Footswitch
The
To activate the TUNER, press and hold the button for about 1 second. The amplifier will be muted (all outputs except TUNER OUTPUT) and the front panel MUTE LED will flash. When a signal is detected, the nearest note is shown in the footswitch display and one of the four red LEDs will flash indicating sharp or flat. The inner two red LEDs indicate the note is closer to being in tune while the green LED in the middle indicates in tune. If a signal is not detected for a few seconds,
Block Diagram
Tube Replacement
Two 12AX7 dual triode vacuum tubes (valves) are at the core of your
When to replace the preamp tube: Sometimes, tubes become noisy or “microphonic” (the amp sounds like a glass chime tinkling during certain notes) as they wear out, but other times, tubes will fail without warning. If your amplifier stops working and other possible causes have been eliminated (breakers, cords, etc.), have an authorized service center inspect your amplifier for tube failure.
Rack Mounting
For Rack Mount Units Only: |
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The | |
or flight case that measures anywhere from |
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13" (33.0 cm) to 17.5" (44.5 cm) between |
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front and rear rails. |
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1) Remove the adhesive rubber feet from the bottom of the
2)Remove the 2 bolts {S} on each side of the TB‑1200/600, then use them to loosely attach the “rack ear” brackets {R} that were supplied with your TB‑1200/600.
3) Lift the
4) Bolt the
5)Slide the adjustable brackets {R} to fit the rack, then attach with bolts through the rear rails {Q} as shown.
6)Tighten all bolts securely.
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