Toshiba 20AF44 Service Manual page 15

2-11: 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 "86".
3. Receive a broadcast and check if the picture is normal.
4. Press the TV/VIDEO button on the remote control to set
to the AV mode. Then perform the above adjustments
1~3.
5. Press the TV/VIDEO button on the remote control to set
to the CS mode. Then perform the above adjustments
1~3.
2-12: 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)
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 (34) 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 (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.
ELECTRICAL ADJUSTMENTS
D-3
2-13: 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 85 ± 2mV.
2-14: Confirmation of Fixed Value (step No.)
Please check if the fixed values of the each adjustment
items are set correctly referring below.
NO. FUNCTION
00 OSD H
02 H.VCO
04 AFC GAIN
05 V.SHIFT
06 H.SIZE
09 VS CORRECTION
15 BRIGHT MAX
17 BRIGHT MIN
19 CONTRAST CENT
20 CONTRAST MIN
21 COLOR MAX
23 COLOR MIN
25 SHARPNESS
26 CB DELAY FINE
27 CR DELAY FINE
30 E/W PARABOLA
31 E/W CORNER
32 E/W TRAPEZIUM
STEP NO.
25
03
07
02
01
34
125
75
50
18
90
00
40
00
00
31
31
31