Sony CFD-ZW755 Service Manual page 24

IC Block Diagrams (MAIN SECTION)
z
IC1 TA2149N
GND1 1 24 FM RF OUT
FM RF
23 VCC1
FM RF IN 2
AM 22 AM RF OUT
AM LOW CUT 3 MIX
FM FM
MIX OUT
4 21 FM OSC
OSC
MIX
AM
OSC 20 AM OSC
BUFF
VCC2 5 BUFF 1/1OR
19 OSC OUT
LEVEL
1/16
DET
AM IF
AF IF IN
6
ST 18 ST IND
IF BUFF
FM IF
FM IF IN 7 1/8
SW
GND2 8
AM
DET
IF REQ 17 IF OUT
AF BUFF
AGC
AGC 9
16 DET OUT
FM AF
QUAD 10 DET 15
MPX IN
ST/MO
R OUT 11
FM/AM
MUTE
14 LPF2/MO-ST
VCO
L OUT 12
DIVIDE
13
DECODE LPF1/BAND
IC2 LC72137-D
22 21 20 19 18 17 16 15 14 13
FILTER
POWER
ON
PHASE DETECTOR RESET
REFERENCE
DIVIDER CHARGE PUMP
1/2
UNLOCK
DETECTOR
SWALLOW COUNTER
1/16. 1/17 4 BITS
12 BIT PROGRAMBLE
DIVIDER
OCB DATA SHIFT REGISTER UNIVERSAL
I/F LATCH CONTROLER
1 2 3 4 5 6 7 8 9 10
– 40 –
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IC301 TA2068N
24 23 22 21
1k
10k
MONITOR
15k
AMP
6k
10k
LINE
BUF AMP
10k
B1
TAPE
10k
BUF AMP
A1
10k
10k
NAB
AMP1
26dB
REC
AMP1
REF AMP
1 2 3 4 5
IC304 BA5417
12
T. S. D
BS BS
1 2 3 5 6
4
11
20 19 18 17 16 15 14 13
1k
10k
1k
LOGIC
MONITOR
10k
AMP
6k
7dB 7dB
10k
LINE
BUF AMP
10k
B2
TAPE
10k
BUF AMP
A2
MIC
10k
10k MUTE
AMP1
ALC1 ALC2 ON
NAB
AMP2
26dB 1k
DET
REC
AMP2 10k
2.1
6 7 8 9 10 11 12
ST. BY
FILTER
7 8 9 10 11 12 13 14 15
– 41 –
IC Block Diagrams (CD SECTION)
z
IC701 CXA1992BR
39 38 37 36 35 34 33
VEE
RF
PD2 IV
PD1 IV
SUMMING
AMP
AMP AMP
F. BIAS
40
VCC
APC
VEE
F 41
LASER POWER CONTROL
F IV AMP
VCC FE AMP
42
E
E IV AMP
43
EI
VEE
LEVEL S VEE
VEE
44
VEE VEE
FO. BIAS
WINDOW
VCC
COMP.
FOK
45
TO TRK. GAIN
WINDOW COMP.
E-F BALANCE
46 WINDOW COMP.
LPFI
FOH
FOL
TGH
TGL
TI 47
BALH
BALL
ATSC
TZC
48
ATSC FZC
ATSC
WINDOW
COMP.
DFCTO IFB1-6
TZC 49
DFCT
TZC COMP.
TM1
TDFCT 50 TRACKING
VCC PHASE COMPENSATION
TG1
51
VC
VEE
VCC FOCUS
FS1
PHASE COMPENSATION
52
FZC
FS2
DFCT
FZC COMP.
FS4
1 2 3 4 5 6 7
IC702 BA6898FP
28 27 26 25 24 23 22 21 20 19 18 17
D D VCC VCC D D
LEVEL SHIFT LEVEL SHIFT
T. S. D.
DRIVER
REGULATOR, BIAS,
MUTE
T. S. D. MONITOR
LEVEL SHIFT LEVEL SHIFT
D D D D
1 2 3 4 5 6 7 8 9 10 11 12
– 42 –
32 31 30 29 28 27
26 SENS2
IIL
↓ 24 SENS1
TTL
VCC
VCC
24
C. OUT
VEE
DFCT
23 XRST
22
DATA
IIL
MIRR
↓
TTL TTL
↓ 21
XLT
IIL
20
CLK
IIL DATA REGISTER,
INPUT SHIFT REGISTER, 19 LOCK
ADDRESS DECODER,
SENS SELECTOR,
OUTPUT DECODER
VCC 18 VCC
FS1-4 TG1-2 TM1-7 PS1-4
ISET
17 ISET
BAL1-4
TOG1-4
VCC VCC
16 SLO
TM4 TM6
15 SL-
VCC
TM7
TM5
TM3
14 SL+
VEE VEE
TM2
Charge
FSET
up
TG2
VEE
8 9 10 11 12 13
16 15
13 14