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El producto satisface las necesidades del servicio t
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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...
Power supply circuit
1) Power supply circuit for CPU, GATE ARRAY and RAMs.
When the main batteries are set, the voltage (9V) is applied to the terminal VDD1 of CPU (LSI1), GATE ARRAY (LSI2) and RAM (LSI4). When IC2 receives the voltage, it provides 4V to the GND lines from the terminal OUT (Pin No.1).
2)
Main switch
The CPU (LSI1) detects the informations of the Main switch by the terminal SW (Pin No.36) from the SWO signal of the GATE ARRAY (LSI2).
3)
How to turn the display ON.
When pressing "ON" key under the ON side of the Main switch , the CPU (LSI1) generates the signal to turn the display ON on the terminal V2ON (Pin No.45). This signal goes to the terminal VIN (Pin No.24) of the GATE ARRAY (LSI2), then the GATE ARRAY (LSI2) generates "L" level on the terminal VOB (Pin No.28). When the transistor 2SA1179 (Q2) receives "L" level, the transistor 2SC2812 (Q1) will be also turned ON. Then LCD drive voltage V1~V4 will be applied.
4)
How to detect the voltage for the main batteries.
When the voltage of the VDD lines becomes +6.6V±0.18V, the terminal OUT (Pin No.1) of the detector RH5V60BA (IC4) becomes "L" level, then this signal goes to the terminal INTO (Pin No.70) of the CPU (LSI1) and the terminal PDN (Pin No.35) of the GATE ARRAY (LSI2). The CPU detects the low battery condition, then the display turns OFF.
� 10 �
 $4.99 SF7900 CASIO
Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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