CFD-E55L
– 35 –
– 36 –
– 37 –
– 38 –
6-8.
SCHEMATIC DIAGRAM – MAIN (TUNER) Section –
•
See page 38 for Waveform.
•
See page 52 for IC Block Diagrams.
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
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
U
: B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
) : MW/LW
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
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.
F
: FM
f
: MW/LW
1.1 to 1.3 V
• Waveforms
– CD Board –
1
IC701
1
(FEO) (CD play mode)
20 mV/DIV, 1 µs/DIV
2
IC701
ed
(RF O) (CD play mode)
500 mV/DIV, 1 µs/DIV
3
IC701
rg
(TEO),
rj
(TEI)
(CD play mode)
50 mV/DIV, 1 µs/DIV
4
IC703
wa
(MDP) (CD play mode)
1 V/DIV, 5 µs/DIV
6
IC703
rd
(BCK),
rf
(BCKI)
(CD play mode)
2 V/DIV, 200 ns/DIV
7
IC703
ts
(C4M) (CD play mode)
2 V/DIV, 100 ns/DIV
5
IC703
el
(LRCK),
r;
(LRCKI)
(CD play mode)
2 V/DIV, 10 µs/DIV
*
2) FM/LW : 3.6 Vp-p
MW
: 4.1 Vp-p
qs
IC501
uf
(TEX)
1 V/DIV, 10 µs/DIV
– MAIN Board (TUNER Section) –
0
IC2
wa
(XOUT)
500 mV/DIV, 5 µs/DIV
Approx.
97 mVp-p
Approx.
115 mVp-p
2.6 Vp-p
7.6
µ
s
6 Vp-p
22.7
µ
s
6.1 Vp-p
470 ns
6.1 Vp-p
236 ns
8
IC703
th
(WFCK) (CD play mode)
2 V/DIV, 50 µs/DIV
5.7 Vp-p
136
µ
s
9
IC703
u;
(XTAI)
500 mV/DIV, 20 ns/DIV
1.8 Vp-p
59.2 ns
*
1) FM
: 1.6 Vp-p
MW/LW: 2.1 Vp-p
– LCD Board –
qa
IC501
ea
(EXTAL)
2 V/DIV, 100 ns/DIV
240 ns
*
2 Vp-p
2.2 Vp-p
30.5
µ
s
*
1 Vp-p
13.3
µ
s
(Page 47)
(Page 40)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299