Pin Details of IC TDA1770A


Functions :
Pin No. Functions Voltage
1. Blanking pulse output 0.1
2. Positive(+Ve supply voltage ) 22
3. Flyback pulse output 0.1
4. Not Connected NC
5. Ground(-Ve supply voltage) 0
6. Ground(-Ve supply voltage) 0
7. Power amplifier output 10.5
8. Power amplifier supply voltage 22
9. Oscillator 3.1
10. Oscillator 0.4
11. Sync pulse input -2.7
12. Oscillator -
13. Not Connected NC
14. Height control -
15. Ground (-Ve supply voltage ) 0
16. Ground (-Ve supply voltage ) 0
17. Rump pulse generator -
18. Ramp pulse output 3.5
19. Power amplifier input (+Ve)(Non inverting input) -
20. Power amplifier input (-Ve)(inverting input) 4.4


Pin Details of IC TDA1701

Substitute : TDA1035
Functions :
Pin No. Functiions Voltage
1. 5.5 MHz sound IF input(inter carrier sound) 2
2. 5.5 MHz sound IF input(inter carrier sound) 2
3. Audio output 4
4. FM detector 4
5. FM detector 4
6. DC volume control(voltage varies with volume control setting) 2.1
7. Audio signal input 4.6
8. Tone control 9.8
9. Audio signal output 10
10. Positive supply (+ Ve terminal) 20
11. Audio amplifier (bias voltage) 11.5
12. DC volume control bias voltage 11.5
13. Ground (-Ve supply terminal) 0


Pin Details of IC TDA1670(A),TDA1670(V), TDA 1675


Substitute : TDA1675, TDA 167OV, TDA1870

Function : Vertical oscillator and vertical output ,Blanking generator

Pin No. Functions Voltage
1. It is one output of the power amplifier.It drive the yoke
by a negative ramp current (50Hz.)
13.7
2. Supply voltage for power output stage 21.4
3. Vertical oscillator (50Hz) 3.4
4. Vertical oscillator (50Hz) 0.5
5. Input for sync pulses (+Ve) (50Hz) 0.4
6. Output of the switch driver by the internal clock pulse
generated by the threshold circuits
0.5
7. The curret between Pin No.7 and ground decides the
height of the ramp (sawtooth pulse)
6.8
8. Ground (-Ve supply voltage ) 0
9. Input of the buffer (output) stage 3.9
10. Output of the buffer stage and is internal connected
to the inverting input of the power amplifier
4.9
11. Non inverting input 4.4
12. Inverting input of the amplifier 4.3
13. Output where the blanking pulse is available 1.2
14. Main supply voltage 21.4
15. Output of the flyback generator 1.4


Pin Details of IC TDA1190Z


Substitute: TDA1190, TDA 3190

Functions:
  • IF limiter amplifier
  • Aktive low pass filter
  • FM detector
  • D.C volume control
  • AF ppre-amplifier
  • AF output stage
Pin No. Functions Voltage
1. IF amplifier input(sound IF input) 2.5
2. IF decoupling capacitor for IF amplifier 2.5
3. IF decoupling capacitor 2.5
4. FM detector capacitor (tank circuit ) 2
5. FM detector capacitor (tank circuit ) 2
6. DC volume control(electronic attenuator ) 2
7. Audio frequency feedback 10
8. Conpensation for soun quality 0.2
9. Audiio frequency output 10
10. Positive(+Ve)supply voltage(Vcc) 24
11. Rippley rejection 10
12. De-emphasis (Frequency attenuator) 2.5


 
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