Sony ZS-2000 Service Manual page 44

• IC BLOCK DIAGRAM
IC1 LA1833N
OSC AM AM AM AM FM
AFC
OUT OSC IN RF IN AGC DET OUT DET OUT
24 23 22 21 20 19 18
ALC
AM AM AM
OSC MIX RF. AMP
BUFF
AGC
AM AM
IF DET
AM/FM
LEVEL
COMP
IF
DET
BUFF
S-CURVE
FM
TUNING
IF
DRIVE
FM
DET
REG GND
1 2 3 4 5 6 7
FM AM REG AM GND TU ST LED
IF IN MIX OUT IF IN LED
IC2 LC72137-D
NC 1
CE 2
DI
CCB
I/F
CL 4
DO 5
REFERENCE
DIVIDER
B01 6
PHASE
12BITS
DETECTOR
PROGRAMMABLE
B02 7
CHARGE
DIVIDER
PUMP
B03 8
UNLOCK
I01 9
DETECTOR
POWER ON
I02 10
RESET
SWALLOW
COUNTER
1/2
1/16,1/17
4BITS
UNIVERSAL
COUNTER
IFIN 11
PLL MPX PILOT R L
IN IN DEL OUT OUT
17 16 15 14 13
DECODER PILOT
ANTI-BIRDIE CANCEL
P-DET STEREO
Ø SW
π
VCO FF FF FF PILOT
304kHz 38k 19k/2 19k/0 DET
VCC
8 9 10 11 12
FM DET VCC IF OUT BAND ST
S/W S/W
IC790 BA6418N
MOTOR
SWITCH
22 NC
DRIVE
MOTOR
SWITCH
DRIVE
21 XOUT
REG
20 XIN
1 2 3
4 5 6
19
AOUT
18 AIN
17 PD
16 VSS
15 VDD
14 B04
13 FMIN
12 AMIN
– 61 –
IC701 CXA1992BR
39 38
PD2 IV PD1 IV
AMP AMP
FE BIAS 40
VCC
F 41
F IV AMP
VCC
E 42
E IV AMP
EI 43
TGFL
VEE
VEE
VEE 44
TEO 45
E-F BALANCE
WINDOW COMP
LPF1 46
TEI 47
ATSC 48
ATSC
WINDOW
7 8 9
COMP
TZC
49
TZC COMP
VCC
TDFCT 50
DFCT
VC 51
VCC
VEE
FZC 52
FZC COMP
1 2
37 36 35 34 33 32 31 30
VEE
RF SUMMING AMP
APC
VEE
LASER POWER CONTROL
FE AMP
VCC
VEE
VEE
VEE
MIRR
TRK GAIN
WINDOW COMP
FO BIAS
WINDOW
COMP
VCC
FOK
FOH
FOL
TGH IIL DATA REGISTER
INPUT SHIFT REGISTER
TGL
SENS SELECTOR
BALH
OUTPUT DECODER
BALL
ATSC
TZC
FZC
DFCTO IFB1–6 FS1–4 TG1–2
BAL1–4
TM1
TOG1–4
TRACKING
PHASE COMPENSATION
TG1
VCC
FOCUS
FS1
PHASE COMPENSATION
DFCT
FS2
CHARGE
UP
FS4
VEE
3 4 5 6 7 8
– 62 –
29 28 27
26 SENS2
IIL
25 SENS1
TTL
24 C OUT
VCC
23 XRST
22 DATA
TTL
DFCT
21 XLT
IIL
IIL 20 CLK
TTL
19 LOCK
VCC 18 VCC
17 ISET
ISET
TM1–7 PS1–4
VCC VCC
TM6
TM4
16 SL O
SL M
15
TM7
VEE VEE
TG2
FSET
14 SL P
TM2
9 10 11 12 13