Teac 11AK33, Service Manual

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TDA 4470
Features:
n 5 V supply voltage; low power consumption
n Aktive carrier generation by FPLL principle (frequency - phase - locked - loop) for true synchronous demodulation.
n Very linear video demodulation, good pulse response and execellent intermodulation figures.
n VCO circuit is operating on picture carrier frequency, the VCO frequency is switchable for L’ - mode.
n Alignmend - free AFC without external reference circuit, polarity of the AFC curve is switchable.
n VIF-AGC for negative modulated signals (peak sync detection) and for posidive modulation (peak white / black level detector).
n Tuner AGC with adjustable take over point
n Alignment-free quasi parallel sound ( QPS ) mixer for FM / NICAM sound IF signals.
n Intercarrier output signal is gain controlled (necessary for digital sound processing).
n Complete alignment - free AM demodulator with gain controlled AF output.
n Separate SIF - AGC with avarage detection.
n Two independent SIF inputs.
n Parallel operation of the AM demodulator and QPS mixer (for NICAM - L stereo sound)
n Package and relevant pinning is compatible with the single standard version TDA4472, simplifies the design
of an univeral IF module
PINNING
1. SIF1 input (symmmetrical)
2. SIF1 input (symmmetrical)
3. Input selector switch
4. Ground
5. SIF - AGC (time constant)
6. VIF input (symmetrical)
7. VIF input (symmetrical)
8. VIF AGC (time constant)
9. Ground
10. Take over point, tuner AGC
11. Tuner AGC output current
12. Video ouput
13. Standart switch
14. L’ switch
15. Black level capacitor
16. Ground
17. Internal reference voltage
18. Loop filter
19. AFC switch
20. VCO circuit
21. VCO circuit
22. AFC output
23. Supply voltage
24. Intercarrier output
25. AF output - AM sound
26. Offset compensation
27. SIF 2 input (symmetrical)
28. SIF 2 input (symmetrical)
S-24C08A
General description:
The S-24C08A is a series of 2-wire , low power 8Kbit EEPROM with a wide operating range. It is organized as 1K-word
X 8-bit. It is capable of page write and sequential read.
Features:
n Power consumption
- standby : 1.0 uA Max. (Vcc = 5.5 V)
- Operating : 0.8 mA Max. (Vcc = 5.5 V f=400kHz)
0.4 mA Max. (Vcc = 4.5 V f=100kHz)
n Operating voltage range
- Write : 2.5 V to 5.5 V
- Read : 1.8 V to 5.5 V
n Page write
- 16 bytes
n Sequential read capable
n Endurance : 100.000 cycles / word
n Data retention : 10 years
n Write Protection
n 8 K bit