Sony KDP-57WS550 led blinks 4 times


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Sony KDP-57WS550 led blinks 4 times

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brownboi
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Oct 8, 2010, 10:43 PM

Post #1 of 57 (12916 views)
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Sony KDP-57WS550 led blinks 4 times	Can't Post

I have a Sony KDP-57WS550 projection tv that doesn't turn on. When the power is pressed there is a click then the led light blinks 4 times, then another click. There is no pic or sound.
Any ideas, can it be repaired??

Thanks for any help!

Ron.M
Veteran

Oct 9, 2010, 7:17 PM

Post #2 of 57 (12904 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

brownboi;....

Quote

Any ideas, can it be repaired??

Yes , it can.....
BUT , it remains to be seen whether or not you can do it or need to have a shop do it....
Depends on your talents & knowledge of electronics....

Quote

the led light blinks 4 times

Four blinks - No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505

Now let's see what that means to you.....

Later....Ron.M.... Cool

....
Veteran & Retired TV technician

brownboi
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Oct 10, 2010, 10:35 PM

Post #3 of 57 (12892 views)
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Re: [Ron.M] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

Hi Ron.M,

I found Q1505 on the UA board, but IC1509, I can't find. I see only IC1501-7, am I just over looking it?

Thanks for your help!

Ron.M
Veteran

Oct 10, 2010, 11:14 PM

Post #4 of 57 (12885 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

brownboi;....

Before I get too deep with a possible novice , answer this , please;....

How much electronic/TV repair background experience do you have ????

Then I have an idea of where we go....

This;=>...

Quote

Four blinks - No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505

is from a generic chart & all the parts listed may/may not be in ALL models...
So IC1509 , accordiing to the service manual that I have , is NOT in your set....

THANKS....

Ron.M....
Veteran & Retired TV technician

brownboi
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Oct 11, 2010, 4:10 AM

Post #5 of 57 (12877 views)
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Re: [Ron.M] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

Ok, actual tv repair experience; none. Electronics experience; not much. The usual, open things to see how they worked, getting shocked a few times, put together simple kits, broken solder repairs. Very basic stuff.

Ron.M
Veteran

Oct 12, 2010, 9:20 PM

Post #6 of 57 (12852 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

brownboi;.....

Ok...With your VERY limited experience & electronic knowledge , I'm a bit hesitant to continue with you...
But , I'll give you some limited help...
Do you have a DVM or a Volt/Ohm meter ????
& know how to use it ????
ANY schooling on electronics ????

IF you answer this in the next 2 hours , & your answers are satisfactory , I'll prepare a detailed post on what IC to check , where its at , etc , so you can have the info tonite.....

Later....Ron.M..... Cool

....
Veteran & Retired TV technician

brownboi
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Oct 13, 2010, 12:38 AM

Post #7 of 57 (12847 views)
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Re: [Ron.M] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

Hi Ron,

Yes I have a volt/ohm meter, yes I know how to use it. Schooling, I did start, but didn't finish.

Ron.M
Veteran

Oct 13, 2010, 6:10 PM

Post #8 of 57 (12830 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

brownboi;....
This should be the last of my questions.... Smile

....

Quote

Schooling, I did start, but didn't finish.

What type of school was it ???
What did you basically learn ????
IF needed , can you take & post pix ????

THANK you VERY much for your honest answers..... Laugh

.....

Later....Ron.M.... Cool

.....
Veteran & Retired TV technician

brownboi
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Oct 14, 2010, 8:37 AM

Post #9 of 57 (12822 views)
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Re: [Ron.M] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

It was an ITT Tech, I didn't get to far in so it was mostly introductory stuff. Ohms law, basic components, what they do, how they work and such.
Yes i can take and post pics.

Thanks Ron!

Ron.M
Veteran

Oct 15, 2010, 12:49 AM

Post #10 of 57 (12809 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

brownboi;....

OK...THANKS for your honesty....
I'll try to help you as best I can....
What we are going to do here is determine if the Vertical Output IC is working...
If you do NOT understand any of what I tell you , STOP & do NOT continue...
Post with what it is & I'll reply with the info to help....OK...THANKS....

On each yoke on the CRTs , you'll see 2 or more sets of wiring....
Look for the set that has a green , yellow , red & black wire...
Follow the green & yellow to where all 3 sets of green & yellow are plugged in staggered side by side on the "D" board....
I'll put a pix below...

