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Hi i am trying to find the type of diode in position d260 on a vestel 17ips10-3 power inverter board as used in the Alba lcd3288hd tv.It is a small surface mount diode with [A2] printed on it

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Warf135
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SOURCE: I have Toshiba 15

There are a few things that can cause this fault, but the most common is the High Voltage Capacitors that feed the backlights going bad. The invertor and power supply are on the same board (Vestel 17IPS01-2)

The caps are on the power supply board and are C355 & C356 (12pf 3kv) and C354 (4.7pf 3kv). If you replace these caps it will solve the problem in 99% of cases.

If replacing these three caps do not solve the problem then it may be easier to replace the power supply board... as fixing means replacing a tiny surface mount chip with loads of legs.

WARNING: The Power Supply/Invertor board can contain LETHAL VOLTAGES even when turned off and unplugged. if you are not sure, Pay someone to do it for you!

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Posted on Jan 26, 2011

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On my Hisense 50K23DG LED TV, I have sound but no picture.


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1 Answer

My alba 19inch tv is giving me problems. when I first switch it on you can see the picture and you can hear the sound. After a few seconds the picture disappears and you can only hear the sound.


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should trouble shoot. Contact any service technician. The circuit will differ with models and versions.
Type in the brand name of your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

Apr 30, 2015 | Alba LDVD1538WDCH LCD TV

1 Answer

I can't turn up the brightness on my TV


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should be troubles hooted. Contact any service technician. The circuit will differ with models and versions.
Type in the brand name of your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

Mar 07, 2015 | Alba LDVD1538WDCH LCD TV

1 Answer

Hi i have a alba tv Model number LCD32880HDF afer 10 seccond the display turn off but the sound no what is the problem???


power supply 17ips10-3 v.1,mainboard 17mb45m-2

the power supply has intergrated inverter bit of a pain,no markings for voltages etc,also used in bush,sylvania etc,it has a touch panel on the side for the usual adjustments ,.

these NORMALLY suffer with the inverter output ceramic caps (3kv),on c231 &c230,an insulation test confirmed they were fine,and capacitance was within tolerance,all other lytic caps tested for esr returned good results.

it had all stable voltages ,but no voltage in inverter section??although a fluctuation on the standby voltage was due to the led's flashing in time with the flucuation.

it was hit and miss knowing what voltage goes where,it is a vestal afterall!things seemed fine as a guestamite.

to do component testing in the area of the inverter, from the smpt there are 2 ultra fast recovery diodes in parallel .

checks on these diodes and look for a shorted diode, (d105) a uf5402...

Mar 28, 2014 | Televison & Video

2 Answers

Philips 32PFL3505D/F7 32-Inch LCD HDTV keeps turning off when I turn it on


very common failure on this tv is electrolytic capacitors failing on the power supply, the module that your power cord plugs into. The Caps can appear to have swollen tops, replace with same type or slightly higher working voltage. Observe capacitor polarity when installing new parts. Probably 1000 mfd @ 16V could be 1000mfd @ 25V.
you need soldering skills to repair the parts in question.

Mar 03, 2013 | Philips 32PFL3505D 32 in LCD TV

1 Answer

Tv flickers off and on


Hi,
You have to check the back light inverter of your lcd tv. In all lcd tvs there are back lights to illuminate the pixels. There are two types of back lighting in use . CCFL ( cold cathode fluorescent lamp) and LED (light emitting diode). In you your tv it will be CCFL. If it is CCFL then it need an inverter (voltage step up circuit) for getting its working voltages. Normally it will produce above 1000V in low current. In the inverter circuit there will be inverter transformers. If the winding of the transformer get shorted then the inverter will drain a high current from the power supply. If so then the current sensing circuit senses the same and it will shut down the power supply. That's why it do the cycle ON an OFF repeatedly.
Just check the inverter board. Normally there will be three circuit boards in LCD TV. Mother board, SMPS (switch mode power supply) and inverter board. In some tvs the SMPS and inverter bord will com-pained as one board. you have to check the inverter transformers. there will be 4 or 6 inverter transformers. if available replace the inverter board as a whole.
Also check the electrolytic capacitors in the power supply. if any of the capacitor seems like one that in the picture, then replace the same and then only go for the inverter board



ajin_g_8.jpg ok

May 29, 2011 | LG 42LC2D 42 in. LCD HDTV

5 Answers

Hi. I have an ALBA LCD32880HDF television which I purchased in August 2009 so just outside warrenty. I have been on holiday for a week and had switched the television off at the wall and returned home...


hi all the black screen solution for me was this (this is assuming you have alba brand tvs and have the black screen BUT can still hear the sound) i after much fekkin around with it eventually found the solution in it (its the bloody backlight brightness in the settings you need to turn it from high TO LOW) ....... now this can be a bit tricky because usually when you have the black screen problem if u unplug the tv for a few hours and plug it back in you only get or should get probably like 30-1min of picture time before the picture goes black so u have to be reallllly fast with the menu button to get into settings before the picture dies (i learned the sequence for my alba lcd32880hdf) it was the following (for this part use the remotes arrows the one with the ok button usually in the centre of them) turn the tv on then click menu then press the up key 2 times then press ok then use the right arrow/button twice (although u cant see what ur doing ur navigating the menu hehe) then press the down arrow/button seven times before finally pressing the left arrow/button (once) <-- (now this bit may need to be done twice if you can remember setting ur backlight to max use it twice it will put it on minimum if in doubt only press it the once remember to totally power the tv off before repeating the steps to reset menus default posistions) remember thats the solution i found for my tv stands to reason (since i did infact buy another tv same brand different model which got the same problem) that this could be a solution for all alba tv users try it worked for me 2 times if ur not sure of the menu look up you tv models menu navigation online to find out the buttons you press gl hopefully it works for you too

Oct 24, 2010 | Televison & Video

1 Answer

I have Toshiba 15" lcd tv with vestel 17ips01-2 psu/inverter board.the tv will show a picture for a couple of seconds and then the inverter cuts out.


There are a few things that can cause this fault, but the most common is the High Voltage Capacitors that feed the backlights going bad. The invertor and power supply are on the same board (Vestel 17IPS01-2)

The caps are on the power supply board and are C355 & C356 (12pf 3kv) and C354 (4.7pf 3kv). If you replace these caps it will solve the problem in 99% of cases.

If replacing these three caps do not solve the problem then it may be easier to replace the power supply board... as fixing means replacing a tiny surface mount chip with loads of legs.

WARNING: The Power Supply/Invertor board can contain LETHAL VOLTAGES even when turned off and unplugged. if you are not sure, Pay someone to do it for you!

_572.jpg

Aug 13, 2009 | RCA Mikomi 5290925 15 in. LCD TV

2 Answers

Tv keep going on standby when you turn it on


tv goes into standby all the time if a power supply is not fine, what happens is that a power supply produces two voltages, one small one powers a standby components and bigger voltage powers a line transformer which later produces more small voltages,
then later cancels the first small voltage.

chec your power supply semi conductors like, transistors, diodes and small value resistors, on your power supply. some power supply uses a IC to oscillate a ht. so check a supply at a w/shop.

Feb 07, 2009 | Goodmans 257NS 20" TV

2 Answers

Wharfedale lcd2010a


The TV is Manufactured by a company called Vestel in Turkey and will operate on the AK45 chassis remote control,if you try the codes for Bush or Alba one will operate it nut not of course menu functions but no problem there is a menu button on the side of the set.
audiovservices@fsmail.net

Apr 18, 2008 | Televison & Video

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