HCD-EC68P/EC78P
23
AM FREQUENCY COVERAGE ADJUSTMENT
(Except EC78P: UK model)
Adjustment Part Frequency Display
Reading on Digital
Voltmeter
L801 530 kHz 1.5 ± 0.1 V
Confi rmation 1,710 kHz 8 ± 0.5 V
AM FREQUENCY COVERAGE ADJUSTMENT
(EC78P: UK model)
Adjustment Part Frequency Display
Reading on Digital
Voltmeter
L801 531 kHz 1.5 ± 0.1 V
Confi rmation 1,602 kHz 7.2 ± 0.5 V
AM TRACKING ADJUSTMENT
(Except EC78P: UK model)
Adjust for a maximum reading on level meter
L805 530 kHz
AM TRACKING ADJUSTMENT
(EC78P: UK model)
Adjust for a maximum reading on level meter
L805 531 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display
Reading on Digital
Voltmeter
L803 87.5 kHz 1.75 ± 0.1 V
Confi rmation 108 kHz 6.2 ± 0.5 V
FM TRACKING ADJUSTMENT
Adjust for a minimum reading on level meter
L804 98 MHz
Adjustment Location: MAIN board (See page 24)
FM DETECTOR ADJUSTMENT
Setting:
FUNCTION: FM
FM RF signal
generator
Carrier frequency: 98MHz
Modulation:
deviation by FM 75 kHz
Output level: 60 dBuV
+
–
level meter
MAIN board
JW801 (TUNER-GND)
MAIN board
IC801 pin RT
(TUNER OUT L-ch)
set
MAIN board
ANTENNA
CN801 pin
MAIN board
ANTENNA
CN801 pin
1. Turn the set to 98 MHz.
2. Adjust L802 so that modulation distortion may become the
best in the vicinity of the maximum value where the tuner out
level becomes –15dBuV or more.
FM AUTO STOP CHECK
generator
SET
+
75 Ω
Procedure :
1. Turn the power on.
2. Input the following signal from Signal Generator to FM an-
tenna input directly.
* Carrier Freq : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note: Please use 75 ohm “coaxial cable” to connect SG and the set. You
cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal with
automatic scanning.
4. Confi rm that input Frequency of A, B and C detected and auto-
matic scanning stops.
The stop of automatic scanning means “The station signal is re-
ceived in good condition”.
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