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 8 (click to view)
1: Input connector - Use this balanced female XLR connector to route line-level signal into the EX20. 2: Output VU meter - This three-segment bar meter shows the EX20 output level. For optimum signal-to-noise ratio, set the Volume control (see #6 below) so that program material is usually at or around 0 VU, with occasional but not steady excursions to the red â+3 dBâ segment. 3: Power switch - Use this to turn power to the EX20 on or off. 4: Voltage selector - Make sure this is set correctly for the country you are in before turning on the power to the EX20. 5: Battery VU meter - If an optional RB 2030 rechargable battery pack is
installed, this meter shows how much battery power remains as it is being charged (Power switch off) or depleted (Power switch on). 6: Volume control - This knob sets the level of the EX20âs built-in power amplifiers.
7: Output connector- This balanced male XLR connector carries line-level output signal from the EX20. It is used to send signal to a second EX20 being daisy-chained (see interconnection diagram on the following page) or to an optional EX500 subwoofer. 8: Limiter switch - Use this switch to turn the built-in limiter circuitry on or off. In order to maximize speaker protection, we recommend that this switch be left in the âonâ position during normal operation. 9: AC output - A standard AC power outlet. 10: AC input - Connect the supplied heavy-gauge 3-pin âIECâ power cable here.
Interconnecting the EX20
Using one EX20: A single mono signal (bus or aux send) is routed from a mixer to the EX20 XLR input.