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5-7.
SCHEMATIC DIAGRAM — CD SECTION —
• Refer to page 34 for IC Block Diagrams.
PD
LD
— 31 —
28
24
— 32 —
• Waveform
4
1.0V/div
IC703 &¡
50nsec/div
3.5Vp-p
16.9344MHz
5
0.2V/div
IC703 #∞
0.5µsec/div
1.2 ± 0.2Vp-p
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 ! or dotted line
with mark ! are critical for safety.
Replace only with part number specified.
• 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
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
J
: CD
— 33 —
5-8.
IC BLOCK DIAGRAMS
IC1
CXA12138S
30
29
28 27
26 25 24 23 22 21
20
19
18
17
16
FM FRONT-END
AM FRONT-END
REG
FM IF/
VCO
MPX REG.
DISCRI
1/2
AM
PD1
COUNTER
IF/DET
1/2
TUNING
COUNTER
PD2
AUTOBLEND
INDICATOR
MONO/ST
MUTING
SELECT
BAND PASS
MUTE
RIPPLE
DECODER AMP
FILTER
1
2
3
4
5
6
7
8
9
10
11
12
13 14 15
IC701
CXA1992BR
39
38
37
36
35
34
33
32
31
30
29
28
VEE
–
+
RF SUMMING
PD2 IV
PD1 IV
AMP
AMP
AMP
FE_BIAS
40
VCC
APC
VEE
F
41
–
LASER POWER CONTROL
+
F IV AMP
VCC
VCC
FE AMP
VCC
E
42
–
+
E IV AMP
VEE
+
–
EI
43
DFCT
+
VEE
–
LEVEL S VEE
VEE
VEE
44
VEE
FO. BIAS
WINDOW
VCC
IIL
MIRR
+
COMP.
↓
–
TTL
TEO
45
+
FOK
TRK. GAIN
–
WINDOW COMP.
+
+
–
–
E-F BALANCE
LPFI
46
+
WINDOW COMP.
+
–
FOH
–
FOL
TGH
IIL DATA REGISTER
TGL
TEI
47
INPUT SHIFT REGISTER
BALH
–
ADDRESS DECODER
BALL
+
SENS SELECTOR
ATSC
OUTPUT DECODER
TZC
ATSC
48
–
FZC
+
ATSC
WINDOW
COMP.
DFCTO
IFB1-6
FS1-4
TG1-2
TM1-7
PS1-4
TZC
49
–
BAL1-4
+
TOG1-4
DFCT
TZC COMP.
TM1
TDFCT
50
TRACKING
VCC
PHASE COMPENSATION
TG1
TM4
VC
51
VCC
TM7
VEE
VCC
FOCUS
FS1
PHASE COMPENSATION
TM3
FZC
52
+
–
FS2
DFCT
Charge
up
FSET
FZC COMP.
TG2
FS4
VEE
2
3
4
5
6
7
8
9
10
11
12
1
— 34 —
CFD-V37
27
26
SENS2
IIL
↓
25
SENS1
TTL
24
C. OUT
23
XRST
22
DATA
TTL
↓
21
XLT
IIL
20
CLK
19
LOCK
VCC
18
VCC
ISET
17
ISET
VCC
VCC
16
SL_O
TM6
15
SL_M
TM5
14
SL_P
VEE
VEE
TM2
13
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