phantombox
Member
- Joined
- May 4, 2012
- Messages
- 23
Hello guys.
Another friend gave me a BSS DPR-402 compressor, again to see if I could put it back in business. After connecting the BSS to a console (DI-box with a cable and my finger on the compressors input), I could hear a whistling-ish sound on one channel and nothing on the other side. No reaction whatsoever to any messing around with the controls.
I do have a schematic but it is a scanned document in low resolution so you really cannot read the detailed writing. Also, op-amps and other ICs are unspecified in this document, I guess it is the same that's available on this forum.
On the real circuit board are a few ICs that are made unrecognizable (covered with paint, on purpose!). These are IC5 (DIP16) on the upper board and IC9 and 24 (both DIP14) on the lower board. All other of the DIP14 ICs (also painted over) appear to be MC14066B, and there are 2 ICs LM3915N (clearly visible) on the upper board. All op-amps are LF353N.
There is a DIP8 socket on each channel with no IC in it (and no ID anywhere next to it), the strange thing is that V+ and V- on these sockets is pins 3 and 7 and pins 4 and 5 respectively, I never came across this configuration before. Maybe that's the reason for being empty sockets...
If anyone could identify the painted ICs, and confirm that MC1406B is the correct number, that would be great.
Also, any hint as what to look for.
Thanks a lot in advance.
I still have quite some testing to do on this gear.
Another friend gave me a BSS DPR-402 compressor, again to see if I could put it back in business. After connecting the BSS to a console (DI-box with a cable and my finger on the compressors input), I could hear a whistling-ish sound on one channel and nothing on the other side. No reaction whatsoever to any messing around with the controls.
I do have a schematic but it is a scanned document in low resolution so you really cannot read the detailed writing. Also, op-amps and other ICs are unspecified in this document, I guess it is the same that's available on this forum.
On the real circuit board are a few ICs that are made unrecognizable (covered with paint, on purpose!). These are IC5 (DIP16) on the upper board and IC9 and 24 (both DIP14) on the lower board. All other of the DIP14 ICs (also painted over) appear to be MC14066B, and there are 2 ICs LM3915N (clearly visible) on the upper board. All op-amps are LF353N.
There is a DIP8 socket on each channel with no IC in it (and no ID anywhere next to it), the strange thing is that V+ and V- on these sockets is pins 3 and 7 and pins 4 and 5 respectively, I never came across this configuration before. Maybe that's the reason for being empty sockets...
If anyone could identify the painted ICs, and confirm that MC1406B is the correct number, that would be great.
Also, any hint as what to look for.
Thanks a lot in advance.
I still have quite some testing to do on this gear.
