Studiomaster powerhouse vision 12

What makes you think there is the making of 1 full amp, in that collection?

Hi,

I received this desk in bits, literally, in a huge bag and have slowly been rebuilding it. There were a number of different revision boards probably from other studiomaster desks in the bag also.

The modules I,ve used in the desk are as follows

Control/graphics R1A8 - 2

Power amps R1A5 - 4

Aux board R1A9 - 1

PSU R1A1 - 4

Insert pcb R1A3 - 4

The problem I have is no sound from the power amps.

I have traced the l&r signals from the "Amp" volume control on the Aux board to CONN 2 (14W) pins 9 and 10 which then goes via ribbon cable to the control/graphics board CONN 6 pins 9&10 labeled as

According to the many studiomaster schematics I managed to find the signal then leaves the control/gfx board via CONN 2 a 14 WAY to the insert board and PSU board for splitting to the power amps.

Thing is, CONN 2 on the c/g board is 16 WAY, it has to be as the connectors on the insert board and psu are also 16 WAY and here lies the problem.

The power amps are expecting the I/P on their CONN 1's pins 9&10 ( IN- , IN+ ) Not AMP-L ( or AMP-R )!!!

I was thinking the c/g board was the wrong revision. The only schematics I have for the C/G board are for R8C8B-3.

Any ideas folks?

thank you,

Night...

____

Hi,

I received this desk in bits, literally, in a huge bag and have slowly been rebuilding it. There were a number of different revision boards probably from other studiomaster desks in the bag also.

The modules I,ve used in the desk are as follows

Control/graphics R1A8 - 2

Power amps R1A5 - 4

Aux board R1A9 - 1

PSU R1A1 - 4

Insert pcb R1A3 - 4

The problem I have is no sound from the power amps.

I have traced the l&r signals from the "Amp" volume control on the Aux board to CONN 2 (14W) pins 9 and 10 which then goes via ribbon cable to the control/graphics board CONN 6 pins 9&10 labeled as

According to the many studiomaster schematics I managed to find the signal then leaves the control/gfx board via CONN 2 a 14 WAY to the insert board and PSU board for splitting to the power amps.

Thing is, CONN 2 on the c/g board is 16 WAY, it has to be as the connectors on the insert board and psu are also 16 WAY and here lies the problem.

The power amps are expecting the I/P on their CONN 1's pins 9&10 ( IN- , IN+ ) Not AMP-L ( or AMP-R )!!!

I was thinking the c/g board was the wrong revision. The only schematics I have for the C/G board are for R8C8B-3.

Any ideas folks?

thank you,

Night...

____

-- Hi Gareth,

As I said before, The Connector on the AUX board is 14 Way. The connector on the insert board is 16 Way as is the connector on the PSU.

This desk has no MIDI

So the output from the Aux board must go to the 14 Way i/p skt on the cont/grafx board

It's just that even though the output connector on the cntr/grafx board is 16 Way it has different pinouts from the other two.

I'm going to have to do some splicing to the ribbon.

Wish I could attach some drawings .

cheers :)

FYI, the "Control/Graphics" board is the top panel board with all the graphic eq sliders on it, the board with the display on it is called the "Display proccesor"...