Sony ICF-CD820 / ICF-CD820L / ICF-CD821 Service Manual ▷ View online
– 13 –
Adjustment Location:
[MAIN Board] (Conductor Side)
IC502
IC501
TP (RF)
TP
(VREF)
TP
(FE)
IC401
TP (TEST)
TP
(GND)
[MAIN Board] (Component Side)
RV502
Focus Gain Adjustment
Focus Gain Adjustment
RV501
Focus Bias Adjustment
Focus Bias Adjustment
– 14 –
SECTION 5
DIAGRAMS
• Circuit Boards Location
POWER board
MAIN board
JACK board
(Except CD820: US, Canadian)
(Except CD820: US, Canadian)
MOTOR board
SWITCH board
KEY board
– 24 –
• Waveforms
1
IC401
%ª
(X2)
500 mV/DIV, 100 ns/DIV
2
IC401
%•
(X1)
2 V/DIV, 100 ns/DIV
3
IC401
%§
(XT2)
2 V/DIV, 20 µs/DIV
4
IC401
%∞
(XT1)
1 V/DIV, 20 µs/DIV
5
IC501
#¡
(RFO) (PLAY MODE)
200 mV/DIV, 500 ns/DIV
6
IC501
$¢
(TET) (PLAY MODE)
500 mV/DIV, 1 ms/DIV
7
IC502
@£
(FOK) (PLAY MODE)
50 mV/DIV, 2 ms/DIV
8
IC502
1
(SCOR) (PLAY MODE)
5 V/DIV, 5 ms/DIV
9
IC502
&¢
(XTAO) (PLAY MODE)
2 V/DIV, 50 ns/DIV
0
IC502
&£
(XTAI) (PLAY MODE)
500 mV/DIV, 50 ns/DIV
1.7 Vp-p
4.19 MHz
6.3 Vp-p
4.19 MHz
4.8 Vp-p
32 kHz
2.4 Vp-p
32 kHz
1.3
±
0.5 Vp-p
Approx.
138 mVp-p
138 mVp-p
Approx.
120 mVp-p
120 mVp-p
4 Vp-p
5.9 ms
6.7 Vp-p
16.93 MHz
1.4 Vp-p
16.93 MHz
– 25 –
!¡
IC502
^¢
(WFCK) (PLAY MODE)
2 V/DIV, 100 µs/DIV
5 Vp-p
136
µ
s
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