Read Sony CMT-EP505 / HCD-EP505 Service Manual online
12
HCD-EP505
TUNER SECTION
0 dB=1
µ
V
[AM]
Setting:
Function
Function
: TUNER
Band switch : AM
[FM]
Setting:
Function
Function
: TUNER
Band switch : FM
• 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.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
32
Ω
MAIN board
SPEAKER terminal (CN503)
SPEAKER terminal (CN503)
FM RF signal
generator
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
+
–
–
level meter
set
32
Ω
0.01
µ
F
MAIN board
TP (FM ANT)
TP (FM ANT)
MAIN board
SPEAKER terminal (CN503)
SPEAKER terminal (CN503)
digital voltmeter
100 k
Ω
MAIN board
TP (FM VT)
TP (AM VT)
TP (AM VT)
Ver 1.1
no mark : EXCEPT AEP, UK, Chinese models
< > : AEP, UK, Chinese models
< > : AEP, UK, Chinese models
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T401 <T406>
450 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L408
530 kHz
1.3
± 0.1 V
<T402>
<531 kHz>
Confirmation
1,710 kHz
7.8
± 0.5 V
<1,602 kHz>
<7.1
± 0.5 V>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L407 <T401>
603 kHz
TC402 <TC401>
1,404 kHz
FM FREQUENCY COVERAGE CONFIRMATION
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
87.5 MHz
2.4
± 0.1 V <1.4 to 1.6 V>
Confirmation
108 MHz
6.8
± 0.5 V <7.3 to 8.5 V>
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
TC401
106.1 MHz
(EXCEPT AEP, UK, Chinese models)
Adjustment Location: MAIN board (See page 14)
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