White Balance; Horizontal Position; Vertical Position; Vertical Size - Toshiba MD13P3 Service Manual

ELECTRICAL ADJUSTMENTS
2-4: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1. Place the set with Aging Test for more than 15 minutes.
2. Receive the gray scale pattern from the Pattern
Generator.
3. Using the remote control, set the brightness and contrast
to normal position.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (16) on the remote control to
select "G DRIVE".
5. 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".
6. 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 DRIVE at each step tone sections equally.
7. Perform the above adjustments 5 and 6 until the white
color is looked like a white.
2-5: HORIZONTAL POSITION
1. Receive the monoscope pattern.
2. Using the remote control, set the brightness and contrast
to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (04) on the remote control to
select "HPOSF.
4. Press the VOL. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on right and
left becomes minimum.
2-6: VERTICAL POSITION
1. Receive the monoscope pattern.
2. Using the remote control, set the brightness and contrast
to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (08) on the remote control to
select "VPOSF.
4. Check if the step No. V POSI is "02".
5. Adjust the VR401 until the horizontal line becomes fit
to notch of the shadow mask.
2-7: VERTICAL SIZE
1. Receive the monoscope pattern.
2. Using the remote control, set the brightness and contrast
to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (07) on the remote control to
select "VSIZE".
4. Press the VOL. UP/DOWN button on the remote control
until the Up/Down OVER SCAN Quantity becomes equal
to the Right/Left OVER SCAN Quantity.
5. Receive a broadcast and check if the picture is normal.
2-8: VERTICAL LINEARITY
NOTE: Adjust after performing adjustments in section 2-7.
After the adjustment of Vertical Linearity, reconfirm
the Vertical Position and Vertical Size adjustments.
1. Receive the monoscope pattern.
2. Using the remote control, set the brightness and contrast
to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (09) on the remote control to
select "VLIN".
4. Press the VOL. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on upside
and downside becomes minimum,
2-9: SEPARATION
Please do the method (1) or method (2) adjustment,
Method (1)
1. 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.
2. Connect the oscilloscope to the Audio Out Jack.
3. Press the AUDIO button on the remote control to set to
the stereo mode.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (64) on the remote control to
select "SEPAL".
5. Press the VOL. UP/DOWN button on the remote control
to adjust it until the audio output wave becomes a fine
sine wave.
6. Press the CH UP button 1 time to set to "SEPAH" mode.
7. Press the VOL. UP/DOWN button on the remote control
to adjust it until the audio output wave becomes a fine
sine wave.
Method (2)
1. Set the multi_sound signal generator L-ch=lKHz, R_ch
=Non input and receive the RF signal.
2. Connect the oscilloscope to the Audio Out Jack (R-eh).
3. Press the AUDIO button on the remote control to set to
the stereo mode.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (64) on the remote control to
select "SEPAL".
5. Press the VOL. UP/DOWN button on the remote control
to adjust it until the R-ch output becomes minimum.
6. Press the CH UP button 1 time to set to "SEPAH" mode.
7. Press the VOL. UP/DOWN button on the remote control
to adjust it until the R-ch output becomes minimum.
8. Set the multi*sound signal generator L-ch=Non input,
R-ch=l KHz and receive the RF signal.
9. Connect the oscilloscope to the Audio Out Jack (L-oh).
Then perform the above adjustments 3-7.
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