|
|
|
|
|
Roland RS-09 SAD512 Replacement |
September 16, 2017 |
Reviewer:
Joshua Lewis from Baltimore, MD United States
|
|
I bought four of these to restore a Roland RS-09 with failed SAD512 BBD chips.
They needed the input bias adjusted to work in this circuit.
I added 7kOhm in parallel with the R3160 resistor to bring the DC input offset up to ~7V.
I also removed all four R3168 resistors, which allows the R5106 to set the VBB node voltage internally.
Lastly, I removed all four R3172 resistors as pin 3 is spec'd as No-Connect for the R5106 as opposed to the SAD512.
I was a little skeptical about using these parts, but they turned out to work perfect for this application. Sounds great. Very satisfied. Would use again!
Ref: http://www.synfo.nl/servicemanuals/Roland/RS-09_V1_SERVICE_NOTES.pdf
Was this review helpful to you?
|
|
|
|
|
|