Help bring my Yamaha A-1 back to life
I recently bought an A-1 off ebay.
Before I bought it, I asked the seller all the usual questions about its cosmetic and working condition. He told me it is perfectly fine and that he uses it everyday.
Only the front cover was broken off but he had the cover stored away and sent it out to me for a future repair if possible.
So I bought it.
It arrived a week later, powered it up and the front lights did not light up. No sound from any of the rear outputs either.
I can hear a slight hum coming from the transformers so I know they at least are getting power.
Initially I thought something simple like a wire came loose during trasnsit.
Removed the covers and checked the 7 fuses it has and all seem good.
Next I did a visual check of all wiring just in case some came loose during rough handling in transit, all checked out ok.
I then checked most circuit boards for cracks, or burnt/cracked components parts, all seem fine.
I have a good multimeter that I can use but I need expert guidance in exactly what to check next to find the source of the problem.
I am not an expert in the theory of electronics, but I am very handy with a soldering iron ( I have fully recapped a ca1000, and cx1/mx1 amps in the past, but they all working to start with)
But for this dead amp I probably need step by step guidance from the AK experts here.
Thanks in advance guys
I recently bought an A-1 off ebay.
Before I bought it, I asked the seller all the usual questions about its cosmetic and working condition. He told me it is perfectly fine and that he uses it everyday.
Only the front cover was broken off but he had the cover stored away and sent it out to me for a future repair if possible.
So I bought it.
It arrived a week later, powered it up and the front lights did not light up. No sound from any of the rear outputs either.
I can hear a slight hum coming from the transformers so I know they at least are getting power.
Initially I thought something simple like a wire came loose during trasnsit.
Removed the covers and checked the 7 fuses it has and all seem good.
Next I did a visual check of all wiring just in case some came loose during rough handling in transit, all checked out ok.
I then checked most circuit boards for cracks, or burnt/cracked components parts, all seem fine.
I have a good multimeter that I can use but I need expert guidance in exactly what to check next to find the source of the problem.
I am not an expert in the theory of electronics, but I am very handy with a soldering iron ( I have fully recapped a ca1000, and cx1/mx1 amps in the past, but they all working to start with)
But for this dead amp I probably need step by step guidance from the AK experts here.
Thanks in advance guys
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