ELECTRICAL ADJUSTMENTS
D-1
1. ADJUSTMENT PROCEDURE
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 for a heat sink,
apply the 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 damages to the
IC and Transistor.)
2. BASIC ADJUSTMENTS
Prepare the following measurement tools for electrical
adjustments.
1. Oscilloscope
2. Digital Voltmeter
3. Multi-sound Generator
4. Pattern Generator
On-Screen Display Adjustment
1. In the condition of NO indication on the screen.
Press the VOL. DOWN button on the set and the Channel
button (9) on the remote control for more than 2 second to
appear the adjustment mode on the screen as shown in
Fig. 1-1.
Fig. 1-1
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. 1-2.
Press the MENU button on the remote control to end the
adjustments.
To display the adjustment screen for AV, CS and HD-
MI mode, press the TV/VIDEO button on the remote
control to set to the AV, CS and HD-MI mode. Press
the VOL.DOWN button on the set and the channel (9)
on the remote control for more than 2 seconds.
TV
00 OSD H
2-2: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1.
2.
3.
4.
5.
6.
7.
Place the set with Aging Test for more than 10 minutes.
Receive the gray scale pattern from the Pattern Generator.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (24) on the remote control to
select “R.BIAS”.
Press the CH. UP/DOWN button on the remote control to
select the “R.BIAS”, “G.BIAS”, “B.BIAS”, “R/G.DRV”, “B/
R.DRV”, “R.BIAS(C)”, “G.BIAS(C)”, “B.BIAS(C)”, “R/
G.DRV(C)”, “B/R.DRV(C)”, “R.BIAS(W)”, “G.BIAS(W)”,
“B.BIAS(W)”, “R/G.DRV(W)” or “B/R.DRV(W)”.
Adjust the VOL. UP/DOWN button on the remote control
to whiten the R.BIAS(C), G.BIAS(C), B.BIAS(C), R/
G.DRV(C), B/R.DRV(C), R.BIAS(W), G.BIAS(W),
B.BIAS(W), R/G.DRV(W) and B/R.DRV(W)”at each step
tone sections equally.
Perform the above adjustments 5 and 6 until the white
color is looked like a white.
2-1: CUT OFF
1.
2.
3.
4.
5.
Place the set with Aging Test for more than 15 minutes.
Set condition is AV MODE without signal.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "CUT OFF".
Adjust the Screen Volume until a dim raster is obtained.
Fig. 1-2
FUNCTION
OSD H
CUT OFF
H.POSI
V.POSI
H. SIZE
V. SIZE
V. LIN
V-EHT
H-EHT
V-BLK P
V-BLK S
V.CENT
V.LIMIT
V.CORR
V.S.CORR
EW PARA
TRAPEZIUM
COR.TOP
COR.BTM
S.CORR
NO.
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
NO.
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
FUNCTION
CORNER
C.PARA
C.SAW
V.SYMM
R.BIAS
G.BIAS
B.BIAS
R/G.DRV
B/R.DRV
R.BIAS(C)
G.BIAS(C)
B.BIAS(C)
R/G.DRV(C)
B/R.DRV(C)
R.BIAS(W)
G.BIAS(W)
B.BIAS(W)
R/G.DRV(W)
B/R.DRV(W)
R-Y GAIN
NO.
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
FUNCTION
R-Y PHASE
G-Y GAIN
G-Y PHASE
BRI.CENT
BRI.MAX
BRI.MIN
CONT.CENT
CONT.MAX
CONT.MIN
COL.CENT
COL.MAX
COL.MIN
SUB CONT
TINT
SHARP.CENT
SHARP.MAX
SHARP.MIN
TILT.CENT
TEST STEREO
TEST AUDIO
THEATER WIDEA I
1
