Question about Sony KV-36FS17 36" TV

3 Answers

Sony MODEL KV-2585 TV

Q657 (Protechsion zener diode short circuite)and the TV makes a hissing sound. No picture or sound.

Posted by on

  • 1 more comment 
  • Booysen Mzizi Aug 16, 2007

    Sony MODEL KV-2585 TV, everytime the TV is put on, Line Driver Transistor Q802 2SC4927 shorts out.

  • Booysen Mzizi Aug 18, 2007

    This advice is 50% helpfull. Sorry I had my information incorrectly reported. The Model is a Sony KV2585.

    From your advice, I have almost solved this problem:
    Q802 is not shorting anymore, but D657(Protechsion zener diode)shorts out as soon as I switch the TV on. Any clue?

  • Booysen Mzizi Aug 19, 2007

    Q657 serves as a 135v regulating zener as well for protection. It is on one of the Secondary output pins of the chopper tranformer,which isolates the power suply on its primary side,and supplkies the rest of the TV with power. As soon asthis is shorted,the set is in an overloaded stage,and thus the hissing sound fromthe transformer,and thus no standby by B+. Because this short is in the primary of the chopper, no fuse breaks,but thus the set is in a protected short. Regrads.



3 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

Can any one tell me KV-2585 vertical ic number..please...

Posted on May 31, 2013


I am trying to get the code for a universal remote for my sony kv-2785r . The directions for the remote doesnt seem to be accepted by the tv. Do you have the code for this model?

Posted on Jan 17, 2008

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 18 Answers

You have your information incorrect, Q is not the designation for diodes, Q657 would be a transistor. First give us the correct number for the diode and how do you know it is shorted?

Posted on Aug 16, 2007

  • Donald Block Aug 17, 2007

    Ok, so you dont have a shorted diode after all, what else confuses me is your heading says KV32FS17 but your text say's KV2585. Now that transistor 2sc4927 is your HOT and if it keeps shorting then I would start checking other things in the Horizontal deflection. I dont have that chassis in my data log so Im just going to take some guesses. Check the flyback, do you have a Dick Smith flyback tester? Check all the electrolytic caps, and check all the resistors. Going out on a limb here I have a log for a KV2785R and I dont know if it is the same chassis or not but look for a resistor R555 if you have it check to see if it is open, if so Sony has an upgrade, let me know if you have that resistor and if it is open, I will give you the upgrade after we find out.

  • Donald Block Aug 19, 2007

    Ok, since I do not have the schematic there is not much more help I can be but I will try. We have determined That Q802 is your horizontal output, But what section is D657 in?? Is that the power supply? Or is it the vertical? Can you tell me? Since you did not answer me about that resistor (R555) I assume you do not have it in that set. Here's what I would do, since D657 shorts out every time you turn the set on I would check every thing associated with that diode, are you sure it is a zener? Check all the resistors in that circuit as well as any other diodes and check the electrolytics. If D657 is in the power supply check the voltage regulator, do you have a stand by B+ with the set just plugged in but not powered on? Let me know and take it from here.


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Can not change channels. the image is snowy. dvd's play great.

The problem on that aspect is on the tv internal tuner section,on 33volts dc supply,,cause by the a shorted zener diode...,Dods

Sep 19, 2013 | Sony FD Trinitron WEGA KV-36FS120 36" TV

3 Answers

No Display, no sound- not working, showing dead. But input Power is ok. Picture tube filamment not getting power. model sony KV-2192M3

Check the input fuse first. If it is blown, there will be some short inside the power regulator circuit. Usually Sony sets uses STR regulated power supply. You can see this STR, and Ic, screwed onto a heatsink. Replace it with a same type and number. Before replacing the STR, check the diodes used in that section for damage, mainlu zener diodes. They might get shorted along the blowing of the STR. Check that section throughly before resoldering the new STR.
If any further assistance you needs, get me through Fixya. Ok.

Nov 27, 2010 | Sony FD Trinitron WEGA KV-21CL10 21" TV

1 Answer

Had power outage while tv was on. When power restored I turned on tv with remote. TV sounded like it went on but no picture. Only timer light lashing. Sony Wega older model 27" Please help, thanks

next time dont leave your tv pluged on power, the power supply got burnt, check your power supply on the following components
fuse, power transistor, zener diodes,also rectifier diodes
if you can manage do it at home
or take it to a w/shop

Apr 17, 2009 | Sony FD Trinitron WEGA KV-24FS120 24" TV

1 Answer

Red standby light flashing no picture or sound

the power supply is faulty, check the following

power trasistor
rectifier diodes
zener diodes
fusable resistors ( less than 20ohms)
and your set will work again

Apr 07, 2009 | Sony FD Trinitron WEGA KV-24FS120 24" TV

1 Answer

Sony tv will not turn on

the power supply is a switched mode. you need to take your tv to a w/shop, and let them check the following.
powersupply rectifier diodes, power trasistor lekage,
diodes, zener diodes,
if a 90-110 volts to the line trasistor,
a line transistor be checked.
the tv simple problem

Mar 29, 2009 | Sony FD Trinitron WEGA KV-32HS500 32" TV

1 Answer

Sony Trinitron (analog) picture suddenly ''pulsating''

the verticle has a problem check the following around that area

zener diodes
resistors changing values
what is happening is that a voltage is not constant, its varing

Mar 05, 2009 | Sony FD Trinitron WEGA KV-24FS120 24" TV

1 Answer

Sony wega model: kv-32FS120 doesn't turn on

Check your power supply board and resolder the pcb, check the switching diodes and zeners.

Jan 30, 2008 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer


check the following, at the w/shop
power supply transistor,zener diodes, fusable resistor, line transistor, near line transformer,
your tv is not oscillating so even the ht voltage of 90-110v from power supply be checked.

Nov 13, 2007 | Sony KV-36XBR450 36" TV

1 Answer

Your assistance

The Sony part number for these diodes is 8-719-108-12 and yes they are 9.1 volt zener diodes @ 1 watt. I have the service manual for this set if you need it put can only send a large file like this trough a proggy called pand, so if you go to and get the proggy and leave youe e-mail addy I will send you a copy of this service manual. Good Luck

Mar 26, 2007 | Sony KV-27S65 27" TV

1 Answer

NO Picture On 2 Video Inputs ( 1 front 1 rear ) : Sound OKAY

Since it is 5 years old mostly dry soldered appears. First sort out the soldered problem. Then check zener diode in video input path is short. Mostly the diode is short. Still get problem check video switching ic also. I think former is the most problem.

Dec 13, 2006 | Sony KV-36FS12 36" TV

Not finding what you are looking for?
Sony KV-36FS17 36" TV Logo

Related Topics:

503 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Televison & Video Experts


Level 3 Expert

102366 Answers

The Knight
The Knight

Level 3 Expert

75025 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a Sony Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides