– 9 –
SECTION 3
ELECTRICAL ADJUSTMENTS
0 dB = 1µV
[FM]
Setting:
Band switch: FM
[AM (LW)
*
]
* AM : French model
LW : AEP, UK models
Setting:
Band switch: AM (LW)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
• Remove FM antenna in FM adjustments.
Adjustment Location: Main Board (See page 10)
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading On Digital voltmeter
L 4
87.5 MHz
2.5 V ± 0.1 V
confirmation
108.0 MHz
Less than 10.7 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
87.5 MHz
CT2
108 MHz
AM (LW) VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading On Digital voltmeter
L 5
531 kHz (153 kHz)
2.7 V ± 0.1 V (3.3 V ± 0.1V)
confirmation
1,602 kHz (279 kHz)
Less than 9.5 V (7.5 V)
AM (LW) TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
621 kHz (162 kHz)
CT1
1,404 kHz (243 kHz)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz
( ): AEP, UK models
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
–
level meter
@
(earphone) jack (EJ1)
set
FM antenna in
32
Ω
0.01
µ
F
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level meter
set
32
Ω
@
(earphone) jack (EJ1)
+
–
digital voltmeter
MAIN board
TP (VT)
