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.
Text excerpt from page 38 (click to view)
10.Push the DISP button twice to erase the screen.
1-3. Partial Adjustments
In this chapter, the adjustments required relatively frequently are selected and associated items to be checked previously or to be adjusted before or after the adjustments are given in the flowchart below. Be sure to perform the adjustments following to the flowchart. Items shown within the frame: Confirm and adjust if the specification is out of its range.
Enlargement
This adjustment is always required.
1-3-1. Carrier Balance Adjustment
START
SA01: ADJ
1-2-2. R - Y Carrier Balance Adjustment
A
1-2-12. Preset Adjustment 1. Select <FILE A> with the FILE button. Disable color bar pattern or menu display by pushing the DISP button if necessary. 2. Push the MENU DOWN button and DATA DOWN button simultaneously for more than 1 second. 3. The preset operation completes and �PRESET OK� appears on the display. 4. Select <FILE B> with the FILE button. 5. 6. 7. 8. Perform the same steps as 2 ~ 4. Select <FILE C> with the FILE button. Perform the same steps as 2 ~ 4. Select <FILE A> with the FILE button.
1-2-3. B - Y Carrier Balance Adjustment
SA01: 1-2-12. Preset Adjustment NORM
1-2-13. Setting at Shipping
END
1-2-13. Setting at Shipping POWER (FRONT) : OFF KEY LOCK (REAR) : OFF