The owner's manual/operating instructions that I purchased was the original factory document and it was in at least three and maybe more languages. I no longer have it because I sold the tape recorder and included the owner's manual/operating instructions and a service/repair manual that I bought on ebay for the new owner.
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.
Great price, Quick delivery, the document was very usefull A+++++++++++++++
Text excerpt from page 35 (click to view)
Once you have set the surround modes, you can use the same adjustment every time you want to activate the surround you want. The receiver memorizes surround adjustments for each mode. Note: When you select �DVDMULTI� as the source to play, you cannot select or adjust the surround mode. On the front panel:
DAP/SURROUND MODE
1. Press DAP/SURROUND MODE so that the Control % / � / @ / # buttons work for selecting the DAP/surround modes. The lamp next to the button lights up. 2. Press Control @ / # to select the surround mode. The SURROUND indicator lights up on the display. Each time you press the button, the DAP and surround modes alternately come into effect. 3. Press Control % / � until the surround mode you want appears on the display. Each time you press the button, the surround modes change as follows (the indicator of the selected surround mode also lights up on the display):
PROLOGIC SURR OFF
(Surround Off)
3CHLOGIC THEATER2 THEATER1
PROLOGIC: 3CHLOGIC: THEATER1:
Select this mode to watch a video source with Dolby Surround when you have connected the rear speakers (and a center speaker). Select this mode to watch a video source with Dolby Surround when you have connected a center speaker and no rear speakers. Select this mode to watch a video source with Dolby Surround when you have connected the rear speakers (and a center speaker). This mode gives you the feeling of a small movie theater with a seating capacity of 100. Select this mode to watch a video source with Dolby Surround when you have connected the rear speakers (and a center speaker). This mode gives you the feeling of a large movie theater with a seating capacity of 1000. No surround mode is applied.
Front panel
THEATER2:
SURR OFF:
DAP/SURROUND/DVD MULTI ADJUST
4. Press DAP/SURROUND/DVD MULTI ADJUST so that the Control % / � / @ / # buttons work for adjusting the surround mode. The lamp next to the button lights up.