Adjustment - LG RT-29FB70RB Service Manual

1. Safety Precautions
1. It is safe to adjust after using insulating transformer between
the power supply line and chassis input to prevent the risk of
electric shock and protect the instrument.
2. Never disconnect leads while the TV receiver is on.
3. Don't short any portion of circuits while power is on.
4. The adjustment must be done by the correct appliances.
5. Unless otherwise noted, set the line voltage to
50Hz.
6. The adjustment of TVshould be performed after warming up
for 15 minutes.
2. Test Equipment required
1. RF signal generator (with pattern generator)
2. DC Power Supply
3. Multimeter (volt meter)
4. Oscilloscope
5. Color analyzer
3.DVCO Adjustment
1) This is for adjustment of VCT38XX,crystal oscillator
frequency after
pattern.(PAL:EU05CH,NTSC:13CH)
2) When entering adjustment mode by pressing IN-START
button,DVCO adjustment is operating automatically.
(T/X doesn't operating occassionally during DVCO

adjustment.)

4. Focus Adjustment
4-1. Preparation for Adjustment
Tune the TV set to receive a digital pattern.
4-2. Adjustment Method
1) Single Focus CPT
Adjust the upper Focus volume of FBT for the best focus of
horizontal line A,vertical line B.
2) Double Focus CPT
1) Adjust the lower Focus volume of FBT for the best focus of
vertical line B.
2) Adjust the upper Focus volume of FBT for the best focus of
area A.
3) Repeat above step 1) and 2) for the best overall focus.
A
ADJUSTMENT INSTRUCTIONS
230Vac!10%,
receiving a company
Fig. 1
b
5. Screen Voltage & White Balance Adjustment
5-1. Adjustment of screen manually
(Using ADJ.Remote Control)
1) Receive the PAL or SECAM(NTSC) signal into RF mode
regardless of channel.
2) If you press the "ADJ"button in LINE SVC mode(IN-START
button),the LINE SVC mode changes to screen adjustment
mode.
3) Turn the Sreen Volume of FBT to change luminance of
White signal center as shown below.(Deviation ! 1FL)
4) Press the EXIT button (Like TV/AV) to exit SVC mode.
CPT & INCH
29" FLAT
25" FLAT
29" NORMAL
25" NORMAL
28" NORMAL
5-2. Adjustment of white balance manually(LIne-SVC 1)
Digital
1) Tune the TV set to receive an 100% white pattern.
2) Adjust LOW LIght status of CUT R,CUT B at CUT G:50.
3) Adjust HIGH LIght status of WDR R,WDR B at WDR G:380.
4) Repeat above step 2) and 3) for the best condition each
status of High Light and Low Light.
White Balance Color analyzer
Color Temperature
White Balance Initial Data
CUR R
CUR G
CUR B
WDR R
WDR G
WDR B
NOTE : When adjusting white balance automatically,connect the
B
adjustment JIG in SVC mode.(When pressing IN-
START,MUTE button on remote control for adjustment
orderly,it changes to SVC mode and screen displays
SVC.)
- 8 -
Luminance(Manual)
6!1FL
8!1FL
5!1FL
6!1FL
8!1FL
EU
Menu
X
288
Y
295
9000
Menu Range
0 ~ 511
0 ~ 511
0 ~ 511
0 ~ 511
0 ~ 511
0 ~ 511
Note
Single Focus
N-EU
268
273
o K 13000 o K
DATA
50
50
50
380
380
380