Sony KDL-65W855C blinking 6 times - service manual?

Hauke · 03-31-2018, 01:56 AM

Hello guys,

I got this 65 inch TV from eBay.
At startup the sony logo flashes shortly on the screen, after that the backlight turns off (I still can see the sony logo a short time) and the TV starts blinking 6 times with the standby LED.

Has anyone the service manual for this TV?

Thanks!

Hauke · 03-31-2018, 03:41 AM

I did some basic measurement now:

The TV has 2 connectors on the PSU for the LED backlight. They are rated for: 173.6V - 250.3V at 740 mA.

I measured them with an oscilloscope at the moment of the short backlight flashing. One rised up to 203V and the second rised up to 296V. After that the PSU shuts down.

So I think one LED strip is damaged. I will check this now.

Hauke · 03-31-2018, 03:54 AM

I swapped the two pins on the LED Strip connector.

Now the other channel of the LED Driver rises up to 296V.
I think now It is clear, that the error is in one LED Strip.
I will keep you updated, if you want.

Cal_G · 05-16-2018, 03:10 AM

Just registered to say I have exactly the same problem. I've replaced the power board and main board and it's exacty the same.

Service manual is here:

https://servicemanuals.us/sony/tv/kd...l-75w855c.html

**dick_barton** · 05-16-2018, 03:20 AM

Quote:

Originally Posted by Cal_G

Just registered to say I have exactly the same problem. I've replaced the power board and main board and it's exacty the same.

If the led voltages rise identically to the earlier post then you too look as though you have led issues.

Cal_G · 05-16-2018, 06:37 AM

It's all over my head sadly. The set is under 3 years old as well which is annoying.

**dick_barton** · 05-17-2018, 10:01 AM

Can you post some clear sharp photo's of your circuit boards and one showing how they interconnect.

Cal_G · 05-17-2018, 10:28 AM

I can post a slightly bad picture with the back panel off that shows the PSU and main board. I'm limited to space and time for clear photo's.

Cal_G · 05-17-2018, 10:29 AM

https://ibb.co/ig03Ld

**nomoresonys** · 05-17-2018, 04:20 PM

Like one supertech here said, forgot exactly which one, "it's gonna be bad led/s 92 percent of the time"

bstewara · 12-10-2019, 08:32 PM

Hi,
If the main board part number is A2071514A I would be interested in buying it.
I’m looking for a good main board for my Sony.
Please text Randy at 816 689 7150

Thanks

03-31-2018, 01:56 AM	#1
Hauke Member Join Date: Jan 2017 City & State: Haale My Country: Germany I'm a: Knowledge Seeker Posts: 54	Sony KDL-65W855C blinking 6 times - service manual? Hello guys, I got this 65 inch TV from eBay. At startup the sony logo flashes shortly on the screen, after that the backlight turns off (I still can see the sony logo a short time) and the TV starts blinking 6 times with the standby LED. Has anyone the service manual for this TV? Thanks!

05-16-2018, 03:10 AM	#4
Cal_G New Member Join Date: May 2018 City & State: Liverpool My Country: England I'm a: Knowledge Seeker Posts: 4	Re: Sony KDL-65W855C blinking 6 times - service manual? Just registered to say I have exactly the same problem. I've replaced the power board and main board and it's exacty the same. Service manual is here: https://servicemanuals.us/sony/tv/kd...l-75w855c.html

05-16-2018, 06:37 AM	#6
Cal_G New Member Join Date: May 2018 City & State: Liverpool My Country: England I'm a: Knowledge Seeker Posts: 4	Re: Sony KDL-65W855C blinking 6 times - service manual? It's all over my head sadly. The set is under 3 years old as well which is annoying.

05-17-2018, 10:01 AM	#7
dick_barton Badcaps Veteran Join Date: Aug 2015 City & State: Cardiff My Country: Wales Line Voltage: 230V AC, 50Hz I'm a: Hobbyist Tech Posts: 6,544	Re: Sony KDL-65W855C blinking 6 times - service manual? Can you post some clear sharp photo's of your circuit boards and one showing how they interconnect.

05-17-2018, 10:28 AM	#8
Cal_G New Member Join Date: May 2018 City & State: Liverpool My Country: England I'm a: Knowledge Seeker Posts: 4	Re: Sony KDL-65W855C blinking 6 times - service manual? I can post a slightly bad picture with the back panel off that shows the PSU and main board. I'm limited to space and time for clear photo's.

05-17-2018, 10:29 AM	#9
Cal_G New Member Join Date: May 2018 City & State: Liverpool My Country: England I'm a: Knowledge Seeker Posts: 4	Re: Sony KDL-65W855C blinking 6 times - service manual? https://ibb.co/ig03Ld

05-17-2018, 04:20 PM	#10
nomoresonys Badcaps Veteran Join Date: Jan 2013 City & State: midwest My Country: U.S. I'm a: Knowledge Seeker Posts: 8,187	Re: Sony KDL-65W855C blinking 6 times - service manual? Like one supertech here said, forgot exactly which one, "it's gonna be bad led/s 92 percent of the time" Last edited by nomoresonys; 05-17-2018 at 04:23 PM..

12-10-2019, 08:32 PM	#11
bstewara Member Join Date: Jun 2019 City & State: Spring Hill Florida My Country: USA Line Voltage: 120VAC I'm a: Knowledge Seeker Posts: 34	Re: Sony KDL-65W855C blinking 6 times - service manual? Hi, If the main board part number is A2071514A I would be interested in buying it. I’m looking for a good main board for my Sony. Please text Randy at 816 689 7150 Thanks

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