Philips TV repair questions


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Philips TV repair questions

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winard
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Jul 25, 2009, 8:40 PM

Post #1 of 39 (10106 views)
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Philips TV repair questions	Can't Post

Philips TV
Model 30PW8402/37
Chassis A02U

Issues: Currently the only way to get the TV to turn on is to leave it unplugged for a few hours then turn it on. When it turns on it usually flashes a lot of green, resembling a rave lightshow or something, then after 10-15 seconds the picture will come up and work fine until the TV is turned off. After it's off it will not come on again until it is unplugged for a few hours. When the picture actually works there are faint green tinted lines stretch horizontally across the screen only visible in dark scenes or blackness and the image is slightly bowed in an hourglass fashion.
There is no sound until the picture comes up.
If the TV has not been unplugged it will sound like it powers up, but will not light up and the led will blink a seemingly random pattern that seems something like morse code with long and short flashes.
The main circuit in the back had cat pee on it when I opened it up, i cleaned it off with a moist paper towel, with seemingly no effect but reduced odor. Nothing appears to be burned/scorched or otherwise out of place.

I've done a bit of searching but can't really narrow down any particular issue that might be causing the problems. I don't have the TV know-how to identify if it's fixable or a lost cause.
This TV was free, laying around in a garage. Was told it was broken and wanted to see if I could fix it somehow. It seems like it would be fun to try.

I'm not interested in taking it to a repair shop to be charged bookoo moneys on an old TV like this one.

So the question is, can anyone tell me what is wrong with this TV and should I even try to repair it?
Any help would be greatly appreciated.

rrobor
Veteran

Jul 26, 2009, 11:50 AM

Post #2 of 39 (10084 views)
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Re: [winard] Philips TV repair questions [In reply to]	Can't Post

Your TV is finished. Urine is acid and other things, and it will continue to rot the TV. You cant just mop it up it would need stripped and washed and even then its doubtful. If you have household insurance claim it on that, if not enjoy the short time it stays working.

Ron.M
Veteran

Jul 26, 2009, 8:01 PM

Post #3 of 39 (10064 views)
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Re: [winard] Philips TV repair questions [In reply to]	Can't Post

winard;.....
Try this:...1st,KILL the cat!!!... Sly

...Just kidding....

Quote

should I even try to repair it?

Your call,depends on your background,TV / electronics experience,etc...

Seriously,try this:...
Remove CAREFULLY the back cover...
You need to locate the flyback....
It will have a large red wire coming from the top & 2 adjustments on the side....
That red wire has 30,000 volts on it when the set is on
& will hold that voltage for quite awhile even when the set is OFF!..
USE EXTREME CARE when you do this...
KEEP your hands AWAY from that red wire when the set is ON!!!
On the side of the flyback there's 2 adjustments...
The top one is for "focus", self explanitory,for a sharp & clear pix...
The one under focus is "screen".....
This is the one you are going to adjust...
With the set up & running,adjust the "screen" control just a tiny bit counter-clockwise...
You may see a slight reduction in overall brightness....
The faint green tinted lines that stretch horizontally across the screen
only visible in dark scenes should dissappear....
IF not turn the "screen" control just a bit more....
Do NOT repeat a 3rd time...

The other possibility is that the CRT has an intermittent short...
This can be solved with an isolation transformer that can be had for about $12-$15 + S&H....
They're not hard to install & I can help you out if need be....

In reply:==>

Quote

When it turns on it usually flashes a lot of green, resembling a rave lightshow or something, then after 10-15 seconds the picture will come up and work fine until the TV is turned off.

This "could" be the CRT (Pix Tube)...We'll worry about that later..

Quote

After it's off it will not come on again until it is unplugged for a few hours.

Fail safe/protect circuits are kicking in...Normal,when there's a problem with certain circuits...

Quote

If the TV has not been unplugged it will sound like it powers up, but will not light up and the led will blink a seemingly random pattern that seems something like morse code with long and short flashes.

It IS a code from the microprocessor's self diagnostics telling us what it found wrong....
We may need you to "de-code" the flashes for further help....
It is NOT a random pattern,but a sequence of numbered flashes we use to
identify which circuit has problems....
When you unplug the TV , the micro resets itself & the TV now thinks there's
no problem til you turn it on again...NOT to worry at this time....

