17
Oct. 2010
CUBE-40XL
3. Volume Control Test
When entering Volume Test, all LEDs go off temporarily.
1.
Operate the following knobs of (1)–(10) minimum–center–maximum in
numerical order and confirm the all knobs work correctly with its LED
lighting and sound from the speaker.
* If you mistake the order, the knob will not response.
* After detecting all of the minimum, center and the maximum value, test
program advances to test of the next knob.
(1) JC CLEAN VOLUME
(2) EQUALIZER BASS
(3) EQUALIZER MIDDLE
(4) EQUALIZER TREBLE
(5) EFX
(6) DELAY/LOOPER
(7) REVERB
(8) SOLO VOLUME
(9) LEAD VOLUME
(10) LEAD GAIN
The volume level of the speaker sound increases as the control is
operated toward the maximum position, and the pitch rises at the
intermediate position.
When all volume testing has been completed, the LEFT (JC CLEAN),
CENTER, and RIGHT (LEAD) LEDs flash.
This concludes the testing.
Signal-level Test (for Reference)
When components on the circuit board have been replaced, perform this test.
Items Required
• Level meter
• Signal generator
• Dummy load resistor tool
- 8
Ω
(100 W or more)
- 1/4-inch stereo phone plug with 100-
Ω
(1/2 W or more) load resistor
connected between L, R, and GND
Procedure
1.
1
through
4
.
The version information is displayed.
2.
Depress the [SOLO] (red) foot switch connected to the
FOOT SW
jack.
All LEDs light up, and the unit enters the Level Test mode.
AUX IN to PHONES Output Verification
3.
Adjust the
LEAD
control to
ACOUSTIC SIM
.
4.
To the
RECORDING OUT/PHONES
jack, connect the 1/4-inch stereo
phone plug 100-
Ω
load resistors (x 2).
5.
Simultaneously input the following signals to
AUX IN
left and right.
L: 100-Hz, 1-kHz, and 10-kHz sine waves at -20 dBu
R: 100-Hz, 1-kHz, and 10-kHz sine waves at -20 dBu
6.
Verify that the output values of the
RECORDING OUT/PHONES
jack are
as follows.
L: 100 Hz at +1.0±1.5 dBu (flat)
R: 100 Hz at +1.0±1.5 dBu (flat)
L: 1 kHz at -7.0±1.5 dBu (flat)
R: 1 kHz at -7.0±1.5 dBu (flat)
L: 10 kHz at +6.0±1.5 dBu (flat)
R: 10 kHz at +6.0±1.5 dBu (flat)
Speaker Output Verification (1)
3.
Adjust the
LEAD
control to
BLACK PANEL
.
4.
Connect the 8-
Ω
load resistor to the speaker cables (red and black).
* When detaching the speaker cables, be careful to keep the cable connectors from
being grounded. Failure to do so may damage the Main Board.
5.
Input the following signals to the
INPUT
jack.
100-Hz, 1-kHz, and 10-kHz sine waves at -25.0 dBu
6.
Verify that the output values of the speaker are as follows.
100 Hz at +14.0±1.5 dBu (flat)
1 kHz at +14.0±1.5 dBu (flat)
10 kHz at +13.0±1.5 dBu (flat)
Speaker Output Verification (2)
3.
Adjust the
LEAD
control to
TWEED
.
4.
Confirm the 8-
Ω
load resistor is connected to the speaker cables (red and
black).
5.
Input the following signals to the
INPUT
jack.
100-Hz, 1-kHz, and 10-kHz sine waves at -25.0 dBu
6.
Verify that the output values of the speaker are as follows.
100 Hz at +14.0±1.5 dBu (flat)
1 kHz at +14.0±1.5 dBu (flat)
10 kHz at +22.0±1.5 dBu (flat)
Speaker Output Verification (3)
3.
Adjust the
LEAD
control to
CLASSIC
.
4.
Confirm the 8-
Ω
load resistor is connected to the speaker cables (red and
black).
5.
Input the following signals to the
INPUT
jack.
1-kHz sine wave at -25.0 dBu
6.
Verify that the output values of the speaker are as follows.
1 kHz at +14.0±1.5 dBu (flat)
Speaker Output Verification (4) (TUBE LOGIC)
3.
Adjust the
LEAD
control to
EXTREME
.
4.
Confirm the 8-
Ω
load resistor is connected to the speaker cables (red and
black).
5.
Input the following signals to the
INPUT
jack.
100-Hz, 1-kHz, and 10-kHz sine waves at -35.0 dBu
6.
Verify that the output values of the speaker are as follows.
100 Hz at +3.5±1.5 dBu (flat)
1 kHz at +3.5±1.5 dBu (flat)
10 kHz at +1.0±1.5 dBu (flat)
Position of control
Lighting LED
Minimum (all the way
counterclockwise)
LEFT (JC CLEAN)
Center
LEFT (JC CLEAN), CENTER
Maximum (all the way
clockwise)
LEFT (JC CLEAN), CENTER, RIGHT (LEAD)
Summary of Contents for CUBE-40XL
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Page 18: ...18 Oct 2010 CUBE 40XL Circuit Board Main Board fig b MAIN 1 eps...
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Page 20: ...20 Oct 2010 CUBE 40XL Circuit Diagram Main Board 1 3 fig d MAIN 1 e eps L arrangement...
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Page 22: ...22 Oct 2010 CUBE 40XL Circuit Diagram Main Board 2 3 fig d MAIN 2 e eps L termi...
Page 23: ...23 Oct 2010 CUBE 40XL fig d MAIN 2 e eps R nal to Jack Board...
Page 24: ...24 Oct 2010 CUBE 40XL Circuit Diagram Main Board 3 3 fig d MAIN 3 e eps no signal non clip...
Page 25: ...25 Oct 2010 CUBE 40XL Circuit Board Panel Jack Input PS Board fig b PANEL eps...
Page 26: ...26 Oct 2010 CUBE 40XL Circuit Diagram Panel Board fig d PANEL eps L...
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