Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Default Weird RCA TV Problem

Hi,

I finally found something that may be the cause of this problem. I will
report back in a week or so after I confirm it.

This was the first test I performed on this TV, which "past the test".
I used a capacitor tester's "leak" test (very sensitive) set at 50V and
checked all the button switches. Absolutely no sign of "leakage".
I won't tell you all the other things I did. Sometimes it pays to re-test.

This time, when the TV started it's off/on "ritual" again, I unplugged the
TV and I performed another "leak" test on the button switches.
Wow!!! now I have a "leak" indication. Imagine, an intermittent "leak"!!!
I opened the circuit trace to all the button switches. Now, I will use the
remote control on this TV for the next week or so to confirm. Please
"stay tuned".
Brad

On Mon, 19 Nov 2007 18:31:55 GMT, in sci.electronics.repair you wrote:

Hi,

Has anyone fixed a late model TV (mfg 2005/2006) with this problem:

You turn on the TV, after the screen lights up, etc. the TV turns itself off.
About 5 seconds later, the TV turns itself on, etc. You have to pull the
plug to stop the off/on cycle. Sometimes, you turn on the TV and it will
play for a while before this off/on cycle begins.

IMPORTANT: The TV may work just fine for a few days, then it happens.
Eventually, the TV begins to work fine again for another two or three days
before it happens again.

I have serviced TVs for years and I performed many tests on this
RCA TV, chassis M134C (mfg 01/06).

I thought about replacing the micro or the eeprom, but I could be
wasting my time and money?

Thanks in advance, Brad

Before you type your password, credit card number, etc.,
be sure there is no active keystroke logger (spyware) in your PC.


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Art Art is offline
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Posts: 195
Default Weird RCA TV Problem

Possible leaky clamping diode? Been nemises in many wierd problems, not
only with Rica Sets!!
"Brad" wrote in message
...
Hi,

I finally found something that may be the cause of this problem. I
will
report back in a week or so after I confirm it.

This was the first test I performed on this TV, which "past the test".
I used a capacitor tester's "leak" test (very sensitive) set at 50V and
checked all the button switches. Absolutely no sign of "leakage".
I won't tell you all the other things I did. Sometimes it pays to
re-test.

This time, when the TV started it's off/on "ritual" again, I unplugged
the
TV and I performed another "leak" test on the button switches.
Wow!!! now I have a "leak" indication. Imagine, an intermittent
"leak"!!!
I opened the circuit trace to all the button switches. Now, I will use
the
remote control on this TV for the next week or so to confirm. Please
"stay tuned".
Brad

On Mon, 19 Nov 2007 18:31:55 GMT, in sci.electronics.repair you wrote:

Hi,

Has anyone fixed a late model TV (mfg 2005/2006) with this problem:

You turn on the TV, after the screen lights up, etc. the TV turns itself
off.
About 5 seconds later, the TV turns itself on, etc. You have to pull the
plug to stop the off/on cycle. Sometimes, you turn on the TV and it
will
play for a while before this off/on cycle begins.

IMPORTANT: The TV may work just fine for a few days, then it happens.
Eventually, the TV begins to work fine again for another two or three days
before it happens again.

I have serviced TVs for years and I performed many tests on this
RCA TV, chassis M134C (mfg 01/06).

I thought about replacing the micro or the eeprom, but I could be
wasting my time and money?

Thanks in advance, Brad

Before you type your password, credit card number, etc.,
be sure there is no active keystroke logger (spyware) in your PC.




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