ELECTRICAL ADJUSTMENTS
D3-2
2-4: CONSTANT VOLTAGE
1.
2.
3.
4.
Set condition is AV MODE without signal.
Using the remote control, set the brightness and contrast
to normal position.
Connect the digital voltmeter to TP401.
Adjust the VR1701 until the digital voltmeter is 117
±
0.5V.
2-5: CUT OFF
1.
2.
3.
4.
5.
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.
2-2: RF AGC
1.
2.
3.
4.
5.
Place the set with Aging Test for more than 15 minutes.
Receive the VHF HIGH (63dB).
Connect the digital voltmeter between the pin 5 of
CP601 and the pin 1 (GND) of CP601.
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.
2-3: SEPARATION
1.
2.
3.
4.
5.
Set the multi-sound signal generator for each different L-
ch and R-ch frequency (Ex. L-ch=2KHz, R-ch=400Hz)
and receive the RF signal.
Connect the oscilloscope to the Audio Out Jack.
Press the AUDIO SELECT button on the remote control
to set to the stereo mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (35) on the remote control to
select “FM LVL”.
Press the VOL. UP/DOWN button on the remote control
to adjust it until the audio output wave becomes a fine
sine wave.
Method (1)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Set the multi-sound signal generator L-ch=1KHz, R-ch
=Non input and receive the RF signal.
Connect the oscilloscope to the Audio Out Jack (R-ch).
Press the AUDIO SELECT button on the remote control
to set to the stereo mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (35) on the remote control to
select “FM LVL”.
Press the VOL. UP/DOWN button on the remote control
to adjust it until the R-ch output becomes minimum.
Set the multi-sound signal generator L-ch=Non input,
R-ch=1KHz and receive the RF signal.
Connect the oscilloscope to the Audio Out Jack (L-ch).
Press the AUDIO SELECT button on the remote control
to set to the stereo mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (35) on the remote control to
select “FM LVL”.
Press the VOL. UP/DOWN button on the remote control
to adjust it until the L-ch output becomes minimum.
Method (2)
Please do the method (1) or method (2) adjustment.
(TV SECTION)
2-7: 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: 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 (13) on the remote control to
select "R.BIAS".
Press the CH. UP/DOWN button on the remote control to
select the "R.BIAS", "G.BIAS", "B.BIAS", "B.DRV" or
"G.DRV".
Adjust the VOL. UP/DOWN button on the remote control
to whiten the R.BIAS, G.BIAS, B.BIAS, B.DRV, and
G.DRV at each step tone sections equally.
Perform the above adjustments 5 and 6 until the white
color is looked like a white.
2-8: HORIZONTAL POSITION
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 (04) on the remote control to
select "H.POSI".
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 POSITION
1.
2.
3.
Receive the monoscope pattern.
Using the remote control, set the brightness and contrast
to normal position.
Adjust the VR404 until the horizontal line becomes fit to
the notch of the shadow mask.
