Schematic Diagram - Sony CFS-KW300S Service Manual

• SCHEMATIC DIAGRAM

• See page 15 for Waveforms.
– 9 – – 10 – – 11 –
• IC Block Diagram
– ECHO Board –
IC602 BU9255FS-E2
16 15 14
OSC
COUNTER
1 2
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
specified.
• f : internal component.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• 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
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
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 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.
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
– 12 – – 13 –
CFS-KW300S
13 12 11 10 9
A/D
STATIC
RAM
+
D/A MIX
–
3 4 5 6 7 8
1 / W or less unless otherwise
4