Daewoo CP-885, Service Manual

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Service manual WP 895/895F, CP885/885F
4-5 TDA835xJ Vertical Amplifier
The TDA835xJ are power circuit for use in 90
o
and 110
o
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.
4-5-1 TDA8357J
Features :
- Few external components
- High 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
Pinning
Pin Symbol Description
1 Vi(pos) input voltage (positive)
2 Vi(neg) input voltage
(negative)
3 Vp supply voltage
4
V
OB
output voltage B
5 GND ground
6 Vflb flyback supply voltage
7
V
OA
output voltage A
8 V
O(guard)
guard output voltage
9 V
M
input measuring
resistor