Sharp 27F830 Service Manual download pdf (Page 11)

27F830

DISPLAY OF TEXT BOX

TEXT BOX

| A-B | / 2

SPEC INSPECTION:| A-B | / 2

5mm

Focus Adjustment

1. Receive a good local channel.

2. Adjust the FOCUS VR of the flyback transformer to

make the image as fine as possible.

C. C Display Position Adjustment

1. Receive the lion head pattern signal.

2. Select "EX2" to display the text box.

3. Adjust the "EX2" bus data to let the text box displayed

in the center.

Vertical-Size and Linearity Adjustments

1. Receive a good local channel.

(SCREEN FORMAT 4:3)

2. Enter the service mode and select the service

adjustment "D03" for V-size.

3. Adjust the "D03" bus data to get the proper V-size.

4. For V-linearity adjustment, select data bus "D05" and

adjust to get the proper vertical linearity.

(SCREEN FORMAT 16:9)

5. Input data of "D22" to mines 38 step from "D03” data.

(V-SIZE)

6. Input data of "D24" same as "D05" data. (V-LIN)

Note: Aging for 10 min before adjustment. After the

adjustment of V-center and V-size, re-

adjustment for this V-line.

Vertical Phase Adjustment

(SCREEN FORMAT 4:3)

1. Enter the service mode and input data of "00h" on

"D01".

2. Adjust "D18" data value so that picture is centered.

(SCREEN FORMAT 16:9)

3. Input data of "00h" on "D20".

4. Input data of "D34" same as "D18" data.

Horizontal Position Adjustment

1. Receive a good local channel.

(SCREEN FORMAT 4:3)

2. Enter the service mode and select the service

adjustment "D02".

3. Adjust "D02" data value so that picture is centered.

(SCREEN FORMAT 16:9)

4. Input data of "D21" same as "D02" data.

Horizontal-Size Adjustment

1. Receive a good local channel.

(SCREEN FORMAT 4:3)

2. Enter the service mode and select the service

adjustment "D04" for H-size.

3. Adjust the "D04" bus data to get the proper H-size.

(SCREEN FORMAT 16:9)

4. Input data of "D23" same as "D04" data.

EW-Parabola

1. Receive a good local channel.

(SCREEN FORMAT 4:3)

2. Enter the service mode and select the service

adjustment "D07" for EW parabola.

3. Adjust the "D07" bus data to get the proper vertical

straight line for both left and right side.

(SCREEN FORMAT 16:9)

4. Input data of "D26" to mines 21 step from "D07" data.

EW-Trapezium

1. Receive a good local channel.

(SCREEN FORMAT 4:3)

2. Enter the service mode and select the service

adjustment "D08" for EW-Trapezium.

3. Adjust the "D08" bus data to get the best position

display.

(SCREEN FORMAT 16:9)

4. Input data of "D27" same as "D08" data.

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Sharp 27F830 Service Manual Page 11

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