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This manual is accurate and of high quality. It is only volume 2 of the service manual. This is schematic, parts lists, and exploded mechanical drawings. The theory of operation and the diss-assembly instructions are in volume 1. The unit can be tricky to dis-assemble portions of so the volume 1 manual can be important. The product description of the manual is accurate but it does not say anything about volume 1 and the image of the front page does clearly say Volume 2.
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Wellll again thank you very much fast and effective. Clear and well done for such an old TV!!!!
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It has all the information you will need to fix it. The main circuit diagram is only A4 but being a PDF, you can print it to any size - I did it on two sheets of A3 and it didnt lose any detail - just made it readable when pinned up above the bench. I've found the fault, just need to buy some obscure bits to get it going again!
I cant fault the process, I paid for the manual in the morning and it was ready to download by lunch time.
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Very good copy in a 54 pages PDF archive. This is my sixth purchase here. :)
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Another excellent buy! File too clear and explanatory.
DV-05, DV-S5
7.4 CIRCUIT DESCRIPTION
7.4.1 VIDEO SIGNAL PROCESSING BLOCK
7 CXD1854Q Block
The major processing functions of the CXD1854Q block are: (1) Field-correlative cyclic digital noise reduction (2) Block noise reduction (3) Horizontal contour compression These functions are performed for the Y signal and not performed for the C signal.
(1) Field Correlative Cyclic Digital Noise Reduction
For eight-bit digital video data input to the CXD1854Q, noise reduction is achieved through the subtraction of data of one field from the corresponding data one field before. This data is stored in a buffer zone where the subtraction process takes place and this buffer zone is a 512Kbit DRAM. The noise signal detected as a result is sent to a non-linear circuit. If the difference is larger than a specific value, it is regarded as �a change in picture,� and no canceling calculation is made.
(2) Block Noise Reduction
The Horizontal Block Noise components in the field which are generated through DCT for the MPEG encoding are rejected. They are detected through comparing input data between blocks. The noise signal detected as a result is sent to a non-linear circuit. If the difference is larger than a specific value, it is regarded as �a change in picture,� and no canceling calculation is made.
(3) Horizontal Contour Compensations
This is performed by emphasizing components in the region of 2.3MHz.
7 MC44724A Block
The digital video encoder MC44724A changes the digital component signals to analog video signals (Y signal, C signal, Cr signal and Cb signal). It is added the digital video encoder for the digital processing of CXD1854Q.
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