32JF-77 (serv.man15) - Sharp TV Service Manual (repair manual). Page 10

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.

Note:
Oscilloscope should be adjusted for vertical TV field trigger and synchronized with video signal.

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.

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.

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.

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 15

Figure 12

Figure 13

Figure 14

CH1 gnd

Figure 16