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SHARP 28JS74E
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SHARP 28JS74E Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 21 (click to view)
28JS-74E
Vertical Bow Adjust the Vertical Bow so that the picture is centred. The effect of this adjustment is shown in figure 11. • 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 Amplitude Adjust the Vertical Amplitude so that 8% over-scan is achieved. The effect of this adjustment is shown in figure 12. • 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. S Correction Adjust the S Correction so that the picture symmetrical between the top, centre and bottom. The effect of this adjustment is shown in figure 13. • 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 14. • 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 Colour Adjustments The following adjustments should only be carried out when the CRT or IC801 are replaced. G2, Cut Off and Gain Adjustments 1. Follow the procedure below to set the G2 1.1 Tune the set to the output of a signal generator (cross hatch pattern). 1.2 In the user menu, set contrast to 80/100 and brightness to 40/100. 1.3 Connect the oscilloscope to the TP1801 and adjust G2 to read 135V on the sensor pulse as in the drawing:
135 V

Figure 11

Figure 12

Figure 13

CH1 gnd

10

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