Sony CFD-V5 Service Manual page 11

• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT4
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT3
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
CT2
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
CT1
Adjustment Location : Main board (See page 13)
455kHz
520kHz
1,780kHz
620kHz
1,400kHz
10.7MHz
86.5MHz
109.5MHz
86.5MHz
109.5MHz
– 11 –
VCO Adjustment
Procedure :
FM RF signal
generator
Carrier frequency : 98MHz
Modulation : No modulation
Output level : 1.38mV (–55dB)
1. Connect the frequency counter to 4 and 7 pin of IC 1 as
shown the figure below.
2. Turn the set to 98MHz.
3. Adjust RV1 for 76,000Hz reading frequency counter.
Standard Value : 75,950 – 76,050Hz
[ MAIN BOARD] (Conductor side)
[MAIN BOARD]
(Conductor side)
1
30
5
25
10
20
16 15
C3
Adjustment Location : Main board (See page 13)
telescopic
antenna
terminal
0.01µF
set
frequency counter
1 µ F
33k Ω
B
C
E