I got a CTC 187 in with a complaint that after five minutes or so the volume gradually decreases by itself. I was thinking possibly tact switches but someone else said that it could be a bad eprom. I was wondering how one might go about isolating this problem?. I ran this set for a few days and never noticed a problem with the sound. I was about to call the guy and have him pick it up and suggest that perhaps the problem was the cable box when I mistakenly went to bed one night and left it running in the shop. I woke up the next morning and realizing that the set was on the first thing I noticed was that there was no sound coming from the shop. I took a look at the screen and noticed that every 2 or 3 seconds a volume bar would appear then disappear as thouh the set was being addressed by either the front panel tact switch or the remote. The volume indicator would show the sound to be all the way down each time it would appear as it indeed was. I tried raising the sound up and although the volume bar appeared and it did increment up it then afterwards immediatly slowly incremented down by itself.agsin. I haven't opened this thing yet as I really wanted to confirm his complaint first. Now that I have and considering what I've observed, does anyone think that the presence of the volume bar points to a leaky tact switch? Or could the volume bar and subsequent function activation be initiated by either a bad T chip or the processor? . I guess what I'm wondering is if there is any way that the set could produce a volume bar without the appropriate infrafed signal coming through the IR receiver or the chip being addressed directly through the tact switch? Thanks, Lenny
- posted
13 years ago