Toshiba MV9DL2 Service Manual page 33

2-3: VCO FREERUN
1. Place the set with Aging Test for more than 10 minutes.
2. Connect the digital voltmeter between the pin 7 of
CP602 and the pin 1 (GND) of CP602.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (03) on the remote control to
select "VIF VCO".
4. Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.5 ± 0.5V.
(TV SECTION)
2-4: CONSTANT VOLTAGE
1. Input DC12V to DC Jack and turn Power ON.
2. Connect the digital voltmeter to TP401 and GND.
3. Set condition is AV MODE without signal.
Adjust the VR501 until the digital voltmeter is 101 ± 0.5V.
4.
5. Input AC100V to AC cord and remove the DC Jack cord.
Check if the Power is ON before doing the above
Procedure.
Adjust the VR502 until the digital voltmeter is 102 ± 0.5V.
6.
2-5: CUT OFF
1. Adjust the unit to the following settings.
R.DRIVE=64, B.DRIVE=64, R.BIAS=128, G.BIAS=128,
B.BIAS=128, SUB BRIGHT=128, SUB CONTRAST=96.
2. Place the set with Aging Test for more than 15 minutes.
3. Set condition is AV MODE without signal.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "CUT OFF".
5. Adjust the Screen Volume until a dim raster is obtained.
2-6: FOCUS
1. Receive the monoscope pattern.
2. Turn the Focus Volume fully counterclockwise once.
3. Adjust the Focus Volume until picture is distinct.
2-7: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1. Place the set with Aging Test for more than 15 minutes.
2. Receive the white 100% signal 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 (10) on the remote control to
select "R.BIAS".
5. Using the VOL. UP/DOWN button on the remote control,
adjust the R.BIAS.
6. Press the CH. UP/DOWN button on the remote control to
select the "R.DRIVE", "B.DRIVE", "G.BIAS" or "B.BIAS".
7. Using the VOL. UP/DOWN button on the remote control,
adjust the R.DRIVE, B.DRIVE, G.BIAS or B.BIAS.
8. Perform the above adjustments 6 and 7 until the white
color is looked like a white.
2-8: H. VCO
1. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (04) on the remote control to
select "H VCO".
2. Check if the step No. of H VCO is "4".
ELECTRICAL ADJUSTMENTS
2-9: SUB BRIGHTNESS
1. Receive the monoscope pattern. (RF Input)
2. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (13) on the remote control to
select "BRIGHTNESS".
3. Press the VOL. UP/DOWN button on the remote control
to adjust to the point just before the white 5% begin to
shine.
4. Receive the monoscope pattern. (Audio Video Input)
5. Press the INPUT SELECT button on the remote control
to set to the AV mode. Then perform the above
adjustments 2~3.
2-10: SUB TINT
1. Receive the color bar pattern. (RF Input)
2. Connect the oscilloscope to TP803.
3. Using the remote control, set the brightness, contrast,
color and tint 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 "TINT".
5. Press the VOL. UP/DOWN button on the remote control
until the section "A" becomes a straight line.
(Refer to Fig. 2-2.)
6. Receive the color bar pattern. (Audio Video Input)
7. Press the INPUT SELECT button on the remote control
to set to the AV mode. Then perform the above
adjustments 3~5.
2-11: SUB COLOR
1. Receive the color bar pattern. (RF Input)
2. Connect the oscilloscope to TP801.
3. Using the remote control, set the brightness, contrast,
color and tint to normal position.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (15) on the remote control to
select "COLOR".
5. Adjust the VOLTS RANGE VARIABLE knob of the
oscilloscope until the range between white 100% and
0% is set to 4 scales on the screen of the oscilloscope.
6. Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 120 ± 5% of the
white level. (Refer to Fig. 2-3)
7. Receive the color bar pattern. (Audio Video Input)
8. Press the INPUT SELECT button on the remote control
to set to the AV mode. Then perform the above
adjustments 2~6.
D2-2
"A"
Fig. 2-2