Daewoo DSJ-6000LN, Руководство по обслуживанию

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TUNER, and those data are converted to TUNER (IF) signal in the PLL inside the Tuner and
Tuner IC.
(1-3) The carrier of the selected broadcasting signal is converted to PIP frequency (P:
45.75MHz, S: 41.25MHz, C: 42.17MHz), and modulated to IF signal of TU. The
modulated IF signals are converted to Composite Video and SIF signal in the internal IF
Module, then are sent to each Video_Out Port(#16) and Audio_Out Port (#13).
(2) NTSC Video Signal Switching Circuit
Signal Processing of Video Signal Switching Circuit is as follows.
(2-1) In the case of NTSC ANT Input, the Composite Video Signal sent from Tuner
Video_Out Port (#16) is sent to TV Pin 41 of Video Switching IC CXA1855(U101) via
Tr Buffer(Q101), and 3 set of external Video Jack Input 1, 2, 3 are, respectively, sent to
Switching 1,2,3 Input Port of CXA1855.
(2-2) The 4 set of NTSC Video signal sent to CXA1855 is switched to the inside and is
outputted in the Video_Out 2 terminal. At this time, one of the Composite signal
coming from Vout Pin 23 and Yout2, Cout2 Pin (19, 21) is selected via Switching IC
MM1232(U104).
(2-3) The selected Composite or Y/C signal is sent to 3D Comb Filter IC uPD4082(U105) via
Filter, and is processed. This IC is three dimensional Y/C Separate IC, and has the
external AD Converter and 4M bit EDO Memory, and process Y/C separation and
YCNR (YC Noise Reduction) when Composite and Y/C signals are coming.
(2-4) The Y/C signal processed in D Module is routed to Video Board via TR Buffer (Q106,
Q107), respectively.
(2-5) In the case of Monitor Out, 3D Module Input Composite signal and 3D Module Output
Y/C signal are outputted via Buffer (Q102, U102, U103).
(3) DVD, HDTV, PC SIGNAL PROCESSING Circuit
Input of DVD, DTV, and PC signals are sent to A/V Board and Side Board Jacks, then sent to
Video Board directly.