Circuit Adjustments; Electrical Adjustments - Sony KDL-20B4050 Service Manual

Flat panel color tv
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3-1. Electrical Adjustments

Service adjustments to this model can be performed using the
supplied remote commander RM-ED009.
How to enter into the Service Mode
1.
Turn on the power to the TV set and enter into the stand-by
mode.
2.
Press the following sequence of buttons on the remote
commander.
i+
5
(ON SCREEN
(DIGIT 5)
DISPLAY)
'TT—' will appear in the upper right corner of the screen.
Other status information will also be displayed (See 3-3 page
17).
3.
Press 'MENU' on the remote commander to obtain the
following menu on the screen.
BACKLIGHT
HDMI
SOUND
IF ADJUST
PANEL TEMP
ERROR MENU
SE2 v6.29 Nov07
FACTORY DATA: 11111111
SERIAL NUMBER: 0001000013
WORKING TIME: 38.28
4.
Move to the corresponding adjustment item using the
up or down arrow buttons on the Remote Commander.
5.
Press the right arrow button to enter into the required menu
item.
6.
Press the 'Menu' button on the Remote Commander to quit
the Service Mode when all adjustments have been completed.
Note :
After carrying out the service adjustments, to prevent the
customer accessing the 'Service Menu' switch the TV set
OFF and then ON again.
SECTION 3 CIRCUIT ADJUSTMENTS
+
I/
+
TV
(VOLUME +)
(TV)
- 14 -
BACKLIGHT
BACKLIGHT
(0, 255)
U BACKLIGHT
(0, 10)
BL SETUDEN
(0, 255)
BL BOTTOM
(0, 255)
ECO MODE
(0, 1)
APL MAX
(0, 255)
DIMMER MIN
(-128, +127)
APL FACTOR
(0, 255)
OSD CONTR MIN
(0, 255)
DIMMER
(0, 255)
APL MIN
(0, 255)
HDMI
VAI2
(0, 255)
VAI3
(0, 255)
Vper MSB
(0, 255)
Vper LSB
(0, 255)
Hper MSB
(0, 255)
HS Width MSB
(0, 255)
STM LSB
(0, 255)
Ri (MSB)
(0, 255)
Ri (LSB)
(0, 255)
Aksv_0
(0, 255)
Aksv_1
(0, 255)
Aksv_2
(0, 255)
Aksv_3
(0, 255)
Aksv_4
(0, 255)
An_0
(0, 255)
An_1
(0, 255)
An_2
(0, 255)
An_3
(0, 255)
An_4
(0, 255)
An_5
(0, 255)
An_6
(0, 255)
An_7
(0, 255)
Pj
(0, 255)
Ainfo
(0, 255)
Flags
(0, 255)
SE2
RM-ED009
235
10
38
92
1
140
-32
0
40
186
103
0
0
3
31
0
0
176
218
101
0
0
0
0
0
0
0
0
0
0
0
0
0
202
0
6

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