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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
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Complete manual including mechanical part in good pdf quality. Shaded greys of the pcb due to pdf not perfect but usable.
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Nice pdf file of the manual sent promptly. Thanks.
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Complete MFG Service Manual at a good price FAST !
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6) RF level automatic adjustment (RFAGC)
This adjustment is performed in order to adjust variation of RF signal (RFO) level to fixed value and to realize reliable signal transmission. The adjustment is performed with changing amp gain between RFI and RFO. Adjustment steps (1) The microcomputer reads out output from RF level detect circuit inside servo LSI by a command. (2) The microcomputer calculates desired RFO level of amp gain volume from read value. (3) The microcomputer sends an appropriate command to servo LSI to reach to the gain volume of (2). This adjustment is performed at the following timing, � During set-up, only focus-close is finished � At the point of set-up completion (just before playing) � During playing, after recovering from out-of-focus 7) Adjustment of gain of preamp stage If there is lens dirt, or reflected light of a disc is notably small during CD-RW replaying, gain of entire RFAMP(FE, TE, RF amp) should be +6dB, +12dB according to the situation. Adjustment steps When reflected light of a disc is notably small during setup, the entire RFAMP should be +6dB, +12dB. In addition, when changing gain, perform again the set-up procedure from the start. When it is considered that "the entire gain of RFAMP is always played at +6dB", perform the set-up at +6dB in advance from the next time. See the figure below.
A
B
Entire RFAMP GAIN Playing with +12dB gain with CD-RW, etc. + 12dB
C
+ 6dB
D
Detecting that "lens is dirty" and playing with +6dB from the start TYP
+6dB play increases because of dirt of lens, etc. (Set-up starts with TYP gain.)
Fig.14 Conceptual diagram of gain of preamp stage
Time
E
F
CX-3168
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