Toshiba MD20FM1 Service Manual page 22

2-5: 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 (04) on the remote control to
select "G DRV".
5.
Press the CH. UP/DOWN button on the remote control
to select the "R CUT", "G CUT", "B CUT", "G DRV" or
"B DRV".
6.
Adjust the RIGHT/LEFT button on the remote control to
whiten the R CUT, G CUT, B CUT, G DRV, and B DRV
at each step tone sections equally.
7. Perform the above adjustments 5 and 6 until the white
color is looked like a white.
2-6: 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 (19) 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.
2-7: 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 (26) on the remote control to
select "WIDS".
4. Press the RIGHT/LEFT button on the remote control
until the SHIFT quantity of the OVER SCAN on right
and left becomes 10 ± 2%.
2-8: VERTICAL SHIFT
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 (20) on the remote control to
select "VPOSI".
4. Press the RIGHT/LEFT button on the remote control
until the horizontal line becomes fit to the notch of the
shadow mask.
2-9: 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 (21) on the remote control to
select "VSIZE".
4. Press the RIGHT/LEFT 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.
ELECTRICAL ADJUSTMENTS
D-2
2-10: VERTICAL LINEARITY
NOTE: Adjust after performing adjustments in section 2-9.
After the adjustment of Vertical Linearity, reconfirm
the Vertical Shift 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 (22) 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.
2-11: PARABOLA CORR
1. Receive the rainbow pattern 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 (24) on the remote control to
select "DPCS".
4. Press the RIGHT/LEFT button on the remote control
until the right and left vertical lines are straight.
2-12: TRAPEZIUM
1. Receive the rainbow pattern 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 (25) on the remote control to
select "KEYS".
4. Press the RIGHT/LEFT button on the remote control
until the both vertical lines of the screen become
parallel.
2-13: CORNER CORR TOP
1. Receive the rainbow pattern 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 (31) on the remote control to
select "CNRT".
4. Press the RIGHT/LEFT button on the remote control
until the upper section of the both ends vertical lines are
straight.
2-14: CORNER CORR BOTTOM
1. Receive the rainbow pattern from the Pattern Generator.
2. Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
3.
press the channel button (32) on the remote control to
select "CNRB".
4. Press the RIGHT/LEFT button on the remote control
until the bottom section of the both ends vertical lines
are straight.