Universum FT-81015, Service Manual

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8
Pinning:
1. Output (1)
2. +Vs
3. Output (2)
4. Mute / St-By
5. -Vs
6. Input (2)
7. Ground
8. Input (1)
VIDEO INPUT AND OUTPUT SOURCE SWITCHING
TEA6415C
Video switching is performed by the I2C controlled IC TEA6415C with a gain of 0dB. Inputs to the video switch are IF_CVBS,
three SCART video signals, front-AV video signal, SVHS luma signal, and one of SC1_R or SVHS_C. Outputs of the video
switch are three SCART video signals (SC1_OUT_V and SC3_OUT_V are the same), one video output for the PIP module,
Chroma signal (C), and luma (Y) or CVBS signal.
Features:
n 20 MHz Bandwith
n Cascadable with another TEA6415C (Internal address can be changed by pin 7 voltage)
n 8 inputs (CVBS, RGB, Mac, CHROMA, )
n 6 Outputs
n Possibility of MAC or chroma signal for each input by switching-off the clamp with an external resistor bridge
n Bus controlled
n 6.5dB gain between any input and output
n -55dB crosstaljk at 5MHz
n Fully ESD protected
Pinning:
1. Input : Max : 2Vpp, Input Current : 1mA, Max : 3mA
2. Data : Low level : -0.3V Max : 1.5V,
High level : 3.0V Max : Vcc+0.5V
3. Input : Max : 2Vpp, Input Current : 1mA, Max : 3mA
4. Clock : Low level : -0.3V Max : 1.5V,
High level : 3.0V Max : Vcc+0.5V
5. Input : Max : 2Vpp, Input Current : 1mA, Max : 3mA
6. Input : Max : 2Vpp, Input Current : 1mA, Max : 3mA
7. Prog
8. Input : Max : 2Vpp, Input Current : 1mA, Max : 3mA
9. Vcc : 12V
10. Input : Max : 2Vpp, Input Current : 1mA, Max : 3mA
11. Input : Max : 2Vpp, Input Current : 1mA, Max : 3mA
12. Ground
13. Output : 5.5Vpp, Min : 4.5Vpp
14. Output : 5.5Vpp, Min : 4.5Vpp
15. Output : 5.5Vpp, Min : 4.5Vpp
16. Output : 5.5Vpp, Min : 4.5Vpp
17. Output : 5.5Vpp, Min : 4.5Vpp
18. Output : 5.5Vpp, Min : 4.5Vpp
19. Ground
20. Input : Max : 2Vpp, Input Current : 1mA, Max : 3mA
VIDEO OUTPUT AMPLIFIER STAGE
TDA6111Q
The TDA6111Q is a video output amplifier with 16Mhz bandwidth. It has a high slew rate. Automatic black-current stabilisation
is possible by black-current measurement output. It has two cathode outputs: one for DC currents and one for transient
currents. A feedback output is separated from the cathode outputs. An internal protection exists against positive appearing
cathode-ray-tube flashover discharges with ESD protection.
Features:
n High bandwidth and slew rate
n Black-current measurement output for Automatic Black-current Stabilisation (ABS)
n Two cathode outputs; one for DC currents, and one for transient currents
n A feedback output separated from the cathode outputs
n Internal protection against positive appearing cathode-ray Tube (CRT) flashover discharges
n ESD protection
n Simple application with a variety of colour decoders
n Differential input with a designed maximum common mode input capacitance of 3pF, a maximum differential
mode input capacitance of 0.5 pF and a differential input voltage temperature drift of 50 uV/K
n Defined switch-off behaviour.