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This document is just what I was looking for, it´s very useful, it contains adjustment procedures for the final stage of the power amp and also
has a complete wiring diagram and description of the main semiconductors used in the design.
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Dear Sirs,
Thank you for the fast support, the manual does provide all necessary information to repair the radio. All schematics are in a good quality for reading.
The manual fits 100% to my requirements as a technican.
Kind regards Thomas
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the big video recorder format s-vhs many features delicate in loading system of the cassette. Such machines are no longer manufactured, it would be too expensive.
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THIS MANUAL IS VERY GOOD AND VERY CLEAR
PLEASE NOTE IT DOES NOT CONTAIN THE SETUP INFORMATION TO ALIGHN THE GEARS IN THE CD MECH IT DOES SHOW ALL THE PARTS AND THEIR LOCATIONS .
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Complete service and operation manual. All schematics are there, all circuit boards AND add-on boards. Including exploded views ,component names and specifications. Also electrical and mechanical adjustment procedures are in this manual. This manual also covers the more advanced BR-S811E unit. Scan quality is fair and usable.
2-4-6. Playback Level Check (MA-286 Board) Mode Playback Signal Alignment Measurement point Measuring instrument Specified value Alignment tape : SP mode color bar portion Video LINE OUT terminal Oscilloscope A=1.00 ± 0.02Vp-p
2-5-1. ACE Head Adjustment Refer to the �VHS mechanical adjustment manual 11). 2-5-2. E-E Output Level Check Mode Signal Measurement point Measuring instrument Specified value
� (9-973-623-
E-E 400Hz, �7.5dBs : IC540 pin 5 (2) CJ540 L/R Audio level meter �7.5 ± 2dBs ( ) : R-ch
[Check Method] 1) Check that the playback level satisfies the specified value.
A
[Check Method] 1) Input signal of 400Hz and �7.5dBs to the CN540 pin 5 (2). 2) Check that the audio output level is �7.5 ± 3dBs. 2-5-3. Overall Output Level and Distortion Factor Check Mode Self-record playback Signal Measurement point Measuring instrument Specified value 400Hz, �7.5dBs : IC540 pin 5 (2) IC540 pin 3 (1) Audio level meter and Distortion meter Playback Level: �6.3 ± 3dBs Distortion: 4.0% or less ( ) : R-ch
H
Fig. 7-2-9. 2-4-7. VCO Frequency Adjustment (MA-286 Board) Mode Signal Measurement point Measuring instrument Adjustment element Specified value Playback Alignment tape : SP mode color bar portion IC500 pin @§ Digital voltmeter CT500 A=2.4 ± 2.5Vdc
[Check Method] 1) Adjust CT500 until DC output level at IC 500 pin @§ (F. C) satifies the specification.
A 0V 1H
[Check Method] 1) Input signal of 400Hz and �7.5dBs to the audio input. 2) Record signal. 3) Playback the recorded portion. 4) Check that the output level is �6.3 ± 3dBs. 5) Check that the distortion factor is 4.0% or less. 2-5-4. Overall Noise Level Check Mode Signal Measurement point Measuring instrument Specified value Self-record playback No signal (Insert a shorting plug into the Audio LINE IN terminal) IC540 pin 3 (1) Audio level meter (IHF-A weighing filter is used) � 45.5dBs or less ( ) : R-ch
Fig. 7-2-10 2-5. AUDIO SYSTEM ADJUSTMENT � For the adjustment of the audio system, perform in the SP mode if there is no special notes. Use the alignment tape. [Connecting Instruments]
(CN540) Audio line OUTPUT L/R (CN540) Audio line INPUT L/R Audio oscillator 600� Attenuator VTR 47k� Audio level meter or distortion meter
[Check Method] 1) Record. 2) Playback recorded portion. 3) Check that noise level is � 45.5dBs or less.
Fig. 7-2-10. � Adjust in the SP mode if there is no special indications. � Perform the adjustment setting the switch on the following positions. � CHANNEL switch .................................................. LINE 1 [Adjustment Method] 1. ACE head adjustment.....Refer to the VHS mechanical adjustment manual . 2. E-E output level check 3. Overall Output level and distortion factor check 4. Overall noise level check.
7-5
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