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AV-20FD24
2-4: 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 (16) on the remote control to select "G DRV".
5. Press the CH. UP/DOWN button on the remote control to select
the "R CUT", "G CUT", "B CUT", "R DRV" or "B DRV".
6. Adjust the VOL. UP/DOWN button on the remote control to
whiten the R CUT, G CUT, B CUT, R DRV, and B DRV at each
step tone sections equally.
7. Perform the above adjustments 5 and 6 until the white color is
looked like a white.
2-5: HORIZONTAL POSITION
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 (04) on the remote control to select "HPOSI".
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.
2-6: VERTICAL POSITION
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 "VPOSI".
4. Check if the step No. V POSI is "01".
5. Adjust the VR402 until the horizontal line becomes fit to notch of
the shadow mask.
2-7: 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 "VSIZE".
4. Press the VOL. UP/DOWN button on the remote control until the
Up/Down OVER SCAN Quantity becomes equal to the Right/Left
OVER SCAN Quantity.
5. Receive a broadcast and check if the picture is normal.
20
2-8: VERTICAL LINEARITY
NOTE: Adjust after performing adjustments in section 2-7.
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 (09) on the remote control to select "VLIN".
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.
2-9: LEVEL
1. Receive the VHF HIGH (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 (63) on the remote control to select "LVL".
4. Press the VOL. UP/DOWN button on the remote control until the
AC voltmeter is 75 ± 2mV.
2-10: SEPARATION
Please do the method (1) or method (2) adjustment.
Method (1)
1. Set the multi-sound signal generator for each different Lch and
R-ch frequency (Ex. L-ch=2KHz, R-ch=400Hz) and receive the
RF signal.
2. Connect the oscilloscope to the Audio Out Jack.
3. Press the AUDIO 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 (64) on the remote control to select "SEPAL".
5. Press the VOL. UP/DOWN button on the remote control to adjust
it until the audio output wave becomes a fine sine wave.
6. Press the CH UP button 1 time to set to "SEPAH" mode.
7. Press the VOL. UP/DOWN button on the remote control to adjust
it until the audio output wave becomes a fine sine wave.
Method (2)
1. Set the multi-sound signal generator L-ch=1KHz, R-ch=Non input
and receive the RF signal.
2. Connect the oscilloscope to the Audio Out Jack (R-ch).
3. Press the AUDIO 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 (64) on the remote control to select "SEPAL".
5. Press the VOL. UP/DOWN button on the remote control to adjust
it until the R-ch output becomes minimum.
6. Press the CH UP button 1 time to set to "SEPAH" mode.
7. Press the VOL. UP/DOWN button on the remote control to adjust
it until the R-ch output becomes minimum.
8. Set the multi-sound signal generator L-ch=Non input, R-ch=1KHz
and receive the RF signal.
9. Connect the oscilloscope to the Audio Out Jack (L-ch).
Then perform the above adjustments 3~7.
No. 52133
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