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I have this hi-fi system for a long time and I need to repair some things. Founding this manual will be very helpfull :)
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It is pretty good. The schematics were covered all components, the manual also provide the parts list . It's useful for the trouble shooting.
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Very fast service, best quality of the service manual and the schematics
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This service manual of the old video cassette recorder VT-LC50EM is very good readable even the tiniest numbers (i.e. IC-pins). The circuits are very clear. Many details of the schematic are very good described but in GERMAN language. Many schematic details - but complete at all. Common background information of several details are enclosed and physical knowledge of the TFT liquid crystal display for example. The manual lacks PCB drawings. If you understand german I would recommend this manual for you.
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Hi, this is a very clear manual, nice copy, not quite up to the standard of the very best available but better than many others. I think the price was especially fair for a hard to find manual and I would certainly use this manual seller again. Recommended.
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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