Question about Toshiba 32A33 32" TV

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I need a replacement part # and location for the "BAD-Blue Signal Video Output Transistor"???

I am a retired A/V technician and I have the ability to replace this component if someone can locate a shematic and get the infor mation that I need...thanx, Franklin - muzitronixman/yahoo My Zenith 32A33 screen goes blue after it warms up and then it turns itself off and after it is back on, it looks like the picture has a translucent blue veil over it and there are darker blue slanted lines across the screen. Best Solutionposted on Jul 26, 2006 By Pravin Rank: Master Rating: 76.38%, 304 votes Pravin indicated that his solution for 32A33 32" TV Problem is valid for all Standard Televisions 90 % probability, looks like the Blue Signal Video Output Transistor has become faulty. This is a very simple "fixable' problem for a Professional Technician. Should not take more than 15-20 minutes.

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Re: I need a replacement part # and location for the...

Actually, your description indicates that the blue gun in the tube itself is shorting out. This happens when the set has been on for a while and the metal parts in the CRT guns have heated up and actually contact each other. If the video output transistor is bad then your screen would be blue right from the start. An easy way to prove it is to monitor the voltage of the blue pin on the picture tube socket. It should measure around 150 - 175 volts. When the screen starts going blue you will see that voltage drop dramatically. Quickly pull the CRT board off the picture tube while watching the voltage on the blue pin. If the voltage jumps back up the instant the socket is removed, your picture tube is bad. There are CRT rejuvinators that have the "remove short" function, but that has about a 50% chance of success and I usually find that the short will return a few months down the road.

Posted on Aug 05, 2007

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Toshiba 150r6f color blue is missing

If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy.
The transistor that your friend told you, can be located at the CRT base card [Video Output] itself.

Mar 01, 2014 | Standard (CRT) Televisions

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If the color tone is just a bit more blue, check the video output section circuit for any fault. If there is no fault, and still you see blueish tone, replace the blue output transistor. The video output stage circuit card can be located at the back of the CRT itself, will be directly plugged on to its back. If nothing helps, you have to enter its service mode option, to check the blue drive, and blue cutoff settings. If this si the case, it will be best to contact any service technician, since the adjustment is somewhat critical one. To get some details, Pull up older posts.

Dec 10, 2013 | Samsung TV CS29Z40

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Yellow raster on tv is cause by what?

Check the Blue video output transistor for loose solder. This transistor can be located at its video output card, usually pluged on to the neck of the picture tube. There is no blue output is now, only Red and green are there. The mixing of Red and Blue color, and absensce of blue color, causes the raster to appear as yellow. The fault is purlely with blue output transistor at the video output state of your tV. If there is no loose solder, just replace this transistor with same number. If loose solderings are found, resolder that points by applying a little more solder, without making any solder bridge short in between adjecent solder terminals.

Mar 04, 2012 | Standard (CRT) Televisions

1 Answer

I have a RCA 32V432T 36in...the screen is light blue with white horizontal looks like a film in front of the actual picture...there is still audio though. what's going on?

There are two main causes for this fault. The first one is, advanced screen voltage to the screen grid of picture tube. The second one is leaky blue video output transisotr.
Just open your TV, and locate the screen control. It usually can be located with LOT [Line Output Transformer]. There will be two adjustable controls integrated to this LOT, marked as screen and focus. Out of which, the lower one will be for screen adjustment, and the upper one for focus adjustment. Just rotate the screen control [the lower one] to a little counterclockwise, so that the thin horoizontal lines on the screen just fade of. Adjustment is critical and should be done with care, and a small movement may just be enough. If it does not help you, repalce the blue video output transistor. This part can be located at the bace card [the printed circuit board fitted to the neck of the picture tube]. Locate it, replace it. OK.

