Re: A guide to fixing/troubleshooting some common plasma TV problems
You can do a search on ShopJimmy.com to see if any substitutes are available.
You can do a search on ShopJimmy.com to see if any substitutes are available.
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Re: A guide to fixing/troubleshooting some common plasma TV problems
I replaced one fuse on it and same issue.Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
You may have a faulty Y-Sus if the fuse blew. Here's what I'd do:
(1) Check all Y-Sus and Z-Sus fuses.
(2) Check all standard panel voltages:
Power supply: VS and VA
Y-Sus: VSC and -Vy
Z-Sus: Vzb (aka Zbias)
Edit:
If you're unsure how to do the voltage checks, I can diagram them for you tonight. Also, there are lots of threads that mention the voltage checks specifically for LG-based TVs like yours.Last edited by capkid; 10-31-2013, 03:04 PM.Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
Yes, please do. I would much appreciate the diagram and I will check, I appreciate all the help. I'll stand by on ordering a z- sus board.
Thanks
Jason.Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
Ok, here you go. The voltage checks are listed on the pictures I've attached. The black and red arrows denote the black and red probes. If there is no black arrow included for a test point, that means your black probe should be placed on chassis ground (a metal part of the back of the TV is fine). Post a pic of the panel label that lists the voltages so we can help you compare your readings to the label.Attached Filesif you find these attachements useful please consider making a small donation to the site
Last edited by capkid; 10-31-2013, 09:46 PM.Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
Tom. this is a great help. Thank you for taking the time to break it down..Although I do have a problem with a set that i am working on, that is real similiar to your posts.. I have a 50pfp5332d/37 and it came to me with sound and no picture. Normally i would do a little testing and then replace the x or y sustain boards.. Although I have been working to become more confident in component level repair. So guys with this being said voltages were a little off and i was thinking that something was dragging them down or bumping them up. so i've checked all fuses including the thru-hole and sm ..All fuses are good, so i was looking at the ysus and noticed that the voltage on the lower half was gone and like 1/2 of what things should have been.. Then I notice a mosfet or power ic 7 leg MR4720 is the part number marking and a pin is burned in half. so I have ordered a couple of them, only available from hong kong, and am waiting to see if this fixes the set.. I guess my question is DO YOU THINK SOMETHING OTHER THAN THIS PART CAUSED IT TO FAIL? I iwll let you know once that part arrives abd soldered in. Is there anything else I should look for? I will post a pic of the part and the location on the board tomorrow. thanks again jamieComment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
Will do in the Am. Thank you. I appreciate the help !Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
vinceroger69, thanks for the link there is some really good inforamtion here. thanks again..If anyone knows where i can get ccfl replacement tubes for sharp lc6554u sharp 65" i need ccfl. also if there is a way to trick the set into thinking it has the bulb please post or nessage me. I have one bad ccfl in the set and have moved it to the bottom of the screem but cant find a replacement and have a huge tv taking up space in repair area due to bad bulb..thanks jamieComment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
Ok here are the pics of voltageAttached Filesif you find these attachements useful please consider making a small donation to the site
Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
I changed the fuse that was blown on the toshiba and has not blown since, whst is the more complex issue?Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
I would do the voltage checks to establish a baseline then worry about other possibilities afterwards.Comment
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Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
Ok this is what I got
Vs-172.9
Va-55.4
VZb-.60
Vsc 1.26-9.94 fluctuated between these numbers
-Vy .7-1.5 fluctuated between these
Hope this helps us trouble shootComment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
Your Vs is really low - unlikely to be your problem but do adjust it later.
-Vy and Vsc are faulty which indicates a Y-sustain fault.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
Agree with Tom. The Vzb is also low or not measured correctly. It should be 100V. When the fuse on the Y-Sus blows, it's usually an indication that the large IC under the big heat sink has shorted.
Video: http://www.youtube.com/watch?v=Y8MNQYXw8E0&sns=emLast edited by capkid; 11-01-2013, 03:21 PM.Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
Good catch didn't see that.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
So not the z-sustain board. ?Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
At a minimum, your Y-Sus is bad. Your Z-Sus may also have issues if the Vzb voltage reading you posted is accurate. Typically, the recommendation is to replace the large IC on BOTH boards at the same time.Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
Ok Tom, here are the pics of the back of my TV. To refresh, it is an LG. Model no. RU42PZ61. I have located the place to send the board for repair, but need to know which part I am supposed to remove.
http://www.ebay.com/itm/6871QCH038A-...item2a22d26aa4
So here is a pic of inside. This is with the small access panel removed. Do I have to remove the entire back or just the smaller access panel? How do I know which part I am after?Attached Filesif you find these attachements useful please consider making a small donation to the site
Trying to fix my: LG Model no. RU42PZ61Comment
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Re: A guide to fixing/troubleshooting some common plasma TV problems
Here are some more pics.Attached Filesif you find these attachements useful please consider making a small donation to the site
Trying to fix my: LG Model no. RU42PZ61Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
All left and right refers to looking from rear of TV (or looking from front with TV upside down)
- TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
- Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
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Hi,
I have this almost brand new Plasma was well stored. I would like to repair it for a friend of mine.
I have noticed that it works for few seconds then switches Off the Power_ On signal. Have disconnected boards and left maion board and power supply and still the same. The power supply with PS_ON and VA signals On stays on so it is not a problem in the power supply.
Any one met this problem in the past?...10-08-2025, 07:34 AM
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