Pin Details of IC KA2914

Pin Details of IC KA2914

Substitute : TA7680AP

Functions :

  1. VIF
  2. SIF
  3. Video Pre-amplifier
  4. Video detector
  5. IF AGC
  6. RF AGC

Pin

No.

FUNCTION
Voltage
1.
Volume control
0-6.7
2.
Noise filter biasing
2.7
3.
Audio output
7
4.
Ground (-Ve supply voltage)
0
5.
AGC detector
7.3
6.

Decoupling capacitor for

DC feedback loop of IF amplifier

4.9
7.
Balanced PIF input
4.8
8.
Balanced PIF input
4.8
9.

Decoupling capacitor for

DC feedback loop of IF amplifier

4.9
10.
RF AGC
6.4
11.
RF AGC output
3.9
12.
PIF ground
0
13.
AFT output -1
7.2
14.
AFT output -2
5.8
15.
Video signal output
3.6
16.
AFT tank
4.2
17.
Video tank IF dtector circuit
7.8
18.
Video tank IF dtector circuit
7.8
19.
AFT tank
4.2
20.
Positive (+Ve supply voltage)
11.7
21.
Sound IF input (5.5MHz.)
4.6
22.
Sound IF detector (5.5MHz.)
4.6
23.
De-emphasis(audio output
5.3
24.
Soud IF detector (tank circuit)
4.5



 
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