Apr 17, 2011 | RCA 32V420T 32" TV

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Picture is greenish and redish no bllue


Blue video output section of your Soney tv has failed. It may be due to a open video output transistor or a resistor. Video output section can be located at the picture tube base card itself. in some models, Sony used transistors, and on others they uses IC for this section. Just open your tV, and measure the voltages at the Red, Green and Blue cathode voltages. It should be almost the same to each other. In your tVs case, the voltage at the Blue cathode will be high. Normally it should be due to an open resistor or loose or bad solderings. I advise you to resolder most of the suspected solder points with applying a little more solder, without making any solder bridge shorts in between. Check it out. If this does not help, check Blue output transistor, or if it is an Ic; whatever may be used, for open. If found faulty, replace it with same type and number. OK.

Jan 11, 2011 | Sony KV-36FS12 36" TV

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My tv model 60P8341A philips television screen is red and dull in color what do i need to do?

If your TV screen looks more red its red video output section is in trouble. Some philips circuts uses transistors while others uses ICs in that section. Philips magnavox model have both types. We here in India, have transistorised video output stages in Philips Magnavox sets. Whatever the ciruit type may be, the fault and its remedy is same.
Check whether your set has transistors or ICs used. If transistors are used, check the collector voltage at red video output transistor. If ICs are used, some sets uses a single IC for Red, Green and Blue output stages. Some of them have three ICs on board as Red,Green and blue output stages.
The video output stages are integrated on the base card of your TV. That is, a small square or rectangular board, pluged into the neck of the picture tube. You just find out the red,green and blue output transistors, or ics whichever may be used. It is ver easy to understand the video output transistors. They may be a little larger than other transistors.
An easy way is to locate the Red,Green and blue cathodes of the picture tube base board points. Check the voltage of the three of them They must be almost equal to each other, provided a little, that is, 2 or 3VDC difference is allowable and will be. In your case, the voltage at the red cathode may be , not may be, must be low. As cathode voltage lowers, emmision of that cathode will rise, and poise that colour is in excess. If the Red Cathode voltage in your TV is found low, say difference betwwen other two cathodes is 50v or so, repace the red output transistor or the Ic if used at that stage. If a single Ic is used in your TV as R_G_B outputs, replce the same. If three Ics are there, replace the red output control Ic. ok
If you have any more problems, inform fixya. They will send me alerts.
Thank you

Oct 20, 2010 | Philips Magnavox 27MS343S 27" TV

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I came home from work and the picture color is odd. The skin tone of everyone is a blue tint and I can't get it back to normal.

You have a bad ground on a color output transistor or a bad ground on a color output resistor. These are located on a board that is attached to the CRT. Also check the diodes on this same board, these may be bad as well. In worst cases the color output transistor and a diode will be bad. Thanks for asking!

Aug 02, 2010 | Toshiba 36HF71 36" TV

1 Answer


your problem is in blue video output circuit.

as you are seeing lines with blue  color

those lines are called retrace lines.

please check

  • supply to blue video output ckt.&blue video output transistor.
  • loose crt base or crt base connector.
  • componenrs related to blue video output section
  • blue signal coming to red video output ckt from signal processor.
  • at last but rare cases crt weak.
  • hopr this will help

good luck

Oct 16, 2007 | Haier HTF27R11 27" TV

1 Answer

Sony FD Trinitron WEGA KV-27FS100 27"

if it is white brightlines along with blue back ground please check 1 sypply to blue video output transformer. 2 crt base or connector loose. 3 check components related to blue video ckt & blue video output transistor. 4 blue signal reaching to blue video section 5 verv very rare case if set is old set then there is a possibility of crt. hope this will help.

Oct 06, 2007 | Sony FD Trinitron WEGA KV-27FS100 27" TV

2 Answers

Screen has turned a blue tint after turning itself off

I will not bore you with advice which you cannot follow. (90 % probability, looks like the Blue Signal Video Output Transistor has become faulty). This is a very simple "fixable' problem for a Professional Technician. Should not take more than 15-20 minutes.Nothing you can do. Call for Professional help.

Jul 26, 2006 | Toshiba 32A33 32" TV

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