20 Most Recent Samsung HCN5527W 55" Rear Projection Television Questions & Answers

The model indicated does not have a "bulb" as it uses 3 picture tubes.

Examine the picture with color set at zero---stand back and look= if the screen has a mostly yellow (all or part of the screen) you have bad Glycol in the blue picture tube(if need explanation ask) and a look in the lens of the Blue tube will confirm this.

If able with back off and a small mirror look in each lens--red picture, green picture and blue picture.

If the Blue looks like a floodlight with little or no image--bad glycol in that tube.

Samsung HCN5527W... | Answered on Jun 17, 2012

Did you try aligning the crosshairs of red blue and green in convergence adjustment? Also what adjustment did you perform? Auto-adjust or 9-point adjustment?

Samsung HCN5527W... | Answered on Mar 30, 2011

The power cord normally goes through the Main switch and into the power supply section which is the SMPS. You will find the main fuse and the AC filters before it feeds to the rectifier section.

Samsung HCN5527W... | Answered on Feb 17, 2011

If you have yellow coloring on everything, this is not a lens alignment problem. Either you have a color balance problem (weak blue) or the coolant fluid in one or more CRTs is going bad. The coolant liquid is supposed be clear, but with age it breaks down and turns yellow.

First, unplug the set and remove the back. Use a mirror if you have to, but look down at the top of each CRT using a bright light. They should be colored red, green or blue, with no yellow to muddy the color. That's a quick check on the coolant condition.

You can replace the coolant, but be very careful not to spill any inside the set. Broken-down coolant can short out electronics and cause a lot of damage to the circuitry, especially in the high-voltage sections. Some people prefer to remove the CRTs from the set for this process, but that is a considerable amount of work. Others use kits with pumps to remove the coolant, and work inside the set with reasonable precautions - if there is enough room. There are a number of good tutorials on-line, or at least there were when I last looked two years ago.

I recommend getting the color right before attempting the focus. Bad coolant may scatter the light and fuzz up the picture, so check that out first and post back what you find.

If you have yellow fringes on otherwise normal colored objects, the blue convergence is off. This will also make lettering appear out of focus. Most RPTVs have a procedure for bringing up a convergence pattern (a grid of dots) using the remote control. The dots should all be white or have very little color fringing. Follow the directions, and make small adjustments, then check the effects all around the picture. Correcting one section may cause a change elsewhere. Use a ruler to make sure the dots stay in the right place; otherwise you may end up with a distorted picture.

Caution to other readers: do not try to adjust convergence if you have a "bow-tie" shaped picture in one or more colors. This indicates a convergence amplifier failure, which must be fixed first.

Samsung HCN5527W... | Answered on Oct 12, 2010

You must replace the conversion IC's. Part number: STK-392-xxx
Make sure you also change any open resitors!!!.

Samsung HCN5527W... | Answered on May 19, 2010


Thanks for using FixYa. From what you have described it seems that you have to replace the convergence IC and check power resistor for leakage, if values are not exact you have to replace them. The typical cost to get this fixed by a pro is about $300 - and it doesn't mean that he/they will do a job better than you do. The parts are less than $100 (about $20-$30 for the IC's) if you want to do it yourself. Replacing only the IC's MAY solve the problem; however, many people have also had blown resistors requiring replacement. Why would you ask should you replace both of the IC's if only one is shot?! If one is shot the other one is not far away and for that little price of the chips it worth changing them both at the same time. Also the convergence board should be checked for cracked solder. If you replace the ICs and the resistors are shot, the ICs may blow again almost immediately, meaning you may have to do the repair twice. Please do rate the solution if the issue is resolved or else revert for further assistance.


Samsung HCN5527W... | Answered on Feb 10, 2010

CK your Hori output Transistor if it is shorted high voltage will shut down

Samsung HCN5527W... | Answered on Dec 21, 2009

Yes there are default settings. You will ned the service manual for your model to set everything back to the factory settings. Just send me a email to slinteriors@yahoo.com and I will send you the service Manual for your model which will have that information, and I will assist you if you require additional assistance.

Samsung HCN5527W... | Answered on Dec 18, 2009

You red convergence IC is bad, Have the Convegence IC's replaced,It would be wise to replace them both because if the red has failed then the green/Blue IC will fail soon too. Better to replace them both now then have to do the same again with the other IC.
They are large black IC's mounted on a metal heatsink with part numbers on them the Number on them is the part number should be STK-392-040.

Samsung HCN5527W... | Answered on Dec 18, 2009

Make sure you reinstall the lamp door as there is a lamp door switch that must be closed or the unit will not fire the lamp, there should be a small hole or opening on lamp door housing. Some people install the lamp without reclosing the door just to see if the unit works , just to find out if it will not work, and when it does;nt think something is wrong, they do not put the lamp door back on first. Not to say this is the case but it does happen.

