Technics SU V505 problems

[SVI2004A]

That is it’s p/n

In this set RLY301 (SS107) is output relay
RLY601 is (SS109) Tap select (controlled from impedance detector)

I’d look through Farnell and see if any have tha same pin layout/measurements

Think theses someone on Ebay selling equivalents... don’t know how good they are

 

[dynoPort]

As I use it I somehow don't think it is the relay, it seems that a component or two is a bit sluggish and needs the turn of the volume control to give them a 'kick'
once the sound is OK it stays OK.

 

[SVI2004A]

I’d put my money on RLY301

 

[mjona]

I have a technics receiver amplifier that had a problem with relays cutting out the sound.

The relay in question was quite large and gave a fairly loud click when switching. Over the years the action of doing this was enough mechanically to affect the solder joins with the pcb. I found that by pressing the pcb gently in the area close to the relay.

 

[dynoPort]

The relay is a sealed type so it cannot be opened to be cleaned

 

[mjona]

Before rushing out to buy a new relay which will involve removing the old one anyway, think like a serviceman who would take the board out and remake the solder joins which may have gone cold which is not uncommon in causing faults and test continuity of the tracks around the suspect component just to make sure that replacement is necessary.

 

[ssi]

Hi


I have one of these amps and when I first got it the relay was clicking on and off depending on where you poked the board. It was a cold solder joints for my fix.



Those relays are usually pretty solid in themsleves......