Finally for now:....
Depending where the cat peed "may" be a fixable problem....
Your TV is NOT "finished" from what I determined from your post!!!!
It appears to me that due to the "green" problem is why you got the set in the 1st place...

IF you are uncomfortable doing ANY of this , PLEASE let me/us know....OK....

GOOD LUCK & STAY SAFE....

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

.....
Veteran & Retired TV technician

jts1957
Veteran

Jul 27, 2009, 1:55 AM

Post #4 of 39 (10052 views)
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Re: [winard] Philips TV repair questions [In reply to]	Can't Post

Sure it was a CAT?

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

Ron.M
Veteran

Jul 27, 2009, 6:22 PM

Post #5 of 39 (10040 views)
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Re: [jts1957] Philips TV repair questions [In reply to]	Can't Post

jts1957;....

Sure it was a CAT?

Thats what he/she said!!!

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

....
Veteran & Retired TV technician

addi
New User

Jul 27, 2009, 11:04 PM

Post #6 of 39 (10027 views)
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Re: [winard] Philips TV repair questions [In reply to]	Can't Post

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Goto below website and see this.

http://www.telekomx.mobi/lp2/iwaay

shadetree
Veteran

Jul 27, 2009, 11:27 PM

Post #7 of 39 (10026 views)
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Re: [rrobor] Philips TV repair questions [In reply to]	Can't Post

if it hasn't been too long since it was wet dry the board good with a blow dryer because it may still have moisture under parts that you couldn't wipe off

Ron.M
Veteran

Jul 28, 2009, 12:40 AM

Post #8 of 39 (10012 views)
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Re: [jts1957] Philips TV repair questions [In reply to]	Can't Post

jts1957;....

I think we lost "winard" & this "might" be the reason...
==>""Your TV is finished.""....Said by "xxxxxx"... Mad

I know from experience that cat pee is NOT neccessarily fatal to electronics....
It's a shame that on a forum such as this , that we have 1 or 2 individuals that are SO quick on the draw....
Without seeing the set,who's to know where exactly the cat peed...
It "could" have been in an area that would've been relatively harmless....

winard, where are you ???....
PLEASE REPLY!!!

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

....
Veteran & Retired TV technician

jts1957
Veteran

Jul 28, 2009, 12:47 AM

Post #9 of 39 (10009 views)
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Re: [Ron.M] Philips TV repair questions [In reply to]	Can't Post

winard: Last logon: Jul 27, 2009, 7:34 PM

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

Ron.M
Veteran

Jul 28, 2009, 12:49 AM

Post #10 of 39 (10007 views)
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Re: [jts1957] Philips TV repair questions [In reply to]	Can't Post

jts1957;...

Where ??? ....Not in this thread.... Unsure

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

....
Veteran & Retired TV technician

jts1957
Veteran

Jul 28, 2009, 1:11 AM

Post #11 of 39 (9997 views)
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Re: [Ron.M] Philips TV repair questions [In reply to]	Can't Post

Remember - Click on any screen name ... ?

Maybe he's 'ahscared' of he who is not to be named ("xxxxxx")?

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

(This post was edited by jts1957 on Jul 28, 2009, 1:30 AM)

Ron.M
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Jul 28, 2009, 2:17 AM

Post #12 of 39 (9990 views)
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Re: [jts1957] Philips TV repair questions [In reply to]	Can't Post

jts1957;....

Quote

Remember - Click on any screen name ... ?

I do that from time to time, but due to the fact this forum is based in Australia, the times posted in PMs, on threads etc, throw me WAAAY off kilter....
As I live near the west coast of the USA,my times & Australia's times aren't even close...
Not only are the hours off ,so are the dates...
For example:...
In your post you said;==>...winard;Last logon: Jul 27, 2009, 7:34 PM
On his screen name it says:==>...Last Logon: Jul 28, 2009, 12:34 PM
Which to me means he logged in in the future... Sly

...

Quote

Maybe he's 'ahscared' of he who is not to be named ("xxxxxx")?

GOD, I hope NOT!!!

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

.....I'll be offline til 7-28-2009,MY time.... Sly

....
Veteran & Retired TV technician

winard
New User

Jul 28, 2009, 4:41 AM

Post #13 of 39 (9984 views)
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Re: [Ron.M] Philips TV repair questions [In reply to]	Can't Post

Thanks for the response.

