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GT-X Setup Manual page 113

cables prior to entering this mode. Failing to do so can
sometimes mean the unit behaves in an unusual manner.
OK. So when you start up the factory-commissioning mode
you will first get a single page display. The first line will
display 'GT-3' and the second line informs you of the
software you are running and will look something like
'ver. 1.01'. The current version is v1.03, and is upgradeable
via EPROM replacement at a Roland Service Centre. Then
you are into the 19 steps to a commissioned unit...each step
starts automatically once the last step is complete, unless the
unit cannot determine when the test is complete, in which
case you need to press [EXIT] to continue.
If you happen to have your unit plugged into an amp
and speaker you should hear a rather quiet continuous
tone at about 500Hz or so. DON'T turn your speaker
system up. In fact make sure it is at a VERY LOW
output...it could ruin your day later in the testing cycle.
The fact is, you really don't need (or probably want)
your GT-3 hooked up to an amp here- these test were
designed for the factory test bench.
1. Display Check
This step merely lights up every single part of the GT-3
LCD display and all of the red LEDs on the effects buttons
and the five footswitches (1-4 and CTL). To move onto the
next step press [EXIT].
2. LCD Contrast Check
This step enables you to check the full range of the LCD
contrast. The display will show the contrast level at 15.
What it wants you to do is to use the value dial and change
the contrast to 0 and then back to 15. Doing this is the only
way to proceed to step 3.
3. Switch Check
This step systematically forces you to press every button in
a specific order. If you press the wrong button it let's you
know with a message on the LCD! As you press each button
it's associated LED (if any) is extinguished. This test
therefore checks that all your buttons/footswitches and their
associated LEDs are functioning correctly. It is not possible
to exit this mode without following the test through.
4. Expression Pedal Sweep Check
This simple test, like the last one, must be completed; there
is no way to bypass it. It is simply checking that the Top,
Bottom and Middle trigger points used for triggering the
internal pedal can be detected. To execute the test start with
the EXP pedal fully forward then simply bring the EXP
pedal all the way back, this should light up the middle point.
Then push it all the way forward, thus lighting the top, and
finally bring it all the way back again to light the bottom.
© Copyright 2000-2002 Barry S. Pearce et al.
Section 27 Factory Rest/Commissioning
The test then goes on to try the same thing with a SUB EXP
PEDAL. Once again, simply execute the test as above. If
you don't have an external SUB EXP pedal then connect
your guitar to the GT-3 using a normal guitar lead, and put
the guitar volume control at max. First plug the lead into the
SUB CTL/SUB EXP socket. Push it all the way in. Then
pull it out – as you do so the middle and top will light up
and then push it all the way in once more to light the
bottom. You can then remove the guitar lead.
5. Battery Check
The display shows the battery voltage. Press [EXIT] to
move onto the next test.
Normal voltage is 3.1v-3.2v. According to the GT-5 Service
Manual issued by Roland, the battery low display comes on
if the battery voltage reaches 2.71v or less. If your battery
voltage is 2.8v-2.9v it's probably time to prepare yourself
for a battery change. Certainly if you have a gig
approaching change it, but failing that, perform the change
at 2.7v when the Battery Low warning appears.
6. MIDI Connection Check
This appears to be a MIDI loopback style test. This is done
using a single MIDI cable in a simple connection from the
MIDI Out -> MIDI In.
If you have no MIDI cable connected, the display will read
'No Connect' and you may simply press [EXIT] to move on
to the next test. If you have a MIDI cable, simply connect in
to out. The test should produce 'Verify OK' if the MIDI
ports are OK.
7.Output D/A Converter Test
Be careful with this next test. Have your volume control
set FAIRLY LOW to avoid damaging anything!
suggest not having an amp connected at all for the next
few signal tests!
This test is designed to be done on an oscilloscope. A
rectangular waveform is applied to the input, and the GT-5
OUTPUT control is adjusted from 0-100% to verify level
changes. If you don't have an O-scope, you can connect the
GT-3 to your amplifier (with the volume starting at ZERO).
Slowly turn up the volume, you will hear something like a
500Hz tone being muted and un-muted...in time with the
Mute Off/On display in fact! If you haven't turned the
output level knob up do so now. Do it slowly and carefully.
On the other hand, if you've just parted with your speakers
and/or your eardrums, then turn it down. I told you so
(before we started!). When you are bored press [EXIT] to
move on.
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