Daewoo DDT-21H9ZDF(21"), Service Manual

Page: 36 / 116

-35-
Service Manual CP-099/FS
BLOCK DIAGRAM OF EACH CHANNEL
2
1
8
GND
(3,4)
35 35
1k
0.8k
20k
(12,9)
(11,6)
(10,7)
15
14
13
40k
5
Vpp
REFERENCE
VOLTAGE
350
PIN FUNCTION
11
12
13
14
15
Green Cathode Current
Green Feedback
Blue Output
Blue Cathode Current
Blue Feedback
Provides the video processor with a copy of the DC current flowing into the green
cathode, for automatic cut-off or gain adjustment, If this control is not used,
Pin 11 must be grounded.
Output driving the feedback resistor network for the green amplifier.
Output driving the blue cathode. Pin 13 is internally protected against CRT arc
discharges by a diode limiting the output voltage to V
DD
.
Provides the video processor with a copy of the DC current flowing into the blue
cathode, for automatic cut-off or gain adjustment, If this control is not used,
Pin 14 must be grounded.
Output driving the feedback resistor network for the blue amplifier.
No Function Description