Yamaha n8, Service Manual

Page: 119 / 245

119
n8/n12
2-2-11. Insert I/O
Set up as in descriptions marked
w
and
r
in procedure 2-2-1 .
Insert a plug, which has wiring connection as in the following
fi gure, to the INSERT I/O connector of the input channel to be
measured.
Check that ST OUT level is as shown below at this time.
Tolerance
-9 ± 2 dB
2-2-12. Hi-Z
Set up volumes and faders as described in procedure
2-2-1
and
then set up as follows:
Input signal from CH 4 (n8)/CH 8 (n12) with unbalanced
system.
Turn on the Hi-Z switch of CH 4 (n8)/CH 8 (n12).
Check that the difference in output level when a 500 k
Ω
resistor is connected in series to the signal line compared to the
output level before connecting the resistor is as follows:
Input CH4 (n8)/
CH8 (n12)
GAIN PAD
ST OUT R
(input without resistor)
ST OUT R
(input with resistor)
-25 dBu
(Unbalance)
MAX ON
+4 dBu
(reference)
-6 ± 2 dB
2-2-13. INPUT B (CH 1-4 (n8)/CH 1-8 (n12))
Set up as in descriptions marked
w
and
r
in procedure 2-2-1 .
Insert an empty plug, which has no wiring connection, to the
INPUT B of the input channels to be measured.
Check that there is no output from the ST OUT when the plug
is inserted.
2-2-14. MUTE
Set up the controller as follows:
AUX/C-R PHONES Volumes: MAX
GAIN Volumes of CH 1-8 (n8)/CH 1-12 (n12): MIN
Set AD/DA through connection (Normal Mode).
Refer to
“2-12. AD/DA through connection in Service
Check Program” for details of setup procedure and internal
connection. (Page 78)
Input signal and adjust input level so that output levels are as in
the following table:
Turn on a MUTE switch.
Check if the corresponding output terminal is muted as in the
following table.
Refer to
“2-12. AD/DA through connection in Service
Check Program” for relationship between input and output
connectors. (Page 78)
Refer to
“2-7. MUTE ON/OFF test in Service Check
Program” for information on muting. (Page 77)
Unit: [dBu]
INPUT
OUTPUT
TERMINAL
OUTPUT
LEVEL
(Without muting)
OUTPUT
LEVEL
(With muting)
CH 1 (n8/n12)
ST OUT L
(LINE)
+4 -88 or less
CH 2 (n8/n12)
ST OUT R
(LINE)
+4 -88 or less
CH 1 (n8/n12)
ST OUT L
(RCA)
-7.8 -88 or less
CH 2 (n8/n12)
ST OUT R
(RCA)
-7.8 -88 or less
CH 3 (n8/n12)
C-R OUT L (n8)
C-R OUT A L (n12)
+4 -88 or less
CH 4 (n8/n12)
C-R OUT R (n8)
C-R OUT A R (n12)
+4 -88 or less
CH 5 (n12) C-R OUT B L +4 -88 or less
CH 6 (n12)
C-R OUT
B R
+4 -88 or less
CH 7 (n12)
C-R OUT
C L
+4 -88 or less
CH 8 (n12)
C-R OUT
C R
+4 -88 or less
CH 7 (n12) AUX L +4 -88 or less
CH 8 (n12) AUX R +4 -88 or less
CH 5 (n8)
CH 9 (n12)
*1
(LINE)
C-R
PHONES L
-6.9 -88 or less
CH 6 (n8)
CH 10 (n12) *1
(LINE)
C-R
PHONES R
-6.9 -88 or less
CH 7 (n8)
CH 11 (n12) *1
(LINE)
AUX
PHONES L
-6.9 -88 or less
CH 8 (n8)
CH 12 (n12) *1
(LINE)
AUX
PHONES R
-6.9 -88 or less
· Use 22 Hz HPF and 30 kHz LPF.
*1: Connect plugs at the same time for ST CH LINE L/R pair
connectors.
(i.e. n8: 5(L) and 6(R), 7(L) and 8(R) / n12: 9(L) and
10(R), 11(L) and 12(R))
3. Sounding/Function test
Activate the controllers.
Check that there is no abnormal sound (rubbing noise, etc.)
or discontinuity of sound when all the volumes/faders are
operated.
4. Factory setting
Default setting of controllers
Volume with Center Click: Center
Volume without Center Click:
MIN (Turned counterclockwise fully)
Fader: MIN
Push SW with Lock:
OFF
5.1 k ohms
Sleeve:
GND
Tip: output
Ring: input 5.1 k ohms