- 65 -
Electrical Adjustments
Equipment Oscilloscope
Input mode
TV
mode
Input signal
Color bar pattern
1. Adjust the amplitude "
a
" by using
VR202
on the
tuner board.
Test Point
Adjustment value
(+)
TP-V
1.0
±0.1Vdc
(–)
TP-G2
(a)
v
TV video level adjustment
Equipment NO
Input mode
TV
mode
Input signal
The clearest VHF station
1. Receive a TV signal with
TV
mode and tune the
receiver to the clearest (or strongest) VHF station in
your area.
2. Set the colour control to minimum.
3. Adjust
VR201
on the tuner board until the snow
noise just disappears.
b
TV RF AGC adjustment
Equipment Digital
voltmeter
Input mode
PC_2 [Analog RGB]
mode
Input signal
16-step gray scale computer signal
1. Enter the service mode.
2. Change data values for each test points to adjust the
video signal reference voltage (V1, V2).
Item no.
Test Point
Adjustment value
1
TPV1G
6.5
±0.1Vdc
2
TPV1B
6.5
±0.1Vdc
3
TPV1R
6.5
±0.1Vdc
4
TPV2G
7.5
±0.1Vdc
5
TPV2B
7.5
±0.1Vdc
6
TPV2R
7.5
±0.1Vdc
n
Video signal center adjustment
Equipment Oscilloscope
Input mode
PC_2 [Analog RGB]
mode
Input signal
16-step gray scale computer signal
1. Enter the service mode.
2. Change data value for each test points to adjust
amplitude “
a
” to be below value.
Item no.
Test Point
Adjustment value
10
TPPANELG
10.0
±0.1Vdc
11
TPPANELB
10.0
±0.1Vdc
12
TPPANELR
10.0
±0.1Vdc
(a)
black level
black level
m
PC black Level adjustment
Equipment Oscilloscope
Input signal
16-step gray scale signal
8-1
Input mode
PC_2 [Analog RGB]
mode
Input format
720p computer
signal
8-2
Input mode
VIDEO_1 [Video]
mode
Input format
NTSC composite
signal
8-3
Input mode
VIDEO_2 [Y,Pb/Cb,Pr/Cr]
mode
Input format
720p component
signal
8-4
Input mode
VIDEO_2 [Y,Pb/Cb,Pr/Cr]
mode
Input format
1080i component
signal
1. Enter the service mode.
2. Change data values for each test points to adjust the
pedestal level and black level to be the same level
in
each mode
.
Item no.
Test Point
19
TPPANELG
20
TPPANELB
21
TPPANELR
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Pedestal adjustment
4
5
4
T
TPV
7.5
±
7.5
±
7 5
0.1V
0.1Vd
dc
c
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