Sony HCD-EP505 Service Manual page 12

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