HCD-EC68/EC78
21
[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”.
Adjustment Location and Connecting Points:
IC801
CN801
ANTENNA
36
1
3
1
19
18
IC801 pin XL
(TUNER VT)
IC801 pin RT
(TUNER OUT L-ch)
– MAIN Board (Conductor Side) –
L802
FM Detector
Adjustment
– MAIN Board (Component Side) –
L803
FM Frequency
Coverage Adjustment
L801
FM Frequency
Coverage Adjustment
L805
AM Tracking
Adjustment
JW801
(TUNER-GND)
L804
AM Tracking
Adjustment
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Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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