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This is a good quality scan of the Operation & Maintenance (Service) Manual for the PAL version of this high-band broadcast umatic, BVU-800P
All schematics and lineup procedures appear to be included in this one manual AFAICT.
The file size is just over 113 MB which gives an idea of the quality and number of pages.
All of the schematics, which contain some fairly small print, are easily readable when you zoom into the page.
John Thompson, Newcastle Upon Tyne, England.
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Good quality, all schematics of few of models. There is also short form of user manual and regulation manual.
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Perfect copy of the service manual. you can enlarge every page, and it comes up
with all details.
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It´s very very nice manual with all, what i need. Original in good quality. Very fast business. Very much thanks...
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Purchased the manual that I was looking for at a great price and could download it easily.. Great service experience and for future purchases I plan to use the site.
Thank you very much
B. Signal flow of the PAL colour in the record mode
Video input
(5.06±4.43) MHz
2
Video AGC
BPF
4.43MHz
ACC AMP
4.43MHz
MAIN CONV
IMHz LPF
O
5.06MHz 627KHz
To. PREAMP 2Head: Pin & of LA7411 4Head: Pin ) of LA7416
u
Killer
I
BLOCK 2. PAL COLOUR SIGNAL FLOW A recording composite video signal is fed to the AGC circuit from Pin 12 of IC301, and its output signal is passed through a BPF (Band Pass Filter) to eliminate the luminance components, and then only the colour signal is fed to the ACC (Auto Colour Controller) amplifier. The gain of the ACC amplifier is controlled by the DC voltage at Pin 41 of IC301. The signal from ACC AMP is fed to the Main Converter to transfer 4.43MHz to 627KHz. That is, the summation and substraction of the two input signal frequencies are obtained from this Main Converter. Here, the two input signal frequencies are 4.43MHz and 5.06MHz. The output frequencies from the Main Converter are approximately 627KHz and 9.49MHz. The output from the Main Converter is fed to the killer circuit through the LPF. The LPF is used to eliminate unwanted frequencies (ie: 9.49MHz). The Killer detector gives a reliable operation thanks to the application of both systems i.e. synchronized detection (APC Killer) and the Peak detection (ACC Killer) in the record mode. The signal is obtained from Pin 38 of IC301 as the recording colour signal. The output signal from Pin 38 of IC301 is fed to the PREAMP IC (2 Head: Pin 7 of LA7411, 4 Head: Pin 10 of LA7416). C. Signal flow of the luminance in the playback mode The playback Y-FM from the PREAMP (approximately 60dB amplification) is fed to the PB EQ circuit to perform frequencylimiting and phase compensation. The output signal from the PB EQ circuit is input to Pin 1 of IC301 and then this signal is passed through the FM-AGC so that the signal level is kept constant. The output signal is fed to a Double Limiter. The Double Limiter's function is as follows: As the high frequency components of the playback Y-FM signal are deteriorated due to the characteristics of the TapeHead system, Y-FM signal (black spike) effect may be seen in the playback picture, and the Double Limiter is used to compensate for this. The signal from the Double Limiter is fed to an FM Demodulator. This demodulated video signal is passed through the LPF and the emphasized high frequency component from the Main Emphasis is de-emphasized. The signal from the Main DEemphasis is fed to pin 4 of IC301.
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