Sanyo EP58B - Manual (Page 13)

LA7840
1 2 3 4 5 6 7
AMP
Thermal
Protection Pump UP
+
-
GND
Ver.OUTPUT
OUTPUT STAGE V
CC
NON INV.INPUT
INVERTING INPUT
V
CC
PUMP UP OUT
LA76843N
23 24 SANYO TV . VCR SANYO TV . VCR
AUDIO OUTPUT
RF AGC
54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
+
+
+
IF IN
IF
VCC5V
VCC
AFT
ABL R
IN
G
IN B
IN
R
OUT
G
OUT
B
OUT
VER
OUT HOR
OUT SYNC
OUT
FB
IN
RGB
VCC 9V
+
HOR
VCC 9V
+
+
EXT
AUDIO
IN
VIDEO
OUT
I IN-V IN
[S-C IN]
V/C
GND
EXT-V IN
[Y-IN]
S CARRIER OUT
V/C
VCC 5V
+
+
+ +
+
+ + + VCO
X-RAY
SVO
CCD/
HOR
GND
REF
HS VS FBP
IN
FSC
SAW
FILTER
BPF
SPLL
BPF
FM
DET
SW
DC
VOL
IF AGC
VIDEO
DET
VIDEO
AMP
VIDEO
SW
SND
TRAP
AFT
CLMP
TRAP
SW
AOC
KIL DEMO
APC1 TINT FILTER
ADJ
VXO CW X-RAY
FBP
HOR
VCO
HOR
C/D COLOR
CLAMP
RESET
BUS ABL
CLAMP DRIVE/OUT-OFF
OSD
SW
RGB
MATRIX
BPF
(BYPASS)
DELAY
LINE
PEAKING
CORING
DC
REST
WPL
SYNC
SEP
A2C
PLL
RF AGC
LIM
AMP
VIF
CLMP
OSD
FIX GAIN
CONTRAST
BRIGHT
1/256
AFC1
AFC2
PHASE
SHIFTER
HOR
OUT HOR
VCC VER
RAMP
C_SYNC
OUT
VER
C/D
VER
SEP
BLACK
STRETOH
Block Diagram
Block Diagram
I 2 C Bus Control Lineup
LA76810 Series
Overview
Functions and Features
Overview
Functions
The LA76810 series are I 2 C bus controller ICs that support the different TV broadcast formats used worldwide and aim for
rationalization of color TV set design, improved manufacturability, and lower total costs
Single crystal multiformat system that supports the different TV broadcast formats used worldwide
ICs optimal for each individual broadcast standard deployed as a pin-to-pin compatible lineup
· Multiformat system: LA76818A (YCbCr support), LA76828N (YCbCr and E/W support)
· NTSC system: LA76843N/LA76835A (YCbCr and E/W support), LA76835NM (YCbCr and E/W support)
Adjustment-free VIF/SIF, audio trap/audio bandpass filters
Adjustment-free horizontal resonator system
Simplified SG
Supply voltage: VCC = 5 V/9 V
Package: DIP54S (600mil), QIP80E (14 20) (LA76835NM only)
VIF/SIF
· Adjustment-free VCO, buzz canceller
· RF AGC/video level/FM level control
Black stretch, sharpness control with coring on/off control, built-in variable Y system filters (Y-DL and chrominance trap)
Chrominance bandpass filter, demodulation angle control
Vertical Output IC
Low power operation achieved by using integrated charge pump circuit
Vertical output circuit
Thermal protection circuit
Excellent crossover characteristics
Supports DC coupling
Package: SIP7H
The LA7840 is a vertical deflection output IC for high-definition TV and CRT displays in systems that use a bus control system
signal-processing IC. This IC can directly drive (including the DC component) the deflection yoke from the sawtooth wave output
from the bus control system signal-processing IC. The color TV vertical deflection system adjustment function can be controlled
from the bus system when this IC is used in conjunction with a SANYO LA768X or LA769XX series TV bus control system signal-
processing IC.
The LA7840 provides a maximum deflection current of 1.8 A p-p, and thus is optimal for small to medium diameter CRTs.