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)
Installation
IMPORTANT This appliance must be installed by qualified personnel. The manufacturer will not accept liability, should the above instructions or any of the other safety instructions incorporated in this book be ignored.
FO 1010
Gas Connection
On the end of the shaft (A) , which includes the GJ 1/2" threaded elbow, an adjustable joint is fixed so that the washer (B) is fitted between the components as shown in the diagram. A drop of paint at both edges of the "L" joint (C) will evidence that the good seal of the connection has been tested in the factory. Before connecting the gas supply pipe to the joint (C), the installer will ensure that the paint drop is unbroken and the "L" connector has not been moved by the vibrations during handling and transportation. When the final connection has been made, it is essential that a thorough leak test is carried out on the hob and installation. Ensure that the main connection pipe does not exert any strain on the hob.
A) End of shaft with nut B) Washer C) Adjustable joint
Cut Out Size
The dimensions of the cut-out are given in the diagram. Rectangular cut-out size for hob
0
50
58
0
0 47
550
5
5
min.
Building In
Building over a cupboard or drawer
If the hob is to be installed above a cupboard or drawer it will be necessary to fit a heat resistant board below the base of the hob on the underside of the work surface.
30
FO 2406
1
80
a b
Building over a kitchen unit with door
Proper arrangements must be taken in designing the furniture unit, in order to avoid any contact with the bottom of the hob which can be heated when it is operated. The recommended solution is shown in diagram 1. The panel fitted under the hob ("a") should be easily removable to allow easy access if technical assistance is needed. The space behind the kitchen unit ("b") can be used for connections.