Schematic Diagram - Power Supply Section - Sony ICF-CD873 Service Manual

ICF-CD873
• Waveforms
– MAIN Board –
1 IC601 2 (XT) (RADIO ON mode) 6 IC501 @º (XLT), IC502 !§ (XLT0) !¡ IC502 &£ (XTAI) (CD PLAY mode)
1 V/DIV, 100 ns/DIV (CD PLAY mode) 500 mV/DIV, 50 ns/DIV
5 V/DIV, 200 ns/DIV
3.6 Vp-p
5.2 Vp-p
239 ns
59 ns
2 IC401 %• (X1) (RADIO ON mode) 102 ns
!™ IC50 1 (XOUT) (RADIO ON mode)
1 V/DIV, 100 ns/DIV
7 IC501 #¡ (RF O), IC502 #§ (RF) 500 mV/DIV, 10 µs/DIV
(CD PLAY mode)
200 mV/DIV, 500 ns/DIV
3.7 Vp-p
1.3 ± 0.5 Vp-p
238 ns
13.3 µs
3 IC601 %∞ (XT1) (RADIO ON mode)
8 IC501 $™ (TEO) (CD PLAY mode)
1 V/DIV, 10 µs/DIV
100 mV/DIV, 500 ns/DIV
3.2 Vp-p
Approx.
144 mVp-p
30.5 µs 9 IC502 $™ LRCK (CD PLAY mode)
4 IC501 1 (FEO) (CD PLAY mode)
2 V/DIV, 10 µs/DIV
100 mV/DIV, 50 ns/DIV
Approx.
5.3 Vp-p
136 mVp-p
5 IC501 !ª (CLK), IC502 !¶ (CLK0)
22.8 µs
(CD PLAY mode)
!º IC502 $§ (BCK) (CD PLAY mode)
5 V/DIV, 10 µs/DIV
2 V/DIV, 200 ns/DIV
5.4 Vp-p
5.3 Vp-p
14.3 µs
472 ns
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6-6. SCHEMATIC DIAGRAM – POWER SUPPLY Section – • See page 40 for IC Block Diagram.
1.4 Vp-p
1.3 Vp-p
– 32 – – 33 –
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1 / W or less unless otherwise
4
specified.
• 5 : fusible resistor.
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
fied by mark ! or dotted une marque ! sont critiques
line with mark ! are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part piéce por tant le numéro
spécifié.
number specified.
• U : B+ Line.
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : STANDBY
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Abbreviation
AUS : Australian model
CND : Canadian model
IT : Italian model
– 34 –