Schematic Diagram (Main Section 2/2) - Sony CFD-V5 Service Manual

CFD-V5
6-5. SCHEMATIC DIAGRAM – MAIN SECTION (2/2) –
r Waveforms
1
1.5–2.0Vp-p
IC701 rj
VOLT/DIV : 0.5 V AC
TIME/DIV : 0.5 µsec
RF
2
1.7Vp-p
16.9MHz
IC702 y;
VOLT/DIV : 0.5 V AC
XOUT
TIME/DIV : 20 nsec
Note:
• 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.
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.
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signa conditions.
no mark :CD PLAY
• 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.
J : CD
– 27 –
z Refer to page 30 - 31 for IC Block Diagrams.
– 28 –
IC BLOCK DIAGRAMS
z
IC1 CXA1238S
30 29 28 27
VCO
MONO/ST
SELECT
1 2 3 4
IC301 TA2068N
24 23 22
15k
LINE
TAPE
BUF AMP
A1
NAB
AMP1
1 2
– 29 –
26 25 24 23 22 21 20 19 18 17 16
FM FRONT-END
AM FRONT-END
REG
FM IF/
MPX REG. DISCRI
1/2 AM
PD1
IF/DET
COUNTER
1/2
TUNING
PD2
COUNTER INDICATOR
AUTOBLEND
MUTING
BAND PASS
MUTE
RIPPLE
DECODER AMP
FILTER
5 6 7 8 9 10 11 12 13 14 15
21 20 19 18 17 16 15 14 13
1k 1k
10k 10k
LOGIC
1k
10k
6k
10k
6k 10k
7dB 7dB
MONITOR
MONITOR
AMP
AMP LINE
10k 10k
BUF AMP BUF AMP
B1 B2
TAPE
10k
10k
BUF AMP
A2
MIC
10k
10k MUTE
AMP1
10k 10k
ON
ALC1 ALC2
NAB
1k
26dB 26dB
AMP2
REC REC
DET
AMP1 AMP2
10k
2.1
REF AMP
3 4 5 6 7 8 9 10 11 12
– 30 –