Teac 11AK33, Service Manual

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TDA6108:
The TDA6108 includes three video output amplifiers in a SIL 9 MP (Single In Line 9 pins Medium Power) package SOT111BE,
using high-voltage DMOS technology, and is intended to drive the three cathodes of a colour picture tube.
In contrast to previous types of DMOS video amplifiers, all external resistors (Rf, Ri and Ra) are integrated, so the gain is fixed
and it saves 9 resistors.
To obtain maximum performance, the amplifier should be used with black-current control and mounted on the CRT panel.
Features:
n Bandwith: 4.0 MHz typ at 100Vpp (Measured in appli,cation set-up, with Rfl=1K5 and Cl=Ctube+Cpcb=10pF)
n Slewrate: 950V/ms
n Fixed gain of 50 times
n No external components, only the well known supply decoupling
n Very simple application with a variety of colour decoders
n Black-current measurement output for automatic black current stabilization
n Only one supply voltage needed
n Internal protection against positive appearing CRT flash-over discharges
n Protection against ESD
n Internal reference voltage
n Thermal protection
n Controllable switch-off behaviour
n Very small PCB dimensions
n Very high replacement value
PINNING PIN VALUE
1. Inverting input 1 : 2Vpp
2. Inverting input 2 : 2Vpp
3. Inverting input 3 : 2Vpp
4. Ground
5. BSC-output : Max:7V
6. Supply voltage : 200VDC
7. Cathode output 3 : 20mA, 100Vpp
8. Cathode output 2 : 20mA, 100Vpp
9. Cathode output 1 : 20mA, 100Vpp
TDA 9181
General description:
The TDA TDA 9181 is an adaptive PAL/NTSC comb filter with two internal delay lines, filters, clock control, and input clamps.
Video standards PAL B, G, H, I, M and N NTSC M are supported. Two CVBS input signals can be selected by means of input switch.
In addition to the comb filter the circuit contains an output switch so that a selection can be made between the combed CVBS
signal and an external Y/C signal. The supply voltage is 5V.
Features:
n One-chip multistandard adaptive comb filter
n Cross luminance reduction
n Cross colour reduction
n No chroma trap, so sharper vertical luminance transients
n Analog discrete-time signal processing, so no quantization noise
n Anti aliasing and reconstruction filters are included
n Input switch selects between two Y/ CVBS inputs.
n Output switch selects between combed CVBS and an external Y-C source.
n Fsc as well as 2 x Fsc colour subcarrier signal may be applied
n Alignment free
n Few external components
n Low power
PINNING
1. Off time circuit
2. Primary current simulation
3. Regulation and zero Crossing input
4. Soft-Start and Regulation Capacitor
5. Opto Coupler Input
6. Fault Comparator 2
7. Synchronization Input
8. Not Connected
9. Reference Voltage and Current
10. Fault Comparator 1
11. Primary Voltage Check
12. Ground
13. Output
14. Supply Voltage