Did not anticipate nor hope for this...

[orange]

I opened my Yamaha CA-1000 thinking some fuses might be blown maybe and found my big Nippon Chemicon 10000 uF caps have halfpipes for little ants on top. Not Good.

(CAPS. RIGHT SIDE, LEFT AND FULL FRONTAL)

It's a good amp, despite the bad phono section. 70W/ch and really nice specs for a 1973 design!

Wouldn't mind having her sing again.​

 

[orange]

I think the main 5A fuse at the back may have a bit of heat damage although it doesn't look broken. I'll try that first. Those big caps don't look right though.

 

[Northwinds]

I opened my Yamaha CA-1000 thinking some fuses might be blown maybe and found my big Nippon Chemicon 10000 uF caps have halfpipes for little ants on top. Not Good.

View attachment 21977 View attachment 21978 View attachment 21979 View attachment 21980
(CAPS. RIGHT SIDE, LEFT AND FULL FRONTAL)

It's a good amp, despite the bad phono section. 70W/ch and really nice specs for a 1973 design!

Wouldn't mind having her sing again.​

They probably need to be changed though before they spew

 

[avionic]

I think the main 5A fuse at the back may have a bit of heat damage although it doesn't look broken. I'll try that first. Those big caps don't look right though.

There probably OK. The plastic disk on top is probably just warped from the heat off of the power transformer. The aluminum under the plastic is key. Is it domed or flat ? There are 2 ea.5A fuses. One is pigtailed in series with the panel mounted fuse holder. This is just in case some dumbass try's to put a larger fuse in the fuse holder.

 

[avionic]

I opened my Yamaha CA-1000 thinking some fuses might be blown maybe and found my big Nippon Chemicon 10000 uF caps have halfpipes for little ants on top. Not Good.

View attachment 21977 View attachment 21978 View attachment 21979 View attachment 21980
(CAPS. RIGHT SIDE, LEFT AND FULL FRONTAL)

It's a good amp, despite the bad phono section. 70W/ch and really nice specs for a 1973 design!

Wouldn't mind having her sing again.​

The bad phono is most likely a dirty switch. To get that switch cleaned I usually need to remove the switch and disassemble it.

 

[avionic]

There is also half a dozen or so . Fusible resistors that have change value and gone real high resistance. And most likely some small caps that have DC leakage.
The CA-1000 is a killer little Integrated when working properly. Class A is a bonus as well.

 

[avionic]

There are two micro switches that usually need attention. They tend to get carbon'd up or even melted or warped contacts due to switching from "class A" to "normal" mode while powered up. Omron has new drop in replacements from Mouser or Digikey.

 

[orange]

I was warned about that by the seller (TH's DaveInVA), don't recall touching that switch while powered and I avoid it in general.

I haven't touched the phono section, just haven't used it.

 

[avionic]

I was warned about that by the seller (TH's DaveInVA), don't recall touching that switch while powered and I avoid it in general.

I haven't touched the phono section, just haven't used it.

I replace them as more of preventive measure. So they don´t bite me in the ass down the road.

 

[orange]

I found the thread DaveInVA wrote on it from Tapeheads in 2012 before he sold it to me...the caps looked like I showed then as well, it was something about microswitches needing replacement and such but I think this is the thing to read...

http://www.tapeheads.net/showthread.php?t=19777