20 Most Recent Sony FD Trinitron KD-30XS955 30" TV Questions & Answers

Assuming the basics have been signed off, the usual reason that a set will not fire up is a power supply problem. In sets like yours the supply comes from the transistor that supplies the screen with pulses and hence high voltage. In short with a set as old as this I personally would not be bothered getting it repaired. You could probably find someone giving a working set away for free on numerous local selling websites.

Sony FD... | Answered on Jul 29, 2014

Anthony from Infotech posted the solution at another location:
6 and 7 blink codes 90% of the time are failure of the two control chips on the DZ board IC8002 and IC6501 both are MCZ3001D available from www.mcmelectronics.com
An ability to solder well is required to do this
Alternate solutions are to send the board to www.ptscorp.com and they will replace the chips or replace the board subject to availibility
A technician would charge $350 for this depends where you are

Sony FD... | Answered on Feb 01, 2014

Short circuit protection circuit energizes, and shuts the TV down to prevent further damages. Check for any short circuit at its main board components; especially to horizontal output transistor. Contact any service technician. If you wish to get more details, check the site linked here. Surf the site in "MOSAIC" view. It will make surf easy.

Sony FD... | Answered on Jan 24, 2014

The flashing light is "Code" for diagnostics. Count the flashes before it pauses. Some Sony user manuals will have the answer in the troubleshooting section of the manual. If you don't have your manual,

That's the link.

Hope this helps

Sony FD... | Answered on Jun 01, 2011

You need to replace the mainboard of tv
the cost is to high and it is very difficult find
one..you better replace it

Sony FD... | Answered on Jan 16, 2011

Hi gm,
Welcome to FixYa.
My name is John.
I will be assisting you with your issue.
How many times does it blink?

Sony FD... | Answered on Jan 06, 2011


Seven blinkd of standby light in Sony TVs denotes a High Voltage Shutdown. Sony TVs have a special circuit built into, called Self Fault Daiagosis. This stage will detect the faulty stage and will give its symptoms in the form of blinks, and are codes to understand the fauty stage inside.
Here in your TV, its Extra High Tension [EHT] voltage at the final anode of the picture tube exeeds its maximum, that is it goes beyond 30KV (30,000VDC], and it is dangerous, that such high voltage will cause X ray radiation from the tube, and the above ciruit sense this condition and gives you a code of seven blinks.

To rectify this fault, you must begin with its main power regulation section. Plug out the TV from AC mains, and open it. Locate the power regulating system. It is easy, that the mains wire goes directly to that section. Which will have a fuse and large filter capacitor, retifier stalk, and an STK Ic screwed onto a heatsink. The STK Ic is the power regulator. It will heat up to more than 70 degree centegrade, and this heat will spread to its surroundings. There are some small capacitors, electrolytic types, are there, has a chance to reduce its actual value due to this heat, and value reduced capacitors will make problems to the actual regulation. you just replace all that capacitors first, keep an eye on its polarity, ie electrolytic capacitors have positve and negative terminals. There will have 5 or so of them, which will not cost too much, and easy to get from any electronic spare part shop.
Check all the soldering points in the power regulator section for any loose or bad solderings. It is best to resolder all the suspected soldering points by applying a little more solder, that loose solderings are very difficult to detect. Resolder all the pins of the above said STK Ic.
Then find out the secondary voltage stage, secondary side of the SMPS transmormer, a small transformer fitted to this section. For 30" TVs, the secondary main voltage will come around 125VDC to 130VDC. There is no adjustment controls for adjusting this voltage, as STK Ics are very accurate in regulation. If it seems to be more than the voltage said above, STK ic may be defective, and should be replaced with an identical type and number.
Before checking the secondary DC voltage said above, just disconnect the supply rail which goes to LOT said above, otherwise the set will shutdown, and there will be no chance to measure this voltage.
Just keep in mind that the power regulator system of your TV has the trouble. You just do these first, and if any more assistance needed, contact me through Fixya. Ok.

Sony FD... | Answered on Nov 30, 2010

sony tv have lot of dry soldering is there so kindly do re sold.If bthe problem is continue pleace vertical ic

Sony FD... | Answered on Jul 31, 2010


Sony FD... | Answered on May 30, 2010

Other web pages explain that the number of blinking lights indicates what type of problem for a Sony tech to work on.

Sony FD... | Answered on Mar 19, 2010

How may I help you.
Let me know your question please.

Sony FD... | Answered on Mar 16, 2010

Please update tv channels data in memory.
Go to Menu and select Auto Search, TV will search all available tv channels and will store it in memory, this will update memory data and problem will be solved.

Sony FD... | Answered on Nov 27, 2009


Unfortunately, what you're describing is a repair issue. You won't be able to address the problem with troubleshooting. There is a part inside the TV that needs to be replaced. If you're under warranty, this will cost you nothing. If you're not under warranty the cost will likely be a minimum of $200 parts and labor. However, be warned that the cost could be considerably higher. You can purchase a new 42" TV starting at $598 from walmart.com, so anything more than $250. . . .probably not worth it.

I hope I've provided you useful assistance and that this information allows you to make an informed decision as to how to proceed from here. Please be sure to vote on my response. I hope I've earned a good rating from you today.

Please post a comment if you need additional assistance so that I can help you further.

Sony FD... | Answered on Jul 19, 2009

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