Service Check Program - Yamaha n8 Service Manual

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
Sleeve:
GND
Tip: output
Ring: input
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 kΩ
resistor is connected in series to the signal line compared to the
output level before connecting the resistor is as follows:
Input CH4 (n8)/
GAIN PAD
CH8 (n12)
-25 dBu
MAX ON
(Unbalance)
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:
GAIN Volumes of CH 1-8 (n8)/CH 1-12 (n12):
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
5.1 k ohms
5.1 k ohms
ST OUT R ST OUT R
(input without resistor) (input with resistor)
+4 dBu
-6 ± 2 dB
(reference)
MAX
MIN
Program" for information on muting. (Page 77)
OUTPUT
INPUT
TERMINAL
ST OUT L
CH 1 (n8/n12)
(LINE)
ST OUT R
CH 2 (n8/n12)
(LINE)
ST OUT L
CH 1 (n8/n12)
(RCA)
ST OUT R
CH 2 (n8/n12)
(RCA)
C-R OUT L (n8)
CH 3 (n8/n12)
C-R OUT A L (n12)
C-R OUT R (n8)
CH 4 (n8/n12)
C-R OUT A R (n12)
CH 5 (n12) C-R OUT B L
C-R OUT
CH 6 (n12)
B R
C-R OUT
CH 7 (n12)
C L
C-R OUT
CH 8 (n12)
C R
CH 7 (n12) AUX L
CH 8 (n12) AUX R
CH 5 (n8)
C-R
CH 9 (n12) *1
PHONES L
(LINE)
CH 6 (n8)
C-R
CH 10 (n12) *1
PHONES R
(LINE)
CH 7 (n8)
AUX
CH 11 (n12) *1
PHONES L
(LINE)
CH 8 (n8)
AUX
CH 12 (n12)
*1
PHONES R
(LINE)
· 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:
Volume without Center Click:
MIN (Turned counterclockwise fully)
Fader:
Push SW with Lock:
n8/n12
Unit: [dBu]
OUTPUT OUTPUT
LEVEL LEVEL
(Without muting) (With muting)
+4 -88 or less
+4 -88 or less
-7.8 -88 or less
-7.8 -88 or less
+4 -88 or less
+4 -88 or less
+4 -88 or less
+4 -88 or less
+4 -88 or less
+4 -88 or less
+4 -88 or less
+4 -88 or less
-6.9 -88 or less
-6.9 -88 or less
-6.9 -88 or less
-6.9 -88 or less
Center
MIN
OFF
119