ELECTRICAL ADJUSTMENTS
D3-2
2-3: RF AGC
1.
2.
3.
4.
Receive the VHF HIGH (63
±
1dB).
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".
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.7
±
0.05V.
(TV SECTION)
2-4: CONSTANT VOLTAGE
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 PHAS".
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=127, G CUT OFF=127, B CUT OFF=127,
SUB BRI.CENT=127, SUB CONT.MAX=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 CUT OFF.
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 SFT".
Check if the step No. V. SHIFT is "03".
Adjust the VR401 until the horizontal line becomes fit to
the notch of the shadow mask.
1.
2.
3.
4.
Using the remote control, set the brightness and contrast
to normal position.
Connect the digital voltmeter to TP601 (R520).
Set condition is AV MODE without signal.
Adjust the VR502 until the digital voltage is 135
±
0.5V.
2-2: VCO FREERUN
1.
2.
3.
4.
5.
6.
Receive the VHF HIGH (63dB).
Place the set with Aging Test for more than 10 minutes.
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 (03) on the remote control to
select "V.VCO".
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.5V.
After the 2.5V adjustment, countdown the VIF VCO step
No. by 1 step with the VOL. DOWN button.
