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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
PIF/AFT/AGC � DIGITAL COMB FILTER Y LEVEL ADJUSTMENT
3. AFT T204 DC voltage at TP201 [ Pin (1) of IC201] 1. DIGITAL COMB FILTER Y LEVEL ADJUSTMENT: R5467
6V this is not available, any signal above the level 1.0 Vp-p ± 0.05Vp-p).
Receive E-12CH (PAL signal. If 1. Input the PAL bar (100% white colour bar) signal to AV-IN terminal with a 75 ohm termination (input
E-5CH band is acceptable. 2. Connect the oscilloscope to TP5462 (pin (7) of connector YA). � Field strength: 55~80 dBµV 3. Adjust R5467 so that the Y signal (100% white) at TP5462 be 2.0 ± 0.1Vp-p. Make sure frequency is almost the same as 3.3V of received channel (± 30 kHz). Note: Make sure that the signal is linearly amplified overall. (The 100% portion should be kept intact.)
2. Using the channel setting control, make a fre-
quency of 224.25 MHz appear on screen. <Reference> Note voltage level for adjustment with the E-12CH signal. (AFT off)(If any other channel than E-12CH is To be adjusted to 2.0 Vp-p at TP5462 received, make its frequency on screen.) * Make sure above value is available after the adjustment No. 5. (See Page 12.)
DOWN A B' B B'' C UP
3. Turn T204 coil clockwise first to have 6V readInput (YB) (2): 2.0 V ± 0.1 Vp-p
ing and then counterclockwise to get 0.2 readOutput (YA) (7): 2.0 V ± 0.1 Vp-p Fig. 3 ing. * Turn core counterclockwise for UP diWithin range, adjust this coil to reach the volt-
� SOUND ADJUSTMENT
B' B''). Point A and C are rejectable.
rection, and clockwise for the DOWN direcage below. tion. Adjust the T204 core to point B (between 4. Adjust T204 so that DC voltage at the pin (1) of IC201 be 3.3 ± 0.2 V. (See Fig. 3.)
2
1. SUB SOUND ADJUSTMENT (I C bus adjustment)
0.04/-0.06 Vp-p 2. Set the volume control to MAX. 3. Connect VTVM probe to the S1 connector. (Pin 1: L-ch, 2: GND, pin 3: R-ch)
TV Set 4. Adjust sub-sound data so that VTVM should read following voltage. For the left channel. Fig. 4. Oscilloscope
4. RF AGC CUT-IN ADJUSTMENT: R226 1. Feed following signal to the AV terminal. Signal: 1 kHz, 1.76 Vp-p (terminated with a 10k ohm impedance),
1. Receive the E-12CH (PAL colour bar) signal.
� Field strength: 57 ± 1 dBµV (75 ohms open) Adjustment error: 8.0 ± 0.1 Vrms
2. Connect the oscilloscope to P201, as shown in
P201 Notes:
7
0.1V 3. Turn R226 to have the highest voltage.
� Bias box: About 6.5V
4. Turn R226 slowly in the opposite direction until
voltage goes down 0.1V below the highest level.
5. Adjust the signal level to 63-67 dBµV and make
Bias box 6. Now adjust the signal level to 90-95 dBµV and
� Spatializer off � In the S-Normal mode � S-VOL control at MAX position * Use an 8 ohm dummy load.
sure there are no noise.
2. NOISE MUTE CHECKING make sure there is no chrominance modulation +
1. Receive E-12CH "PAL colour bar" signal. 2. Turn up volume control to maximum and make sure sound is heard from speakers. Then put the unit in the no-signal state. 3. Be sure that the sound mute is effective.
beat.
Note: If a 50 ohm field strength meter is used with-
Fig. 4 4. Finally turn down the volume control minimum.
out a 50/75 impedance converter, set the field strength 55 ± 1dBµV. Pay attention to a loss that would be cause with the converter.
5. VIDEO DETECTION LEVEL ADJUSTMENT: R224
1. Receive "B/G SYSTEM PAL COLOUR BAR" signal (100% white colour bar). Set the S system to B/G. 2. Adjust R224 so that video output at the AV OUT terminal be 1.0 ± 0.05 Vp-p with a 75 ohm termination.
SX80J7
7-1 7-2
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