Sony SERVICE MANUAL, Service Manual

Page: 9 / 26

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TUNER SECTION 0dB = 1
µ
V
• Switch location
FUNCTION switch
• • • • • • • • • • • • • • • • •
RADIO
PRESET MODE
• • • • • • • • • • • • • • • • • • • • •
MANUAL
GRAPHIC EQUALIZER
• • • • • • • •
center click
BALANCE
• • • • • • • • • • • • • • • • • • • • • • • • • • • • •
center click
VOLUME
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
MAX
MEGA BASS
• • • • • • • • • • • • • • • • • • • • • • • • •
mechanical center
MW Section
Procedure :
BAND switch : MW (LW)
FINE TUNING control : mechanical center
SW Section
Procedure :
BAND switch : SW
FINE TUNING control : mechanical center
FM Section
Procedure :
BAND switch : FM
FINE TUNING control : mechanical center
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 455kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 520kHz
CT4 1,680kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 600kHz
CT3 1,400kHz
SW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L6 5.8MHz
CT6 18.4MHz
SW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5 5.8MHz
CT5 18.4MHz
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L8 145kHz
CT8 300kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L7 160kHz
CT7 260kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2 10.7MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 64.0MHz
CT2 109.5MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 68.0MHz
CT1 102.0MHz
Adjustment Location : TUNER board (Page 10)
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
AM RF signal
generator
telescopic
antenna
terminal
12PF
30% amplitude modulation
by 400Hz signal.
Output level : as low as possible
FM RF signal
generator
telescopic
antenna
terminal
0.01
µ
F
22.5kHz frequency deviation
by 400Hz signal.
Output level : as low as possible
set
32
Ω
phones jack
level meter