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5-12. IC BLOCK DIAGRAMS
IC301 CXD8505BQ (MAIN BOARD (2/2))
32 31
SYSM
33
"O" DETECT
MUTE
ATT
34
CIRCUIT
SHIFT
35
LATCH
36
XINT
37
MODE
XDCK
38
ATT
FIR1
S/P
XLRCK
39
DATA1
40
41
VSUD(D)R
DF VSS
42
43
VSUB(D)L
44
INAF
ATT
FIR1
512FS0
45
TIMING
256FS0
46
CIRCUIT
128FS0
47
I NV1
48
I NV01
49
I NV02
50
MUTE R
51
52 53 54 55 56 57 58 59 60
IC103 CXA2568M (BD BOARD)
APC PD AMP
VEE
1
HOLD
VEE
AGCVTH
2
VREF
3
LD
PD
4
A
5
B
6
C
7
D
8
VEE
9
VEE
VC
F
10
E
11
VC
VC BUFFER
VC
12
VC
30 29 28 27 26 25 24 23 22 21 20
PLM
3RD ORDER
L. I. P.
FIR2
FIR3
NOISE
(x 8)
SHAPER
IIR
CLOCK
AC, DC
GENERATOR
DITHER
3RD ORDER
L. I. P.
FIR2
FIR3
NOISE
(x 8)
SHAPER
PLM
IIR
61 62 63 64
VCC
24
VCC
23
LC/PD
VCC
22
LD_ON
APC LD AMP
21
HOLD_SW
20
AGCCONT
VC
VCC
(50%/30%
OFF)
RF_BOT
19
VC
VEE
18
RFTC
RF SUMMING AMP
RF_EQ_AMP
RF_1
17
VC
VC
RFO
16
RFE
15
ERROR AMP
VC
FOCUS
14
FE
VC
13
TE
TRACKING
VC
ERROR AMP
VCC
VC
VEE
— 39 —
IC302 CXA8055M (MAIN BOARD (2/2))
ANALOG
CIREF
1
VOLUME
NC
2
CONTROL
AGND
3
CIRCUIT
NC
4
IOR–
5
IOR+
6
CONSTANT
19
VSS2
C5
7
CONTROL
18
R2(+)
CIRCUIT
C6
8
17
VSS
16
R2(-)
C7R
9
15
VDD
AVEES
10
14
VDD2
13
VSUB(A)R
AVEES
11
LOGIC
12
XVSS
C4R
12
11
XVSS
10
C3
13
X IN
9
X OUT
DVEE
14
8
XVDD
15
C1R
7
VSUB(A)L
6
16
ECL
VDD2
DGND
SWITCHING
5
VDD
1N1–R
17
CIRCUIT
4
L2(-)
1N1+R
18
3
VSS
2
L2(+)
NC
19
1
VSS2
20
1N2+R
21
1N2–R
VIN1
VIN2
IC551 BA6780 (MAIN BOARD (1/2))
42
RIREF
1
VIN1
REFERENCE
VREF
41
VOLTAGE
40
VCNT
CIRCUIT
AGND
39
FIN1
2
38
AV
CC
37
NC
CONSTANT
36
IOL–
CONTROL
3
RIN1
CIRCUIT
IOL+
35
C7L
34
33
AVEES
IOUT
4
AVEES
32
C4L
31
5
VREF
DV
30
EE
29
DV
CC
28
C1L
VREG
6
ECL
27
DGND
SWITCHING
26
1N1–L
CIRCUIT
25
1N1+L
VCC
7
24
NC
23
1N2+L
22
1N2–L
8
OUT1+
9
IC601 LA5616 (MAIN BOARD (1/2))
1
ON/OFF
CURRENT
LIMITER
OVERHEAT
ON/OFF
PROTECT
VO1
2
CN
3
RESET
GENERATOR
EN1
4
GND
5
RES
6
ERROR
AMP
CD
7
EN2
8
VO2
9
10
— 40 —
18
VIN2
17
FIN2
16
RIN2
15
CT2
14
VEE
13
FBIN-
12
FBIN+
11
OUT2+
10
OUT2-
VREF
ERROR
AMP
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