ELECTRICAL ADJUSTMENTS
1. Synchro Scope
2. Digital Voltmeter
3. Color Bar Generator
Fig. 2-2
1. AGC AUTO
2. RF AGC DELAY
3. VIDEO LEVEL
4. FM LEVEL
5. OSD H
6. CUT OFF
7.
8. 0. RETURN
2-2: VCO
1.
2.
3.
Receive the color bar pattern.
Connect the digital voltmeter to TP202.
Adjust the L204 until the digital voltmeter is 3.5
±
0.05V.
D1-1
2. BASIC ADJUSTMENTS
On-Screen Display Adjustment
Unplug AC cord to set the clock to the nonclock setting
mode. And then set the volume to minimum.
Press both VOL. DOWN button on the set and the
Channel button (9) on the remote control for more than
1 second to appear the adjustment mode on the screen
as shown in Fig. 2-1.
NOTE
Use the Channel buttons (1-8) on the remote control to
select the options shown in Fig. 2-1.
Press the Channel button (0) on the remote control to
end the adjustments.
1. H/V
2. AKB
3. COLOR TEMP
4. PICTURE
5. OTHERS
6. TEST PATTERN
7.
8. (VOL TEST) 0. END
Fig. 2-1
2-1: RF AGC DELAY
1.
2.
3.
4.
5.
Receive monoscope pattern.
Connect the digital voltmeter to pin 5 of CP101.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (5) on the remote control to
select "OTHERS". The Fig. 2-2 appears on the display.
Press the channel button (2) on the remote control to
select "RF AGC RELAY".
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 1.4
±
0.05V.
2-3: CUT OFF
1.
2.
3.
4.
5.
6.
2-4: FOCUS
1.
2.
3.
4.
2-5: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustments.
1.
2.
3.
4.
5.
6
7.
8.
9.
Place the set wiht Aging Test for more than 10 minutes.
Receive the white 100% signal from the Pattern
Generator.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (2) on the remote control to
select "AKB". The Fig. 2-3 appears on the display.
Press the channel button (2) on the remote control to
select the "R.BIAS".
Using the VOL. UP/DOWN on the remote control, adjust
the R.BIAS.
Press the CH. UP/DOWN button on the remote control to
select the "G.BIAS", "B.BIAS", "R.DRIVE", or "B.DRIVE".
Using the VOL. UP/DOWN button on the remote control,
adjust the G.BIAS, B.BIAS, R.DRIVE or B.DRIVE.
Perform the above adjustments 7 and 8 until the white
color is looked like a white.
Place the set with Aging Test for more than 15 minutes.
Set condition is AV MODE without signal.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (5) on the remote control to
select "OTHERS". The Fig. 2-2 appears on the display.
Press the channel button (6) on the remote control to
select "CUT OFF".
Adjust the Screen Volume until a dim raster is obtained.
Using the remote control, set the brightness and
contrast to normal position.
Receive the monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
1. BEFORE MAKING ELECTRICAL
ADJUSTMENTS
•
•
•
•
Use an isolation transformer when performing any
service on this chassis.
Before removing the anode cap, discharge electricity
because it contains high voltage.
When removing a PCB or related component, after
unfastening or changing a wire, be sure to put the wire
back in its original position.
Inferior silicon grease can damage IC's and transistors.
When replacing IC's and transistors, use only specified
silicon grease (YG6260M).
Remove all old silicon before applying new silicon.
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
Prepare the following measurement tools for electrical
adjustments.
1.
2.
