– 20 –
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
AM VT VOLTAGE CONFIRMATION
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
530 kHz
0.7
V
Confirmation
1,710 kHz
5 ± 1 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L4
620 kHz
CT2
1,400 kHz
FM VT VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L2
108 MHz
4.2 ± 0.2 V
Confirmation
87.5 MHz
1.9
V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
TUNER SECTION
0 dB=1 µV
[AM]
Setting:
Function
: RADIO
BAND switch: AM
[FM]
Setting:
Function
: RADIO
BAND switch
: FM
MONO/ST switch : stereo
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
Adjustment Location:
– TU BOARD (Component Side) –
+ 0.8
– 0.3
SECTION 5
ELECTRICAL ADJUSTMENTS
FM tracking
Adjustment
L4
CT2
L2
FM VT Voltage Adjustment
AM Tracking
Adjustment
T1
AM IF Adjustment
CT1
L1
TB1
IC1
TP (CV)
TP (FM–)
TP (FM+)
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
2
(headphone) jack
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level: as low as possible
+
–
level meter
2
(headphone) jack
TU board
TP (FM–)
set
32
Ω
0.01
µ
F
TU board
TP (FM+)
digital voltmeter
100 k
Ω
TU board
TP (CV)
TP (FM–)
– TU BOARD (Conductor Side) –
+ 0.2
– 0.4
Содержание PMC-MD55 - Md Boombox
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