I found the flyback, and a little turn fixed the green lines across the screen.

The TV didn't initially turn on when I tried it after it being off overnight this time. I did a lot of plugging it in and turning it on and unplugging and eventually it went from just a black screen to giving me a green lightshow for 10-20 seconds before going dark. After that it eventually turned on on it's own. When it was all dark and when it gave me green lights it showed different codes. The code it's giving me is:
7 short, 1long, 3short, 1short, 1long, 2short, 1long
and then it repeats.
If I turn it off it will take 20-30 seconds before it give any audio/visual when turning it on again. It seems that it has to be off for a certain amount of time before it won't come back.

I wrote that ^ yesterday. My internet is giving me issues, i keep losing connections by the time i hit post reply.

The cat pee looks ancient, it wasn't my cat... or it could have been, this TV has been in my garage for over half a year at least.

Today the TV is just turning on after 30sec-1min.

jts1957
Veteran

Jul 28, 2009, 4:55 AM

Post #14 of 39 (9982 views)
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Re: [Ron.M] Philips TV repair questions [In reply to]	Can't Post

Edit profile / Display Settings:
Time Offset (in hours):

In my case (CST - Chicago Metro)
Time Offset (in hours): -25 (yeah I know there are ONLY 24 time zones - only way I could get date & time right)(Will have to experiment again to find "right" one again after DST ends - should only be 1 hr one way or the other).

Your "winard, where are you ???....
PLEASE REPLY!!!" was posted 7:40PM, six minutes earlier (CST).

EDIT...

Quote

The code it's giving me is:
7 short, 1long, 3short, 1short, 1long, 2short, 1long
and then it repeats.

Lassie's using morse code: "What Lassie, little Timmy fell down the well?"

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

(This post was edited by jts1957 on Jul 28, 2009, 5:42 AM)

rrobor
Veteran

Jul 28, 2009, 9:58 AM

Post #15 of 39 (9973 views)
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Re: [winard] Philips TV repair questions [In reply to]	Can't Post

In my time Ive tried to clean TVs where A/ a little lad peed through an open window into it B/ the cat did it C/ a drunk heaved into a corner into it D+++/ booze coke and the like was spilled into it and E/ the potplant expelled its juices overnight into it. All create their own issues. In TVs you have very small gaps, these create capilliaries for chemicals in the liquids and once they are there you will not get them out. I suggest before anyone jumps to conclusions as to how to dry things they take a few science lessons, dried uric acid amongst fine copper wire is a time bomb, spend time and money fixing this is the action of the uninformed.

Ron.M
Veteran

Jul 28, 2009, 10:07 PM

Post #16 of 39 (9956 views)
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Re: [winard] Philips TV repair questions [In reply to]	Can't Post

winard;....

Welcome back... Smile

...Thought we lost ya!!!

1st:....I don't give a rat's @$$ how cat pee OR vomit OR booze/coke etc , gets into TVs...
The fact that its there is a moot point....
"Time bomb" , NOT neccessarily!!!....
Depends , ONCE AGAIN, where its at...PERIOD.....
Lets move on....

Lets rule in OR out a CRT problem before we get too much further involved....
Unplug the TV & GENTLY remove the CRT module....
Position the module AWAY from any other wiring & the chassis....
Free float the module in mid-air , so to speak...
Plug the TV back in & turn it on...
You should get audio in about 15-30 seconds OR less..
Leave it on for about 2-3 minutes...
IF you hear ANY static from the chassis OR arcing ANYWHERE ,immediately UNPLUG the TV...
Do NOT handle or go near the CRT module while the TV is ON...
The audio should remain ON til you turn the TV off...
While this is happening,observe the LED to see if it is flashing the codes again....
I have the service manual for this TV & somethings not right about the codes you posted....
Re-count the flashes & post them here...
The codes will start with the LED staying on for about 1 second,then go off for about 1 1/2 second,then should flash a coded number of 1 or more flashes...
Then a pause of about 3 seconds , then possibly another coded flash(es)...
When you get the LED staying on for about 1 second,you have all the codes...It repeats....

Just to satisfy "some" people here,WHERE exactly is the cat pee at ????
How far into the TV did it get ???

