Yamaha M7CL-32, Руководство по обслуживанию

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M7CL-32/M7CL-48
121
Scene No. Rack No. EFFECT TYPE
5 5 Reverb
6 5 Symphonic
7 5 HQ Pitch
8 5 Dynamic Filter
9 6 Reverb
10 6 Symphonic
11 6 Dual Pitch
12 6 Dynamic Filter
13 7 Reverb
14 7 Symphonic
15 7 HQ Pitch
16 7 Dynamic Filter
17 8 Reverb
18 8 Symphonic
19 8 Dual Pitch
20 8 Dynamic Filter
6. Lamp Voltage Measurement
Measure the voltage between pins No. 3 and No. 4 at 2 places (1
place on the M7CL-32) on the rear panel.
Measure the voltage when the LAMP DIMMER is at MAX and
MIN positions.
7. Fan Operation Check
After turning on the power, check that no fan operation error is
shown on the display.
8. Power Supply Unit Output Voltage Inspection
After turning on the main power, check the voltage between
No. 1 pin (+24V) and No. 15 pin (GND) of the DC POWER
INPUT terminal on the rear panel.
Voltage value: +25.0
±
0.5 V
∗
If the measured value is out of the above voltage range, adjust
the value to be within the voltage range with the voltage
adjustment volume VR601 of the power supply unit (WE22290).
9.
Turn off the power of the unit, connect PW800W (option),
and check that it can be started normally.
10. Power Supply CAUTION Inspection
Connect the PW800W (option) to the unit, turn on the power of
the both and check the following:
(1) Power Supply CAUTION Inspection of the Unit
Check that “CAUTION” is shown on the display when the power
of only the unit is turned off.
(2) Power Supply CAUTION Inspection of the PW800W (option)
Check that “CAUTION” is shown on the display when the power
of only the PW800W (option) is turned off.
(1) Jitter
4. Fader Inspection
Parameters: Use the “SEISAN1.M7C” file for the “scene data
for fader inspection”.
∗
Download it from YSISS home page.
INSPECTIONS
Recall scenes 1 to 4 one by one to operate the fader for the
following check:
Judgment criteria 1:
Check that no fader vibrates when stopping at index –
∞
· +10 dB.
Judgment criteria 2:
The fader position should be as follows.
(1) When all faders are at the uppermost place:
All faders should be within 2 mm from the 10 dB index.
(2) When all faders are at the bottom position:
All faders should be within 2 mm from the –
∞
index.
5. Sound Check
Check the following items by listening.
(1) ANALOG INPUT, ANALOG OUTPUT
Parameters: CH1, CH17, CH32, CH41 (M7CL-48 only), ST
IN 1L
→
Use OMNI OUT 15, 16.
Set WORD CLOCK to INT 48 kHz.
(2) EFFECT function (DSP6 operation check)
Parameters: Use the “SEISAN1.M7C” file for “sound scene data”.
∗
Download it from YSISS home page.
Set WORD CLOCK to INT 48 kHz.
Input the music signal from ANALOG INPUT CH1
and adjust the GAIN knob so that the METER OVER
in the display does not light up for any scene.
Listen to OMNI OUT or PHONES OUT.
INSPECTIONS
Recall scene 5 (Reverb) and check the signal for at least 15
seconds.
Judgment criteria 1:
The EFFECT sounds must be output.
Judgment criteria 2:
The output should be free from noise.
In the same manner, recall and inspect by listening scenes 6
through 20.
The scene numbers and EFFECT types are as follows.
WORD CLOCK Permissible Range
44.1 kHz 5 nsec or below
48 kHz 5 nsec or below
MAX MIN
Permissible Range 12.0
±
1.0 V 0.65
±
0.5 V