Read Sony ICF-CD873L Service Manual online
– 11 –
MAIN CLOCK SECTION
Main Clock Adjustment
Connection:
Adjustment jig:
Procedure:
1. Connect the frequency counter as the above figures.
2. Adjust CT401 for 4.2495 MHz reading on the frequency
1. Connect the frequency counter as the above figures.
2. Adjust CT401 for 4.2495 MHz reading on the frequency
counter.
Specified Value: 4.2490 to 4.2500 MHz
+
–
–
adjustment
jig
10 : 1 probe
TP (+5 V)
TP401 (X2)
TP GND (SHIELD)
+5
IN
GND
IN
GND
frequency counter
MAIN board
OUT
GND
GND
1 M
Ω
100 k
Ω
100 k
Ω
+5 V
0.5 pF
47 uF
IN
GND
1000 pF
1 M
Ω
OUT
GND
INVERTER
(TC7W04F)
(TC7W04F)
+
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