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Very good quality original datasheet!I like this amazing website!!!!!!
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Excellent just what I needed to replace the electrolytic caps and make this old gem a beauty again. Was as scan of the original photocopied service manual.
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It was helpful to get schematic with waveforms in important points and lot of service information. Manual is good quality, fast delivered. Of course it is hardcopy of paper one with all its disadvantages.
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I want to give you a real heads-up for your desire to enable such people as I to acquire the information I need to maintain the older types of equipment such as this Akai HXA351W. You do a swell job with all the processes you have to perform so I can have a legible, thus usable
document which does not send me crazy trying to figure out the blurry text of a bad copy.
Very well done, Thomas.
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This manual is very well presented and after printing out looks about as close to an original as I think you can get. The quality is second to none.
The content of the manual is comprehensive and I think it would be well suited to an audio repair professional which I'm not but I did find it very informative and helpful.
The cost of the manual is more than covered by the money I'll save when I change the keep memory battery now I have the relavant info.
Very pleased with my purchase and can recommend it wholeheartedly as I can other manuals I've downloaded from this site.
Regards
Limey Alex
2. AUDIO CONTROL HEAD TILT ADJUSTMENT
Purpose: To confirm that the tape runs smoothly. In particular, confirm that the tape properly picks up the Audio Signal at the upper part of the head and the Control Signal at the lower part of the head. Symptom of Misadjustment: If the tilt of the Audio Control Head is poorly adjusted, the tape will eventually be damaged. An intermittent Blue screen may be seen in Playback. 1. Play back a T120 cassette tape and check that the tape travels smoothly between the upper and lower guides of the P4 post. 2. If necessary, adjust Black Screw (B) clockwise until the tape begins to curl at the lower edge of the P4 post. Then adjust the screw counterclockwise until the curling is eliminated.
Tape Running Condition Audio Control Head in Tilted Condition Direction to turn for Correction
Black Screw (B) Black Screw (C)
Black Screw (A) Control Head Lower Edge of Tape 0.25mm
Lower Edge of Control Head Fig. M8
4. AUDIO CONTROL HEAD AZIMUTH ADJUSTMENT
Purpose: To adjust the position and height of the Audio Control Head so that it meets the tape tracks properly. Fig. M7 Symptom of Misadjustment: If the position of the Audio Control Head is not properly adjusted, the Audio S/N Ratio is poor. 1. Connect the oscilloscope to the TP4002 on the Main C.B.A. 2. Play back the 6kHz Monaural Audio portion of the alignment tape. 3. Adjust Black Screw (C) on the Audio Control Head base so that the output level is at maximum.
3. AUDIO CONTROL HEAD HEIGHT ADJUSTMENT
The height of the Audio Control Head replacement part is preset at the factory. Purpose: To be sure the tape runs properly along the Control Head. Symptom of Misadjustment: If the control signal is not properly picked up, Servo Operation cannot be achieved. A Blue screen will be seen in Playback. This confirmation is required when the Audio Control Head is replaced.
6KHz-Audio
Maximum
Fig. M9 1. Play back a T120 cassette tape and check that the lower edge of the tape runs approximately 0.25 mm above the lower edge of the Audio Control Head. 2. If necessary, adjust Black Screws (A) and (B) clockwise to lower the tape or counterclockwise to raise. 4. Confirm the height of the Audio Control Head is proper. If not, readjust Black Screws (A) and (B).
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