Sanyo M7700L - FM Alignment; SW Alignment; LW Alignment

FM ALIGNMENT
Connections
TUNER
ADJUSTMENT
(continue)
Standard test frequency 400 Hz and deviation 22.5 kHz
Frequency
Alignment
Calibration
Place output of
gene-scope on
Trap Coil (L2).
of Signal
OUTPUT Generator
Connect input
terminal of gene-
scope to detector
output.
Calibration
of
Tuning Range
Adjustment
of
Tracking
Connect signal
generator to antenna
terminal through
dummy antenna.
Tuning Dial
Setting
Low End
Adjustments
Turn T4 (blue core}
fully counter-
clockwise.
T2 and T3
Obtain symmetrical
curve and maximum
amplitude.
T4 (blue core)
Obtain S curve and
maximum amplitude.
Connect VTVM with
3.2 ohm dummy load
and oscilloscope to
4
High End
Ext. speaker terminal. 90 MHz 90 MHz
106 MHz
106 MHz
Obtain sine-curve
and maximum amplitude.
Repeat the above adjustments.
’ Use a screwdriver with plastic grip for all adjustments.
SW ALIGNMENT
Alignment
Calibration
of
Tuning Range
Adjustment
of
Tracking
Connections
Frequency
Connect signal
generator to
antenna terminal
through dummy
antenna.
of Signal
OUTPUT Generator
5.7 MHz
Connect VTVM with
Tuning Dial
Setting
Low End
Adjustment
3.2 ohm dummy load; 18.7 MHz
High End
4
|
and oscilloscope to
Ext. speaker terminal. 6.5 MHz
6.5 MHz
17 MHz
17 MHz
Remarks
Obtain sine-wave of 400 Hz
and maximum amplitude.
Repeat the above adjustments.
* Use a screwdriver with plastic grip for all adjustments.
LW ALIGNMENT
Alignment
Calibration
of
Tuning Range
Adjustment
of
Connections
Frequency
Tracking
Connect standard
loop antenna to
output of signal
generator.
Place bar antenna
60 cm away from
loop antenna.
+
of Signal
OUTPUT Generator
147 kHz
Tuning Dial
Setting
Low End
Adjustment
T11
Connect VTVM with
3.2 ohm dummy load 365 Hz
High End
TC8
and oscilloscope to
Ext. speaker terminal. 170 Hz
170 Hz
L5-2 (bar ant. coil)
310 Hz
310 Hz
TCS
+
Remarks
Obtain sine-wave of 400 Hz
and maximum amplitude,
Repeat the above adjustments.