After approximately 80 minutes of watching TV (regardless of the source), my Technics audio receiver will have moments of "mute" of approximately 3 seconds, at regular but increasing intervals (more and more frequents). It starts at once every minute or so, and increases to once every 15-20 seconds. All my devides are plugged in my TV via HDMI, and my TV is connected to my receiver via an optic cable. If I leave the TV speakers on, they keep going when my receiver stops, to the problem is either in the cable or the receiver. Since the problem is agravating after some time, I'm thiking overheating. Defective fan, maybe? Thanks!
Hi i just would to know if you did try to connect your TV by HDMI to test if your optical output of your reciever/amplifier have some problem. In second time yes maybe you can have an overheating problem, just take a look at your grid and maybe a clean-up will be necessary. I don't think your amplifier have a fan.
Don't hesitate to contact me here in this post. have a nice day.
Testimonial: "Hi Fabrice. Thanks for your answer. Did you mean "optical input"? My cable terminal and PS4 are connected to my TV via HDMI, and my TV is connected to the amplifier's input via optical cable. So you suggest connecting straight from the cable terminal to the amplifier via HDMI? The fact that the problem only occurs after approximately 80 minutes, and then repeats itself, made me think it couldn't be a cable problem. I don't know that I cable can get "tired" - stop working after a long use. I might not have selected the exact same model of Technics amplifier, althought it does look the same, but my amp does have a fan. It's attached to the rear left side. I can see the paddles/blades and they don't seem to be turning."
Ok I didn't the problem is the optical cable but the optical bloc inside your amplifier, it's why you have to try an another way like the HDMI port.
And i forgot something else if your fan doesn't turn it's probably a overheating problem. So you have to open your amplifier if you seem to do it and check the power in the input of your fan. If the power come in so you have to replace this fan. If you wouldn't open your amplifier you have to go to a repairshop. So if you want more with me don't hesitate, have a nice day.
I'll look at these possibilities tonight. Maybe the fan only kicks in when volume is higher than a certain level, I'll check that too.
Could it be that the speakers I use are a bad match for the amp, and the amp "cuts off" as a protection? I'm pretty sure I checked that they were a match impedence-wise, but maybe there's something else I overlooked. Do you think I should test it with different speakers?
I don't think about e real problem with your speakers. the overload protection should be start earlier than 80mn
OK so I've tried multiple combinations of inputs and speakers, and the problem happens with every one of them, unless I remove the casing of the amplifier. I guess I'm really looking at overheating... I've checked the manual of my amp (which is a 1050 btw, not a 750) and it says the fan will only run if the amp has to provide a really high output. Now I haven't seen it start so far, so I'm wondering if it is defective, or if the amp has not reached it's output level. Is there a way I can verify this? Also, is there a way I can have it work full time? I've been told overheating is likely to be caused by a bad weld. Is there a way to spot a bad weld that would cause overheating? Thanks for your help.
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SOURCE: Technics SA-DX930. I ran digital optical cable
If the only thing not working is the optical input, it is possible that the optical converter is defective. Without seeing the actual unit and testing the IC, I can't say for sure. If you have test equipment, let me know and we will attempt to track this down.
Dan
SOURCE: digital optical output for technics 5.1 surround sound receiver
I went to the HDTV plasma manual. It stated the only way the digital optical audio output would work (from this TV) was to go to the menu, select audio and turn off the TV speakers. Basically, it had nothing to do with the technics receiver.
Testimonial: "worked like a champ!"
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I've tried multiple combinations of inputs and speakers, and the problem keeps happening, unless I remove the casing of the amplifier. I guess we are really looking at an overheating problem. 2 things I'm wondering now: the instruction manual of my amp (a 1050 btw) says the fan will only start when high output is requested. It doesn't start, but how can I know if the fan is defective, or if the amp hasn't reached its "venting point"? Also, I've been told that overheating is likely caused by a bad weld. Is there a way to spot a bad weld? Thanks for your help.
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