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
CP602 and the pin 1 (GND) of CP602.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (02) on the remote control to
select "RF AGC".
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.5
±
0.05V.
(TV SECTION)
2-4: CONSTANT VOLTAGE
1.
2.
3.
4.
5.
6.
Input DC12V to DC Jack and turn the Power ON.
Connect the digital voltmeter to R544.
Set condition is AV MODE without signal.
Adjust the VR501 until the DC voltage is 134
±
0.5V.
Input AC120V to AC cord and remove the DC Jack
cord. Check if the Power is ON before doing the above
procedure.
Adjust the VR502 until the DC voltage 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.
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 "0".
Adjust the VR402 until the horizontal line becomes fit to
the notch of the shadow mask.
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,
R DRIVE=64, B DRIVE=64, 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
2-7: 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.
2-6: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1.
2.
3.
4.
5.
6.
7.
Place the set with Aging Test for more than 15 minutes.
Receive the gray scale pattern from the Pattern
Generator.
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".
Press the CH. UP/DOWN button on the remote control
to select the "R CUT OFF", "G CUT OFF", "B CUT
OFF", "R DRIVE" or "G DRIVE".
Adjust the VOL. UP/DOWN button on the remote control
to whiten the R CUT OFF, G CUT OFF, B CUT OFF, R
DRIVE, and G DRIVE at each step tone sections equally.
Perform the above adjustments 5 and 6 until the white
color is looked like a white.
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 10
±
2%.
2-11: VERTICAL LINEARITY
1.
2.
3.
NOTE: Adjust after performing adjustments in section 2-10.
After the adjustment of Vertical Linearity, reconfirm
the Vertical Shift and Vertical Size adjustments.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Adjust the VR401 until the SHIFT quantity of the OVER
SCAN on upside and downside becomes minimum.
2-12: 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.
