Sharp LC-20S4US Operation Manual de Serviço descarregar pdf (Página 14)

LC-20S4U-S

5. Take the following procedure when IC2009 (EEPROM) has been initialized or

IC2001 (microprocessor) replaced.

5-1. Connect pins (81) and (82) of IC2001 (microprocessor) to GND, and turn on the power.

5-2. Make sure "20" (inches) is selected for the screen size.

5-3. Make sure the model number "A627B" is selected.

(Onscreen display of adjustment process menu page 1)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

MOD E L 6A2

INCH S IZE

ERROR NO R ESE T

PUB L I C MOD E

–

CH I P

EXT CONTROL

6. Adjustments

6-1. Common bias adjustment

1) Select the "COM BIAS" mode on adjustment process menu page 2. Press the CURSOR RIGHT/LEFT keys

to generate the built-in signal.

2) Using the "cursor RIGHT/LEFT" keys, readjust the setting so that flickering gets to minimum.

3) To quit the built-in signal pattern, press the "cursor UP/DOWN" keys. The adjustment process mode screen

reappears.

6-2. TAMP adjustment

1) Feed the 100% white raster signal through the antenna input.

2) See if the "YDATA" reading on adjustment process menu page 2 is within the range in the table below. If not,

select the "NTSC TAMP" item on the same page. Press the "cursor RIGHT/LEFT" keys to scroll down the

item. Using the "cursor RIGHT/LEFT" keys again, readjust the "YDATA" reading to within the range shown

below.

Then reduce 24 from the "NTSC TAMP" setting and enter this value for "PAL-M TAMP" and "PAL-N TAMP".

3) Finally press the "cursor UP/DOWN" keys to return to the adjustment process mode screen.

Reference

(Onscreen display of adjustment process menu page 1)

Model numbe LC-20S4U-S

Setting (NTSC) 155-158

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

COM B I A S

TAMP L

YDA T A

TAMP H

NTSC TAMP

PAL

–

TMAMP

PAL

–

TNAMP

Y data

(white 100%)

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 83 84

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