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 14 (click to view)
English
REPLACING THE DUST BAG, S-BAG�
1 Replace the s-bag� as soon as the indicator window becomes fully red � raise the nozzle from the base to see this (1a); or when the window lights up (1b). 2 Remove the hose and open the lid. 1a 3 Pull the cardboard holder to remove the s-bag�. This automatically closes the dust bag and stops dust from leaking out. 4 Insert a new s-bag� by pushing the cardboard holder straight down in its tracks. Close the lid. 1b 2 3 4
Note: Replace the s-bag� even if it is not full (it may be blocked). Also replace after using carpet-cleaning powder. Use only Electrolux original dust bags � s-bag� Classic, s-bag� Clinic or s-bag� Anti-odour.
Replacing the motor filter (Ref. No. EF54) (Replace the filter for every 5th replacement of the s-bag�) 5 Remove the old filter 6 Insert a new filter in the groove (6a). To make replacement easier, open the container by pressing on it as shown in (6b). 7 Replace the filter and close the lid. Cleaning the washable HEPA filter (Ref. No. EFH13W) (When the indicator lamp comes on or for every 5th replacement of the dust bag) 8 Open and remove the lid, then remove the filter. 9 Rinse the inside (dirty side) of the filter in warm tap water. Tap the filter frame to remove excess water. Repeat four times and allow the filter to dry.
6b
Note: Do not use cleaning agents and avoid touching the delicate filter surface.
10 Replace the filter and lid as shown.