Sony WM-FS399 Service Manual page 9

AM section
¢ Function switch: AM
AM RF SG
Put the lead-wire
antenna close to the
Via set
Cw
30% amplitude modulation by 400 Hz
signal
Repeat the procedure in each adjustment several times since L (4, 1)
affects CT (4, 1) and CT (4, 1) affects L (4, 1). Both the frequency
coverage and tracking adjustments should end with the final
adjustment of the trimmer capacitors.
162 LEVEL METER
PHONES
AM IF Adjustment
Reading on
LEVEL
METER
AM Frequency Coverage Adjustment
SG and set Adjustment
frequency part
Reading on
LEVEL
METER
Pointer
position
Adjustment
SG frequency part
520kHz
(520kHz) L4
[516.5kHz]
maximum
f minimum
1,680kHz
(1,750kHz)
(1631.5kHz]
f maximum
( ): US, Canadian models
[ ]: Italian model
AM Tracking Adjustment
Reading on
LEVEL
METER
SG and set
frequency
Adjustment part
620kHz
1,400kHz
Adjustment Part Location Diagram:
[MAIN BOARD] — Component side —
CT2: FM TRACKING
ADJUSTMENT L2:FM TRACKING
T1: AM IF ADJUSTMENT ADJUSTMENT
CT1: AM TRACKING
ADJUSTMENT
L1: AM TRACKING
ADJUSTMENT
L4: AM
FREQUENCY
COVERAGE
ADJUSTMENT
L3: FM FREQUENCY
CT4: AM FREQUENCY COVERAGE
CT3: FM FREQUENCY COVERAGE ADJUSTMENT
COVERAGE ADJUSTMENT
ADJUSTMENT
[MAIN BOARD] — Conductor side —
antenna terminal
IC1 °
TP18
(GND)
RV1: FM VCO ADJUSTMENT