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.
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.
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.
Nice pdf file of the manual sent promptly. Thanks.
Text excerpt from page 22 (click to view)
Is the voltage output at IC541 pin "53" 5V or 0V? NO Is the wiring for IC541 (90) ~ (100) correct? NO YES NO YES YES Is 5V present at IC501 pin "20"? YES Check the vicinity of IC541. Is 6V or 3V present at IC501 "10" and "11"? NO Check IC501. Check the feed motor connection wiring. NO Check CD 9V and 5V.
Is 4V present at both sides of the feed motor? YES Check the feed motor.
When the lens is moving: NO Check the circuits in the vicinity of IC501 pins "15" ~ "18". YES YES Check the pickup and its connections.
Does the S-search waveform appear at IC501 pins "6" and "7"?
Is the disk rotated? YES YES Does the RF signal appear at TP1? YES Is the RF waveform at TP1 distorted? YES Proceed to the Tracking section NO Check the circuits in the vicinity of IC521 "16" the pickup Check the spindle motor and its wiring. Check the vicinity of IC501. NO Is 4V present at IC501 pins "8" and "9" ? NO Is 4V present at IC541 pin "55" ? YES NO Check IC521 and IC541.
When the disc is rotated at first: YES Approx. 1.2 V Is the tracking error signal output at IC521 "12"? YES Check IC541. Check the circuit in the vicinity of IC521 pins "2" ~ "12". YES Check the pickup and its connections.