Block Diagrams - Zenith A19A02D Service Manual

1 2 3
G
3
F
2
E
BLOCK DIAGRAM No. 1
ICX3401
D
C
VERTICAL DRIVER
1 2 3 4 5
B
BLOCK DIAGRAM No. 2
IC2101
A
CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER "X" IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.
GA1 BLOCK DIAGRAMS
4 5
4
1
6 7
6 7 8
56 55 54 53 52 51 50 49 48 47 46 45
SIF SIF V
cc
GND V
VCO cc
BPF
FM
Limiter
DET
AFT
o
90
ACC
Q I
DET DET
AGC LOCK
DET DET
SW
APC
RF
AGC
PIF PIF
VCXO
ATT
GND V
cc
1 2 3 4 5 6 7 8 9 10 11 12
BLOCK DIAGRAM No. 3
WIDEBAND
IN
5
BYPASS
TO PIN 18 SWITCH
SAP TRAP
STEREO SENSE 20
STEREO/MONO 21
VCC
19
1/2 VCC
1/2 VCC
BYPASS
SUPPLY
9
8
6
ALL SYMBOLS WITH "M" ON END OF DESIGNATOR
6-7
INDICATE SURFACE MOUNTED COMPONENT
9 10 11
44 43 42 41 40 39 38 37 36 35 34 33 32
H. OUT
Clamp
Black
Streatch
3.58 WPS
x2
Trap
32FH
AFC-1
DC
VCO
Smoothing
Restoretion
Sharpness
H C/D
Y-DL
Contrast
H SEPA
Color DEMO
WPL
Killer TINT LPF
V SEPA
Bright
MTX
V. RAMP
Analogue RGB
Cut-off/Drive
D. V
cc
GND 3.3 V
13 14 15 16 17 18 19 20 21 22 23 24
ICX2200
M
DE-EMP
A 14 L
L+R
T
R
L-R
I 13 R
STEREO X
7 2ND
DEMO
DE-EMP
11
DE-EMP L-R
VCA 10
L-R GAIN
VCC
TO 1/2
VCC
OPTIONAL
SUPPLY
12 L-R
BPF
GAIN SET
18 17 16 15
BPF DET TIME
TO 1/2 VCC
CORNER
CONSTANT
SUPPLY
PIN 8
BLOCK DIAGRAM No. 4
IC1400
12
31 30 29
X-RAY
H. RAMP
AFC-2
V C/D
Bus Interface
H. V
cc
9.0 V
25 26 27 28
GA SHEET 7