Daewoo DUX-21U7DT, Руководство по обслуживанию

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CP-530 Service Manual
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Separate Second Sound IF output or FM demodulator output without de-emphasis available,
which can be used as input for an external BTSC decoder or as input for external sound
band-pass filter for second language processing.
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Separate SSIF input available as input for the FM-PLL demodulator to demodulate FM-radio
with an IF frequency of 10.7 MHz, or as input from an external sound band-pass filter for
second language processing.
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AM demodulator without extra reference circuit
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The mono intercarrier sound circuit has a selective FM-PLL demodulator which can be
switched to the different FM sound frequencies (4.5/5.5/6.0/6.5 MHz). The quality of this
system is such that the external band-pass filters can be omitted.
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The FM-PLL demodulator can be set to centre frequencies of 4.72/5.74 MHz so that a
second sound channel can be demodulated. In such an application it is necessary that an
external bandpass filter is inserted.
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Audio switch circuit with 3 stereo inputs (1 stereo input can also be switched into two mono
sound inputs), a stereo output for SCART/CINCH with the possibility to serve as front/monitor
audio output and a stereo output (with volume and tone-control), for audio power amplifiers.
The third stereo input is only available via the combined C2/C3/C4/AUDIOIN5R pin for the
right channel and via the combined CVBS4/Y4/AUDIOIN5L pin or INSSW3/AUDIOIN5L pin,
for the left channel.
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Video switch with 3 external CVBS inputs. All CVBS inputs can be used as Y-input for Y/C
signals. However, only 1 Y/C source can be selected because the circuit has 1 chroma input.
CVBS3/Y3 input available in combination with the G/Y-3 input pin.
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1 CVBS output, this output can be used as monitor video output or as front-end video output
or as independent selectable video output.
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Automatic Y/C signal detector.
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Integrated luminance delay line with adjustable delay time.
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Only one reference (24.576 MHz) crystal required for the m-Controller, Teletext- andthe color
decoder
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Multi-standard color decoder with automatic search system and various “forced mode”
possibilities
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Internal base-band delay line.
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Indication of the Signal-to-Noise ratio of the incoming CVBS signal
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Linear RGB/YPBPR input with fast insertion.
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Scan Velocity Modulation output. The SVM circuit is active for all the incoming CVBS,Y/C
and RGB/YPBPR signals. The SVM output is combined with the black current input of the
black current stabilisation circuit. By means of a small application adaptation both functions
can be operational in parallel. 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 are available for CVBS, Y/C and RGB/YPBPR signals
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The effect of the various features can de demonstrated by means of a ‘split screen’ mode in
which the features are activated in one half of the picture and switched off in the other half
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Switchable DC transfer ratio for the luminance signal
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Tint control for external RGB/YPBPR signals
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Contrast reduction possibility during mixed-mode of OSD and Text signals. Option to make