Hi,
I am new to AK, but I visited the forums several times to read reviews and user experiences on popular receivers and speakers. Thank you all for the wealth of information shared in these forums.
I got myself a used A-1000 (1984) that is in good cosmetic condition but is stuck in protection mode (.... doesn't seem like such a good idea in retrospect
). I plan to work on it over the next few weeks (and months, if required) and get it working properly.
I have gone through previous threads on the subject, especially these two:
A 1000 No sound
troubleshooting a Yamaha A-1000
and gathered quite a bit of information (and many thanks to all the contributors). And I downloaded both the owner's & service manuals from the web. I want to run my plan by you once before I start messing with this nice amp.
Problem description: Amp powers up, all lights & buttons work but no sound. Relay does not click.
Amp Condition: The outside of the amp looks very good (for its age). The insides are dirty, there is a thin layer of dust on everything and even some cobwebs in the corners. Clearly it was out of use for quite a while. But, thankfully, no nicotine build-up or smell. Visual inspection does not reveal any burnt or damaged components.
My plan:
1) Dust off the insides properly.
2) Clean/wipe down the boards and components with Isopropyl Alcohol (92%)
3) Check all fuses
4) Verify the voltages at the test points and at the relay coils (as described in the threads referenced above)
5) Check grounding (this seems to be common issue on these amps)
6) Identify & replace components that are damaged or not performing to spec. I know its this last point that is key.
It has been over fifteen years since I last held a soldering iron, but I am hoping it will come back to me once I get started. I am going to take it slow-n-easy and do it right. And I am hoping this forum will guide me once I reach point 6.... I guess it is wishful thinking to hope that it will turn out to be something simple like blown fuses
So, am I on the right track? Have I missed anything? Is there is anything else that I can test/check to identify or narrow the source of the problem before I start pulling components for testing?
Will post pics once I am done with the cleaning.
Thanks!!
EDIT:
Forgot to mention, I really like Yamaha receivers. My home theater is powered by a HTR-7065 (the HTR version of RX-V773) hooked up to Infinity Primus speakers, and in my office room an old Yamaha RX-777 (the version before the more popular RX-797) does the duty with Pioneer BS41s. Never got to try Yamaha speakers though, too pricey for my taste.
I am new to AK, but I visited the forums several times to read reviews and user experiences on popular receivers and speakers. Thank you all for the wealth of information shared in these forums.
I got myself a used A-1000 (1984) that is in good cosmetic condition but is stuck in protection mode (.... doesn't seem like such a good idea in retrospect
). I plan to work on it over the next few weeks (and months, if required) and get it working properly. I have gone through previous threads on the subject, especially these two:
A 1000 No sound
troubleshooting a Yamaha A-1000
and gathered quite a bit of information (and many thanks to all the contributors). And I downloaded both the owner's & service manuals from the web. I want to run my plan by you once before I start messing with this nice amp.
Problem description: Amp powers up, all lights & buttons work but no sound. Relay does not click.
Amp Condition: The outside of the amp looks very good (for its age). The insides are dirty, there is a thin layer of dust on everything and even some cobwebs in the corners. Clearly it was out of use for quite a while. But, thankfully, no nicotine build-up or smell. Visual inspection does not reveal any burnt or damaged components.
My plan:
1) Dust off the insides properly.
2) Clean/wipe down the boards and components with Isopropyl Alcohol (92%)
3) Check all fuses
4) Verify the voltages at the test points and at the relay coils (as described in the threads referenced above)
5) Check grounding (this seems to be common issue on these amps)
6) Identify & replace components that are damaged or not performing to spec. I know its this last point that is key.
It has been over fifteen years since I last held a soldering iron, but I am hoping it will come back to me once I get started. I am going to take it slow-n-easy and do it right. And I am hoping this forum will guide me once I reach point 6.... I guess it is wishful thinking to hope that it will turn out to be something simple like blown fuses
So, am I on the right track? Have I missed anything? Is there is anything else that I can test/check to identify or narrow the source of the problem before I start pulling components for testing?
Will post pics once I am done with the cleaning.
Thanks!!
EDIT:
Forgot to mention, I really like Yamaha receivers. My home theater is powered by a HTR-7065 (the HTR version of RX-V773) hooked up to Infinity Primus speakers, and in my office room an old Yamaha RX-777 (the version before the more popular RX-797) does the duty with Pioneer BS41s. Never got to try Yamaha speakers though, too pricey for my taste.
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