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There are currently no product reviews.
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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...
SECTION 4 ELECTRICAL BLOCK CHECKING
Note :
1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given. 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10M impedance. 4. Clean the object lens using an applicator with neutral detergent when the signal level is low than specified value with the following checks. S Curve Check
oscilloscope BD board TP (FE) TP (VC)
Note: Clear RF signal waveform means that the shape � � can be clearly distinguished at the center of the waveform.
RF signal waveform VOLT/DIV : 200mV TIME/DIV : 500ns level : 1.2 +0.25 Vp-p
�0.20
E-F Balance Check
oscilloscope BD board TP (TE) TP (VC)
Procedure : 1. Connect oscilloscope to test point TP (FE) on BD board. 2. Connect between test point TP (FEI) and TP (VC) by lead wire. 3. Turn Power switch on. 4. Put disc (YEDS-18) in and turn Power switch on again and actuate the focus search. (actuate the focus search when disc table is moving in and out.) 5. Check if the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 3±1 Vpp.
S-curve waveform symmetry
Procedure : 1. Connect test point TP1 (ADJ) to ground with a lead wire on MAIN board. 2. Connect oscilloscpe to test point TP (TE) on BD board. 3. Turned Power switch on. 4. Put disc (YEDS-18) in to play the number five track. 5. Press the �3� button. (The tracking servo and the sledding servo are turned OFF.) 6. Check the level B of the oscilliscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following : A/B x 100 = less than ± 22%
A within 3 ± 1 Vp-p B
Traverse waveform Center of the waveform B 0V A (DC voltage)
6. After check, remove the lead wire connected in step 2. Note : � Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7. � Take sweep time as long as possible and light up the brightness to obtain best waveform. RF Level Check
level : 1.3 ± 0.6 Vp-p
7. Press the �8� button. (The tracking servo and sledding servo are turned ON.) Confirm the C (DC voltage) is almost equal to the A (DC voltage) is step 6.
oscilloscope Traverse waveform
BD board TP (RF) TP (VC)
Procedure : 1. 2. 3. 4. Connect oscilloscope to test point TP (RF) on BD board. Turned Power switch on. Put disc (YEDS-18) in to play the number five track. Confirm that oscilloscope waveform is clear and check if RF signal level is correct or not.
0V Tracking servo Sledding servo OFF Tracking servo Sledding servo ON
C (DC voltage)
8. Disconnect the lead wire of TP (ADJ) connected in step 1.
�9�
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