| Author |
Thread: Vintage amplifier troubles |
    
matt with a capital P Unregistered guest |
| Posted on Friday, July 23, 2004 - 10:34 pm: |
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Hello everyone,
I have a Technics SA-103 stereo amplifier (Its done me proud for years now), this morning I was listening to music with the volume just below half way (mind you that is preety loud) after a few Rap songs with bass I noticed smoke coming out of one of my speakers so I turned everything off including power, after this I re-connected everything exept the burnt out speaker and turned everything on, now the sound is all distorted and turning the volume knob has no effect on the volume what so ever.
I did notice after un hooking everything the heatsink and power transformer inside were very hot, I thought my amp might be in protect mode untill things cooled down but after waiting 3 hours it still sounds crap.
I checked all the capasicators inside and they look fine none are leaking or look blown, the fuses are still good and everything looks fine...
Soooooooo...ooooo....oooo what happened? |
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J. Vigne Unregistered guest |
| Posted on Saturday, July 24, 2004 - 11:53 am: |
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May I ask HOW you checked if the caps were leaking? |
matt with a capital P Unregistered guest |
| Posted on Saturday, July 24, 2004 - 07:02 pm: |
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I opened the case and looked at them (I've seen leaky capasicators before, black fluid?)
Might I add the amplifier is still getting power and and all the lights work still, but I have a sneaky suspicion the speaker channels are not working properly. Tell me can it be fixed? |
Silver Member Username: Soccer
Post Number: 235
Registered: Apr-04
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| Posted on Saturday, July 24, 2004 - 08:00 pm: |
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Just a question of figuring out which amplifying stage is gone. Do you still have headphones sound right? |
matt with a capital P Unregistered guest |
| Posted on Saturday, July 24, 2004 - 09:11 pm: |
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I'm not sure about the headphones because the plug it needs is old school and I dont have a set old enough to fit. But yeah basically theres a minimal amount of sound coming through the speakers and its preety crappy sound. |
Silver Member Username: Soccer
Post Number: 239
Registered: Apr-04
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| Posted on Sunday, July 25, 2004 - 12:08 pm: |
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If you have sound on the headphones (good sound), the power devices are gone. You must check this. |
matt with a capital P Unregistered guest |
| Posted on Monday, July 26, 2004 - 03:07 am: |
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How do i check the power device? |
Unregistered guest |
| Posted on Monday, July 26, 2004 - 05:02 pm: |
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I have a MARANTZ 2325 receiver 125 watts per channel. I came home from work the other day and it was making a loud buzzing sound. Regardless of component the only sound is the loud buzz. Could my amp be fried. I bought this new in 1976 it has been a great piece of equipment. Any suggestions? |
Unregistered guest |
| Posted on Monday, July 26, 2004 - 05:03 pm: |
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I have a MARANTZ 2325 receiver 125 watts per channel. I came home from work the other day and it was making a loud buzzing sound. Regardless of component the only sound is the loud buzz. Could my amp be fried. I bought this new in 1976 it has been a great piece of equipment. Any suggestions? |
Silver Member Username: Soccer
Post Number: 243
Registered: Apr-04
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| Posted on Monday, July 26, 2004 - 08:48 pm: |
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I meant you must check for good sound on the headphones |
matt with a capital P Unregistered guest |
| Posted on Tuesday, July 27, 2004 - 12:22 am: |
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Ok its exactly the same from the head phone plug. |
Silver Member Username: Soccer
Post Number: 250
Registered: Apr-04
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| Posted on Tuesday, July 27, 2004 - 08:39 am: |
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So, bad sound everywhere, looks like your power supply is gone or you have overdriven the inputs |
matt with a capital P Unregistered guest |
| Posted on Tuesday, July 27, 2004 - 11:36 pm: |
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How could I of overdriven the inputs?
Are power supplys replacible? |
