Screen Voltage Adjustment; Focus Adjustment; Deflection Adjustment - LG 30FZ1DC Service Manual

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6. Focus Adjustment

A
(1) Set Picture condition to "Normal".
Normal
ADJUSTMENT INSTRUCTIONS
CONTRAST : 100
BRIGHT : 60
TINT : 60
COLOR : 0
SHARPNESS : 60
(2) Set the Aspect ratio to Wide Mode.
(3) Receive a Cross Hatch Pattern, adjusting the FOCUS
Knob on the flyback transformer for the best focus in the
area designated "A" above.
[ Heat run over 15 minutes before adjustment.
7. CUT-OFF Adjustment

(Screen Voltage Adjustment)

7-1. Test equipment
Oscilloscope, 100:1 Probe
7-2. Adjustment
(1) Select EZ Adjust 3. CUT-OFF, by pressing the ADJ key on
the SVC Remote control.
When it enters to adjustment mode, the pattern from a
signal generator is being selected, it becomes with Normal
image 16:9 and the CUT-OFF DRIVE data setting 31.
(2) Connect the oscilloscope ground lead to GND on the CPT
board and the probe to the GK pin connector of the CPT
socket.
Using the SCREEN knob on the Flyback Transformer,
adjust the black level voltage to 175±2V.
(SCREEN voltage adjustment OSCILLOSCOPE, 100:1
PROBE, VOLTS/DIV : 0.5V/DIV SEC/DIV : 5us, The TRIGGER
MODE it puts in the TV-H)

8. Deflection Adjustment

8-1. Preliminary Steps
Select EZ Adjust 1. Raster, Cent, H/V Size by using the ADJ
key on the SVC Remote control.
In the adjustment mode a Digital Pattern signal signal is
displayed.
8-2. Raster V-Center(V.Center) Adjustment
Select 62. V-Postition in the adjustment mode and adjust it to
position the vertical center line in vertical center of the CPT.
- 12 -
175 ±2 V
CUT-OFF Adjustment

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