Memorex MVD2113, Service Manual

Page: 81 / 116

ELECTRICAL ADJUSTMENTS
D-2
2-5: 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 "HPOSI".
Press the LEFT/RIGHT button on the remote control until
the SHIFT quantity of the OVER SCAN on right and left
becomes minimum.
2-6: VERTICAL POSITION
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 (08) on the remote control to
select "VPOSI".
Check the step No. V POSI is "02".
Adjust the VR401 until the horizontal line becomes fit
to notch of the shadow mask.
2-4: 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 (16) on the remote control to
select "G DRV".
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 "B 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 B DRIV E at each step tone sections equally.
Perform the above adjustments 5 and 6 until the white
color is looked like a white.
2-7: VERTICAL SIZE
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 "VSIZE".
Press the LEFT/RIGHT button on the remote control until
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.
2-8: VERTICAL LINEARITY
1.
2.
3.
4.
NOTE:
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 (09) on the remote control to
select "VLIN".
Press the LEFT/RIGHT button on the remote control until
the SHIFT quantity of the OVER SCAN on upside and
downside becomes minimum.
Adjust after performing adjustments in section 2-7.
After the adjustment of Vertical Linearity, reconfirm
the Vertical Position and Vertical Size adjustments.
2-9: SEPARATION L, H
1.
2.
3.
4.
5.
6.
7.
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 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 (64) on the remote control to
select "SEPAL".
Press the LEFT/RIGHT button on the remote control to
adjust it until the audio output wave becomes a fine sine
wave.
Press the CH UP button 1 time to set to "SEPAH" mode.
Press the LEFT/RIGHT button on the remote control to
adjust it until the audio output wave becomes a fine sine
wave.
Method (1)
Please do the method (1) or method (2) adjustment.
1.
2.
3.
4.
5.
6.
7.
8.
9.
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 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 (64) on the remote control to
select "SEPAL".
Press the LEFT/RIGHT button on the remote control to
adjust it until the R-ch output becomes minimum.
Press the CH UP button 1 time to set to "SEPAH" mode.
Press the LEFT/RIGHT 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).
Then perform the above adjustments 3~7.
Method (2)