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25
11.
Circuit Explanation
IC function pins
1) Integrated circuits used in this model
1
TMPA882
9B
VIF
SIF
VIDO
Signal processing
RGB/output
circuit,Scan
Circuit,CPU.
2
LA784
1
Vertical scan circuit.
3
TDA7057
Sound power amplify circuit.
2) IC functions and parameters
Pins of IC
N402 LA784
1
Reference resistor
K
No Function
Reference
voltage
V
Position Negative
1 Ground
0
0
0
2 Output
13
0.45
1.9
3 Pump
25
0.5
4
Vertical scan saw-tooth wave
signal input
0.95 0.9 1.25
5
Vertical scan saw-tooth wave
signal
0.75 0.68 1.75
6 Vertical
power
25 0.5 2.95
7
Vertical power input
0.83
0.65
1.3
N701
TDA7057
Reference resistor
K
No Function
Reference
voltage
V
Position Negative
1 Power
supply 26 0.43 1.8
2 Power amplify output 10.9 0.58 1.6
3 No
used
0
4 Ground
0
0
0
5 No
used
1.2
Circuit Explanation