D-3
ELECTRICAL ADJUSTMENTS
2-16: LEVEL
1.
2.
3.
4.
Receive a 80dB monoscope pattern.
Connect the AC voltmeter to the pin 2 of J707.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (25) on the remote control to
select "LEVEL".
Press the VOL. UP/DOWN button on the remote
control until the AC voltmeter is 100mV.
2-15: FM LEVEL
1.
2.
3.
4.
Receive a 80dB monoscope pattern.
Connect the AC voltmeter to the pin 14 of IC901.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (24) on the remote control to
select "FM LEVEL".
Press the VOL. UP/DOWN button on the remote
control until the AC voltmeter is 75 ± 5mV.
2-17: CONTRAST MAX
1.
2.
3.
4.
5.
6.
7.
Receive the color bar pattern. (RF Input)
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 (17) on the remote control to
select "CONT MAX".
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "100".
Receive a broadcast and check if the picture is normal.
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
2~5.
Please check if the fixed values of the each adjustment
items are set correctly referring below.
2-18: Confirmation of Fixed Value (step No.)
NO.
04
14
15
16
18
20
21
23
28
29
FUNCTION
H VCO
BRIGHT MAX
BRIGHT MIN
CONT CENT
CONT MIN
COLOR MAX
COLOR MIN
SHARPNESS
TEST MONO
TEST STERIO
RF
04
165
50
56
20
78
01
40
00
00
AV
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2-13: CONSTANT VOLTAGE
1.
2.
3.
4.
5.
Place the set with Aging Test for more than 15 minutes.
Connect the digital voltmeter to the TP402.
Set condition is AV MODE without signal.
Using the remote control, set the brightness and contrast to
normal position.
Adjust the VR502 until the digital voltmeter is 130 ± 0.5V.
2-14: SEPARATION 1, 2
1.
2.
3.
4.
5.
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.
Connect the oscilloscope to the pin 6 and pin 7 of CP601.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (26) on the remote control to
select "SEP 1".
Press the VOL. UP/DOWN button on the remote control to
adjust it until the audio output wave becomes a fine sine
wave.
Press the CH UP button once the set to "SEP 2" mode.
Then perform the above adjustment 4.
Method (1)
1.
2.
3.
4.
5.
6.
7.
8.
9.
Set the multi-sound signal generator L-ch=1KHz, R-ch
=Non input and receive the RF.
Connect the oscilloscope to the pin 6 and pin 7 of CP601
Press the AUDIO SELECT button on the remote control to
set to the stereo mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (26) on the remote control to
select "SEP 1".
Press the VOL. UP/DOWN button on the remote control to
adjust it until the R-ch output becomes minimum.
Set the multi-sound signal generator L-ch=Non input,
R-ch=1KHz and receive the RF.
Connect the oscilloscope to the pin 6 and pin 7 of CP601
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (27) on the remote control to
select "SEP 2".
Press the VOL. UP/DOWN button on the remote control to
adjust it until the L-ch output becomes minimum.
Method (2)
Please do the method (1) or method (2) adjustment.
Содержание MT2271S
Страница 33: ...M3L5 19G SPEC NO O R NO A243512 ...
