Schematic Diagram - Main (Tuner) Section - Sony CFD-E55 Service Manual

6-8. SCHEMATIC DIAGRAM – MAIN (TUNER) Section – • See page 38 for Waveform.
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• See page 52 for IC Block Diagrams.
– 36 –
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.
• f : internal component.
• U : B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : AM
(Page 47) • Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
(Page 40)
F : FM
f : AM
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• Waveforms
– CD Board – – MAIN Board (TUNER Section) –
1 IC701 1 (FEO) (CD play mode) 6 IC703 rd (BCK), rf (BCKI) 1 IC2 w; (XIN)
20 mV/DIV, 1 µs/DIV (CD play mode) 500 mV/DIV, 5 µs/DIV
2 V/DIV, 200 ns/DIV
Approx.
97 mVp-p
6.1 Vp-p
13.3 µ s
2 IC701 ed (RF O) (CD play mode)
470 ns
– LCD Board –
500 mV/DIV, 1 µs/DIV
7 IC703 ts (C4M) (CD play mode)
1 IC501 ea (EXTAL)
2 V/DIV, 100 ns/DIV
2 V/DIV, 100 ns/DIV
1.1 to 1.3 V
6.1 Vp-p
3 IC701 rg (TEO), rj (TEI)
(CD play mode)
50 mV/DIV, 1 µs/DIV
236 ns
240 ns
2 IC501 uf (TEX)
8 IC703 th (WFCK) (CD play mode)
1 V/DIV, 10 µs/DIV
2 V/DIV, 50 µs/DIV
Approx.
115 mVp-p
5.7 Vp-p
4 IC703 wa (MDP) (CD play mode)
1 V/DIV, 5 µs/DIV
30.5 µ s
136 µ s
9 IC703 u; (XTAI)
2.6 Vp-p
500 mV/DIV, 20 ns/DIV
1.8 Vp-p
7.6 µ s
5 IC703 el (LRCK), r; (LRCKI)
(CD play mode)
2 V/DIV, 10 µs/DIV
59.2 ns
6 Vp-p
22.7 µ s
– 38 –
CFD-E55
1.6 Vp-p
4.4 Vp-p
2.2 Vp-p