LG DI-28Z12, Service Manual, Page: 4 / 32

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Table 2 : Deflection initial data
Table 1/2 : Corresponding buttons for each adjustment
:
Audio Data Adjustment
NOTE : If you press "3" button on the remote controller in SVC
Mode then you can find On Screen Display as follow
Table 3.
* Never change these data, these are important reference data
for TV.
Table 3 : Audio initial data
:
Screen Voltage Adjustment
1) Turn the TV set to receive digital pattern. (Under the
condition of ARC Mode 16:9 (Wide Mode))
2) Press PSM button on remote controller. (Standard picture)
3) Connect the prove of oscilloscope to the RK (Red Cathod of
CPT Board).
4) Adjust Screen Volume of FBT so that the waveform is the
same as below Fig.3.
:
Focus Adjustment
NOTE : This adjustment should be performed after warming up
for 10 minutes.
[Set condition of the 16:9 (Wide Mode)]
1) Tune the TV set to reveive digital pattern.
2) Adjust the under Focus Volume for the best vertical Focus on
the center of the screen.
3) Adjust the upper Focus Volume for the best horizontal Focus
on the center of the screen.
Table 4 : CH preset Data
NOTE : These adjustments are possible with serviceable
remote controller installed SVC button.
If you don't have serviceable remote controller,
simultaneously press OK buttons on local control
and on remote controller then TV is changed from
normal mode to SVC mode.
Item
SP loud
HP vol
SC vol
SC pres
FM pres
NC pres
Range of Change
0~127
0~127
0~127
0~127
0~127
0~127
Initial Data
000
000
030
059
019
042
Adjustment
SPK loudness
SCART Vol
SC prescale
FM prescale
NC prescale
AD
1
2
3
4
5
Pattern
PHILIPS
FUBK
RED
C/HATCH
PHILIPS
Signal Function & Check
NICAM Stereo
Deflection Adjustment
ITC
NICAM, TXT
VHF
Ch.
PI-41
PI-11
C-36
PI-63
PI-05
Freq.
631~25
231~25
691~25
807~25
183~25
Test Point : RK (Red Cathod of CPT Board)
Adjust : Screen Control of FBT
Test Point : Observe display
Adjust : Focus control of FBT
Horizontal
FlyBack Time
Black level
White level
GND for dc
1H-LINE
160Vp-p
Fig. 3 : The waveform of RK(Red Cathode) of CPT Board
150Vp-p
HS
EW
EP
EC
ET
VL
VH
SC
VS
Item
50Hz DATA 60Hz DATA
16:9
18
45
10
20
28
35
18
26
35
ZOOM 1/2
18
45
10
20
16
35
18
26
35
4:3
18
32
10
20
16
35
21
26
35
16:9
26
44
10
20
25
35
20
22
35
ZOOM 1/2
26
44
10
20
16
35
12
22
35
4:3
26
31
10
20
16
35
20
22
35