Toshiba 27a43 Service Manual page 14

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 (06) on the remote control to
select "H. SIZE".
4. Press the VOL. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on right and
left becomes 11 ± 1%.
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 VR401 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 (07) 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 9 ± 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 (08) on the remote control to
select "V. LIN".
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.
2-10: LEVEL
1. Receive the monoscope pattern (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 (33) on the remote control to
select "LEVEL".
4. Press the VOL. UP/DOWN button on the remote
control until the AC voltmeter is 75 ± 2mV.
ELECTRICAL ADJUSTMENTS
D-2
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 (30) on the remote control to
select "PARABOLA".
4. Press the VOL. UP/DOWN button on the remote control
until the right and left vertical lines are straight.
2-12: 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 (32) on the remote control to
select "TRAPEZIUM".
4. Press the VOL. UP/DOWN button on the remote control
until the both vertical lines of the screen become parallel.
2-13: SEPARATION 1, 2
Please do the method (1) or method (2) adjustment.
Method (1)
1. Set the multi-sound signal generator for each different
L-ch and R-ch frequency (Ex. L-ch=2KHz, R-ch=400Hz)
and receive the RF.
2. Connect the oscilloscope to the Audio Out Jack.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (34) on the remote control to
select "SEP 1".
4. Press the VOL. UP/DOWN button on the remote control
to adjust it until the audio output wave becomes a fine
sine wave.
5. Press the CH UP button once the set to "SEP 2" mode.
Then perform the above adjustment 4.
Method (2)
Set the multi-sound signal generator L-ch=1KHz, R-ch
1.
=Non input and receive the RF.
2. Connect the oscilloscope to the Audio Out Jack (R-ch).
Press the AUDIO SELECT button on the remote control
3.
to set to the stereo mode.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (34) on the remote control to
select "SEP 1".
Press the VOL. UP/DOWN button on the remote control
5.
to adjust it until the R-ch output becomes minimum.
6. Set the multi-sound signal generator L-ch=Non input,
R-ch=1KHz and receive the RF.
Connect the oscilloscope to the Audio Out Jack (L-ch).
7.
8. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (35) on the remote control to
select "SEP 2".
9. Press the VOL. UP/DOWN button on the remote control
to adjust it until the L-ch output becomes minimum.