Question about Samsung HCM4215W 42" Rear Projection Television

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TV set shuts down

Open low-ohm resistors on convergence board. Resistors are burnt to the point that I can't read the value, and I don't have a schematic. The board number is P55A AA41-00601A and the parts location numers are RZ142 and RZ143. If anyone has a Samsung HCM4215W 42'' Rear Projection Television and could give me the resistor values it would be greatly appreciated.

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  • poppo6252 Aug 25, 2008

    Thank you so much for the info, on my way to purchase two 3.9 ohm 2W resistors. Already replaced the pico fuse and the two fuse resistors. Will let you know how it turns out. Thanks again!!

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3.9 ohm 2W

They are parallel in circuit and measure around 2 ohms when ok. Check the fuse associated with that circuit. FD101S 3.5 A

easyab

Posted on Aug 24, 2008

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I have a hitachi 43FDX15B RPTV It appears to have a convergence problem, I've read about replacing the stk IC's but which resistors need to be replaced and what are the values on the DP15k/08 Board?


This model uses two of the STK-392-120 CHIPS and here are most of the usual resistors to suspect or check:

Hitachi AT03411S RK43 RESISTOR Hitachi AT03608S RP22 RESISTOR Hitachi AT03195S RK46,RK54, RK62 RESISTOR, 1.8OHM 1W Hitachi AT03857M R815,R865 RESISTOR, 1/2W 100 OHM Hitachi AT03191S RK50 RESISTOR, 1W 1.2 OHM Hitachi AT03197S RK50 RESISTOR, 1W 2.2 OHM Hitachi AT03199S RK41 RESISTOR, 2.7 OHM 1W Hitachi AT03202S RK42 RESISTOR, 3.3OHM 1W Hitachi AT03204S RK58 RESISTOR, 3.9 OHM 1 WATTThe RK ones are all marked on top and bottom of circuit board---usually if one is bad you will be able to see it is discolored---all are very low value and should read open or good only.

This is a fairly easy set to do this on---the whole convergence board (right side from the back view) is held in with 3 screws and an assortment of plugs--3 plugs are identical (convergence yokes and you need to mark so you get each back in same place)

A row of black snap plugs on the left side and with the screws and other plugs removed the board will lift up and out of the set.

DON'T waste your money on one of the "kits" being sold on the net---you can buy a pair of the chips for about 12 dollars on Ebay and usually only one (if any) of the resistors will be bad---those kits sound like a good idea but at 50-80 you are buying things you will not likely need to repair the set.

Let me know if you have any questions and if this information helped you rate this solution as I do this here for free.

SD TECH


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Dec 17, 2009 | Hitachi 43FDX15B 43" Rear Projection...

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AV-48WP30 - Is this a convergence board issue?


yes u r right that is the problem of convergence in your televisions.and it needs to be replaced to make it proper.
thanks.

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find the change value capacitors and resistors in the convergence section!

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It's recommended to replace all the defective parts first because if you only replace the defective resistor, it might burnt again if the convergence IC is shorted internally. I would also suggest to measure the other low value resistors with multimeter.

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1 Answer

Hitachi 61UWX10BA RPTV Convergence Repair


All of the resistors that fail are very low reading ones---like RK54(1.5 OHM-1 WATT) RK50(2.2 OHM 1 WATT) AND RK58(2.7 OHM 1 WATT)

These are not large resistors--all have location numbers on top of the board under them---most of the protection ones will begin with RK----check them like a fuse--they rarely go off value and if no reading across them they are bad---

There will be some higher value resistors like 150 or 220 ohm----never seen one of those bad.

Sometimes you just have to check them all and if they are good replace the chips and see what you have.

Do not forget to apply heat sink compound to the new chips before you install them(remove any old grease first from the heat sink.)

Good soldering is important here.


SD TECH

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rk46 is 1.8 ohm resistor---rk54 is the same value, rk 62 is 2.2, and Rk 42 is 3.3 ohm. It does not matter which direction it is installed---it is a resistor


If you have any questions feel free to let me know.


SD TECH

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1 Answer

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First---look close at all the resistors around the chips--any that are white or discolored in the middle are suspect--MOST of the time a low value resistor (1.5, 1.8, 2.2 ohm) will be bad---check them all--there will be some 150 ohm or higher--they usually do not go--


There is a site I have found where you can download a service manual---I offer it only as information and not a solution-----http://www.nodevice.com/

If you find an open resistor or resistors they all have a location number on the top of the circuit board in case they are burnt and you cannot tell value from the color bands marked on them.

LET ME KNOW IF YOU HAVE ANY QUESTIONS OR NEED ADVICE- I am here to help people.

Regards, SD TECH

Oct 06, 2009 | Hitachi 46F500 46" Rear Projection...

1 Answer

I have a jvc av48wp30 tv and need a wire diagram


Looking the convergence board from the side of the resistors (The chips will be behind the resistors), you have from de left to right:

1.5 ohms, 150ohms, 220ohms, 2.2ohms, 3.3 ohms, 220ohms, 1.8ohms, 220ohms, 150ohms, 150ohms, 1.5ohms, and dispose horizontal in relation of the other resistors (the one near to the Ic is 2.2ohms and the other is 220ohms).

Hope this helps...

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1 Answer

SAMSUNG HCM4215W Rear Projection HDTV shuts down


Low ohm resistors are open or poor solder connections on the bottom of a convergence IC.

You need to look at resistors in good light with magnifying glass. Bad ones may show as discolored or burnt.

The repair needs someone that has the schematic for the convergence cct, and can replace the burnt resistors or replace the whole convergence board.

http://calgaryconvergencerepair.weebly.com/index.html

If you are near Calgary, call me, if not, find someone that has done it before, preferably many times.

easyab

Aug 12, 2008 | Samsung HCM4216W 42" Rear Projection...

1 Answer

Samsung Rear Projection HD tv IC convergence green only messed up now. Help please


To check the pico fuses you're merely testing for continuity. If you get an infinate reading you're in good shape - if it doesn't budge the meter the fuse is open... That's a really easy set to work on for convergence problems - the convergence board is easily removed..
Another cause for mis-alignment like that are the youke return resistors... There are several out front of the convergence amps that may have changed in value. They are 3.9 ohm - 2w resistors and will look identical to Rz123 and Rz124 (same banding). For those simply select a low ohm setting on the meter and check to see if any of them have some way low or way high reading...
Need anything else just ask...
Bill

Dec 09, 2007 | Samsung HCM4216W 42" Rear Projection...

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