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 9 (click to view)
SETTING UP THE GTi AMPLIFIER
REPLACING THE FUSE OR NEON TUBES The JBL A6000/A3000GTi amplifier is equipped with an internal fuse, a 20-inch neon tube and two 6-inch neon tubes. Should the fuse or a neon tube fail, perform the following steps to replace the part: NOTE: For neon tube replacement, see your authorized JBL car audio dealer to purchase new StreetGlow® neon tubes in 6- or 20-inch sizes. NOTE: Although the following steps discuss and illustrate how to disassemble a JBL A6000GTi, the disassembly procedure for a JBL A3000GTi is similar. 1. Disconnect and unmount the amplifier from the vehicle. On a soft surface, turn the amplifier over to view the bottom. Using a T-25 screwdriver, remove the four large Torx-head screws along the bottom edges and set them aside (see Figure 14). 2. Turn the amplifier over to view the top. Using a 5 �32-inch Allen wrench, remove the four cap screws on the clear cover and set them aside (see Figure 14). 3. Slide the clear cover off and set it aside (see Figure 14). 4. Using a T-15 screwdriver, remove the four Torx-head screws around the output panel and set them aside (see Figure 15). 5. Repeat Step 4 for the input panel (see Figure 15). 6. Remove the cover and set it aside (see Figure 15). Figure 15. Removing the input and output screws and the cover from the A6000GTi amplifier. Figure 14. Removing bottom screws and the clear cover from the A6000GTi amplifier. NOTE: Do not remove the logo badge assembly.
