Sony CFS-KW300S Service Manual ▷ View online
CFS-KW300S
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• SCHEMATIC DIAGRAM
• See page 15 for Waveforms.
Note on Schematic Diagram:
• 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.
•
f
: internal component.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Total current is measured with no cassette installed.
• Power voltage is dc 12 V and fed with regulated dc power
• Power voltage is dc 12 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
no mark : FM
(
) : SW1/2
<
> : MW
[
] : TAPE PLAYBACK (DECK A)
{
} : TAPE PLAYBACK (DECK B)
〈〈
〉〉
: TAPE RECORD (DECK B)
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
f
: MW
E
: TAPE PLAYBACK (DECK A)
d
: TAPE PLAYBACK (DECK B)
G
: TAPE RECORD (DECK B)
N
: MIC INPUT
• Abbreviation
EA
: Saudi Arabia model
UAE
: United Arab Emirates model
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
• IC Block Diagram
– ECHO Board –
– ECHO Board –
IC602
BU9255FS-E2
2
1
4
BIAS
3
ECHO VR
GND
5
9
8
7
6
DALPF IN
DALPF OUT
MIX OUT
DAINT IN
DAINT OUT
VCC
MUTE
CR
ADLPF OUT
ADLPF IN
MIX IN
ADINT IN
ADINT OUT
10
11
12
15 14
13
16
A/D
D/A
STATIC
RAM
COUNTER
OSC
MIX
+
–
+
–
–
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