Question about Spectroniq PLTV3250 32 in. LCD TV

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I am currently repairing an onn lcd 32 angel-a with the standby fault, how would you recommend repair without changing main board?

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Check for buldging caps. Burn marks and discolorations around the components. I have found newer caps are failing around the bottom instead of bursting the tops. Check the voltages out to the mainboard to make sure they are where they should be. Another thing to do is reflow the solder on fets, transformers anything that looks broken, you can use a jewlers glass to check for these cracks.

Posted on May 31, 2010

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Posted on Jan 02, 2017

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If blinks continue without any pause, the main board is faulty.
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Having same problem where TV standby light comes on and logo appears momentarily then TV does not come on fully (backlight it on slightly).


Hello
You have to troubleshoot from its backlight inverter board itself. That is the first possible cause tho this fault to LCD TVs. If backlight inverter board have shorted inverter transormer [wnding short], the inverter board will take tremendous current from power supply, and this can lead to a momentory logo display and then shut down. The second possiblility is with its main digital board. In both cases, the respective board should be replaced as card basis, as there is no repair to these boards.

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The best way to repair this problem is to replace the main signal board. The HDMI connections on the board may of come loose but replacing the board is the best solution at this point.

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1 Answer

I have lg 32 in lcd tv cannot get it off standby from remote or tv itself


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did you see the standby light? if no you have problem in main power section maybe the fuse is blown you can locate the fuse at the power main board, or if the standby light is light up the problem is the inverter power supply and this section is need to diagnose to find the defective parts...

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1 Answer

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Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://homenol.blogspot.com/
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts...

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BUSH IDLCD27TV006


http://www.chsinteractive.co.uk/pdf_data/KT02.pdf

Order Code….. KT02
POWER SUPPLY REPAIR KIT
BUSH MAXIM 1157 1154 Medion
Goodmans (Standard) 04TA069I 05TA71B 05TA071C
A standard power supply repair kit for faults attributed to the standby +5v rail.
BUSH IDLCD27TV006.
MAXIM 1154, 1157.
MEDION MD30112.
GOODMANS IDLCD27TV006.
The numbers off the boards will read: 04TA069I 26” 27” 30” 32”
& 05TA71B, 05TA071C.
LCD TV POWER SUPPLY PROFILO-TELRA.
Please check the primary of TR20 before fitting the kit.
Primary windings should read approx 2.700mH / 4.00 Ohm.
We recommend all kits are fitted by qualified engineers
We accept no responsibility for loss, injury or damage caused by your use of this kit as a successful repair
depends on your own skill and fault finding ability.


Circuit Reference
Loc Description
F300 T3.15A FUSE
IC21 FSD200
IC30 ICE1QS01
D315 12V ZENER
D318 2V4 ZENER
Q300 BC337
Q302 BC848C SMD
D325 1N4007
C213 33UF
C322 47UF
C356 47UF
C330 1000UF
LINK (IF NEEDED)












Oct 31, 2008 | Televison & Video

2 Answers

TV & Tuner stays in Standby mode


Assuming you have tried changing batteries in your remote and any front panel power switch your set has, the main power supply is probably at fault and without some technical background and a couple of test instruments, you will not be able to do the repair yourself.  What you can do though is; unplug the set, let it stand overnight or at least several hours, remove the back panel and look for a separate board with mostly larger components on it; it will have a ferrite core transformer on it and several larger capacitors which are cylindrical and mounted vertically to the board.
 
Before touching anything inside, especially on that board, allow several hours to be safe since the larger capacitors can hold a painful voltage charge for some hours.  
 
If you see signs of overheating such as discoloration of the board material, it may not be repairable but if you can find a part number on the board, you might be able to buy the power supply and install it yourself.
If there are no signs of heat damage to the board, there may be companies offering to repair it as a subassembly instead of repairing the whole set which could be much more expensive.
If you choose to replace or have it done, the power supply still may not be at fault since most are capable of switching on and off if a downstream problem is causing an overload.
 

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