Question about RCA P61310 TV

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Insufficient width I replaced the High Voltage sensor, which was badly burned inside the input tower and also replaced the IHVT. Set now works great,but is lacking in horizontal width. I do not have a repair manual on the DTV307GC Chassis. I have tried all the other ways of getting into a rca service menu and none worked on this set. The lack of width is also keeping the Automatic Convergence from working, due to the fact the scan in not in range of the sensors. How do I adjust the width? Is there a service menu or does this have to be done with a "Chipper Checker"?

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Re: insufficient width

You can goto and search for your model and it may tell you.

Posted on Dec 06, 2007

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Samsung 21 ultra slim crt ctv smd ic tda 12156h n3 3 changed set ok but exess width no variatin in width in service mode

IC defective. Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
Type in this key phrase " my service table today " in the search box at the top right of the display window of the home page, to get gathered some pages which has the details of practical experiences to the author of that site.

May 28, 2013 | Standard (CRT) Televisions

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Small picture

If a standard set and not a LCD etc it has a picture tube, width is a product of the high voltage circuit in that set---this is called the deflection circuit----deflects the picture top to bottom and also left to right, most likely a bad cap or if a wave like motion can be seen in the picture maybe power supply but that is rare.

Not knowing the age, size or value of the set if it is over 5 years old or the screen size is under 32 inches just replace it.

If no major part is bad the repair could exceed 100 dollars.

Dec 06, 2012 | Sanyo Standard (CRT) Televisions

1 Answer

Will not come on, pops then blinks 8 times

what a wonderful day it is my friend. you have a high voltage problem. high voltage problems happen when high voltage reaches the x-ray protection circuit and shuts the chassis down.the problem could be an open or change in capacitance of the bypass cap or a defective high voltage output transformer(ihvt). also check the horizontal output and flyback for defective circuits. i hope this help solve your proble. this is definitely a job for a service tech because you will be dealing with very high and dangerous voltages. please rate my solution, and thank you friend.

Nov 19, 2009 | Sony FD Trinitron WEGA KV-32HS500 32" TV

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Hello valexandrur,

You are in the correct section, now your problem may be a shorted Integrated High Voltage Transformer (IHVT) also called a Fly-back Transformer and or a shorted Horizontal Output Transistor (HOT). I would first check the Transistor to see if it is shorted between the emitter and collector (to do this use a multimeter set to "Rx1") and the reading between the emitter and collector should be near infinite no reading, if the reading is 000 ohms then the transistor is shorted and should be replaced. Now for the hard part, you technically can not check for shorted transformer turns in the IHVT using a multimeter, you will have to use a device which will allow you to do what is called a ring test. If you do not have this piece of equipment (IHVT tester), I would replace the IHVT just as a matter of good measure, since the HOT had drawn a lot of current I would assume that the IHVT was damaged to since it is in the serial path between the collector of the transistor and the VCC supply.

I hope this helps,

Thank you,


Jan 19, 2009 | Proton MM2701VT 27" TV

1 Answer

Picture weak and stays on only a few seconds.

Hello tellis356,

He replaced the Integrated High Voltage Transformer (IHVT) (I so hate the term flyback even though it is descriptive of the function of the component). However he may have only solved part of the problem. My next question is did he perform a diagnostic on the CRT (picture tube)? It may well be the CRT, but I would first suggest that you have the repairman check the voltage and signal levels in the horizontal section of the TV and check the video signal and voltage levels at the output of the Video processor to the CRT socket board. Then after these are tested and proven to be within specifications, then run a diagnostic on the CRT using a CRT test set. This way he'll know for sure if the problem is in the circuitry or the CRT.

I am suspecting that the first trouble you experienced was the set was completely out? If so that is why he may have replaced the IHVT. He should have also replaced the Horizontal Output Transistor because it is in series with the IHVT and would have taken some of the damage that the IHVT would have sustained. So having him check that too would not be out of sorts.

I hope this helps,

Thank you,


Nov 14, 2008 | Sony FD Trinitron WEGA KV-36FS120 36" TV

1 Answer

RCA F27650 32" TV Problem

Hello ddw7321,

This sounds like it could be a malfunction in the High Voltage section of the TV. The shutdown circuit is switching on and preventing the TV from turning on. This might be due to an excessive amount of current flow possibly caused by a shorted turn in the Integrated High Voltage Transformer (IHVT), or a shorted Horizontal Output Transistor (HOT). To test this you will have to unplug the TV set, and with a multimeter set to resistance, measure the resistance from the collector of the HOT to ground, If it reads 0 ohms then that is the problem (a shorted HOT). The next test which is of the IHVT is a little difficult because it requires removing the IHVT and doing a ring test. At this point I would like to suggest that you take the TV to a repair shop, because these next test might be difficult for someone who does not know electronics, and if you have no knowledge of electronics you may do more damage then good.

With that being said:

Remove the HV anode of the IHVT connected to the CRT by first using a large flathead screwdriver connected with a clip lead to the ground of the TV, by sliding the screwdriver under the rubber cap and releasing the clips. Then unsolder the pins on the bottom of the IHVT using a soldering iron and a suction type desoldering pump. when the solder is removed , pull the IHVT from the circuit board. locating the main primary winding connect it to the device that you are using to perform your ring test (I use a Sencore LC-102), when it is connected do the ring test and it should have at least 10 rings to be considered good, any less then 10 and the IHVT is to be considered as bad.

I hope this helps.

Thank you,


Oct 04, 2008 | RCA F27650 27" TV

1 Answer

Picture to wide

This trouble symptom picture wide or"blooming", the picture becomes dim even with the brightness control full on,and there is an abnormal enlargement of picture or raster.Usually,the enlargement is uniform,but there may be some defocusing.In some circuits,the brightness control operatesin reverse(rotating the control for an increase in brightness produces a decrease) after reaching a critical point on the control. If the picture wide is not accompanied by insufficient width(a symptom of horizontal output failure) the probable cause is a high volatge circuit ony,particularly the HV rectifier and HV winding.Any circuit problem that reduces but does not completely eliminate the high-voltage output to the picture tube second anode can cause overscan. The most likely defects are leaking high-voltage capacitors,defective high voltge tube rectifiers,leaking high voltage leads,defects in high voltage circuit protective resistance,and shorted turns in high voltage winding of the flyback transformer.

Hope this may help you;



Sep 06, 2008 | Toshiba 32AF45 32" TV

1 Answer

Picture Blown Up

Hello jasalf,

This problem is called blooming, and it is caused by poor High Voltage Regulation. It usually denotes a problem in the HV section of the TV. More then likely the problem is in the IHVT (Integrated High Voltage Transformer).

I hope this helps,


Aug 21, 2008 | Proscan PS27123 TV

2 Answers

Television not working

Hello mo4uc,

Check to see if the Horizontal Output Transistors (HOT) collector lead is shorted to ground, this can be done by taking an ohmmeter reading between the collector and ground. If the transistor is shorted, that could be one of your problems, the other problem could be a defective IHVT (Integrated High Voltage Transformer). You will need to do a ring test to see if the IHVT is good.

I hope this helps

Thank you,


Aug 04, 2008 | Orion1934 19" TV

1 Answer

Panasonic 32" picture reduction

IT IS LESS WIDTH PROBLEM It has to be done by tech person as inside tv high voltage is thare so unskilled person should not open tv. problem is simple. 1 less output from regulated power supply . 2 if width control is there it can be done by that.

Sep 17, 2007 | Panasonic CT-32SL14 32" TV

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