Toshiba 20AF41 Service Manual - Page 11

Receive the stereo signal L=2KHz, R=400Hz.

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ELECTRICAL ADJUSTMENTS 2-16: SEPARATION 1, 2 1. Receive the stereo signal (L=2KHz, R=400Hz). 2. Connect the AC voltmeter to AUDIO OUT JACK though stereo filter (L=400Hz, R=2KHz). 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (31) on the remote control to select "SEP1". 4. Press the VOL. UP/DOWN button on the remote control until the output of L-CH and R-CH become minimum. 5. Press the CH UP button once the set to "SEP2" mode. 6. Press the VOL. UP/DOWN button on the remote control until the output of L-CH and R-CH become minimum. 7. Press the CH DOWN button once the set to "SEP1" mode. 8. Repeat step 4 to step 7 several times. The output difference of the between with Filter and without Filter should be more than 25db for both L and R. 2-17: BRIGHTNESS 1. Activate the adjustment mode display of Fig. 1-1 and press the channel button (16) on the remote control to select "BRI". 2. Press the VOL. UP/DOWN button on the remote control until the brightness step No. becomes "68" 3. Press the TV/VIDEO button on the remote control to set to the AV mode. Then perform the above adjustments 1~2. 4. Press the TV/VIDEO button on the remote control to set to the CS mode. Then perform the above adjustments 1~2. 2-19: SUB TINT/SUB COLOR 1. Receive the color bar pattern. (RF Input) 2. Connect the synchro scope to TP806. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (20) on the remote control to select "TINT". 4. Press the VOL. UP/DOWN button on the remote control until the waveform becomes as shown in Fig. 2-2. 5. Connect the synchro scope to TP804. 6. Press the CH DOWN button 3 times to set to "SUBCONT" mode. 7. Press the VOL. UP/DOWN button on the remote control until the red color level is adjusted to 115% of the white level. (Refer to Fig. 2-3) 8. Receive the color bar pattern. (Audio Video Input) 9. Press the TV/VIDEO button on the remote control to set to the AV mode. Then perform the above adjustments 2~7. 10.Receive the color bar pattern. (Audio Video Input) 11.Press the TV/VIDEO button on the remote control to set to the CS mode. Then perform the above adjustments 2~6. 12.Press the VOL. UP/DOWN button on the remote control until the red color level is adjusted to 140% of the white level. (Refer to Fig. 2-4) 2-18: UNI-COLOR 1. Activate the adjustment mode display of Fig. 1-1 and press the channel button (18) on the remote control to select "UNI COL". 2. Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "8" 3. Press the TV/VIDEO button on the remote control to set to the AV mode. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (18) on the remote control to select "UNI COL". 5. Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "4" 6. Press the TV/VIDEO button on the remote control to set to the CS mode. Then perform the above adjustments 4~5. Fig. 2-2 White 100% RED Level Fig. 2-3 White 100% RED Level Fig. 2-4

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ELECTRICAL ADJUSTMENTS
2-16: SEPARATION 1, 2
Receive the stereo signal (L=2KHz, R=400Hz).
Connect the AC voltmeter to
AUDIO OUT JACK
though
stereo filter (L=400Hz, R=2KHz).
Activate the adjustment mode display of
Fig. 1-1
and
press the channel button
(31)
on the remote control to
select "SEP1".
Press the VOL. UP/DOWN button on the remote control
until the output of L-CH and R-CH become minimum.
Press the CH UP button once the set to "SEP2" mode.
Press the VOL. UP/DOWN button on the remote control
until the output of L-CH and R-CH become minimum.
Press the CH DOWN button once the set to "SEP1"
mode.
Repeat step
4 to step 7 several times.
The output difference of the between with Filter and
without Filter should be more than 25db for both L and R.
1.
2.
3.
4.
5.
6.
7.
8.
2-19: SUB TINT/SUB COLOR
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Receive the color bar pattern. (RF Input)
Connect the synchro scope to
TP806
.
Activate the adjustment mode display of
Fig. 1-1
and
press the channel button
(20)
on the remote control to
select "TINT".
Press the VOL. UP/DOWN button on the remote control
until the waveform becomes as shown in
Fig. 2-2
.
Connect the synchro scope to
TP804
.
Press the CH DOWN button 3 times to set to
"SUBCONT" mode.
Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 115% of the white
level.
(Refer to Fig. 2-3)
Receive the color bar pattern. (Audio Video Input)
Press the TV/VIDEO button on the remote control to set
to the AV mode. Then perform the above adjustments
2~7.
Receive the color bar pattern. (Audio Video Input)
Press the TV/VIDEO button on the remote control to set
to the CS mode. Then perform the above adjustments
2~6.
Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 140% of the white
level.
(Refer to Fig. 2-4)
Fig. 2-2
Fig. 2-3
White 100%
RED Level
Fig. 2-4
White 100%
RED Level
2-17: BRIGHTNESS
1.
2.
3.
4.
Activate the adjustment mode display of
Fig. 1-1
and
press the channel button
(16)
on the remote control to
select "BRI".
Press the VOL. UP/DOWN button on the remote control
until the brightness step No. becomes "68"
Press the TV/VIDEO button on the remote control to set
to the AV mode. Then perform the above adjustments
1~2.
Press the TV/VIDEO button on the remote control to set
to the CS mode. Then perform the above adjustments
1~2.
2-18: UNI-COLOR
1.
2.
3.
4.
5.
6.
Activate the adjustment mode display of
Fig. 1-1
and
press the channel button
(18)
on the remote control to
select "UNI COL".
Press the VOL. UP/DOWN button on the remote control
until the contrast step No. becomes "8"
Press the TV/VIDEO button on the remote control to set
to the AV mode.
Activate the adjustment mode display of
Fig. 1-1
and
press the channel button
(18)
on the remote control to
select "UNI COL".
Press the VOL. UP/DOWN button on the remote control
until the contrast step No. becomes "4"
Press the TV/VIDEO button on the remote control to set
to the CS mode. Then perform the above adjustments
4~5.