.checked for shorts .any help? thanks


pls check the main power supply<regulator> hang the loads going to secondary supply,

Apr 29, 2008 | Televison & Video

6 Answers

My LG Plasma TV RU42PX10C


Hi all..i had the same problem with my 42 inch LG
rz42px11. its a faulty zsus board(Z sustain part no 6871QZH033A) the pop
sound was the fuse on the board blowing.not that hard to replace but be careful with the connector ribbons! got my replacement from
https://www.chsinteractive.co.uk/ £150....expensive,but probably cheaper than
calling someone out to fix it.
P.S i tried just to replace the fuse on the board T2AH 250v but it blew,i think the fact the fuse blows means the board is faulty..but you could try.
hope this helps someone.
Good Luck

Dec 21, 2007 | LG RU-42PX11 42 in. EDTV-Ready Plasma...

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