Sony HCD-EP303 Service Manual page 14

HCD-EP303
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
FM ANT
0.01 µ F
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
MAIN board
TP10 (FM VT)
TP11 (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.
14
level meter
32 Ω
+
–
HEADPHONE board
PHONES jack (JK401)
level meter
32 Ω
+
set
–
HEADPHONE board
PHONES jack (JK401)
digital voltmeter
100 k Ω
no mark : Except AEP, UK models
< > : AEP, UK models
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
530 kHz
Confirmation
<531 kHz>
1,710 kHz
T102
<1,602 kHz>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L110
TC102
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display
L104 87.6 MHz
Confirmation 108 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L103
TC101
Adjustment Location: MAIN board (See page 15)
1.5 ± 0.2 V
7.7 ± 0.3 V
<7.3 ± 0.3 V>
600 kHz <603 kHz>
1,400 kHz <1,404 kHz>
Reading on Digital Voltmeter
2.1 ± 0.2 V
7.0 ± 0.4 V
89.9 MHz
105.9 MHz