Daewoo DTK-28 Series, Service Manual, Page: 39 / 71

CP-850/F Service Manual
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4.7 TDA835XJ VERTICAL AMPLIFIER
The TDA835xJ are power circuit for use in 90 and 110 colour deflection systems for field frequencies of 25 to 200Hz
and 16/9 picture tubes. The circuit provides a DC driven vertical deflection output circuit, operating as a highly efficient
class G system. Due to the full bridge output circuit the deflection coils can be DC coupled.
The IC is constructed in a Low Voltage DMOS process that combines Bipolar, CMOS and DMOS devices. MOS
transistors are used in the output stage because of the absence of second breakdown.
4.7.1 TDA8358J
An East-West output stage is provided that is able to sink current from the diode modulator circuit.
Features :
Few external components
Highly efficient fully DC-coupled vertical output bridge circuit
Short rise and fall time of the vertical flyback switch
Guard circuit
Temperature (thermal) protection
High EMC because of common mode inputs
East-West output stage
VCC1
VCC
10
11
12
9
IN2-
TDA8946J
IN2+
MODE
SVR
STANDBY/
MUTE LOGIC
3 16
IN1-
IN1+
8
6
1
4
17
14
2 15
MBK933
OUT1-
OUT1+
OUT2-
OUT2+
GND2
GND1
Block Diagram TDA8946J
SHORT CIRCUIT
AND
TEMPERATURE
PROTECTION
VCC2