ELECTRICAL ADJUSTMENTS
D3-2
2-3: RF AGC
1.
2.
3.
4.
5.
Place the set in Aging Test for more than 15 minutes.
Receive the UHF (63
±
1dB).
Connect the digital voltmeter between the pin 5 of
CP603 and the pin 1 (GND) of CP603.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "RF AGC".
Press the LEFT/RIGHT button on the remote control
until the digital voltmeter is 2.6
±
0.05V.
(MONITOR TUNER)
(TV SECTION)
2-4: CONSTANT VOLTAGE
1.
2.
3.
4.
Connect the digital voltmeter to TP401.
Place the set in AV MODE without signal.
Using the remote control, set the brightness and contrast
to normal position.
Adjust the VR1701 until the digital voltmeter is 115
±
1V.
2-5: FOCUS
1.
2.
3.
Receive the monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
2-6: HORIZONTAL POSITION
1.
2.
3.
4.
5.
6.
Receive the monoscope 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 (08) on the remote control to
select "H POSI (50)".
Press the LEFT/RIGHT button on the remote control
until the SHIFT quantity of the OVER SCAN on right
and left becomes minimum.
Receive the cross hatch signal of NTSC. (Audio Video
Input)
Press the AV button on the remote control to set to the
AV mode. Then perform the above adjustments 2~4.
2-7: VERTICAL SIZE
Receive the monoscope 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 (11) on the remote control to
select "V SIZE (50)".
Adjust by using the LEFT/RIGHT button on the remote
control so that the Up/Down OVER SCAN Quantity
becomes equal to the Right/Left OVER SCAN Quantity.
Receive a broadcast and check if the picture is normal.
Receive the cross hatch signal of NTSC. (Audio Video
Input)
Press the AV button on the remote control to set to the
AV mode. Then perform the above adjustments 2~5.
1.
2.
3.
4.
5.
6.
7.
2-8: VERTICAL LINEARITY
1.
2.
3.
Receive the monoscope pattern from the Pattern
Generator.
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.
2-9: OSD HORIZONTAL
1.
2.
3.
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 (31) on the remote control to
select "H POS OSD".
Press the LEFT/RIGHT button on the remote control
until the difference of A and B becomes minimum.
(Refer to Fig. 2-2)
31 H POS OSD 40
A
B
Fig. 2-2
2-10: CUT OFF
1.
2.
3.
4.
5.
Place the set in AV MODE without signal.
Using the remote control, set the brightness and
contrast to normal position.
Place the set with Aging Test for more than 15 minutes.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (00) on the remote control to
select "CUT OFF".
Adjust the Screen Volume until a dim raster is obtained.
TV
2-11: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1.
2.
3.
4.
5.
6.
7.
Place the set in Aging Test for more than 15 minutes.
Receive the gray scale pattern from the Pattern
Generator with Burst On.
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 (03) on the remote control to
select "R DRIVE".
Press the CH. UP/DOWN button on the remote control
to select the "R DRIVE", "G DRIVE", "M R CUTOFF" or
"M G CUTOFF".
Adjust the LEFT/RIGHT button on the remote control to
whiten the R DRIVE, G DRIVE, M R CUT OFF, and M G
CUT OFF at each step tone sections equally.
Perform the above adjustments 5 and 6 until the white
color is achieved.