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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.
2. Adjustment Procedure (1) How to activate adjustment mode Turn ON the power (set 1.30V batteries terminal) while shorting TEST of the main circuit board. Once adjustment mode is activated, LCD will all light up and EL backlight will be turned ON. Then it displays �Manufacture MODE�.
(2) Using the multimeter, measure the DC voltage between VDD-GND of the test point. Check that the voltage between VDD-GND is more than 2.3V. If it has not reached 2.3V, short the VO ADJ. of the test point with the solder. (3) EEPROM Initialization Press the �DISPLAY� key. �EP INT OK� appears on the display. Press �PLAY/STOP� key to display �IDLE�.
(4) PIT disc (TEST DISC: TGYS1 or TDYS-1) Press �F-SKIP� and �B-SKIP� keys to shift the pick-up towards the centre. Insert the disc and press �PLAY/STOP� key. (Make sure the top panel is upward) LCD of the remote controller will be displayed �AUTO ADJ H� first, then �COMPLETE�. Press �PLAY/STOP� key again to display �IDLE�. * If it displayed �Failed� during adjustment, it means that some abnormalities are detected and the operation is terminated. (5) GRV disc (SONY MDW-74) Insert the disc and press �PLAY� key. (Check the facing direction of the set) LCD of the remote controller will be displayed �AUTO ADJ L� first, then �COMPLETE�. Press �PLAY/STOP� key again to display �IDLE�. * If it displayed �Failed� during adjustment, it means that some abnormalities are detected and the operation is terminated. (6) Checking RF Level and Error Rate TEST DISC: Insert TGYS1 or TDYS-1. Press ��� key, display �032c 00e� and playback. Make sure if the error rate is below �50e�. Check the RF waveform (TP3) with an oscilloscope and it is within the 1.0±0.2V p-p. Press �PLAY/STOP� key to display �IDLE�. Press �+� key of the remote controller. Display �600c 00e� and playback. Make sure if the error rate is below �60e�.
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