Question about Panasonic TH-42PD50U 42 in. Plasma EDTV

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Need help whats the color for a 2.2 ohm resistor 2w thanks

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I believe red, red, gold.
need help - fdcffa4.gif

Posted on Feb 25, 2009

  • Devon Sacco
    Devon Sacco Feb 25, 2009

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Resistor value of R704 of Sharp tv model 21v-fk200m


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Feb 17, 2015 - Question about Sharp Standard (CRT) Televisions .... What is the valueof resistor R704 in SHARP TV model 21V-FK200M circuit diagram.

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Dec 28, 2015 | Sharp Televison & Video

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How to Calculate SMD Resistor Code


SMD resistor codes isdifferent from the normal resistor color code (color bands) you had seen in theelectronic circuit boards. Surface mount resistors is very much smaller in than the normal carbon film resistor and because of this the numbers andletters were stamped upon or printed on the top side of the component. Thosenumbers and letters have a meaning and you could use that as information tofind out or calculate the desire resistance values. Sometimes the resistors aredesigned in a very small until we have difficulty to read the code. Byusing a magnifier glass we could easily read the resistor codes. clip_image002.jpg clip_image003.jpgThere are two types ofsurface mount resistors used in an electronic circuit board-the 3-digit and4-digit code SMD. The first two digits represent the two digits in the answer.The third digit represents the number of zero's you must place after the twodigits. Theanswer will be in Ohms. For example: 104 which mean 10 0000 (4 zero's)and the final answer is 100k. Let's calculate the 4 digit SMD, 1182 which mean118 00 (2 zero's) and the final answer is 11.8k.

on Oct 07, 2010 | Televison & Video

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Hitachi 61swx10b HDTV - Convergence problems. User 'gdroukas' mentioned in a post that it is probably the convergence amps and a few resistors that have changed value. Can anyone be a bit more specific? ...


Convergence ICs are Big Black ICs and will have the part number on them. STK392-110,
upgrade to 120s or 150s better ICs.
Resistors to replace are RK42 3.3ohms, RK46 1.8 ohms, RK50 2.7ohms,RK54 1.5, RK58 3.9 ohms. RK62 2.2ohms
Mats Electronics has STK ICs 1-800-628-1118 order convergence Kit that comes with resistors.
ACME has the Convergence resistors they must be 1 watt resistors 1-800-575-9833

Let me know if you need any more help Thank You.

Jan 13, 2011 | Televison & Video

1 Answer

Can,t get it to turn on.


Does the red light come on? does it go green but no picture? Here are few possible solutions:

If you have no red light and you have a Megmeet MLT386 power supply, check these parts:

1) Swollen caps on the secondary circuit.
2) Blown fuse F1 (5A/250V) this is caused by a shorted FET at QA1 (20N60), you may also find that SMT cap CX23 is burned up (.001uf) which is in parallel with diode DA2 which may be damaged/shorted, replace these components.

If the power LED goes from red to green when powered up but no picture, then it might be lost +24VDC from the power supply:

3)Check fuse F2 (3.15A/250V, I put a 5A in), if it is blown, replace FET at QA2A (9N50C), replace QA2 as well (9N50C). Check SMT resistors at R233,R234,R235,R236 (.47 ohm). If open, replace with .1 ohm 1W or 2W resistor (easier to source). Also replace SMT transistor QF1 (2X4 or 2N4401 NPN transistor). And replace diodes at DS2 and DS1 (HER207), DS2 was shorted, DS1 was ok but I replaced it anyway.

I dont know as much about the Megmeet MLT169A, but it has similar problems and similar components.

4) I had to replace all of the capacitors in the secondary circuit (there are six in a 3x3 row marked EC9 (1000uf35V),EC10(1000uf35V),EC14(470uf35V) and EC18,EC19,EC20 (all 1000uf35V).

Sep 05, 2009 | Akai LCT3201TD 32 in. LCD Television

1 Answer

Black picture, perfect sound


hi...your convergence IC's have gone bad.
These IC's operate at a very high temp, and usually only last 4-5 years.
If you remove the back of the set, you will want to look for the BIGGEST heatsink in there, on that heatsink, you will see 2 large IC's , probably STK392-040, or STK392-120's or something close...regardless - you can go on ebay to order the new ones, but MAKE SURE they are Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may only last 2 months..
You will also need some "Heat transfer paste" - you can pick this up at radio shack.
Once you remove the old IC's, test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been HOT or fried. replace the IC's and any bad resistors, and you should be good to go.
If after replacing the IC's and any defective resistors, the convergence is still bad, make sure to use a multimeter to check ALL fuses on the boards, --- sometimes when the IC's go, they will take out a fuse to the convergence power supply. If you find any bad fuses, replace them accordingly!
Hope that helps u alot...

thank u!!!

May 25, 2009 | Samsung LN-T4665F 46 in. LCD Television

1 Answer

Picture comes and goes by itself. I get sound but no picture


hi...your convergence IC's have gone bad.
These IC's operate at a very high temp, and usually only last 4-5 years.
If you remove the back of the set, you will want to look for the BIGGEST heatsink in there, on that heatsink, you will see 2 large IC's , probably STK392-040, or STK392-120's or something close...regardless - you can go on ebay to order the new ones, but MAKE SURE they are Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may only last 2 months..
You will also need some "Heat transfer paste" - you can pick this up at radio shack.
Once you remove the old IC's, test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been HOT or fried. replace the IC's and any bad resistors, and you should be good to go.
If after replacing the IC's and any defective resistors, the convergence is still bad, make sure to use a multimeter to check ALL fuses on the boards, --- sometimes when the IC's go, they will take out a fuse to the convergence power supply. If you find any bad fuses, replace them accordingly!
Hope that helps u alot...

thank u!!!

May 24, 2009 | LG 32LG30 32 in. LCD HDTV

1 Answer

Black line


Re-solder the 100 ohm resistors on the cables attached to the bottom of the display panel, each cable has 2 screws holding it in place. Inside the tv If you attempt to fix please do unplug the set. A resistor is a device with a wire out both ends and 100 ohm has the color code Brown Black Brown and then the color for tolerance

Jan 05, 2008 | Zenith P42W34P 42 in. EDTV-Ready Plasma...

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