Turns out this was not the manual i was looking for. The concertmate 670 keyboard i have is a "Realistic" model made for Radio Shack and none of the diagrams on the owners manual i received matches up. HOWEVER, I must say the service Owners Manual provides was fast and efficient by being available online. The manual was in good readable condition and easily downloaded.
Thank you for your manual It has the basic things to and i use the Oszi for Longer Time.
THX
Text excerpt from page 20 (click to view)
THE MACKIE FIXER � MACKIE DESIGNS SERVICE NEWS
To make Aux 3/5 and Aux4/6 Pre-EQ and Pre-Fader Aux 3/5 1. Cut the trace between the round and square pads at point D on the channel to be modified. 2. Solder an insulated jumper wire from the square pad at D to the square pad at F on the same channel. 3. Repeat for other channels as required. Aux 4/6 1. Cut the trace between the round and square pads at point E on the channel to be modified. 2. Solder an insulated jumper wire from the square pad at E to the square pad at F on the same channel. 3. Repeat for any other channels as required. To make Aux 3/5 and Aux4/6 Post-EQ and Pre-Fader Aux 3/5 1. Cut the trace between the round and square pads at point D on the channel to be modified. 2. Solder an insulated jumper wire from the square pad at D to the square pad at B on the same channel. 3. Repeat for other channels as required. Aux 4/6 1. Cut the trace between the round and square pads at point E on the channel to be modified. 2. Solder an insulated jumper wire from the square pad at E to the square pad at B on the same channel. 3. Repeat for any other channels as required.
bottom of main board
Area of interest for one channel. (Move along the board sideways to do the other channels)