Yamaha QL5 Service Manual page 159

FADER CALIBRATION
1) While holding down the B [SEL] key, turn on the power
switch, and the [Special Mode Screen] will appear, where
INITIALIZE, TRIM, CALIBRATION, etc. are executed.
2) Among MODE SELECT buttons, touch [FADER
CALIBRATION], and the fader calibration window will
appear.
3) According to instructions on the screen and using the
[SEL] key, select the fader for which CALIBRATION will
be executed. Select all the faders.
4) To u c h t h e [ STA RT ] b u t t o n i n t h e s c r e e n . A s a
confi rmation screen will appear, touch the [OK] button to
start CALIBRATION.
5) As "MOVE ALL SELECTED FADERS TO -∞ dB and
Press 'NEXT' Button" appears on the screen, apply all the
selected faders to the bottom and execute NEXT.
6) As "MOVE ALL SELECTED FADERS TO -20 dB and
Press 'NEXT' Button" appears on the screen, align all the
selected faders to the -20 index and execute NEXT.
7) As "MOVE ALL SELECTED FADERS TO 0 dB and
Press 'NEXT' Button" appears on the screen, align all the
selected faders to the 0 index and execute NEXT.
8) As "MOVE ALL SELECTED FADERS TO +10 dB and
Press 'NEXT' Button" appears on the screen, apply all the
selected faders to the top and execute NEXT.
9) As "Calibrating the Faders..." appears on the screen and
the motor driven calibration is started, do not touch the
faders until it is completed.
10) When the motor driven calibration is over, the automatic
correction will start. While every 8 faders are driven
together, correction is made so that the movement time
becomes the same as much as possible. Do not touch
faders during this procedure.
11) When all the procedure is over, the APPLY button appears
on the screen. Check to make sure that SEL-LED, CUE-
LED and ON-LED at the top of each fader are all turned
off and press the APPLY button.
Even one LED is lit in Step 11) above, take following
measures.
• When SEL-LED is lit
It is possible that positioning at any of 4 places in steps 5) to 8)
has failed.
As the [RESTART] button and [APPLY] button appear on the
screen, execute [RESTART] as necessary and do the procedure
again from Step 4.
• When CUE-LED is lit
In Step 9) above, full movement is not obtained at he specifi ed
maximum voltage.
As the [APPLY] button appears on the screen, press it once and
slide the subject fader by hand about 10 times and again do the
procedure from Step 3).
• When CUE-LED and ON-LED are lit
Oscillation and vibration have occurred during operation of
Step 9) above.
Replace the subject fader.
QL5/QL1
159