Read Sony SRF-M97 Service Manual online
6
SRF-M97
SECTION 3
ELECTRICAL ADJUSTMENTS
(
): US, Panama models
[
]: Tourist model
AM VT VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on
Digital Voltmeter
L6
531 (530) [531] kHz
1.2
± 0.05 V
Confirmation
1,602 (1,710) [1,710] kHz
7.5 (7.9) [7.9]
± 0.5 V
(
): US, Panama models
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L4
585 kHz (590 kHz)
CT3
1,485 kHz (1,490 kHz)
(
): US, Panama models
[
]: Tourist model
FM VT VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on
Digital Voltmeter
Confirmation
87.5 (87.5) [76.0] MHz
2.8 (2.6) [1.0]
± 0.2 V
Confirmation
108.0 MHz
10.4 (9.5) [8.2]
± 1.0 V
[
]: Tourist model
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 [76.0] MHz
CT1
108.0 MHz
Adjustment Location: MAIN board (See page 7)
0 dB=1
µ
V
[AM]
Setting:
Band: AM
Band: AM
[FM]
Setting:
Band: FM
Band: 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 (J201)
FM RF signal
generator
22.5 kHz frequency
deviation and 30%
amplitude modulation
by 400 Hz signal
Output level:
as low as possible
deviation and 30%
amplitude modulation
by 400 Hz signal
Output level:
as low as possible
+
–
–
level meter
i
jack (J201)
set
16
Ω
0.01
µ
F
MAIN board
TP (RF GND)
TP (RF GND)
MAIN board
TP (ANT)
TP (ANT)
digital voltmeter
TP (VT)
TP (RF GND)
MAIN board
Ver. 1.2
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