Read Sharp LC-19D1EBK (serv.man4) Service Manual online
LC-19D1E/S-BK/WH
3 – 30
7. Video signal adjustment procedure
1. AD-Converter Level Adjustment
1) Preparation
* Prepare signal generator LEADER LT448.
2) 1080i input
a) The method of a 1080i 75% COLOUR BAR signal input
* Signal name: Select COLOUR BAR
Please use the 3rd of three kinds of COLOUR BAR button which is compatible with LT446. (Press a button 3 times.)
* Turn a rotary switch then select 02.
Preset value: 02: 1080i/59.94 (30sF) H: 33.72kHz V: 29.97Hz
* input 1080i input signal into the component input terminal (EXT3) of the set.
b) The method of adjustment
* Refer to 4th item of chapter 3 and go to adjustment process mode.
* In the adjustment process mode, “AUTO GAIN-OFFSET” in “DVP3 (M2-HD)” of DVP the rayer page 3 is selected and the setting is
turned “ON” with a right and left key.
3) 480i input
a) The method of a 480i 75% COLOUR BAR signal input
* Signal name: Select COLOUR BAR
Please use the 3rd of three kinds of COLOUR BAR button which is compatible with LT446. (Press a button 3 times.)
* Turn a rotary switch then select 15.
Preset value: 15: 480i/60 H: 15.73kHz V: 29.97Hz
* input 480i input signal into the component input terminal (EXT3) of the set.
b) The method of adjustment
* Refer to 4th item of chapter 3 and go to adjustment process mode.
* In the adjustment process mode, “AUTO GAIN-OFFSET” in “DVP4 (M2-SD)” of DVP the rayer page 4 is selected and the setting is
turned “ON” with a right and left key.
4) PC XGA Input
a) The method of a XGA 75% COLOUR BAR signal input (RGB)
* Signal name: Select COLOUR BAR, set to SATURATION 75%
Please use the signal which is changeable SATURATION in three kinds of COLOUR BAR button.
* Turn a rotary switch then select 28.
Preset value: 28: XGA H: 48.36kHz V: 60.00Hz
Make sure to turn off SYNC setting
* Input PC XGA input signal into the D-sub15 terminal (EXT5) of the set.
b) The method of adjustment
* Go to adjustment process mode with reference to the 4th item of chapter 3.
* In the adjustment process mode, “AUTO GAIN-OFFSET” in “DVP5 (M2-PC)” of DVP the rayer page 5 is selected and the setting is
turned “ON” with a right and left key.
5) SCART RGB input
a) PAL 75% color bar signal input
Name of the used device: FLUKE 54200
Signal name: COLOR BAR
* Long press the COLOR BAR key to select COL_75_0.
b) Set AUTO GAIN-OFFSET on page 27 (SCART) of the adjust process DVP-M2 hierarchy to RUN.
* During adjustment, the whole screen becomes greenish. This is normal.
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