Daewoo DTL-2950K Service Manual

Also see for DTL-2950: Manual instruction Instruction manual

CP-650 Service ManualDTV R&D Europe 214.1.4 FEATURESAnalogue Video Processing (all versions)· Multi-standard vision IF circuit with alignment-free PLL demodulator· Internal (switchable) time-constant for the IF-AGC circuit· Switchable group delay correction and sound trap (with switchable centre frequency) for thedemodulated CVBS signal· DVB/VSB IF circuit for preprocessing of digital TV signals.· Video switch with 3 external CVBS inputs and a CVBS output. All CVBS inputs can be used asY-input for Y/C signals. However, only 2 Y/C sources can be selected because the circuit has 2chroma inputs. It is possible to add an additional CVBS(Y)/C input (CVBS/YX and CX) when theYUV interface and the RGB/YPRPB input are not needed.· Automatic Y/C signal detector· Adaptive digital (4H/2H) PAL/NTSC comb filter for optimum separation of the luminance and thechrominance signal.· Integrated luminance delay line with adjustable delay time· Picture improvement features with peaking (with switchable centre frequency, depeaking,variable positive/negative peak ratio, variable pre-/overshoot ratio and video dependent coring),dynamic skin tone control, gamma control and blue- and black stretching. All features areavailable for CVBS, Y/C and RGB/YPBPR signals.· Switchable DC transfer ratio for the luminance signal· Only one reference (24.576 MHz) crystal required for the TCG m-Controller, digital soundprocessor, Teletext and the colour decoder· Multi-standard colour decoder with automatic search system and various “forced mode”possibilities· Internal base-band delay line· Indication of the Signal-to-Noise ratio of the incoming CVBS signal· Linear RGB/YPBPR input with fast insertion.· YUV interface. When this feature is not required some pins can be used as additionalRGB/YPBPR input. It is also possible to use these pins for additional CVBS (or Y/C) input(CVBS/YX and CX).· Tint control for external RGB/YPBPR signals· Scan Velocity Modulation output. The SVM circuit is active for all the incoming CVBS, Y/C andRGB/YPBPR signals. The SVM function can also be used during the display of teletext pages.· RGB control circuit with ‘Continuous Cathode Calibration’, white point and black level off-setadjustment so that the colour temperature of the dark and the light parts of the screen can bechosen independently.· Contrast reduction possibility during mixed-mode of OSD and Text signals· Adjustable ‘wide blanking’ of the RGB outputs· Horizontal synchronization with two control loops and alignment-free horizontal oscillator· Vertical count-down circuit· Vertical driver optimized for DC-coupled vertical output stages· Horizontal and vertical geometry processing with horizontal parallelogram and bow correctionand horizontal and vertical zoom· Low-power start-up of the horizontal drive circuitAnalogue video processing (stereo versions)· The low-pass filtered ‘mixed down’ I signal is available via a single ended or balanced outputstage.Analogue video processing (mono versions)· The low-pass filtered ‘mixed down’ I signal is available via a single ended output stageDigital Video Processing (some versions)· Double Window mode applications. It is possible to display a video and a text window or 2 text