Read Sony ICF-CD873 Service Manual online
ICF-CD873
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– 32 –
– 33 –
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6-6.
SCHEMATIC DIAGRAM – POWER SUPPLY Section –
•
See page 40 for IC Block Diagram.
• Waveforms
– MAIN Board –
– MAIN Board –
1
IC601
2
(XT) (RADIO ON mode)
1 V/DIV, 100 ns/DIV
2
IC401
%•
(X1) (RADIO ON mode)
1 V/DIV, 100 ns/DIV
3
IC601
%∞
(XT1) (RADIO ON mode)
1 V/DIV, 10
µ
s/DIV
4
IC501
1
(FEO) (CD PLAY mode)
100 mV/DIV, 50 ns/DIV
5
IC501
!ª
(CLK), IC502
!¶
(CLK0)
(CD PLAY mode)
5 V/DIV, 10
5 V/DIV, 10
µ
s/DIV
6
IC501
@º
(XLT), IC502
!§
(XLT0)
(CD PLAY mode)
5 V/DIV, 200 ns/DIV
5 V/DIV, 200 ns/DIV
7
IC501
#¡
(RF O), IC502
#§
(RF)
(CD PLAY mode)
200 mV/DIV, 500 ns/DIV
200 mV/DIV, 500 ns/DIV
8
IC501
$™
(TEO) (CD PLAY mode)
100 mV/DIV, 500 ns/DIV
9
IC502
$™
LRCK (CD PLAY mode)
2 V/DIV, 10
µ
s/DIV
!º
IC502
$§
(BCK) (CD PLAY mode)
2 V/DIV, 200 ns/DIV
!¡
IC502
&£
(XTAI) (CD PLAY mode)
500 mV/DIV, 50 ns/DIV
!™
IC50
1
(XOUT) (RADIO ON mode)
500 mV/DIV, 10
µ
s/DIV
3.6 Vp-p
239 ns
3.7 Vp-p
238 ns
3.2 Vp-p
30.5
µ
s
Approx.
136 mVp-p
136 mVp-p
5.4 Vp-p
14.3
µ
s
5.2 Vp-p
102 ns
1.3
±
0.5 Vp-p
Approx.
144 mVp-p
144 mVp-p
5.3 Vp-p
22.8
µ
s
5.3 Vp-p
472 ns
1.4 Vp-p
59 ns
1.3 Vp-p
13.3
µ
s
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
5
: fusible resistor.
•
C
: panel designation.
•
U
: B+ Line.
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : STANDBY
no mark : STANDBY
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Abbreviation
AUS
: Australian model
CND : Canadian model
IT
IT
: Italian model
Note:
The components identi-
fied by mark
The components identi-
fied by mark
!
or dotted
line with mark
!
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
!
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
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