Sharp 29fl90, Service Manual

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10
29FL90
Focus Adjustment
1. Receive a good local channel.
2. Adjust the VR-1 (upper knob) 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.
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.
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
1. Enter the service mode and select the service
adjustment "D01".
2. Adjust "D01" data value so that picture is centered.
Horizontal Position Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "D02".
3. Adjust "D02" data value so that picture is centered.
Caption Position Adjustment (Horizontal)
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "EX2".
3. A black text box appears on the screen. (see Figure
B. below)
4. Adjust "EX2" data value so that text box is positioned
in the center of the screen.
Horizontal-Size Adjustment
1. Receive a good local channel.
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.
EW-Parabola
1. Receive a good local channel.
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.
EW-Trapezium
1. Receive a good local channel.
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.
EW-Corner
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "D09" for EW-Corner.
3. Adjust the "D09" bus data to get the best linearity for
4 corner points.
Other Adjustments
1. Enter the service mode.
2. Adjust the following data values as listed below.
Figure B.
SERVICE ADJUST DATA(Hex)
POSITION ITEM 29FL90
OP1 OPTION1 C5
OP2 OPTION2 1A
OP3 OPTION3 0F
DISPLAY OF TEXT BOX
TEXT BOX
A
B
| A-B | / 2
SPEC INSPECTION:| A-B | / 2 <
= 5mm