Technical Service Bulletin.
sansui 8080 protection---of course
- Thread starter waggs098
- Start date
waggs098
Super Member
http://elektrotanya.com/sansui_8080_9090_sm.pdf/download.html
Here you can download a service manual. Are a service manual and a TSB different?
Here you can download a service manual. Are a service manual and a TSB different?
Damn. The very first reply to my very first post (which was about replacing the fusible resistors with metal film on that driver board) recommended not to use them over carbon unless I knew what I was doing, which of course I didn't. Should I change the new carbon ones to metal film? Should I expect my driver board to go up in flames anytime soon?
Yes. The TSB is an update to the service manual.
The idea behind the fuseable resistors is twofold:
1. To prevent a fire (easily circumvented with a metal film resistor).
2. To protect components in the event of a catastrophic failure. Rarely does the addition of a fuseable resistor really help, since it takes a fusable resistor a few seconds to open up, but takes a semiconductor a few milliseconds to destroy itself when things go very wrong.
1. To prevent a fire (easily circumvented with a metal film resistor).
2. To protect components in the event of a catastrophic failure. Rarely does the addition of a fuseable resistor really help, since it takes a fusable resistor a few seconds to open up, but takes a semiconductor a few milliseconds to destroy itself when things go very wrong.
sushidelic
New Member
Just wanted to say big thanks to you guys, as i just brought a dead 8080 back to life by exchanging all the fusable resistors on the driver board according to this thread. Nearly half of them were off spec, now it's playing like charm again!
Best regards,
Michael
Best regards,
Michael
