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1.
BEFORE MAKING ELECTRICAL
ADJUSTMENTS
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
•
Use an isolation transformer when performing any service
on this chassis.
•
Before removing the anode cap, discharge electricity
because it contains high voltage.
•
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 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).
Prepare the following measurement tools for electrical
adjustments.
1. Oscilloscope
2. AC Voltmeter
3. Pattern Generator
4. Multi-Sound Signal Generator
On-Screen Display Adjustment
1.
Set the VOLUME to minimum.
2.
Press the VOL. DOWN button on the set and the Channel
button (9) on the remote control for more than 1 second
to appear the adjustment mode on the screen as shown
in Fig. 1-1.
Function
01 OSD
Step No.
3.
Use the Channel UP/DOWN button or Channel button (1-
0) on the remote control to select the options shown in
Fig. 1-2.
4.
Press the TV MENU button on the remote control to end
the adjustments.
5.
To display the adjustment screen for AV mode, press the
INPUT SELECT button on the remote control to set to the
AV mode. And, to display the adjustment screen for DVD
mode, press the TV/DVD button on the remote control to
set to the DVD mode. Press the VOL.DOWN button on
the set and the channel (9) on the remote control for
more than 1 second.
ELECTRICAL ADJUSTMENTS
TV
15
Fig. 1-1
NO.
FUNCTION
01
OSD
07
RCUT M
08
GCUT M
09
BCUT M
10
DRI1 M
11
DRI2 M
12
MD6 M
13
DTHON M
14
DRREF M
15
RCUT2 M
16
GCUT2 M
17
BCUT2 M
18
GAINR M
19
GAING M
20
GAINB M
21
RCUT C
22
GCUT C
23
BCUT C
24
DRI1 C
25
DRI2 C
26
MD6 C
27
DTHON C
28
DRREF C
29
RCUT2 C
30
GCUT2 C
31
BCUT2 C
32
GAINR C
33
GAING C
34
GAINB C
35
RCUT W
36
GCUT W
37
BCUT W
2. BASIC ADJUSTMENTS
2-1: CONTRAST MAX
1.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (53) on the remote control to
select "CONT MAX".
Press the VOL. UP/DOWN button on the remote control
2.
until the contrast step No. becomes "56".
3.
Receive a broadcast and check if the picture is normal.
4.
Press the INPUT SELECT button on the remote control
to set to the AV mode.
5.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (53) on the remote control to
select "CONT MAX".
6.
Press the VOL. UP/DOWN button on the remote control
until the contrast step No. becomes "56".
7.
Receive a broadcast and check if the picture is normal.
D-1
NO.
FUNCTION
38
DRI1 W
39
DRI2 W
40
MD6 W
41
DTHON W
42
DRREF W
43
RCUT2 W
44
GCUT2 W
45
BCUT2 W
46
GAINR W
47
GAING W
48
GAINB W
49
BRI CEN
50
BRI MAX
51
BRI MIN
52
CON CEN
53
CON MAX
54
CON MIN
55
COL CEN
56
COL MAX
57
COL MIN
58
TIN CEN
59
TIN MAX
60
TIN MIN
61
SHA CEN
62
SHA MAX
63
SHA MIN
64
DIM
65
CR GAIN
66
CB GAIN
67
CR OFFS
68
CB OFFS
Fig. 1-2
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