Question about Samsung HCL4715W 47" Rear Projection Television

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Would you have a list of the different resistiors???

I was looking at your comments on the hcl4715w sets. I was also interested in the biasing resistors. Might you have a list of the resistors I would need as well to save on shipping???

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270 Ohm 1/2watt
27K Ohm 1/16 watt
3.3K Ohm 1/8watt
3.9 Ohm 2 watt
150 Ohm 2watt

Posted on Jun 03, 2008

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Denon AVR2106 One output channel shorted and blown. 2 power transistors shorted, emitter resistors and base resistors blown Have replaced all, including bias transistor I think bias is still wrong (no...


I would also replace 2sa992 (2pcs) and 2sc1845 on preamp board- sometimes they look ok when you test them by regular meter. Check 1.2 kOm and 4.7ohm resistors at preamp pcb. Check diodes on output pcb (could be smd type, connected from base of output transistors to emitter i think)

Sep 07, 2011 | Denon Audio Players & Recorders

Tip

Look out for brands and manufacturers


Even if you do not want to comment or display bias, several manufacturers Of Flat-screen TVs are listed in the production of television sets consume Less Energy. For example, philips has won a european geen television of <br /> <br /> the award in Its 42-inch LCD screen. united states, the natural resources defense council, thanked the panasonic significantly reduce the power consumption of newer drives.

on Dec 22, 2010 | Televison & Video

1 Answer

HCL4715W 47 in. Rear Projection Television: My tv has an overlapping picture and the colors ar...


You have a bad convergence board. Replace two of the STK 392-040 ICs. And check all the resistors that are next to these ICs. Rplace the resistors as neccessary. This will repair your TV. Thanks for asking...sorry it took so long to find you!

May 17, 2010 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Have the samsung HCL4715W and have a convergence problem. can someone point out the convergence board part number to this set?


STK ICs they are big black ICs will have Part number on them example STK392-020 also 2 resistors near ICs 2.7ohms most of the time they are Bad Call Mats Electronics for Parts 1-800-628-1118

Dec 17, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Convergence board for a HCL4715W? Which one?


It will be the one that has big black ICs STK394-020 for Parts callMats 1-800-628-1118 also there is 2 resistors 2.7 ohm near STKs replace if Bad.

Sep 25, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Triple vison/WHAT IS AN ic?


If your colors will not line up on the television screen using the convergence menu, the most likely cause is that the convergence IC’s in the set are damaged and need to be replaced.

IC’s are just many small circuits built into one package, many diodes, transistors, resistors, even regulators and power supply circuits, they can be various shapes and sizes.

There are two and sometimes three very large IC’s that control the convergence in a big screen set. They are fastened to a large heat sink because they generate a good deal of heat. Finding these is not that hard, but there is supporting electronics that will also need to be replaced during the repair. There will be fusible resistors and feedback resistors that may have been damaged at the same time.

If you choose to repair the set yourself, be very careful of the high voltage that can be stored in the capacitors, and CRT’s. This voltage can be as high as 30,000 volts.

Unless you are very handy with a soldering iron and reading color codes on the resistors. I would recommend that you have a local television service center have a look at it and get an estimate for the repair.

I don’t use the cheapest parts when I repair this circuit, because I have seen the cheap IC’s damaged as soon as power is applied. I would also recommend that when the IC’s are replaced, whoever does it, that they use plenty of heat sink compound and remove the old compound first.

I guess you are wondering how much this repair would cost.
Not knowing the labor rate in your area and diagnostic fees, I can only give you a ball park figure. I have done this repair for between $375 and $450

I hope this information allows you to resolve this issue.
If I have helped you, please help me, and rate this suggestion the highest FixYa rating. (Two Thumbs Up) If you cant rate this post with the highest rating, then please comment to this post and I will try to help you further.

May 29, 2009 | Samsung HCL4715W 47" Rear Projection...

2 Answers

Anyone need any parts for the HCL4715W? Parting mine out.


More then likely set has 2 burt resistors on convergence board 2.7ohms

Jan 27, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

I baught an amplifier kit from maplin. its a 200w power amplifier. the problem is now when i turn it the two of the resistor gets hot and they are 5W 0.47ohm resistor. can you please help me with this...