The connectors will be marked CN5013 , CN5014 & CN5015....
On the "D" board toward the front center , you'll see a large thing sticking up with a thick red wire coming out from the top...
That is the "flyback" & that wire has 30,000 volts on it when the set is on OR off....
Keep your hands & the meter AWAY from that area at ALL times...
Go to CN5013 pin #1 & hook up the positive lead of you meter from there to chassis ground....
There are only 3 pins on these connectors....
Pin #1 is the pin closest the rear of the board...
CN5013 will be to the left towards the front from the heatsink near the center rear of the board...
Just stick the point of your probe down alongside the wire till it touches the bare wire or pin metal...
Chassis ground will be best found on the metal case of the tuner...
Clip a lead there...
You will need to set your meter to AC volts on a scale that safely reads about 15v AC...
With your probes attached , turn on the TV & watch the meter....
Note what it reads & post the info....

IF I get back the info I expect , the next steps will be component level testing & troubleshooting...
Are you going to be able to handle that OK ????

Later....Ron.M.... Cool

....
Veteran & Retired TV technician

brownboi
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Oct 15, 2010, 8:58 PM

Post #11 of 57 (12801 views)
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Re: [Ron.M] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

Hi Ron,

I checked it and my meter isn't reading anything there.

Ron.M
Veteran

Oct 16, 2010, 2:12 AM

Post #12 of 57 (12792 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

brownboi;....

Quote

IF I get back the info I expect , the next steps will be component level testing & troubleshooting...
Are you going to be able to handle that OK ????

OK , that was what I expected....
Now please answer the question....THANKS....

Later..Ron.M.... Cool

....
Veteran & Retired TV technician

brownboi
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Oct 16, 2010, 6:37 AM

Post #13 of 57 (12788 views)
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Re: [Ron.M] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

Sorry, yes I can handle it. Thanks!

Ron.M
Veteran

Oct 16, 2010, 10:42 PM

Post #14 of 57 (12780 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

brownboi;.....

OK...Here we go.....
IF you have ANY problem understanding ANY of my instructions , STOP & post & I'll get back to help you thru it....OK.....THANKS...
We are going to read DC volts on the Vertical out IC....
There's 2 ways we can do this...
Either from the top of the chassis OR the bottom of the "D" board...
I'll give you both ways & you can decide which is easier for you to do....
Top side first...
First you have to pull the chassis out from the cabinet...
There are 4 screws that you need to remove to slide the chassis back so you can get at the Vertical out IC....
See pix below;=>...

On the "D" board (on the left side of the chassis) about center rear you will see an aluminum heat sink with fins on it....
On the rear side of it is IC1501 , that's the vertical out IC....

In the pix below , the #1 pin is marked , the #2 pin is marked...

Notice that the #1 pin is bent toward the rear of the TV...
The next pin (#2) goes straight down thru the board.....
They are staggered & alternately bent....
You will need to get to pins #2 , 4 , & 6....
Set your meter to read DC volts...
Volts are as follows;
Pin #2= +15 vdc
pin #4= -15 vdc
Pin #6= +15 vdc
Use the tuner case for your ground connection....
Use the sharp point of your probe IF you have a SAFE access to the pins...
You may not have enough clearance to get your meter probe safely past the others as they are ALL behind the bent pins....
IF you cant do it that way , heres plan "B".....
Pull the chassis out as you did for above....

You will have to do step #1 (in the circle) & free some wiring up so you can tilt the chassis up....
When you've gotten enough wiring freed up , SLOWLY & CAUTIOUSLY tip the chaassis up so you have access to the bottom covers as shown....
Remove ONLY the cover that gives you access to the Vertical Out IC....
Remember where pin #2 is & take readings from all 3 pins & post results....
Use care as there are some high voltage sources that can zap you...
Whether you do it using the first method or plan "B" , leave the chassis as is....
There's more tests coming....

Post back with your readings......THANKS....

Later...Ron.M....
Veteran & Retired TV technician

jts1957
Veteran

Oct 16, 2010, 11:27 PM

Post #15 of 57 (12776 views)
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Re: [Ron.M] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

Wouldn't (from the top) R5105; R5114 & D5102 cathode be the same points respectively? Less chance of probe slipping.

-------------------------
Location: Far, Far Away

Ron.M
Veteran

Oct 17, 2010, 6:25 PM

Post #16 of 57 (12765 views)
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Re: [jts1957] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

jts1957;....

YES , they would...
But , I'm not sure if he can find them.....

brownboi;....

