Panasonic CT27G11U off & on by itself


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Panasonic CT27G11U off & on by itself

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SteadyShot
Novice

Feb 20, 2003, 3:42 PM

Post #1 of 9 (1099 views)
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Panasonic CT27G11U off & on by itself	Can't Post

Panasonic turns off and on by itself when watching. I have a Panasonic CT-27G11U built in 1998. When watching TV it will go black without sound like turning it off, after a few seconds to two minutes it will come back displaying the action menu. Also if I tap the plastic front near the pushbuttons it will come back immediately with the action menu. It makes no difference how long the TV's on anywhere from a couple minutes to several hours. I have taken the back off and inspected for bad connections or burnt spots and cleaned out a lot of dust with soft brush on vacuum. noticed the chassis board? was not aligned in grooves but all buttons were making contact with appropriate component on board. Any ideas?

BL_Thompson
TV Repair Authority

Feb 20, 2003, 5:55 PM

Post #2 of 9 (1097 views)
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Re: [SteadyShot] Panasonic CT27G11U off & on by itself [In reply to]	Can't Post

Try resoldering the power relay, whether the connections look bad or not.
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Bryan Thompson
Spyder Byte Services
Albuquerque, NM

RRoss
Unregistered User
rross@cfl.rr.com

Mar 1, 2003, 11:15 AM

Post #3 of 9 (1069 views)
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Re: [SteadyShot] Panasonic CT27G11U off & on by itself [In reply to]	Can't Post

I have a 1996 CT35G21U that has started doing the same thing. I thought a neighbor had a control that was doing it to the TV but that was not it. Did you fix yours by resoldering the relay?

SteadyShot
Novice

Mar 2, 2003, 7:38 AM

Post #4 of 9 (1065 views)
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Re: [BL_Thompson] Panasonic CT27G11U off & on by itself [In reply to]	Can't Post

Thanks for the response and advice, I tried this repair then thought I'd wait a week befor responding to make sure it worked. It did work for 8 days then on the 9th day it started again. All I did was heat up the solder til it melted and added new solder. Today I am going to remove the old solder, clean up the terminals and resolder again. I will repost in about a week to let you know if it worked. Does this sound like a good plan? If the problem continues after this should I replace the relay?

Thanks againSteadyShot

Try resoldering the power relay, whether the connections look bad or not.

SteadyShot
Novice

Mar 2, 2003, 12:50 PM

Post #5 of 9 (1062 views)
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Re: [SteadyShot] Panasonic CT27G11U off & on by itself [In reply to]	Can't Post

Well it didn't take a week this time! T.V. was on for 3 hours and then blinked off. a rap on the plastic front brought it back immediately with the action menu showing.

Should I replace the power relay?

It's got a really nice picture I'd hate to replace the T.V. but also hate to start replaceing parts without a good idea what's wrong! SteadyShot

BL_Thompson
TV Repair Authority

Mar 3, 2003, 7:05 AM

Post #6 of 9 (1057 views)
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Re: [SteadyShot] Panasonic CT27G11U off & on by itself [In reply to]	Can't Post

The most common problem in those sets is bad solder on the power relay, but it sounds like you've got bad solder joints elsewhere. I seriously doubt it's a bad relay. Inspect the board carefully... especially the horizontal drive transformer. I'm sure you will find a bad solder joint somewhere. Try tapping around with an insulated stick... you should be able to narrow it down that way.
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Bryan Thompson
Spyder Byte Services
Albuquerque, NM

SteadyShot
Novice

Mar 3, 2003, 8:53 AM

Post #7 of 9 (1056 views)
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Re: [BL_Thompson] Panasonic CT27G11U off & on by itself [In reply to]	Can't Post

Thanks, I'll try that this afternoon! Solder is certainly cheaper than relays etc..

SteadyShot
Novice

Mar 4, 2003, 5:22 PM

Post #8 of 9 (1047 views)
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Re: [SteadyShot] Panasonic CT27G11U off & on by itself [In reply to]	Can't Post

Well I'm not having much luck with it. It's turning itself off & on again. I've resoldered all the solder joints but it's still off and on now it seems to be acting up after it's been on for an hour or more. Is there anything else I should try?

SteadyShot

Dick
Unregistered User
r-m-ross@cfl.rr.com

Mar 5, 2003, 2:38 AM

Post #9 of 9 (1044 views)
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Re: [SteadyShot] Panasonic CT27G11U off & on by itself [In reply to]	Can't Post

Thanks you very much for the advice! The relay solder looked fine until I got out the magnifying glass. I could see that that the solder had a fractured ring around the lead on both control leads (big leads were fine. I had to bend one lead over to touch the board to get a good solder joint as there was a large gap between the lead and the solder trace on the board. I noticed the same problem on another part near by and resoldered that joint also. Set works perfectly now. Thanks again. Has been working fine for two days and I believe it is fixed.

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