Hi

Have you checked and set the bias current for the output stage. These 2 resistors will get hot if the bias is too high. Is it the firsy time you have fired the amp up? Operating in this condition may cause the output transistors to fail. If the output transistors are damaged,you would also experince heating of these resistors. Get back to me please and let me know if you have set bias

regards
robotek

Nov 08, 2008 | Audio Players & Recorders

1 Answer

Power convergence board on RCA HD52W59


Hello renning,

You may not have to buy a new board. It just might be the Convergence Amplifiers that have gone bad. You may just want to replace them first and then see if it corrects your problem before getting the whole board. The convergence amplifiers are easily identified they are tow big black modules attached to a big metal frame called a heat sync, normally it will be located on the right rear section of the TV set looking at it from the back or it would be located in the middle rear of the set looking at it from the rear. In any even look for two big six sided black components with 21-22 pins, now this is the important parts some electronics parts stores sell what are called Convergence Kits (Yes this problem is so common that they have put kits together to repair this issue), they contain the two modules and the biasing resistors needed to properly do the job. You will have to order the kit for your make and model of TV if they do not have a kit, you will have to use a schematic diagram to find the values of the biasing resistors needed. Once you have the modules and the biasing resistors, you will have to de-solder the modules and the associated resistors and replace them with the ones you purchased. You will also need to detach the modules from the heat sink clean the heat sink (with alcohol) and then attach the new modules (with a new application of heat sink paste, which is the white stuff the you removed with the alcohol) with the screws you removed to detach the modules. Once the modules and biasing resistors are installed you will need to turn on the TV and then perform a convergence setup, your TV most likely will have an auto convergence alignment setup feature on the setup menu , use this to do the convergence alignment setup (check your users manual for help in doing this). The cost for this repair will be as follows:

2 STK392-1XX series Convergence Amplifiers $4.00-$15.00 USD Total $8.00 - $30.00 USD

9-10 biasing resistors $5.00-$10.00 USD (multipack) $15.00 USD

Solder $5.00 USD

Soldering Iron $20.00 USD

Silicone Heat sink paste $6.00 USD

de-soldering brade $5.00

The cost of materials will be about $81.00 on the high end.

The cost of a new board will be about $150.00 - $200.00 depending on the vendor.

You can buy replacement boards from a manufacture approved vendor outlet, go to the manufacture's site find support and parts they should have a listing of supported vendors. I would suggest calling the vendor and ordering from the phone asking them to send you an RMA for the part (board) this protect you from having them asses charges without delivery of product.

You will need the schematic diagram to help you install it schematics can be purchased at http://www.servicemanuals.net
for about $19.00 USD.

I hope this helps,

Thank you,

Shuttle83

Jul 15, 2008 | RCA HD52W59 HDTV Projection Television

1 Answer

RCA HD52W59 CONVERGENCE ISSUE


Hello n0lcl285,

I gave this advice before and I hope it helps you too.

You may not have to buy a new board. It just might be the Convergence Amplifiers that have gone bad. You may just want to replace them first and then see if it corrects your problem before getting the whole board. The convergence amplifiers are easily identified they are tow big black modules attached to a big metal frame called a heat sync, normally it will be located on the right rear section of the TV set looking at it from the back or it would be located in the middle rear of the set looking at it from the rear. In any even look for two big six sided black components with 21-22 pins, now this is the important parts some electronics parts stores sell what are called Convergence Kits (Yes this problem is so common that they have put kits together to repair this issue), they contain the two modules and the biasing resistors needed to properly do the job. You will have to order the kit for your make and model of TV if they do not have a kit, you will have to use a schematic diagram to find the values of the biasing resistors needed. Once you have the modules and the biasing resistors, you will have to de-solder the modules and the associated resistors and replace them with the ones you purchased. You will also need to detach the modules from the heat sink clean the heat sink (with alcohol) and then attach the new modules (with a new application of heat sink paste, which is the white stuff the you removed with the alcohol) with the screws you removed to detach the modules. Once the modules and biasing resistors are installed you will need to turn on the TV and then perform a convergence setup, your TV most likely will have an auto convergence alignment setup feature on the setup menu , use this to do the convergence alignment setup (check your users manual for help in doing this). The cost for this repair will be as follows:

2 STK392-1XX series Convergence Amplifiers $4.00-$15.00 USD Total $8.00 - $30.00 USD

9-10 biasing resistors $5.00-$10.00 USD (multipack) $15.00 USD

Solder $5.00 USD

Soldering Iron $20.00 USD

Silicone Heat sink paste $6.00 USD

de-soldering brade $5.00

The cost of materials will be about $81.00 on the high end.

The cost of a new board will be about $150.00 - $200.00 depending on the vendor.

You can buy replacement boards from a manufacture approved vendor outlet, go to the manufacture's site find support and parts they should have a listing of supported vendors. I would suggest calling the vendor and ordering from the phone asking them to send you an RMA for the part (board) this protect you from having them asses charges without delivery of product.

You will need the schematic diagram to help you install it schematics can be purchased at http://www.servicemanuals.net
for about $19.00 USD.

I hope this helps,

Thank you,

Shuttle83

Jul 15, 2008 | RCA HD52W59 HDTV Projection Television

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