ELECTRICAL ADJUSTMENTS
D3-2
2-3: RF AGC
1.
2.
3.
4.
Receive the VHF HIGH (63dB).
Connect the digital voltmeter between the pin 5 of
CP351 and the pin 1 (GND) of CP351.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (02) on the remote control to
select "RF AGC DELAY".
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.9
±
0.05V.
(TV SECTION)
2-4: CONSTANT VOLTAGE
1.
2.
3.
4.
Connect the digital voltmeter to the R520.
Set condition is AV MODE without signal.
Using the remote control, set the brightness and contrast
to normal position.
Adjust the VR502 until the digital voltmeter is 135
±
0.5V.
2-8: HORIZONTAL PHASE
1.
2.
3.
4.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (05) on the remote control to
select "H PHASE".
Press the VOL. UP/DOWN button on the remote
control until the SHIFT quantity of the OVER SCAN on
right and left becomes minimum.
1.
2.
3.
4.
5.
6.
Adjust the unit to the following settings.
R CUT OFF=128, G CUT OFF=128, B CUT OFF=128,
BRIGHTNESS=128, CONTRAST=100
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. 1-1 and
press the channel button (01) on the remote control to
select "CUT OFF".
Adjust the Screen Volume until a dim raster is obtained.
2-5: CUT OFF
2-6: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1.
2.
3.
4.
5.
6.
7.
8.
Place the set with Aging Test for more than 15 minutes.
Receive the color bar pattern.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (10) on the remote control to
select "R CUT OFF".
Using the VOL. UP/DOWN button on the remote control,
adjust the R.BIAS.
Press the CH. UP/DOWN button on the remote control to
select the "R.DRIVE", "B.DRIVE", "G CUT OFF" or "B
CUT OFF".
Using the VOL. UP/DOWN button on the remote control,
adjust the R.DRIVE, B.DRIVE, G CUT OFF or B CUT
OFF.
Perform the above adjustments 6 and 7 until the white
color is looked like a white.
2-7: FOCUS
1.
2.
3.
4.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
2-9: VERTICAL SHIFT
1.
2.
3.
4.
5.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (07) on the remote control to
select "V SHIFT".
Check if the step No. V. SHIFT is "3".
Adjust the VR401 until the horizontal line becomes fit to
the notch of the shadow mask.
2-10: VERTICAL SIZE
1.
2.
3.
4.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (06) on the remote control to
select "V SIZE".
Press the VOL. UP/DOWN button on the remote
control until the SHIFT quantity of the OVER SCAN on
upside and downside becomes minimum.
2-11: SUB BRIGHTNESS
1.
2.
3.
4.
5.
6.
Receive the monoscope pattern. (RF Input)
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (13) on the remote control to
select "BRIGHTNESS".
Press the VOL. UP/DOWN button on the remote
control until the white 10% is starting to be visible
Receive the monoscope pattern. (Audio Video Input)
Press the INPUT SELECT button on the remote control
to set to the AV mode. Then perform the above
adjustments 2~4.
2-12: SUB CONTRAST
1.
2.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (14) on the remote control to
select "CONTRAST".
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "100"
Press the INPUT SELECT button on the remote control
to set to the AV mode. Then perform the above
adjustments 1~2.
