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The service manual is as described and received the link to the download sooner than expected. Great service, quality product. This site is a big help in the electronics repair business.
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Il service manual molto accurato. Rapidi nella risposta
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Quick site processing. A complete and very useful manual with all details. Thank you!
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Quick service response. A useful and very rare service manual with all details. I recomend this service.
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I ordered this manual sometime in the afternoon and I received it on my e-mail the same evening.
This is a fantastically good and properly scanned copy of the original manual. All pages are of the same scale and they overlap each other. It means that you can print the manual and easily make it as a convenient paper manual.
The content of the manual is fantastic. Alignment descriptions, PCB layouts and elementary diagrams are explicit and precise. I immediately found what I was looking for. Thanks to this manual and Owner-Manuals.com my amplifier is alive again. Many thanx indded!
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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