Boss GT-1, Заметки по обслуживанию

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18
Sep. 2016 GT-1
4. JACK SW
This verifies the sensing operation of jacks.
1.
Connect the 1/4-inch stereo phone plug to the CTL2,3/EXP2 jack and the
miniature stereo phone plug to the PHONES jack.
2.
In the TEST MENU , select 4. JACK SW and press ENTER .
A screen like the one shown below is displayed.
[CTL] EJECT
[PHONES] EJECT
3.
Disconnect the plug from the
CTL2,3/EXP2
jack.
A screen like the one shown below is displayed.
[CTL] INSERT
[PHONES] EJECT
4.
Connect the plug to the CTL2,3/EXP2 jack again.
A screen like the one shown below is displayed.
[CTL] OK
[PHONES] EJECT
5.
Disconnect the plug from the
PHONES
jack.
A screen like the one shown below is displayed.
[CTL] OK
[PHONES] INSERT
6.
Connect the plug to the PHONES jack again.
A screen like the one shown below is displayed.
[CTL] OK
[PHONES] OK
7.
Detach the both plugs.
8.
Press
EXIT
to return to the
TEST MENU
.
5. SW/LED
This verifies the switch operation.
1.
In the
TEST MENU
, select
5. SW/LED
and press
ENTER
.
LEDs of , , CTL1 and from FX1/COMP to REVERB light up red.
A screen like the one shown below is displayed.
fig.test-5.eps
2.
Press .
The LED lights up blue.
3.
Press .
The LED goes off.
4.
In the same way, press respectively and CTL1 twice.
5.
Press the button displayed on the screen in sequence.
6.
After pressing buttons until MENU , press EXIT to return to the TEST
MENU .
6. LCD/ENCODER (DEV)
This item is not required at the service.
7. LCD/ENCODER
This verifies the display of the LCD screen.
1.
In the TEST MENU , select 7. LCD/ENCODER and press ENTER .
fig.test-7-1.eps
2.
Slowly turn the knob
1
clockwise.
The value displayed on the screen increases by one unit at a time and the
contrast grows darker.
* If the knob is turned in the opposite direction or the wrong knob is turned, a
black band appears at the bottom area of the screen. In this case, turn the knob
1
clockwise and continue to the test.
3.
When the value displayed on the screen reaches
24
, turn the knob
counterclockwise slowly.
The value displayed on the screen decreases by one unit at a time and the
contrast grows fainter.
When the value displayed on the screen reaches
1
, and the knob is turned
counterclockwise further, a screen like the one shown below is displayed.
fig.test-7-2.eps
4.
Slowly turn the knob
2
clockwise.
The value displayed on the screen increases by one unit at a time and the
display of the bar advances to the right.
5.
When the value displayed on the screen reaches 24 , turn the knob
counterclockwise slowly.
The value displayed on the screen decreases by one unit at a time and the
display of the bar advances to the right further.
When the value displayed on the screen reaches 1 , and the knob is turned
counterclockwise further, a screen like the one shown below is displayed.
fig.test-7-3.eps
6.
Test the knob 3 in the same way.
When the value displayed on the screen reaches
1
, and the knob is turned
counterclockwise further, a screen like the one shown below is displayed.
fig.test-7-4.eps
7.
Verify that the black frame around the screen have no missing dots, then
press
ENTER .
A screen like the one shown below is displayed.
fig.test-7-5.eps
8.
Press EXIT to return to the TEST MENU .