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Daewoo DTR-14D9ME Service Manual page 43

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PIN FUNCTION
N
Function
1
Blue Input
2
Vcc
3
Green Input
4
Red Input
5
V
DD
6
Red Cathode Current
7
Red Output
8
Ground
9
Red Feedback
10 Green Output
11 Green Cathode Current
12 Green Feedback
13 Blue Output
14 Blue Cathode Current
15 Blue Feedback
BLOCK DIAGRAM OF EACH CHANNEL
BLOCK DIAGRAM OF EACH CHANNEL
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Description
Input of the "blue" amplifier. It is a virtual ground with 3.8V bias voltage,
15 microamperss input bias current with 14KΩ input resistance.
Low voltage power supply, typically 12V.
See Pin 1.
See Pin 1.
High voltage power supply, typcally 200V.
Provides the video processor with a copy of the DC current flowing into
the red cathode, for automatic cut-off or gain adjustment. If this control
is not used, Pin 6 must be grounded.
Output driving the red cathode. Pin 7 is internally protected ahainst CRT
arc discharges by a diode limiting the output voltage to V
Also connected to the heatsink.
Output driving the feedback resistor network for the red amplifier.
See Pin 7.
See Pin 6.
See Pin 9.
See Pin 7.
See Pin 6.
See Pin 9.
V
DD
5
40k Ω
0.8kΩ
1k Ω
2
1
35 Ω
35 Ω
(3, 4)
350 Ω
GND
8
15
(12, 9)
20k Ω
14
(11, 6)
REFERENCE
VOLTAGE
-48-
.
DD
13
(10, 7)

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