ELECTRICAL ADJUSTMENTS
D3-2
2-6: E-E LEVEL
1.
2.
3.
Receive the PAL color bar pattern. (Audio Video Input)
Connect the oscilloscope to TP4201.
Check if the VIDEO OUT LEVEL is 1
±
0.2Vp-p.
2-7: COLOR LEVEL
1.
2.
3.
Receive the color bar pattern.
Connect the oscilloscope to TP4201.
When setting to the Y-LEVEL 100%, check if the
MAGENTA is 45
±
10%.
(TV SECTION)
2-8: CONSTANT VOLTAGE
1.
2.
3.
4.
Using the remote control, set the brightness and
contrast to normal position.
Connect the digital voltmeter to TP501 (R512).
Set condition is AV MODE without signal.
Adjust the VR502 until the digital voltmeter is 117
±
0.5V.
2-9: FOCUS
1.
2.
3.
Receive a broadcast.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
2-10: HORIZONTAL POSITION
1.
2.
3.
4.
5.
Receive the center cross signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (08) on the remote control to
select "H POSI (50)".
Press the VOL. UP/DOWN button on the remote
control until the right and left screen size of the vertical
line becomes the same.
Receive the cross hatch signal of NTSC. Then perform
the above adjustments 2~4.
2-11: VERTICAL LINEARITY
NOTE: Adjust after performing adjustments in section 2-22.
1.
2.
3.
Receive the cross hatch signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Adjust the VR401 until the SHIFT quantity of the OVER
SCAN on upside and downside becomes minimum.
2-12: APR THRESHOLD
1.
2.
3.
Receive the cross hatch signal from the Pattern
Generator.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (36) on the remote control to
select "APR THRESHOLD".
Check if the step No. APR THRESHOLD is "7".
(MONITOR TUNER)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Place the set with Aging Test for more than 10 minutes.
Connect the oscillator (38.9MHz) to TP601.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (13) on the remote control to
select "VCO COARSE".
Press the F.FWD, REW button on the remote control
until the "OK" appear on the screen. If the "OK"
is not displayed, select the "-" side on the changed
from "+" to "-".
Press the CH UP button once to set to "VCO FINE"
mode.
Press the F.FWD, REW button on the remote control
to select the 4 step down point from the upper limit on
the "OK".
(Example: In case of the "OK" point 30~41, select 38.)
Connect the oscillator (33.95MHz) to TP601.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (15) on the remote control to
select "VCO COARSE L1".
Press the F.FWD, REW button on the remote control
until the "OK" appear on the screen. If the "OK"
is not displayed, select the "-" side on the changed
from "+" to "-".
Press the CH UP button once to set to "VCO FINE L1"
mode.
Press the F.FWD, REW button on the remote control
to select the 5 step down point from the upper limit on
the "OK".
(Example: In case of the "OK" point 30~41, select 37.)
2-3: RF AGC
2-4: 21 PIN AUDIO OUT
1.
2.
3.
4.
5.
Receive the PAL VHF HIGH.
Connect the AC voltmeter to pin3 of J4201.
Check if the 21 PIN AUDIO OUT is 0.5
±
0.2V.
Receive the SECAM UHF.
Check if the 21 PIN AUDIO OUT is 0.5
±
0.2V.
1.
2.
3.
4.
5.
Place the set with Aging Test for more than 15 minutes.
Receive the UHF (63
±
1dB).
Connect the digital voltmeter between the pin 5 of
CP603 and the pin 1 (GND) of CP603.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "RF AGC".
Press the F.FWD, REW button on the remote control
until the digital voltmeter is 2.6
±
0.1V.
(MONITOR TUNER)
1.
2.
3.
4.
5.
Place the set with Aging Test for more than 15 minutes.
Receive the UHF (63
±
1dB).
Connect the digital voltmeter between the pin 6 of
CP603 and the pin 1 (GND) of CP603.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (39) on the remote control to
select "REC AGC".
Press the F.FWD, REW button on the remote control
until the digital voltmeter is 2.4
±
0.1V.
(REC TUNER)
Receive the PAL UHF.
Connect the oscilloscope to TP4201.
Check if the 21 PIN VIDEO OUT is 1.0
±
0.2V.
Receive the SECAM UHF.
Check if the 21 PIN VIDEO OUT is 1.0
±
0.2V.
2-5: 21 PIN VIDEO OUT
1.
2.
3.
4.
5.
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