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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.
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This schema available for me in good condition. I would highly recommend.
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Thanks for this "hard to find" service manual.
I apreciate the good quality of scanning and the pages scanned in A3 format.
Diagnostic Software, Trouble Shooting and Test Instructions 5.5
5.5.1
DVD 723-743
5.
EN 27
Basic Engine
Version Number In the basic engine tests, the version number of the Basic Engine will be shown first, as the following example: Figure 5-25 By pressing OPEN/CLOSE the user confirms that the disc motor is running. Pressing STOP indicates the disc motor does not work. Pressing PLAY proceeds to the next test, after a reset of the disc motor (nucleus BeDiscMotorOff). If the user presses PLAY before pressing OPEN/CLOSE or STOP, the result of this test will be TRUE (disc motor is running). 5.5.5 Focus Test (Visual Test) The fourth Basic Engine test tests the focussing. First focussing is turned on by calling nucleus BeFocusOn. The display will look as follows:
CL 16532162_043.eps 080102
CL 16532162_040.eps 080102
Figure 5-22 By pressing the PLAY key, the Basic Engine tests are started. 5.5.2 Tray Test First, the tray is tested. The purpose of this test is also to give the user the opportunity to put a disc in the tray of the DVD player. Some tests on the Basic Engine require that a disc (e.g. DVD MPTD test disc) is present in the player. At the end of the Basic Engine tests this tray test will be repeated solely to enable the user to remove the disc in the tray. The local display will look as follows:
CL 16532162_044.eps 080102
Figure 5-26 By pressing OPEN/CLOSE the user confirms that the focussing was succesful. Pressing STOP indicates a focussing failure. Pressing PLAY proceeds to the next test after a reset of the focussing (nucleus BeFocusOff). If PLAY is pressed before OPEN/CLOSE or STOP, the result of this test will be TRUE (focus successful). 5.5.6 Radial Test (Visual & Listening Test) The fifth Basic Engine test tests the radial functionality (nucleus BeRadialOn). The local display looks as follows:
CL 16532162_041.eps 080102
Figure 5-23 By pressing OPEN/CLOSE the user can toggle the position of the tray. Note that this test will not contribute to the test result of the Basic Engine. Pressing PLAY will proceed to the next test. At this point, the tray will be closed automatically by the software if it was open. 5.5.3 Sledge Test (Visual Test) The second Basic Engine test tests the sledge. The user can move the sledge as many times as desired by using OPEN/ CLOSE (nucleus BeSledgeOut) and STOP (nucleus BeSledgeIn). Pressing PLAY on the local keyboard proceeds to the next test. Note that this test will not contribute to the test result of the Basic Engine. The local display will look as follows during the sledge test:
CL 16532162_045.eps 080102
Figure 5-27 By pressing OPEN/CLOSE the user confirms that the radial function works.Pressing STOP indicates the function does not work. Pressing PLAY proceeds to the next test, after a reset of the radial (nucleus BeRadialOff). If the user presses PLAY before pressing OPEN/CLOSE or STOP, the result of this test will be TRUE (radial successful). 5.5.7 Jump Test (Listening Test) The sixth and last Basic Engine test tests the jumping by calling nuclei BeGroovesIn, BeGroovesMid and BeGroovesOut. During this test, the local display looks as follows:
CL 165321625_042.eps 080102
Figure 5-24 5.5.4 Disc Motor Test (Visual Test) The third Basic Engine test tests the disc motor (nucleus BeDiscMotorOn). The local display looks as follows:
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