Repair sony kd-60x690e tv power supply main controller board

Its probly old and worn out. Be cheapr to buy new cause soon u be replacin more parts

Not sure your skill level at repairing electronics, but I will include some basics if you are able to do some soldering.
I have worked on many TV's and the issue you are describing is typically one of two things.

FIRST take the back off your TV have a look at the power supply look for the capacitors (I have attached a photo and the items circled in red are the main capacitors to focus on) look to see if any of them appear to be bulging. A normal capacitor has an "x" marked on the metal top - this "x" should be flat or even a bit caved in. If it is round and popping up then that capacitor should be replaced. You can check the printed uf on the side and voltage (such as 1000 uf / 50v). Then look them up/order them from a place like mouse com or digikey com.

Secondly the other common issue I find is a "cold" or broken solder joint.

Take the power supply out of the TV look at the back of the board with a magnifying lens or watch repair glasses. Look very closely over the solder joints for cracks or breaks. In particular focus on the solder connections of the 3 pins transistors attached to the heatsinks. (In the image I attached they are the yellow circled items but look on the back of the power supply to where these pins attach on the green bottom side).

(For some reason it seems like the attached image is showing as very low quality - here is an external like if it will allow me to link one: https://i.ibb.co/2vcRq9v/Sony-KD-60-X690-E-PSU.jpg )

Faulty LED backlight strips. If only 2 years old, contact Sony for assistance.

Usually out of tolerance capacitors, resistors going high, and leaky diodes in the switchmode power supply can cause a high pitched squeal from any TV. Occasionally a bad transformer winding on the same board can also cause the noise but can also be a deflection fault. Check the PSU board for any bulging or dodgy looking electrolytics first then proceed from there. If you have a multimeter, you can measure the diodes and resistors. Before going any further, and worrying about repair costs, do some simple checks first. You may end up needing a replacement PSU PCB for the model of TV you have; a refurbished board is cheaper than a new one and if you fit it yourself, you save on labour costs. Start with the power supply board and work from there.

Check for it at its main power supply regulator section.

It is a power supply regulator board problem. To get more details about it, and how to repair the poser supply fault, visit this site named "Electro-help"; to the search box of either google or yahoo. It have description about how to repair the poser supply regulator section. visit it, and pull up older posts there.
Never forget to type in 'hyphen' in between words.

Turning your tv off did not cause this issue, so don't blame yourself for that. A 6 or 7 blink shutdown is because one of the two switch mode power supply control ic's have failed. the part number on them is mcz3001. They are located on the "D" baord, i don't recommend replacing this yourself because even with a tv unplugged from the wall high voltages still exist in the set.

A repairman may preform one of the two following things, he may change the whole D board or he may replace the individual components. The repair will cost around $200 if they replace the components, and if they replace the board it will cost more.

Audio Protect (7 Flash): When DC voltage is detected at the speaker or
woofer outputs, IC3604/pin128 (TV-micro) goes low and IC3604 turns off
the main power (AC relay turns OFF).
Troubleshooting Tips:
1) Main cause of defective will be located on the KD-board
2) Confi rm KD-board is securely seated on the G2-board
3) Replace KD-board

1. Try this - hold the menu button down for 10 seconds. TV should power up; you will have to turn off front panel buttons on menu.

2. You can also try a hard reset: Unplug TV from AC mains and remove all cables from TV. Wait about 30 minutes and replug to AC power and redo the cabling. Switch on the TV and see if it works..


if not please follow these:

Troubleshooting Tips:
1) Main cause of defective will be located on the KD-board
2) Confi rm KD-board is securely seated on the G2-board
3) Replace KD-board

Thats a fairly complex Chassis. Unless youre really good at dissassemble and reassembly of small components, I would suggest a Sony authorized reapir tech do the repair.

Certainly, I can help you. I would recommend going to the following link and getting the service manual so he can see first hand disassembly instructions and testing proceedures. Its only 10.99 and they email it to you shortly after purchase. The manual is a valuable resource as it will have part numbers in case you do need a new KD board. heres the link.
http://servicemanuals.vstore.ca/

DON'T FORGET TO RATE:

Audio Protect (7 Flash): When DC voltage is detected at the speaker or
woofer outputs, IC3604/pin128 (TV-micro) goes low and IC3604 turns off
the main power (AC relay turns OFF).
Troubleshooting Tips:
1) Main cause of defective will be located on the KD-board
2) Confi rm KD-board is securely seated on the G2-board
3) Replace KD-board