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Yamaha C4 preamp fault. Hum. Phono switches.

I have a similar tester that would be able to show that. Might be good enough. Did you match the left and right pairs to each other too or just the two that make up one channel?
 
Since this thread is the place to go for sharing replacement parts for the Yamaha Preamps, I wanted to share my replacement for the reed relays. They are generally pretty reliable being a sealed part, but I had one that seemed to be intermittently making poor contact so I made this:

A simple PCB that fits within the footprint of the original RL-6442-H132 reed relay to adapt a modern DIP package replacement like a Littelfuse HE722A1200

20230311_111806.jpg 20230311_112107.jpg 20230311_112336.jpg 20230311_111759.jpg 20230311_114344.jpg 20230311_120521.jpg 20230311_114303.jpg
 
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DarkTiger892 said:
Since this thread is the place to go for sharing replacement parts for the Yamaha Preamps, I wanted to share my replacement for the reed relays. They are generally pretty reliable being a sealed part, but I had one that seemed to be intermittently making poor contact so I made this:

A simple PCB that fits within the footprint of the original RL-6442-H132 reed relay to adapt a modern DIP package replacement like a Littelfuse HE722A1200

View attachment 2825043 View attachment 2825044 View attachment 2825045 View attachment 2825046 View attachment 2825047 View attachment 2825048 View attachment 2825049
Click to expand...


Awesome!!!

Nashou
 
DarkTiger892 said:
Since this thread is the place to go for sharing replacement parts for the Yamaha Preamps, I wanted to share my replacement for the reed relays. They are generally pretty reliable being a sealed part, but I had one that seemed to be intermittently making poor contact so I made this:

A simple PCB that fits within the footprint of the original RL-6442-H132 reed relay to adapt a modern DIP package replacement like a Littelfuse HE722A1200

View attachment 2825043 View attachment 2825044 View attachment 2825045 View attachment 2825046 View attachment 2825047 View attachment 2825048 View attachment 2825049
Click to expand...
Amazing work. I have a request for you. I recently sold a Yamaha A1 to a guy. After a few months, he approached me to ask if I could fix it for him, as the sound was falling out of the left channel. I found that there is a problem with this relay. Could you please provide a gerber file for the production of this reduction circuit board? Thank you for your reply.
 
DarkTiger892 said:
Since this thread is the place to go for sharing replacement parts for the Yamaha Preamps, I wanted to share my replacement for the reed relays. They are generally pretty reliable being a sealed part, but I had one that seemed to be intermittently making poor contact so I made this:

A simple PCB that fits within the footprint of the original RL-6442-H132 reed relay to adapt a modern DIP package replacement like a Littelfuse HE722A1200

View attachment 2825043 View attachment 2825044 View attachment 2825045 View attachment 2825046 View attachment 2825047 View attachment 2825048 View attachment 2825049
Click to expand...
Gerber files for the PCB?
 
Peter19500 said:
Amazing work. I have a request for you. I recently sold a Yamaha A1 to a guy. After a few months, he approached me to ask if I could fix it for him, as the sound was falling out of the left channel. I found that there is a problem with this relay. Could you please provide a gerber file for the production of this reduction circuit board? Thank you for your reply.
Click to expand...
Did you receive the files?
 
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