Electrical Adjustments - Toshiba MD24F52 Service Manual

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 RIGHT/LEFT 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 CH. 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 achieved.
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 "HPOSI".
4. Press the RIGHT/LEFT button on the remote control until
the SHIFT quantity of the OVER SCAN on right and left
becomes minimum.
2-6: HORIZONTAL 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 (69) on the remote control to
select "E/WDC".
4. Press the RIGHT/LEFT button on the remote control until
the SHIFT quantity of the OVER SCAN on right and left
becomes 12 ± 2%.
2-7: 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 "VPOSI".
4. Check if the step No. V POSI is "02".
5. Adjust the VR404 until the horizontal line becomes fit
to notch of the shadow mask.

ELECTRICAL ADJUSTMENTS

D-2
2-8: 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 RIGHT/LEFT button on the remote control until
the SHIFT quantity of the OVER SCAN on upside and
downside becomes 10 ± 2%.
5. Receive a broadcast and check if the picture is normal.
2-9: 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 RIGHT/LEFT button on the remote control until
the SHIFT quantity of the OVER SCAN on upside and
downside becomes minimum.
2-10: TRAPEZIUM
1. Receive the crosshatch signal from the Pattern Generator.
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 (71) on the remote control to
select "E/WTILT".
4. Press the RIGHT/LEFT button on the remote control until
the both vertical lines of the screen become parallel.
2-11: PARABOLA
1. Receive the crosshatch signal from the Pattern Generator.
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 (70) on the remote control to
select "E/WAMP".
4. Press the RIGHT/LEFT button on the remote control until
the right and left vertical lines are straight.
horizontal line
Notch
Shadow mask
Fig. 2-1