BarryJ
New Member
My story.
Over the last couple of days a friend asked me to look at his garage sale purchased Sansui D-90 tape deck. He's had it for five years and it's never ran. I found a misaligned leaf switch, the kind that has two flat pieces of flexible copper foil that are separated but when the "play" button is pressed, make contact and things run. I had a look, repositioned the switch, and it was all good! I returned the deck to my friend who was thrilled.
24 hours later he reports something happened and the magic smoke left the machine and now it powers up but nothing else. He brought it back to me.
Immediately I saw that that funky switch had somehow slipped and made contact with the metal body of the deck's chassis. The only damage I could see was to diode ZD601. It has markings IR 10E on the body. It was toast but there was no other obvious damage to anything I could see... no burn marks, no heat damage indications.
So I replaced it with an IN4007. So now what happens is when the "play" button is pressed the motor turns half a turn and stops. I measured voltage at the switch. It should be 14v DC... what I saw was a voltage that was building up from 0 to 14 and then when "play" is pressed... back to 0 - only to start to build up again again when the stop button is pressed.
Now the diode in question is a Shotzzkey. My question is... where do I find one of those suckers and would fitting that diode solve the voltage issue?
Any thoughts or suggestions would be appreciated.
Barry
Over the last couple of days a friend asked me to look at his garage sale purchased Sansui D-90 tape deck. He's had it for five years and it's never ran. I found a misaligned leaf switch, the kind that has two flat pieces of flexible copper foil that are separated but when the "play" button is pressed, make contact and things run. I had a look, repositioned the switch, and it was all good! I returned the deck to my friend who was thrilled.
24 hours later he reports something happened and the magic smoke left the machine and now it powers up but nothing else. He brought it back to me.
Immediately I saw that that funky switch had somehow slipped and made contact with the metal body of the deck's chassis. The only damage I could see was to diode ZD601. It has markings IR 10E on the body. It was toast but there was no other obvious damage to anything I could see... no burn marks, no heat damage indications.
So I replaced it with an IN4007. So now what happens is when the "play" button is pressed the motor turns half a turn and stops. I measured voltage at the switch. It should be 14v DC... what I saw was a voltage that was building up from 0 to 14 and then when "play" is pressed... back to 0 - only to start to build up again again when the stop button is pressed.
Now the diode in question is a Shotzzkey. My question is... where do I find one of those suckers and would fitting that diode solve the voltage issue?
Any thoughts or suggestions would be appreciated.
Barry