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For Rack Mount Units Only:
The TB-1200/600 can be mounted in a rack
or flight case that measures anywhere from
13" (33.0 cm) to 17.5" (44.5 cm) between
front and rear rails.
1) Remove the adhesive rubber feet from
the bottom of the TB-1200/600.
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 TB-1200/600 into position and
provide temporary support until all corners
are attached.
4) Bolt the TB-1200/600 front panel tabs to the
front rack rails (NOT SHOWN).
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.
Two 12AX7 dual triode vacuum tubes (valves)
are at the core of your TB-1200/600 amplifier.
Typically a 12AX7 tube will last several
years, but through heavy use and frequent
transportation jarring, it is possible to have a
tube last less than a year.
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.
TB-1200/600
Block Diagram
Tube Replacement
Rack Mounting
Footswitch
The TBFS-4 footswitch allows for remote control of 4 features
on the TB–1200/600 amplifiers: OVERDRIVE, VARI-Q™,
FX LOOP/BOOST, and TUNER. When the footswitch is
connected properly, "On" will be visible in the display. To
activate OVERDRIVE, VARI-Q™, or FX LOOP/BOOST, press and
release the corresponding button (the LED will turn red
indicating the function is active). A volume boost can be
achieved by adjusting the TRIM control clockwise (located
on the rear of the amplifier, see page 7, item II) and activating
the FX LOOP/BOOST button. Note: The front panel buttons
on the amplifier may still be used when the footswitch is
connected.
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, "---" will be shown in the display. Press and release
TUNER button again to exit the tuning function and resume
playing. All other footswitch and front panel function buttons
have no effect while the tuner is active.