JVC 32" TV timer lite blinks
Hi;
This AV-32F704 was dropped initially. Repaired PCB cracks, now unit turns on, shuts down after 5 seconds and timer lite blinks once a second. Is that a diagnostic code ? There's HV, but no sound or pix. There's a white flash and you see a raster collapse when it shuts down. Thanks very much, Rick |
Was the TV working OK before it was dropped ?
If yes it still has cracked board . kip |
My guess is you don't have vertical deflection. Put a meter or scope on the
vertical wiring to the yoke and make sure you have vertical sweep present on one of the wires and not the other. Probably still have a crack. They can be elusive. |
"TA7205" wrote in message
... Hi; This AV-32F704 was dropped initially. Repaired PCB cracks, now unit turns on, shuts down after 5 seconds and timer lite blinks once a second. Is that a diagnostic code ? There's HV, but no sound or pix. There's a white flash and you see a raster collapse when it shuts down. Thanks very much, Rick Hi Rick, Almost certainly the unit is going into protection mode. I am not familiar with your model as it's for the US market only. But I have seen this before with JVC. It is a common practice for JVC TV's to go back into stand-by when a problem is detected, usually with the LED blinking at 1 second or 1/4 second intervals, depending on the model and the number of protection circuits. Usually it is not possible to switch the unit back on, you must unplug the power cord, wait a short time then plug the cord back in again. This is a very good indication protection circuit thinks something is wrong! I suggest you look for cracks around the high voltage transformer. Pay special attention to the fine tracks on the PCB, some of these lines are used for x-ray protection. James -- Please Note - E-mail address corrupt. Please change "NO" to "ii" |
Thanks for your help on this one.
I did find a good vertical signal at the yolk (only one wire) Also, The micro is running. It has 12V, 9V and 5V supplies running. It's got HV, so I know the horizontal is working. I've scoured this board with a fine tooth comb looking for hidden fractures. I'll keep working on it. Thanks again, Rick |
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