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MW VT VOLTAGE ADJUSTMENT (AEP, UK)
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
531 kHz
0.8 ± 0.1 V
CT4
1,611 kHz
5.5 ± 0.2 V
LW VT VOLTAGE ADJUSTMENT (AEP, UK)
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
CT5
279 kHz
5.5
V
Confirmation
153 kHz
0.5
V
MW TRACKING ADJUSTMENT (AEP, UK)
Adjust for a maximum reading on level meter
L3
621 kHz
CT2
1,404 kHz
LW TRACKING ADJUSTMENT (AEP, UK)
Adjust for a maximum reading on level meter
L5
162 kHz
CT3
261 kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
AM VT VOLTAGE CONFIRMATION (US, Canadian)
Frequency Display
Reading on Digital Voltmeter
Confirmation
530 kHz
0.7
V
Confirmation
1,710 kHz
5 ± 1 V
AM TRACKING ADJUSTMENT (US, Canadian)
Adjust for a maximum reading on level meter
L4
620 kHz
CT2
1,400 kHz
FM VT VOLTAGE ADJUSTMENT (US, Canadian)
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 (US, Canadian)
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment Location: TU board (See page 20)
TUNER SECTION
0 dB=1 µV
[AM (MW/LW)]
Setting:
Function
: RADIO
BAND switch: AM (MW/LW)
[FM] (US, Canadian)
* The adjustment is not necessary for FM because
that AEP, UK models use FM tuner unit (TU1).
Setting:
Function
: RADIO
BAND switch
: FM
MONO/ST switch : stereo
• Repeat the procedures in each adjustment several times, and the
VT voltage and tracking adjustments should be finally done by
the trimmer capacitors.
+ 0.8
– 0.3
SECTION 5
ELECTRICAL ADJUSTMENTS
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–)
+ 0.2
– 0.4
+ 0.4
– 0.3
+ 0.3
– 0.4
Содержание PMC-MD55 - Md Boombox
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