Toshiba MV19M4 Service Manual page 31

Color television/video cassette recorder
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2-3: RF AGC
1.
Receive the VHF HIGH (63dB).
2.
Connect the digital voltmeter between the pin 5 of
CP351 and the pin 1 (GND) of CP351.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (02) on the remote control to
select "RF AGC DELAY".
4.
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.9 ± 0.5V..
(TV SECTION)
2-4: CONSTANT VOLTAGE
1.
Connect the digital voltmeter to the TP601.
2.
Set condition is AV MODE without signal.
3.
Using the remote control, set the brightness and contrast
to normal position.
Adjust the VR502 until the digital voltmeter is 135 ± 0.5V.
4.
2-5: CUT OFF
1.
Adjust the unit to the following settings.
R CUT OFF=128, G CUT OFF=128, B CUT OFF=128,
BRIGHTNESS=128, CONTRAST=100
2.
Place the set with Aging Test for more than 15 minutes.
3.
Set condition is AV MODE without signal.
4.
Using the remote control, set the brightness and
contrast to normal position.
5.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "CUT OFF".
6.
Adjust the Screen Volume until a dim raster is obtained.
2-6: 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 (10) on the remote control to
select "R CUT OFF".
Press the CH. UP/DOWN button on the remote control
5.
to select the "R CUT OFF", "G CUT OFF", "B CUT
OFF", "R DRIVE" or "G 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 G DRIVE at each step tone sections equally.
Perform the above adjustments 5 and 6 until the white
7.
color is looked like a white.
2-7: FOCUS
1.
Receive the monoscope pattern.
2.
Using the remote control, set the brightness and
contrast to normal position.
3.
Turn the Focus Volume fully counterclockwise once.
4.
Adjust the Focus Volume until picture is distinct.
ELECTRICAL ADJUSTMENTS
D3-2
2-8: HORIZONTAL PHASE
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 (05) on the remote control to
select "H PHASE".
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.
2-9: 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 (07) on the remote control to
select "V SHIFT".
4.
Check if the step No. V. SHIFT is "3".
5.
Adjust the VR401 until the horizontal line becomes fit to
the notch of the shadow mask.
2-10: 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 (06) on the remote control to
select "V SIZE".
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.
2-11: SUB BRIGHTNESS
1.
Receive the monoscope pattern. (RF Input)
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 (13) on the remote control to
select "BRIGHTNESS".
4.
Press the VOL. UP/DOWN button on the remote
control until the white 10% is starting to be visible
5.
Receive the monoscope pattern. (Audio Video Input)
6.
Press the INPUT SELECT button on the remote control
to set to the AV mode. Then perform the above
adjustments 2~4.
2-12: SUB CONTRAST
1.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (14) on the remote control to
select "CONTRAST".
2.
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "100"
3.
Press the INPUT SELECT button on the remote control
to set to the AV mode. Then perform the above
adjustments 1~2.

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