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PDF Contains
Technical Data, Mechanical data, Detailed Circuit diagram with components value, PCB layout. Actual PCBs Print. Component List, Spare parts code list and Input output detail. It cover LBB1211, LBB1212, LBB1213, LBB1216, LBB1217.
It is the actual Service Manual for SQ10
28JF-76E
Vertical bow Adjust the Vertical bow so that the picture is centred. The effect of this adjustment is shown in Figure 12. � When the volume up button is pressed, the vertical bow changes to left. � When the volume down button is pressed, the vertical bow changes to right. � Press the stand-by button on the remote control to store. Vertical size Adjust the Vertical size so that 8% over-scan is achieved. The effect of this adjustment is shown in Figure 13. � When the volume up button is pressed, the vertical size of the picture increases. � When the volume down button is pressed, the vertical size of the picture decreases. � Press the stand-by button on the remote control to store. Vertical S-correction Adjust the Vertical S-correction so that the picture symmetrical between the top, centre and bottom. The effect of this adjustment is shown in Figure 14. � When the volume up button is pressed, the top and bottom scanning decreases and the centre scanning increases. � When the volume down button is pressed the top and bottom scanning increases and the centre scanning decreases. � Press the stand-by button on the remote control to store. Vertical Shift Adjust the Vertical Shift so that the picture is centred. The effect of this adjustment is shown in Figure 15. � When the volume up button is pressed, the picture moves up. � When the volume down button is pressed, the picture moves down. � Press the stand-by button on the remote control to store. Figure 14 Figure 13 Figure 12
Figure 15
G2 Adjustment
Follow the procedure below to set the G2: 1. Tune the set to the output of a signal generator (Cross-Hatch pattern). 2. In the user menu, set contrast to 80/100 and brightness to 40/100. 3. Connect the oscilloscope to the RED catode of cathode tube (pin 8 of CRT socket) and adjust G2 to read 150V on the sensor pulse as in Figure 16.
150 V
CH1 gnd
Note: Oscilloscope should be adjusted for vertical TV field trigger and synchronized with video signal.
Figure 16
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