Read Sony PMC-D407L Service Manual online
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FM FREQUENCY COVERAGE
CHECK
Frequency Display
87.5 MHz
108 MHz
Reading on Digital voltmeter
1.3 V or more
9.0 V or less
Adjustment Part
<confirmation> <confirmation>
FM TRACKING CHECK
Adjust for a maximum reading on level meter.
<confirmation>
<confirmation>
87.5 MHz
108 MHz
MW FREQUENCY COVERAGE
CHECK
Frequency Display
531 kHz
1,611 kHz
Reading on Digital voltmeter
0.85 ± 0.5 V
6.8 ± 1.5 V
Adjustment Part
<confirmation> <confirmation>
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT4
621 kHz
1,404 kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
CFT1
450 kHz
LW FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display
153 kHz
279 kHz
Reading on Digital voltmeter
0.6 ± 0.4 V
7.5 ± 0.5 V
Adjustment Part
<confirmation>
L4
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
CT5
162 kHz
261 kHz
Adjustment Location: TUNER board (See page 15.)
TUNER SECTION 0 dB = 1 µV
Precautions in Repairing
Note : As a tuner unit (TU1) is difficult to repair if faulty,
replace it with new one.
• FM Section
Setting:
FUNCTION button: FM
FUNCTION button: FM
22.5 kHz frequency
deviation by 400 Hz signal
output level : as low as possible
deviation by 400 Hz signal
output level : as low as possible
• MW/LW Section
Setting:
FUNCTION button: MW or LW
FUNCTION button: MW or LW
30% amplitude
modulation by 400 Hz signal
output level : as low as possible
modulation by 400 Hz signal
output level : as low as possible
• Connecting Level Meter (FM, MW and LW)
• Connecting Digital Voltmeter (FM, MW and LW)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
EXT ANT FM
jack (CNP2)
jack (CNP2)
FM RF signal
generator
generator
0.01
µ
F
set
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
2
(headphones) jack
set
32
Ω
level meter
(range: 0.5-5 V ac)
(range: 0.5-5 V ac)
digital
voltmeter
voltmeter
tuner board
TP (VT)
TP (VT)
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