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.
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.
Regards
Limey Alex
Text excerpt from page 18 (click to view)
4-8 Trouble Shooting Chart Microphone not working
No voice from Microphone
GO YES
Check point: the Q503 on power board Observe: check the collector terminal voltage is over+0v7
Solution: replace the transistor
NO
Check point: Q503 on power board Observe: check the collector
YES Solution: Replace Q503
terminal is short circuit to ground
NO NO
Solution: check the +5V supply Circuit replaces any defected components
Check the +5V is presented
YES
Check point: Microphone input Observe: check if the any signal presenting at pin7 of CON601 by
YES
Solution: replace U601 on echo board if no signal output from pin 15
NO NO
Check point: VA+ and VA- on microphone board Observe: heck if the supply
Solution: check the connector between echo board and microphone
voltage is +/-10V
YES
Solution: replace the U401 on microphone board
