Read Sony SRF-M807 Service Manual online
5
SRF-M807
SECTION 3
ELECTRICAL ADJUSTMENTS
TUNER SECTION
0 dB=1 mV
[AM]
Setting:
BAND button: AM
BAND button: AM
[FM]
Setting:
BAND button: FM
BAND button: FM
• Repeat the procedures in each adjustment several times, and
the tracking adjustments should be finally done by the trimmer
capacitors.
capacitors.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
16
Ω
i
jack (J1)
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level:
as low as possible
deviation by 1 kHz
signal
Output level:
as low as possible
+
–
–
level meter
0.01
µ
F
MAIN board
TP (FE GND)
TP (FE GND)
MAIN board
TP (FM ANT IN)
TP (FM ANT IN)
set
16
Ω
i
jack (J1)
digital voltmeter
TP (VT)
TP (FE GND)
MAIN board
(
): Panama model
AM VT VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L5
530 kHz
1.7
± 0.05 V
Confirmation
1,602 kHz
7.9
± 1.0 V (8.8 ± 1.0 V)
(1,710 kHz)
(
): Panama model
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L4
585 kHz (590 kHz)
CT2
1,485 kHz (1,490 kHz)
FM VT VOLTAGE CONFIRMATION
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
108 MHz
9.9
± 1.0 V
Confirmation
87.5 MHz
3.3
± 0.3 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment and Connecting Location: MAIN board
(See page 7)
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