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Hitachi TV switches off and back on randomly
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Guest
PostPosted: Fri Oct 21, 2005 6:34 pm    Post subject: Reply with quote
most common is dry jionts on ic 951
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William
Guest
PostPosted: Mon Nov 14, 2005 10:00 am    Post subject: Hatachi C28W4105N switching itself on and off Reply with quote
Anonymous wrote:
most common is dry jionts on ic 951


I've got the same problem. All the above suggestions above have been checked to no avail.

Has anyone solved this problem by finding any other fault.
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Dr Dave
Guest
PostPosted: Mon Nov 14, 2005 8:54 pm    Post subject: Hitachi tv's Reply with quote
Most models of that era have a Known fault of the Regulater IC going dry joint. Pads are very small and you need to clean away to enlarge B4 soldering
[email protected]
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William
Guest
PostPosted: Tue Nov 15, 2005 2:34 pm    Post subject: Re: Hitachi tv's Reply with quote
Dr Dave wrote:
Most models of that era have a Known fault of the Regulater IC going dry joint. Pads are very small and you need to clean away to enlarge B4 soldering
[email protected]


Thank you Dr Dave. I will put your recommendation to my repair man.
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guest
Guest
PostPosted: Thu Nov 17, 2005 6:34 am    Post subject: Int. going to Standby Reply with quote
Hello,
Apart from checking all stabiliser ICs', links (solder top and bottom), etc.and checking for poor connections, there was a mod., to add a spring from the top of the wire clamp on the LOPTX, to the heat sink of the line transistor -(this was for the set going into standby, but coming out, if switched on via the handset.)
Best of luck
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golden boy
Guest
PostPosted: Mon Nov 21, 2005 10:56 am    Post subject: hitachi C28WD2TN2 Reply with quote
My television is 5 years old, but has been turning itself on and off at random for a couple of years now. Just lately the problem has been getting worse. I twice emailed Hitachi who did not have the curtesy to reply. I telephoned them only to be told that this turning on and off of the television is a SAFETY feature indicating that there is something wrong with a component. They were quite willing to give the telephone number of a local authorised Hitachi engineer, but not willing to admit to a common fault of any sort.
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chrisholduk



Joined: 19 Nov 2005
Posts: 3
Location: Huddersfield
PostPosted: Mon Nov 21, 2005 4:28 pm    Post subject: Reply with quote
I have a new sony what did exactly the same thing,switching on and off randomly and it was just dry joints.
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Guest
PostPosted: Tue Nov 22, 2005 9:17 pm    Post subject: Re: Int. going to Standby Reply with quote
guest wrote:
Hello,
Apart from checking all stabiliser ICs', links (solder top and bottom), etc.and checking for poor connections, there was a mod., to add a spring from the top of the wire clamp on the LOPTX, to the heat sink of the line transistor -(this was for the set going into standby, but coming out, if switched on via the handset.)
Best of luck


guest, thank you.

My TV still switches itself off then switches itself back on again immediately. I've had a local TV repair man who soldered all the joints. This enabled the TV to be switched on easily with no problems, whereas before it was difficult to switch on. BUT now the TV STILL switches itself off and on at random. My repair man has given up on it, he says he can find nothing wrong.

Will the modification you suggest stop the fault on my TV?

Hatachi's offical service team wants seventy pounds sterling, call out charge before the start charging for any repair. I've rang them but they won't say what may be wrong.

All these people with same problem, I wonder if any others have the same problem even after soldering all joints as I have?
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Guest
PostPosted: Tue Nov 22, 2005 9:26 pm    Post subject: Re: hitachi C28WD2TN2 Reply with quote
golden boy wrote:
My television is 5 years old, but has been turning itself on and off at random for a couple of years now. Just lately the problem has been getting worse. I twice emailed Hitachi who did not have the curtesy to reply. I telephoned them only to be told that this turning on and off of the television is a SAFETY feature indicating that there is something wrong with a component. They were quite willing to give the telephone number of a local authorised Hitachi engineer, but not willing to admit to a common fault of any sort.


Golden Boy,

That's what they told me about 'safety'.

Please let me know if you get it fixed, and how.
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Guest
PostPosted: Wed Sep 06, 2006 7:55 am    Post subject: Reply with quote
inspiring responding augers eighteens deceitful brownies.
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