Sony HCD-EP404 Service Manual page 13

0 dB=1 µV
TUNER SECTION
[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
100 k Ω
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.
level meter
32 Ω
+
–
HEADPHONE board
PHONES jack (JK501)
level meter
32 Ω
+
set
–
HEADPHONE board
PHONES jack (JK501)
digital voltmeter
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation 531 kHz
T101 1,602 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L110
TC102
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display
L103 87.5 MHz
Confirmation 108 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L102
TC101
Adjustment Location: MAIN board (See page 14)
HCD-EP404
1.5 ± 0.2 V
7.3 ± 0.3 V
603 kHz
1,404 kHz
Reading on Digital Voltmeter
2.1 ± 0.2 V
7.0 ± 0.4 V
89.9 MHz
105.9 MHz
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