Here are some pictures of my CA-2010 restore. When I bought it the channels cut out intermittently, the phono ground screw was snapped off, and a couple of the tone control knobs hung out at odd angles. It was clearly in need of a little -well, actually a lot - of love. It took longer than I had hoped to get her back on line but ultimately she is fixed up, working fine and is being actively listened too. Sounds very nice, too.
Deoxit cleaned up the channel dropouts and pops at the selector and tone controls. Avionic kindly suggested a phono ground replacement. All e-caps were replaced, except for the two big filter caps; I have replacements on hand for them now, but they will have to wait, I wanted to start using the darned thing.
Let's see, what else....I replaced the lamps with LED's. Both relays were replaced, this was a minor PITA, since they were not drop-in. The VD1212's were replaced with 1N1418's. One of the phono input traces was munged, so I addressed that. Schematic/amp mismatches: one of the axial caps on the coupler circuit board did not match the schematic, there were also some caps on the function board that did not match, so you will want to to check those before ordering.
The biggest challenges were the main amp boards. At one point a few of the metal tabs where the wires are attached just plain fell off the board, metal stress I guess. This lead to fuses blowing but fortunately no harm. On close inspection I could see someone had been in there before and re-soldered the other metal tabs, so this was an issue in the waiting. I also had amp problems that were not solved until I re-flowed all of the main amp solder joints, the heat from Class A operation must be responsible for this failure.
It was well worth all the time and effort. I really like how Yamaha built this amp, you can tell they put some money into the volume and tone controls. I have a Thorens TD-145 using Denon DL-103 MC cartridge hooked up and the phono section sounds very good.
Pictures follow, first the power board. I used a mix of Nichicon ES, HE and PW, and a couple Panasonic ECQ film caps (1uf/50v). You can also see the shiny new relay.
Deoxit cleaned up the channel dropouts and pops at the selector and tone controls. Avionic kindly suggested a phono ground replacement. All e-caps were replaced, except for the two big filter caps; I have replacements on hand for them now, but they will have to wait, I wanted to start using the darned thing.
Let's see, what else....I replaced the lamps with LED's. Both relays were replaced, this was a minor PITA, since they were not drop-in. The VD1212's were replaced with 1N1418's. One of the phono input traces was munged, so I addressed that. Schematic/amp mismatches: one of the axial caps on the coupler circuit board did not match the schematic, there were also some caps on the function board that did not match, so you will want to to check those before ordering.
The biggest challenges were the main amp boards. At one point a few of the metal tabs where the wires are attached just plain fell off the board, metal stress I guess. This lead to fuses blowing but fortunately no harm. On close inspection I could see someone had been in there before and re-soldered the other metal tabs, so this was an issue in the waiting. I also had amp problems that were not solved until I re-flowed all of the main amp solder joints, the heat from Class A operation must be responsible for this failure.
It was well worth all the time and effort. I really like how Yamaha built this amp, you can tell they put some money into the volume and tone controls. I have a Thorens TD-145 using Denon DL-103 MC cartridge hooked up and the phono section sounds very good.
Pictures follow, first the power board. I used a mix of Nichicon ES, HE and PW, and a couple Panasonic ECQ film caps (1uf/50v). You can also see the shiny new relay.
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