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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
6-2. ELECTRICAL ADJUSTMENT
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 by 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 (FE1) TP (VC)
Note: A 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 �0.20
Vp-p
Adjustment Location: BD board E-F Balance Check
oscilloscope BD board TP (TE) TP (VC)
Procedure : 1. Chuck the disc (YEDS-18) beforehand, and disconnect the power cord from the outlet. 2. Connect oscilloscope to test point TP (FE1) on BD board. 3. Connect test point TP1 (ADJ) on MAIN board to ground with lead wire. 4. The ADJ mode is set when the power cord is inserted into the outlet and power is supplied. 5. The fifth track is played automatically. 6. Press the CHECK button. 7. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 3±1 Vp-p.
S-curve waveform
symmetry
Procedure : 1. Chuck the disc (YEDS-18) beforehand, and disconnect the power cord from the outlet. 2. Connect oscilloscpe to test point TP (TE) on BD board. 3. Connect test point TP1 (ADJ) on MAIN board to ground with lead wire. 4. The ADJ mode is set when the power cord is inserted into the outlet and power is supplied. 5. The fifth track is played automatically. 6. Press the GROUP 3 button. (The tracking servo and the sledding servo are turned OFF.) 7. 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
8. Pressing the 1/u button stops the output of the waveform (s curve). 9. After check, remove the lead wire connected in step 3. 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. Adjustment Location: BD board
0V
A (DC voltage)
level : 1.3 ± 0.6 mVp-p
8. Press the GROUP 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 7.
Traverse waveform
RF Level Check
oscilloscope BD board TP (RF) TP (VC)
0V
C (DC voltage)
Procedure : 1. Connect oscilloscope to test point TP (RF) on BD board. 2. Turn Power switch on. 3. Put disc (YEDS-18) in to play the number five track. 4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.
Tracking servo Sledding servo OFF
Tracking servo Sledding servo ON
9. Disconnect the lead wire of TP1 (ADJ) connected in step 2. Adjustment Location: MAIN board
� 17 �
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