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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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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. |
#2
Posted to sci.electronics.repair
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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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