Diagrams - Sony STR-AV880 Service Manual

istment
NTENNA REC OUT
M ANT (75 Q)
8 MHz
mV (60 dB)
3.75 kHz deviation (45%)
3.75 kHz deviation (45%) 7
5 kHz deviation (10%)
ereo
MIN BOARD]
ent
L,
SIGNAL LEVEL
VTVM
—" a
set
|
ANTENNA REC OUT
FM ANT (75 Q)
Carrier frequency:
Output level:
Modulation:
Mode:
Procedure:
Tune the set to 98 MHz.
STR-AV8&80 STR-AV88O0
FM stereo
. VTVM VTVM
erat oped connection reading (dB)
L-CH L-CH @®
R-CH L-CH Adjust RT151 for
minimum reading.
R-CH R-CH ©
L-CH R-CH Adjust RT151 for
minimum reading.
L-CH Stereo separation:
R-CH Stereo separation:
@-@
©-O
The separations of both channels should be equal.
RV102
98 MHz
Audio 1 kHz:
Sub channel 38 kHz:
Pilot signal 19 kHz:
stereo
Procedure:
1. Tune the set to 98 MHz.
70.
1 mV (60 dB)
33.75 kHz deviation (45%)
33.75 kHz deviation (45%)
7.5 kHz deviation (10%)
2. Adjust RT102 so that the signal level indicator is
RT101
FM AGC Adjustment
Setting:
FM rf stereo
signal
generator
ANTENNA REC OUT
FM ANT (75 Q)
Carrier frequency: 98 MHz
Output level: 100 mV (80 dB)
Modulation:
Audio 1 kHz: 33.75 kHz deviation (45%)
Sub channel 38 kHz: 33.75 kHz deviation (45%)
Pilot signal 19 kHz: 7.5 kHz deviation (10%)
Mode: stereo
Procedure:
1, Turn the set to 98 MHz.
2. Adjust RT141 so that the AGC voltage goes down.
FM Auto Stop Level Adjustment
Setting:
FM rf stereo
signal
generator
ANTENNA
FM (759)
98 MHz
70 pV (20 dB)
33.75 kHz deviation (45%)
33.75 kHz deviation (45%)
7.5 kHz deviation (10%)
stereo
Carrier frequency:
Output level:
Modulation
Audio 1 kHz:
Sub channel 38 kHz:
Pilot signal 19 kHz:
Mode:
Procedure:
1. Tune the set to 98 MHz.
2. Adjust RT101 so that the STEREO indicater goes
on.
STR-AV88O
SECTION 2
DIAGRAMS
CIRCUIT BOARDS LOCATION
TM b
outlet board nei oer
video board
1C-L board
rectifier board
AC SW board
display board
system SW board b
speaker SW board
antenna board
headphone board
front jack board
tone {A} board
1C-R board
key board board main board