Toshiba 24AF42 Service Manual page 13

2-13: CONTRAST MAX MANUAL
1. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (18) on the remote control to
select "CONT. MAX".
2. Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "85".
3. Receive a broadcast and check if the picture is normal.
4. Press the INPUT button on the remote control to set
to the AV mode. Then perform the above adjustments
1~3.
5. Press the INPUT button on the remote control to set
to the CS mode. Then perform the above adjustments
1~3.
2-14: 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 (37) 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)
1. Set the multi-sound signal generator L-ch=1KHz, R-ch
=Non input and receive the RF.
2. Connect the oscilloscope to the Audio Out Jack (R-ch).
3. Press the AUDIO SELECT button on the remote control
to set to the stereo mode.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (37) on the remote control to
select "SEP 1".
5. Press the VOL. UP/DOWN button on the remote control
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.
7. Connect the oscilloscope to the Audio Out Jack (L-ch).
8. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (38) 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.
2-15: LEVEL
1. Receive the monoscope pattern (70dB).
2. Connect the AC voltmeter to pin 6 of CP101 and the pin
1 (GND) of CP101.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (36) 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
2-16: OSD HORIZONTAL
1. Activate the adjustment mode display of Fig. 1-1.
2. Press the VOL. UP/DOWN button on the remote control
until the difference of A and B becomes minimum.
(Refer to Fig. 2-3)
00 OSD
A
2-17: CORNER CORR TOP
1. Receive the crosshatch signal from the Pattern Generator.
Using the remote control, set the brightness and contrast
2. to normal position.
Activate the adjustment mode display of Fig. 1-1 and
3. press the channel button (31) on the remote control to
select "COR TOP".
4. Press the VOL. UP/DOWN button on the remote control
until the upper section of the both ends vertical lines are
straight.
2-18: CORNER CORR BOTTOM
1. Receive the crosshatch signal from the Pattern Generator.
Using the remote control, set the brightness and contrast
2. 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 "COR BTM".
4. Press the VOL. UP/DOWN button on the remote control
until the bottom section of the both ends vertical lines are
straight.
2-19: 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 (30) on the remote control to
select "TRAPEZIU".
4. Press the VOL. UP/DOWN button on the remote control
until the both vertical lines of the screen become parallel.
2-20: 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 (29) 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.
TV
15
B
Fig. 2-3