Sanyo PLV-55WR1Z Service Manual page 65

v v
TV video level adjustment V video eve l ad
Equ Equipment men Oscilloscope O
Input mode TV mode
Input signal Color bar pattern
1. Adjust the amplitude "
tuner board.
Test Point Adjustment value
1.0
(+) TP-V
(–) TP-G2
(a)
b
TV RF AGC 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.
VR201
3. Adjust on the tuner board until the snow
noise just disappears.
n
Video signal center 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
1 TPV1G
2 TPV1B
3 TPV1R
4 4 4 TPV2G T
5 5 TPV2B TPV
6 TPV2R
ustm ment
illo scop
a VR202
" by using on the
±0.1Vdc
Adjustment value
6.5
±0.1Vdc
6.5
±0.1Vdc
6.5
±0.1Vdc
7.5 7.5
± ±0.1Vdc 0.1V dc
7.5 7.5
± ±0.1Vdc 0.1Vd c
7 5 7.5
±0.1Vdc c
m
PC black Level adjustment C bla ack L eve
Equipment ment Osc 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
10 TPPANELG
11 TPPANELB
12 TPPANELR
black level
black level
, , , , ,
P Pedestal adjustment d t l dj d
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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Electrical Adjustments
l ad ustm ent
sc ope
Adjustment value
10.0
±0.1Vdc
10.0
±0.1Vdc
10.0
±0.1Vdc
(a)
t t