Those 3 parts are on the 2nd & 3rd pix....
They aren't too clear....
Try looking on the board for the numbers...
If you need better pix , post & I'll do my best...

Good Luck....

later....Ron.M.... Cool

....
Veteran & Retired TV technician

(This post was edited by Ron.M on Oct 17, 2010, 6:27 PM)

brownboi
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Oct 18, 2010, 6:19 AM

Post #17 of 57 (12753 views)
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Re: [Ron.M] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

Hi Ron,

Heres what my meter read; R5105, -0.04; R5114, 0.10; D5102, 0.32.

(This post was edited by brownboi on Oct 18, 2010, 6:24 AM)

Ron.M
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Oct 18, 2010, 7:16 PM

Post #18 of 57 (12741 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

brownboi;....

OK....I assume you got those readings with the TV turned on....

On the same board ("D") , on the far left side of the board towards the rear , you'll see a medium(?) sized transformer called T5200....
Look for R6613 & R6614....
They will be 0.47 ohm 1/2 watt resistors...
Set your meter on ohms...
Do this with the TV OFF....
Connect one probe to chassis ground & the other to one side of one of those resistors...
You should read "0.00" ohms OR VERY close to it....
Now go to the other side of the SAME resistor....
You should get the about the SAME reading...
Do the same checks with the other resistor....
Post results....Thanks.... Sly

.....

Later...Ron.M.... Cool

....
Veteran & Retired TV technician

brownboi
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Oct 18, 2010, 9:29 PM

Post #19 of 57 (12731 views)
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Re: [Ron.M] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

Yes, those readings were with the tv on. 'On' being only a few seconds, just long enough for the led to blink 4 times then shuts off.

I got 0.00 on both resistors, both sides.

(This post was edited by brownboi on Oct 18, 2010, 9:30 PM)

Ron.M
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Oct 19, 2010, 1:48 AM

Post #20 of 57 (12719 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

brownboi;.....

I'm begining to think that we don't have a Vertical problem here...
Lets take a look elsewhere for the time being....
I want to see if we have a supply voltage at Q5201....
It will be Northeast of the front right corner of T5200....
Look for D5202 (We want the banded end) , & R5206 OR D5201...
Read volts on both sides of D5201 OR R5206.....
D5201 sits behind the thin heat sink that Q5201 is on...
Use care as to not short out the meter probe against the heat sink....
Set your meter to DC volts at about 150 vdc range...
Have your probes in place before you turn the TV on....
Post all 3 readings....THANKS... Sly

....

Later...Ron.M.... Cool

....
Veteran & Retired TV technician

brownboi
New User

Oct 19, 2010, 6:23 AM

Post #21 of 57 (12713 views)
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Re: [Ron.M] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

I checked D5202, band end and R5206, both ends, my meter didn't read anything.

Should I check my meter next?? Laugh

Thanks!

jts1957
Veteran

Oct 19, 2010, 7:42 AM

Post #22 of 57 (12710 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

Quote

Yes I have a volt/ohm meter, yes I know how to use it.

Quote

Should I check my meter next??

Can we assume this means you do (or don't) know how to tell if your meter is working correctly? Crazy

-------------------------
Location: Far, Far Away

brownboi
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Oct 19, 2010, 9:05 AM

Post #23 of 57 (12707 views)
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Re: [jts1957] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

I was joking, yes i know how!

jts1957
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Oct 19, 2010, 1:15 PM

Post #24 of 57 (12702 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

Whew!

-------------------------
Location: Far, Far Away

Ron.M
Veteran

Oct 20, 2010, 1:05 AM

Post #25 of 57 (12692 views)
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Re: [brownboi] Sony KDP-57WS550 led blinks 4 times [In reply to]	Can't Post

brownboi;....

I think we are being misled by those "Sony" blinking codes....
So , lets check power supply volts....
Just to the right of the Vertical Output IC is connector CN5019...
Pin #1 is the pin on the left end...
Need readings from pins # 1 , 4 & 6....
Pin 1 should be about +135 vdc...
Pin 4 should be about -12 vdc...
Pin 6 should be about +12 vdc.....
Have your meter probes connected & then turn on the TV one time....
Then unplug the TV for a few mins...
Relocate your probes for the next reading....
Plug it back in & take the next reading....
Repeat for the 3rd reading....
Post readings....THANKS.... Sly

.....

Have fun.....

Later....Ron.M.... Cool

....
Veteran & Retired TV technician

(This post was edited by Ron.M on Oct 20, 2010, 1:12 AM)

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