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12
FM/RDS SECTION
- FM mono:
1kHz, 75kHz devi., 60dB/µV
- FM stereo:
1kHz, 67.5kHz devi., 60dB/µV
Pilot signal 19kHz 7.5kHz devi.
OUTPUTS
- Connect the non-inductive type resistor of 8 ohms to the all speaker terminals unless otherwise noted.
Item
FM
IF/RF
Stereo
Distortion
Stereo
Separation
Muting
Level
Signal
output
Step
1
DC voltmeter
L941
0±100mV
3
Distortion
analyzer
Distortion
analyzer
Oscilloscope
Oscilloscope
L942
R956
R941
Minimum
Minimum
2
AC voltmeter
IFT on the
front end
IFT on the
front end
Maximum
Maximum
separation
Connection
of instrument
Fig.1
–
–
Fig.2
Fig.2
Fig.1
Channel L
or R 1kHz
99.0MHz
1kHz 75kHz devi.
65dBf (60dB)
99.0MHz Ext.
mod. 65dBf
(60dB)
FM SG
output
Stereo mod-
ulator output
Tuning
frequency
99.0MHz
99.0MHz
Channel L
or R 1kHz
99.0MHz Ext.
mod. 65dBf
(60dB)
99.0MHz Ext.
mod.65dBf(60dB)
RDS 2% MOD
99.0MHz 18dB
99.0MHz
99.0MHz
RDS
–
–
–
–
Fig.3
99.0MHz
Output
indicator
Adjustment
point
Adjust
for
Remarks
FM MUTE/MODE
switch: ON/AUTO
Repeat the steps
1 to 3 until no fur-
ther adjustment is
necessary.
FM MUTE/MODE
switch: ON/AUTO
Don’t turn more
than +/-180˚
Repeat stereo
distortion and
stereo separation
alignment until
THD at minimum
and separation at
maximum.
Decode the RDS-
Program Station.
AM SECTION
AM Modulation:
400Hz, 30%
For AH Version
Step
1
–
2
3
530kHz
600kHz
990kHz
600kHz
400Hz 30% mod.
60dB/m
AM SG
output
Tuning
frequency
Output
indicator
Adjustment
point
600kHz
400Hz 30% mod.
60dB/m
AC
voltmeter
AC
voltmeter
Digital
DC
voltmeter
L972
OSC coil
on RF
block L971
RF coil
on RF
block L971
Adjust
for
1.35±0.2V
Maximum
Maximum
Step
1
–
2
3
522kHz
or
531kHz
603kHz
999kHz
600kHz
400Hz 30% mod.
60dB/m
AM SG
output
Tuning
frequency
Output
indicator
Adjustment
point
600kHz
400Hz 30% mod.
60dB/m
AC
voltmeter
AC
voltmeter
Digital
DC
voltmeter
L972
OSC coil
on RF
block L971
RF coil
on RF
block L971
Adjust
for
1.3±0.2V (522kHz)
1.35±0.2V (531kHz)
Maximum
Maximum
For C Version
Содержание T761
Страница 1: ...NAD SERVICE MANUAL T 761 SURROUND SOUND RECEIVER T 761S U R R O U N D SOUND RECEIVER ...
Страница 14: ...14 PCB LAYOUT SPEAKER BOARD PRIMARY BOARD LED BOARD SECONDARY BOARD AC OUTLET BOARD ...
Страница 15: ...15 DIGITAL IN BOARD S VIDEO BOARD DIGITAL OUT BOARD ...
Страница 16: ...16 PSU BOARD COMPONENT VIDEO BOARD ...
Страница 17: ...17 LOAD BOARD VOLUME BOARD Top View Bottom View SURROUND AMP BOARD VIDEO 5 BOARD ...
Страница 18: ...18 AC3 BOARD COMPONENT SIDE ...
Страница 19: ...19 AC3 BOARD SOLDER SIDE ...
Страница 20: ...20 FRONT AMP BOARD ...
Страница 21: ...22 21 KEY BOARD COMPONENT SIDE KEY BOARD SOLDER SIDE ...
Страница 22: ...23 24 MAIN BOARD VIDEO BOARD MULTI CHANNEL BOARD AUDIO BOARD POWER SWITCH BOARD ...
Страница 70: ...SERVICE MANUAL NAD 2001 NAD ELECTRONICS INTERNATIONAL TORONTO ...