Samsung HCN5527W... | Answered on Dec 18, 2009

You have failed convergence IC's, Have the convergence IC's replaced on the convergence board, Replace them both they are the Large Black IC's mounted on large heatsinks usually mounted on a seperate board above the bottom main boards, The Part # for the IC's are STK-392-040

Samsung HCN5527W... | Answered on Dec 18, 2009

This is a model first made in 2003---if convergence is skewed and will not adjust (it can be adjusted in the customer menu) both of the STK-392-040 CHIPS THAT THIS SET USES FOR CONVERGENCE NEED TO BE REPLACED.

Usually just both chips need to be replaced and each chip is protected by a fuse device--that also needs to be checked.

A pair of the chips can be purchased on Ebay for under 20 dollars plus shipping--total parts cost should be under 30 dollars.

These are not the most easy set to do this repair on--the hard part is getting at the chips--if you or someone you know can do it you can save the set and a lot of money--most shops will get at least 300 for this kind of repair--it can be done right in your home in about 1 hour----I know as I have done hundreds of them.

If you have questions or need advice let me know--I am here to help people.

if this information helped you, rate this solution as I do this here for FREE.


Samsung HCN5527W... | Answered on Nov 11, 2009

Sorry, I just saw this post.
I hope this helps.

Yes there is one more step. You should call the technician out and have them set up the Magic Focus adjustments. I have serviced these televisions for years and I have made this mistake and had to return to fix it. You should not have to pay for a rework. The technician should have done the complete job the first time.

I hope this helps
and good luck.

Samsung HCN5527W... | Answered on Sep 27, 2009

Your symptom sounds like a damaged convergence IC.

There are two and large IC’s that control the convergence in a big screen set. They are secured to a very large aluminum heat sink2.gif. They will have a part number stamped on them that will start with an STKXXX-XXX, like STK392-110, and they are located on the signal board (on the left as you look into the back of the set).

I would recommend a low wattage soldering iron (45 watt) available at Radio Shack2.gif.

Along with the convergence IC’s there will also be some associated components that will need to be replaced as well. There are some resistors that are part of the convergence circuit that will be open and need to be replaced. Most likely these will appear charred in the center. If you have an Ohm Meter or a DVM, check all the resistors that are close to the IC’s and you should be looking for either ones that have opened or have changed values.
There are also two resistors on the front of the board located in the middle that are fusible link resistors, these should be checked for opens and replaced if they are found so.

I would suggest that you contact a service center in your area for a complete diagnosis and repair, as this type of repair can get a little tricky. But if you want to repair the set yourself, just remember to be careful. The capacitors and CRT’s can hold a charge and may shock you.

If one of the convergence IC’s are found to be bad, I would replace them both, if one has gone bad the other may go soon. I usually order my parts from Andrews Electronics in California, they will have the OEM components that you will need.
Their site is http://www.andrewselectronics.com/welcome.aspx
And their phone number is a 24-Hour Order Desk: (800) 274-4666
I recommend the phone order so you can talk to the person about the different types of IC’s that are available.

I would also advise that the convergence IC’s be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC’s fail after a short time, even though they look exactly like the OEM IC’s. I think that the bottom line is that you will get what you pay for when it comes to the parts.

You can also try http://www.tvrepairkits.com/ , I have not tried them yet, but they do carry OEM or better parts.

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)
Please Note: If you cannot rate this post with the highest rating, then please do not leave any rating. I am doing this for free and I do not think that any rating other that the best is needed.
If you need further assistance please comment to this post and I will try to help you further.

Samsung HCN5527W... | Answered on Sep 14, 2009

hard to say for sure, but the front opens up when you remove the bottom or edges. inside you need to inspect the CRT boards for any fluid leaks. there are focus adjustments on a black controller with 3 knobs on it. I would say take a look at the middle tube (green tube) if its dark and the circuit are dry. Try cleaning the CRT pins with the TV off, simply pull the cba/socket down and push it back up.
so lets see no green tube lite , cleaned pins no fluid, next tap it to see if it flashes bright, no OK now on the grn CRT circuit board slowly TV ON turn up the control you see and see if the green gets brighter. The CRTs are fluid filled and the fuild can get cloudy causing it to get dark and blury too. to check the fluid you would need to pull the screen off (a real pain)
these steps will help you isolate the isue and decide what to do next, hope this helps

I’m happy to help further over the phone at https://www.6ya.com/expert/eric_ab7c09ec01841771

Samsung HCN5527W... | Answered on Aug 26, 2009

Replace both STKS ICs Ck low ohm resistors 2.7ohms most of the time there will be 2 of them bad.

Samsung HCN5527W... | Answered on Jun 11, 2009

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