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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
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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.
1-3. Switching Regulator Replacement 1-4. Fuse/IC Link Replacement
1-3. Switching Regulator Replacement
w Unplug the power supply cord before replacing the switching regulator. n Do not disassemble the switching regulator. 1. Remove the top plate. (Refer to Section 1-1-1.) 2. Raise the wiring clip. 3. Disconnect the connector (CN1). (Refer to Section 11-2.) 4. Remove the two screws (B3x8). 5. Remove the screw (BVTP3x10). 6. Remove the four screws fixing the connectors. 7. Remove the three screws (PSW3x6), then remove the CPU-321/CPU-323 board. 8. Remove the five solders fixing the switching regulator. 9. Remove the switching regulator from the CPU-321/ CPU-323 board.
Switching regulator CPU-321 /CPU-323 board PSW 3x6 Wiring clip PSW 3x6
1-4. Fuse/IC Link Replacement
w A fuse and an IC link is critical parts to safe operation. Replace this component with SONY parts whose part numbers appear in this manual published by SONY. If not, this may cause a fire or electric shock. Be sure to use specified component in this manual. The BKS-R3216/R1617/R1618/R3219/R3220/R1621/ R3240A/R3242A/R3248A has a fuse and an IC link for circuit protection. A fuse and an IC link will blow when abnormality occurs and an overcurrent flows in this equipment. Be sure to replace an old fuse and an IC link with the specified fuse or IC link as shown below after removing the foreign substances that may cause the shorts.
Board CPU-321 CPU-323 IF-803 Ref. No. F1 (A-2) F1 (A-2) PS1 (C-2) PS1 (A-2) Part name H.B.C fuse 2A, 250V H.B.C fuse 2A, 250V IC link, Chip 2A IC link, Chip 0.52A Part No. !1-576-228-11 !1-576-228-11 !1-533-282-21 !1-533-539-11
NOTE: The character in parentheses ( ) indicate the address on board.
Washer
Connector screws BVTP 3x10 B 3x8
n On installing the switching regulator, install it in the reverse order of the removal steps 1 to 9.
1-6 (E)
BKS-R3216/R1617/R1618 BKS-R3219/R3220/R1621 BKS-R3240A/R3242A/R3248A
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