20
Sep. 2016
GT-1
Input Test (AFAD)
8.
Input a signal like the following to the
INPUT
jack.
INPUT:
200-Hz sine wave at 0.218 Vpp (-20 dBm)
9.
Turn the knob
1
to set the value shown in the figure below to
0aE
.
fig.test-14-2.eps
10.
Verify that signals like the following are output from the
PHONES
jack.
PHONES L: 200-Hz sine wave at 200 to 300 mVpp
PHONES R: 200-Hz sine wave at 3.4 to 3.8 Vpp
11.
Connect the oscilloscope to the
OUTPUT L/MONO
and
R
jacks and verify
that signals like the following are output.
OUTPUT L: 200-Hz sine wave at 200 to 300 mVpp
OUTPUT R: 200-Hz sine wave at 3.4 to 3.8 Vpp
* If you verify the each level of L and R channels one by one, measure it with a
plug being connected to another jack.
12.
Detach the signal generator and the oscilloscope.
Residual Noise Test
13.
Connect the 1/4-inch mono phone plug with 47 kΩ load resistor to the
INPUT
jack and enter the Test Mode.
14.
In the
TEST MENU
, select
14. AUDIO INPUT
and press
ENTER
.
15.
Connect the noise meters to the
OUTPUT L/MONO
and
R
jacks.
16.
Turn the knob
1
to set the value shown in the figure below to
0AE
. Also
press
PREAMP
to set
muteL
to
o
and press
FX2/MOD
to set
muteR
to
o
.
fig.test-14-3.eps
17.
Verify that the residual noises are as the following values.
OUTPUT L: -93 dBm or lower (DIN-Audio)
OUTPUT R: -93 dBm or lower (DIN-Audio)
18.
Change the connection of the noise meter to the
PHONES
jack.
19.
Verify that the residual noises are as the following values.
PHONES L: -93 dBm or lower (DIN-Audio)
PHONES R: -93 dBm or lower (DIN-Audio)
20.
Detach the noise meter.
AUX Test
21.
Connect the oscilloscope to the
OUTPUT L/MONO
and
R
jacks.
22.
Connect the signal generator to the
AUX IN
jack (L, R) and input signals
like the following.
AUX IN L: 200-Hz sine wave at 2.0 Vp-p
AUX IN R: 200-Hz sine wave at 2.0 Vp-p
23.
Press
PREAMP
to set
muteL
to
x
and press
FX2/MOD
to set
muteR
to
x
.
24.
Verify that signals like the following are output from the
OUTPUT L/
MONO
and
R
jacks.
OUTPUT L: 200-Hz sine wave at 4.7 to 5.3 Vpp
OUTPUT R: 200-Hz sine wave at 4.7 to 5.3 Vpp
25.
Change the connection of the oscilloscope to the
PHONES
jack and verify
that signals like the following are output.
PHONES L: 200-Hz sine wave at 4.7 to 5.3 Vpp
PHONES R: 200-Hz sine wave at 4.7 to 5.3 Vpp
26.
Detach the oscilloscope.
27.
Press
EXIT
to return to the
TEST MENU
.
15. FACTORY RESET
This item is not required at the service.
Do not execute this item.
Follow
the procedure in
(p. 15) to execute a factory
reset.
16. AD NOISE
This item is not required at the service.
17. ENCODER DEVICE
This item is not required at the service.
* This item is added from ver. 1.06.
Summary of Contents for GT-1
Page 21: ...21 Sep 2016 GT 1 ...
Page 22: ...22 Sep 2016 GT 1 Circuit Board Main Exp Pedal Board fig b main 1 eps ...
Page 23: ...23 Sep 2016 GT 1 fig b main 2 eps ...
Page 24: ...24 Sep 2016 GT 1 Circuit Diagram Main Board 1 3 fig d main 1 eps L ...
Page 25: ...25 Sep 2016 GT 1 fig d main 1 eps R ...
Page 26: ...26 Sep 2016 GT 1 Circuit Diagram Main Board 2 3 fig d main 2 eps L ...
Page 27: ...27 Sep 2016 GT 1 fig d main 2 eps R ...
Page 28: ...28 Sep 2016 GT 1 Circuit Diagram Main Exp Pedal Board 3 3 fig d main 3 eps L ...
