Re: Any ideas on this? please.
- From: bhaskar1996@xxxxxxxxx
- Date: 8 Jan 2007 08:44:35 -0800
Hi,
I think the problem is with the HT Flashover. Due to this the SMPS
sees a sudden pull of current and switches off everything. In fact iam
working with Philips and Philips Monitors also have similar problems.
Good Luck.
Bhaskar.
Tim wrote:
Hi all,
I am hoping someone here may be able to help me with solving an intermittent
fault with our family TV
It is a Phillips 21PT2012 / 79R and has what I think is the serial number
of BZ000231 723707 on the back cover.
The fault manifests itself as sudden loss of all picture, and light from the
screen and loss of sound at the same time, anywhere from 5 seconds to a few
minutes from switch on.
This started a week or so ago, and a turn off seemed to fix it, and now it
will not run longer than a minute or so without dying. It seems like the HT
supply drops out suddenly,
but as I understand it the power supply rails for all the circuitry on this
type of appliance may very well all come from one switching supply, and a
fault there could wipe out everything?
I have a reasonable understanding of electronics, and a good Fluke
multimeter, but no cct. diagram, and no experience with TVs. Any
suggestions? I think that the set is about 4 years old, and I guess it must
be some component that is built to a commercial standard starting to break
down, but I was hoping that there may be hope rather than junking it?
Thanks for any assistance.
Tim
.
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- Any ideas on this? please.
- From: Tim
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