Question about Sanyo DS27510 27" TV

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T.v. was hit by lightning and wont turn on

The collector voltage on the high output transistor is only 57 volts, it doesnt seem to have high enough voltage to come on.

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Re: t.v. was hit by lightning and wont turn on - Sanyo DS27510 27" TV Standard (CRT) Televisions

Check Q605 for short. Hope this helps

Posted on Dec 30, 2007

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1 Answer

Horizontal output to screen

It comes from the case or collector of the output transistor and goes to the high voltage transformer which provides high voltage to the picture tube.

What do you need to know?

May 28, 2012 | Sharp Standard (CRT) Televisions

1 Answer

When i turn on horizontal output tripping. B+ and low voltage ok

Check the LOT and Horizontal Output Transistor. If horizontal output transistor get shorted [collector to emitter or collector to base], this kind of fault will occur. Here there is nocollector to emitter short as B+ is ok. Check for collector to base leak. It is best to repalce the horizontal transistor with a new one, and switch on the Tv for a short while, say 10 seconds or so, and feel the heat of the replaced transistor. If it gets overheated, of LOT makes a whisiling of hissing sound, LOT is faulty, and shoul be replaced sith same type and number. OK.

Apr 17, 2011 | Sony PVM-14N6U TV

1 Answer

Tv will not turn on. I have unplugged it and tried another outlet but still will not turn on. There is power going through the Tv. Any thought on what it could be

check your b+ first. if your tv has no 125 volts your tv will not turn on check your horizontal transistor located in the side of the flyback transformer unsolder the collector then try to power on your tv check your high voltage at the collector without the collector of the horizontal transistor.

Dec 22, 2010 | Akai CF2791 27" TV

1 Answer

If the voltage in h out is 200v is good or bad and the voltage regular is heat?

You mean the collector voltage on the Horz output transistor is 200 volts?

I would check this by removing the transistor and then measuring the voltage on the board (where the collector or center leg of the transistor is soldered to).

I don't know what kind of tv this is but you should see 130v or 135 volts.
RCA sets you should see 140v. If the voltage is too high replace the voltage regulator.

Mar 09, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

No picture with sound

no high voltage. most problem is possible shorted horizontal output transistor. check collector of transistor. should be 135 volts dc. if not.... power supply or fuse.

Nov 13, 2009 | Standard (CRT) Televisions

1 Answer



ang voltage ng HOT 90 to 120 Volts. kapag standby power yan ay 90 volts japag nag oscillate ang HOT power yan ay tataas ng 120volts Psi. Technician kaba?


Sep 25, 2008 | Standard (CRT) Televisions

1 Answer

Turns on light comes on but no sound and no picture

verify your b+ voltage on collector of horizontal output transistor 7405 and if 130 volts is missing or way off go to power supply circuit and verify voltage on pin 14 of ic 7511 and if there is not approx 150 volts present should replace that ic and startup capacitor 2511 and opto isolator 7513. if 130 volts is present on collector of 7405 then scope signal on 7404 and if not clean signal replace micro processor

May 27, 2008 | Philips 26PW6341 26" TV

1 Answer

Zenith tv, video retrace lines.

how is the 200 volt supply to the video output transistors??
measure the collector voltage of the video output transistors with the crt board on and off the crt. if voltage goes up when crt board is off then crt shorted

Apr 28, 2008 | Zenith Z25X22S 25" TV

2 Answers

Question about the voltages.

what is the question please?

Oct 20, 2006 | Sanyo DS27510 27" TV

2 Answers

T.V. wont turn on

The voltage might be low because is being loaded down,open the collector of the output transistor and measure the voltage again,if it goes up to 130 or the voltage is suppose to have you might be looking at a bad output transformer(flyback)there are other parts that can cause the loaded down voltage,the yoke can be one and capacitors in the deflection circuit,check to see if one of this caps is overheated (bubble)or cook,Be carefull if you open the collector when you measure the voltage,If you can try measuring the voltage somewhere else.Lets Us know if you need meore help.

Oct 09, 2006 | Sanyo DS27510 27" TV

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