Read Sony CFD-V37 Service Manual online
CFD-V37
5-5.
SCHEMATIC DIAGRAM — TUNER/SYSTEM SECTION —
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
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.
•
C
: panel designation.
•
U
: B+ Line.
• Power voltage is dc 9 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground un-
der no-signal (detuned) conditions.
no mark : CD PLAY
(
no mark : CD PLAY
(
) : FM
[
] : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
• Signal path.
• Signal path.
F
: FM
f
: AM
• Abbreviation
E4
: 220V – 240V AC area
EA
: Saudi Arabia
E92
: 120V AV area
• Waveform
1
IC501
#¡
2
IC501
&¢
4.0Vp-p
4.5Vp-p
4.0MHz
500kHz
1.0V/div
0.1
0.1
µ
sec/div
1.0V/div
1.0
1.0
µ
sec/div
E92 MODEL
L2, CT1(2/4)
L1,CT1(1/4)
FM FREQUENCY
COVERAGE
L4,CT1(4/4)
E4,EA MODEL:4.7p
E92 MODEL:3.3K
FM FREQUENCY
COVERAGE
27p
FM TRACKING
220
C1 47p
E92 MODEL
E4,EA MODEL
E92 MODEL
470
L3,CT1(3/4)
AM TRACKING
AM
Mark:
Ref.No.
E4 MODEL
E92 MODEL
EA MODEL
C7
C8
C18,19
R5
5.6p
5.6p
6.8p
3.3p
1.5p
3.3p
0.01
0.015
0.01
330
470
330
SWITCH
28
28
32
— 23 —
— 24 —
— 25 —
— 26 —
• Refer to page 34 for IC Block Diagrams.
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