5 stars on this manual since it is the complete version, not the half manual you find free for download all over the web. Good job.
Text excerpt from page 50 (click to view)
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 Â± 0.02Vp-p
2-5-1. ACE Head Adjustment Refer to the âVHS mechanical adjustment manual 11). 2-5-2. E-E Output Level Check Mode Signal Measurement point Measuring instrument Specified value
[Check Method] 1) Check that the playback level satisfies the specified value.
[Check Method] 1) Input signal of 400Hz and â7.5dBs to the CN540 pin 5 (2). 2) Check that the audio output level is â7.5 Â± 3dBs. 2-5-3. Overall Output Level and Distortion Factor Check Mode Self-record playback Signal Measurement point Measuring instrument Specified value 400Hz, â7.5dBs : IC540 pin 5 (2) IC540 pin 3 (1) Audio level meter and Distortion meter Playback Level: â6.3 Â± 3dBs Distortion: 4.0% or less ( ) : R-ch
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 @Â§ Digital voltmeter CT500 A=2.4 Â± 2.5Vdc
[Check Method] 1) Adjust CT500 until DC output level at IC 500 pin @Â§ (F. C) satifies the specification.
A 0V 1H
[Check Method] 1) Input signal of 400Hz and â7.5dBs to the audio input. 2) Record signal. 3) Playback the recorded portion. 4) Check that the output level is â6.3 Â± 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) â 45.5dBs or less ( ) : R-ch
Fig. 7-2-10 2-5. AUDIO SYSTEM ADJUSTMENT â¢ 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 600â¦ Attenuator VTR 47kâ¦ Audio level meter or distortion meter
[Check Method] 1) Record. 2) Playback recorded portion. 3) Check that noise level is â 45.5dBs or less.
Fig. 7-2-10. â¢ Adjust in the SP mode if there is no special indications. â¢ Perform the adjustment setting the switch on the following positions. â¢ 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.