Toshiba MD9DM1R Service Manual page 25

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 (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.
2-5: FOCUS
1. Receive the monoscope pattern.
2. Turn the Focus Volume fully counterclockwise once.
3. Adjust the Focus Volume until picture is distinct.
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: VERTICAL POSITION
1. Receive the monoscope pattern.
2. Using the remote control, set the brightness and
contrast to normal position.
3. Adjust the VR402 until the horizontal line becomes fit to
the notch of the shadow mask.
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 (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
2-9: VERTICAL LINEARITY
NOTE: Adjust after performing adjustments in section 2-8.
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 (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.
2-10: OSD HORIZONTAL
1. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (33) on the remote control to
select "OSD".
2. Press the RIGHT/LEFT button on the remote control
until the difference of A and B becomes minimum.
(Refer to Fig. 2-1)
33 OSD
15
A
2-11: LEVEL
1. Receive the VHF HIGH (70dB).
2. Connect the AC voltmeter to pin 6 of CP101.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (69) on the remote control to
select "LVL".
4. Press the RIGHT/LEFT button on the remote control
until the AC voltmeter is 72 ± 2mV.
B
Fig. 2-1