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BUSH 2067 NTX General Information Also Covers Bush 2027 T Goodmans GTV 211 PT 9601 Chassis X-Ray Radiation Precaution 1. Excessive high voltage can be produce potentially hazardous X-RAY radiation. To avoid such hazard, the high voltage must not be above the specified limit. The nominal value of the high voltage of this receiver is 25KV at zero beam current (minimum brightness) under 220V AC power source. The high voltage must not under any circumstance, exceed 30KV. It is recommended the reading of the high voltage be recorded as a part of the service record. It is important to use an accurate and reliable high voltage meter. 2. The primary source of X-RAY radiation in this TV receiver is the picture tube. For continued X-RAY radiation protection, the replacement tube must be exactly the same type tube as specified in the part list. medium level - Adjust color, contrast, brightness to minimum by RC - Adjust G2 - Apply white pattern, settle in the probe of color analyzer to screen - Increase brightness until geting Y=10 nits - Adjust x=270 - 276 nits y=270 - 276 nits via "VR201, VR203, VR205" - Increase brightness and contrast until Y=90 100 nits - Adjust x, y to same values via "VR202 and VR204" - Check white balance at high and low contrast level. Again make adjustment if it's necessary. IC Data, Pin Functions and Voltages Video Processing Unit With TDA8362 Video and time base is based on the TDA 8362 Multistandard TV Processor( Pal Decoder),TDA 4665 Baseband Delay Line and TDA8395 Secam Decoder. The Features of this Concept: · Multistandard vision IF circuit (positive and negative modulation) · Multistandard FM sound demodulator (4.5 MHz to 6.5 MHz) · External Video and Audio Switches · Integrated chrominance traps and baseband filters · Integrated luminance delay line · RGB control circuit with linear RGB inputs · Horizontal synchronization with two loops and alignment-free horizontal oscillator without external components. · Vertical count-down circuit (50-60 Hz) and vertical preamplifier · Low dissipation · Only one adjustment (vision IF demodulator) PINNING PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 1 Audio deemphasis and +1- mod.switch IF-demodulator tuned circuit IF-demodulator tuned circuit Video identification output Sound IF plus volume control External audio input IF video output Decoupling digital supply Ground Positive supply (8V) Ground Decoupling filter tuning Internal CVBS input Peaking input External CVBS input Chroma + A/V switch input Brightness control input B-output G-output R-output RGB-insertion and blanking R-input for insertion G-input for insertion B-input for insertion Contrast control input Saturation control input Hue control input (or chroma out) B-Y input signal R-Y input signal R-Y output signal B-Y output signal 4.43MHz output for TDA8395 Loop filter burst phase detector 3.58 MHz X-tal connection 4.43MHz