Zenith H19F34DT Series, Service Manual

Page: 57 / 62

AFT
OUT
SAW
VIF
IN
IF IN
63
64
2
45
46
RF AGC
OUT
DELAY ADJ
RF AGC
59
IF AGC
VIF
AMP
VCO
VIDEO
DET
APC
DET
VIF VCO ADJ
DEFEAT
AFT OUT
AFT
GAMMA
BLACK STRETCH
GAMMA
BLACK
STRETCH
CLAMP
SHARPNESS
VIDEO
TONE
DELAY
Y SW
LPF
LPF
F. TRAP
CHROMA
TRAP
VCO
ADJ
ACL/ABCL
Y-SW OUT
31
33
X2
41
VIDEO
MUTE
VIDEO
MUTE
DET
ADJ
TAKE OFF
CHROMA
BPF
REF
FILTER
LOCK
DET
DEMODULATOR
TINT ANGLE
COLOR
WHITE
BLUE
BACK
RGB
MATRIX
CONTRAST
CONTRAST
BRIGHT
BRIGHT
SYNC
DEP
SYNC
SLICE
DRIVE
DRIVE
AMP
R
B
EQ
ELIMINATE
VIDEO
OUT
1.2Vp-p
RESET
to MCU
MCU VDD
5V
8.7V
11V
5.7Vreg
RESET
POWER ON
CONTROL
8.7V
5.7V
P-ON-ON
Vcc 8V
Vcc 5V
from MCU
INTER
CARRIER
OUT
LIMITER
IN
LIMITER
HPF
FM
DET
AF
AMP
R EXT
INPUT
G EXT
INPUT
B EXT
INPUT
5V
DIRECT OUT
EXT AUDIO IN
ATT
ATT
MUTE
FM
AUDIO SW
BUS
I/F
VIF Vcc VIF GND
V SYNC
TRIG
CLAMP
HV
BLK
G
R
B
CUT OFF
VERTICAL
COUNT DOWN
SERVICE SW
V. RAMP
BGP
GEN
NORIZONTAL
COUNT DOWN
V. COINB
V. SHIFT
V. SIZE
AFC 2
Intelligent
Monitoring
Intelligent Monitoring
I I VCO
AFC I
AFC GAIN
I I
COINCI.
Hi Vcc
H COINB
I I-pHASE
NC
H STOP
DEF
Vcc
8V
V. PULSE
OUT
VERTICAL
V. OUT
DY
AUDIO
OUT
SDA
SCL
FAST BLK
R IN
G IN
B IN
R
G
B
OUT PUT
H. OUT PUT
DEF
GND
CLK CONT
VCXO
VIDEO/CHROMA
GND
VCO
ADJ
HVCO ADJ
INV
FBP
INV
OUT
FBP
IN
fsc
OUT 1
5V
3.58 MHz
5V
VIDEO/CHROMA
Vcc
CLOCK
CONTROL
CHROMA
APC
DET
ACC
DET
ACC
HPF
EXT IN/C IN
1Vp-p
DL
TIME
DL
TIME
SW
TV IN/Y IN
1Vp-p
KILLER
DET
KILLERB
US/JPN
NC
NC
62 61 60
55
58 42 32
30
47 49 28 50
48 4 3
57
56 52 54 53
43
51
26
27
24
23
22
21
14
15
16
5
6
20
1
18
13
12
11
9 8
44
7
10 19 17 36
35
29 34
40 39 37
25 38
This schematic refers to
CH Chassis models
H19F34DT
H20F34DT
H25F34DT
H25F39DT
H27F34DT
H27F39DT
H25F36DT
H27F36DT
H32F36DT
1 2 3 4 5 6 7 8 9 10
G
D
C
B
E
F
A
CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER ìXî IN TH EIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED. ALL SYMBOLS WITH ìMî ON TH E DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT.
6-12 SR25-3828VD0171B
Block Diagram