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

.....
Veteran & Retired TV technician

winard
New User

Jul 28, 2009, 11:05 PM

Post #17 of 39 (9950 views)
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Re: [Ron.M] Philips TV repair questions [In reply to]	Can't Post

The TV is turning on now without flashing any codes currently. Not sure why the change, i haven't touched anything but the flyback. So i can't get the code.

The urine was a light sprinkle over the main board. I'm not worried too about it because it's not a heavy soak and i've wiped up urine drenched electronics before and never really had issues unless it fried instantly.

I'm fairly busy for the next few days so i probably won't have time to mess with it. I'll most likely get back to you Friday or Saturday with the results.

Thanks for the assistance Ron.M.

Ron.M
Veteran

Jul 29, 2009, 2:17 AM

Post #18 of 39 (9940 views)
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Re: [winard] Philips TV repair questions [In reply to]	Can't Post

winard;...

Do NOT do ANY of my last post until the set acts up...
Reason is that we will NOT gain any info that would help us narrow down the problem....
ie;NO symptoms,NO clues....

The discussion about "cat pee" as far as I'm concerned is friggin over with...

Quote

Thanks for the assistance Ron.M.

You are VERY welcome,MY pleasure....

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

.....
Veteran & Retired TV technician

rrobor
Veteran

Jul 29, 2009, 10:26 AM

Post #19 of 39 (9925 views)
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Re: [Ron.M] Philips TV repair questions [In reply to]	Can't Post

And good luck to you too Ron, This will be another post going on Ad Infinitum. Sure I think your trying to help the guy but you are not, the TV failed due to urine so its still in there. Now mostly its dry and its a corrosive acid gnawing away at copper. When it happened or soon after, removing the boards, washing and neutralising them may have worked, but not now. So do your whatever it is, but please leave me out of your thoughts, no little snide remarks please I gave my view, Sure the guy doesnt like it but its my view as a pro, and guess what I would take bets that in the end this set wont be fixed, It will continue to do odd things till it packs up and that will be its end.

FUXER
User

Jul 30, 2009, 7:23 AM

Post #20 of 39 (9913 views)
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Re: [jts1957] Philips TV repair questions [In reply to]	Can't Post

Can you teach me how to piddle like that again?(Goddamn prostate!)

FUXER
User

Jul 30, 2009, 7:26 AM

Post #21 of 39 (9912 views)
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Re: [Ron.M] Philips TV repair questions [In reply to]	Can't Post

To my knowledge this site is not Australia located- the times indicate to me possibly U.K..

jts1957
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Jul 30, 2009, 9:02 AM

Post #22 of 39 (9906 views)
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Re: [FUXER] Philips TV repair questions [In reply to]	Can't Post

See last post on this thread:
http://www.tv-forums.com/...string=server;#16313

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

rrobor
Veteran

Jul 30, 2009, 1:23 PM

Post #23 of 39 (9903 views)
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Re: [jts1957] Philips TV repair questions [In reply to]	Can't Post

OO that takes me baack a bit. From memory we were trying to track down a guy who was hacking the site, agaan from memory the server was based in some far out island but was American and some Mexican guy was accusing them of pinching his property, Was a real ding dong battle. Think it was Tahiti but thats only my belief. At that time I had a pinger and used to ping to see where things came from and went, got bored with that

Ron.M
Veteran

Jul 30, 2009, 3:55 PM

Post #24 of 39 (9895 views)
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Re: [jts1957] Philips TV repair questions [In reply to]	Can't Post

jts1957;......

Whoooa!!!

What the heck happened here ????... Unsure

....Check out my post #5 !!!! .
Its pretty well gone & it extends down the thread for what seens miles.... Mad

.....
Also the other posts are VERY , VERY Wide... Mad

.....
We get hacked ???... Crazy

......
One of those phony ads I replied to come back for revenge ???..... Unsure

......

Do we need to contact jammer about this or ???....
I've checked other threads & it appears to be just this thread that's messed up.... Pirate

.....

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

......
Veteran & Retired TV technician

(This post was edited by Ron.M on Jul 30, 2009, 4:00 PM)

jts1957
Veteran

Jul 30, 2009, 7:49 PM

Post #25 of 39 (9888 views)
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Re: [Ron.M] Philips TV repair questions [In reply to]	Can't Post

I have trouble remembering my own posts.
I'm not seeing any width problem either. Wink

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

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