Sharp LC-20AV7U Service Manual - Page 16

Sub-Brightness Adjustment - no power

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3. Sub-Brightness Adjustment Purpose: To get proper brightness. Symptom of Misadjustment: If Sub-Brightness is incorrect, proper brightness cannot be obtained by adjusting the Brightness Control. Adj. Point Input [MENU] button Ant. input, Any channel, SMPTE pattern, [RF/INPUT1]: CG-931 (KENWOOD), [INPUT2]: CG-931 (KENWOOD), w/SETUP 7.5IRE M. EQ. Spec. Pattern Generator See below Figure White A position B position Black C position 1. Enter the Service mode. Then input above signal. 2. [RF/INPUT1] Press [MENU] button on the service remote control unit and press [1] on the service remote control (selecting "BRT" mode). [INPUT2] Press [MENU] button on the service remote control unit and press [3] on the service remote control (selecting "D1-BRT" mode). 3. Make sure that contrast and brightness controls are set to initial position. 4. Confirm "C" position was beginning to bright. 5. If "C" position was beginning to bright, no need to adjust. 6. If "C" position is not available or to be highly brightness, then adjust IIC-BUS dada. [RF/INPUT1]: BRT [INPUT2]: D1-BRT 7. Turn the power off and on again. (Main power button on the TV unit.) 5-3 A7144EA

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5-3
A7144EA
3. Sub-Brightness Adjustment
Purpose:
To get proper brightness.
Symptom of Misadjustment:
If Sub-Brightness is
incorrect, proper brightness cannot be obtained by
adjusting the Brightness Control.
1.
Enter the Service mode. Then input above signal.
2.
[RF/INPUT1]
Press [MENU] button on the service remote
control unit and press [1] on the service remote
control (selecting “BRT” mode).
[INPUT2]
Press [MENU] button on the service remote
control unit and press [3] on the service remote
control (selecting “D1-BRT” mode).
3.
Make sure that contrast and brightness controls
are set to initial position.
4.
Confirm “C” position was beginning to bright.
5.
If “C” position was beginning to bright, no need to
adjust.
6.
If “C” position is not available or to be highly
brightness, then adjust IIC-BUS dada.
[RF/INPUT1]
: BRT
[INPUT2]
: D1-BRT
7.
Turn the power off and on again. (Main power
button on the TV unit.)
Adj. Point
Input
[MENU]
button
Ant. input, Any channel,
SMPTE pattern,
[RF/INPUT1]
: CG-931 (KENWOOD),
[INPUT2]
: CG-931 (KENWOOD),
w/SETUP 7.5IRE
M. EQ.
Spec.
Pattern
Generator
See below
Figure
White
Black
C position
B position
A position