ELECTRICAL ADJUSTMENTS
1. ADJUSTMENT PROCEDURE
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
On-Screen Display Adjustment
1.
2.
Set the VOLUME to minimum.
Press the VOL. DOWN button on the set and the
channel button (9) on the remote control for more than
2 seconds to display adjustment mode on the screen as
shown in Fig. 2-1.
Fig. 2-1
3.
4.
5.
Use the Channel UP/DOWN button or Channel button
(0-9) on the remote control to select the options shown
in Fig. 2-2.
Press the MENU button on the remote control to end
the adjustments.
To display the adjustment screen for AV, HDMI and
COMPONENT mode, press the INPUT SELECT button
on the remote control to set to the AV, HDMI and
COMPONENT mode. Press the VOL.DOWN button on
the set and the channel (9) on the remote control for
more than 2 seconds.
•
•
•
Use an isolation transformer when performing any
service on this chassis.
When removing a PCB or related component, after
unfastening or changing a wire, be sure to put the wire
back in its original position.
When you exchange IC and Transistor with a heat sink,
apply silicon grease (YG6260M) on the contact section of
the heat sink. Before applying new silicon grease,
remove all the old silicon grease. (Old grease may cause
damage to the IC and Transistor).
2. BASIC ADJUSTMENTS
Prepare the following measurement tools for electrical
adjustments.
1. Pattern Generator
2-1: CONTRAST
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
Receive the monoscope pattern.(RF Input)
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (35) on the remote control to
select "CONTRAST CENTER".
Check if the step No. CONTRAST CENTER is "147".
Receive a broadcast and check if the picture is normal.
Press the INPUT SELECT button on the remote control
to set to the AV mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (35) on the remote control to
select "CONTRAST CENTER".
Check if the step No. CONTRAST CENTER is "147".
Receive a broadcast and check if the picture is normal.
Receive a Color Bar Pattern.
Press the INPUT SELECT button on the remote control
to set to the COMPONENT mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (35) on the remote control to
select "CONTRAST CENTER".
Check if the step No. CONTRAST CENTER is "147".
Receive a broadcast and check if the picture is normal.
Playback the DVD disc. (480i input)
Press the INPUT SELECT button on the remote control
to set to the HDMI mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (35) on the remote control to
select "CONTRAST CENTER".
Check if the step No. CONTRAST CENTER is "147".
Receive a broadcast and check if the picture is normal.
TV
01 H POSI OSD
AUTO
90
NO.
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
FUNCTION
H POSI OSD
V POSI OSD
R DRIVE (N)
R CUT OFF (N)
G DRIVE (N)
G CUT OFF (N)
B DRIVE (N)
B CUT OFF (N)
R DRIVE (C)
R CUT OFF (C)
G DRIVE (C)
G CUT OFF (C)
B DRIVE (C)
B CUT OFF (C)
R DRIVE (W)
R CUT OFF (W)
G DRIVE (W)
G CUT OFF (W)
B DRIVE (W)
B CUT OFF (W)
H POSI 50Hz
NO.
22
23
24
25
26
27
28
29
30
31
35
36
37
38
39
40
41
42
43
44
45
FUNCTION
H POSI 60Hz
V POSI 50Hz
V POSI 60Hz
BAK LIGHT CENT
BAK LIGHT MAX
BAK LIGHT MIN
BRIGHT CENT
BRIGHT MAX
BRIGHT MIN
TINT
CONTRAST CENTER
CONTRAST MAX
CONTRAST MIN
COLOR CENT
COLOR MAX
COLOR MIN
H POSI TEXT
V POSI TEXT
NT COLOR CENT
NT COLOR MAX
NT COLOR MIN
Fig. 2-2