Service manual

ELECTRICAL ADJUSTMENTS
D2-2
1. RF AGC DELAY
2. VIDEO LEVEL
3. FM LEVEL
4. OSD H
5. CUT OFF
6. (VOL TEST)
7. REC AGC DELAY
8. 0. RETURN
"The adjustment items 6 and 8 is not used for this
model."
Fig. 2-2
2-4: 21 PIN AUDIO OUT
1.
2.
3.
4.
5.
Receive the color bar pattern.
Connect the AC voltmeter to pin3 of J4501.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (5) on the remote control to
select "OTHERS". The Fig. 2-2 appears on the display.
Press the channel button (3) on the remote control to
select "FM LEVEL".
Press the PLAY or STOP button on the remote control
until the AC voltmeter is 550 ± 2.5dbm.
2-5: 21 PIN VIDEO OUT
1.
2.
3.
4.
5.
Receive the color bar pattern.
Connect the synchro scope to TP4501.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (5) on the remote control to
select "OTHERS". The Fig. 2-2 appears on the display.
Press the channel button (2) on the remote control to
select "VIDEO LEVEL".
Press the PLAY or STOP button on the remote control
until the synchro scope is 1.0 ± 0.15V.
(TV SECTION)
2-6: CONSTANT VOLTAGE
1.
2.
3.
4.
Using the remote control, set the brightness and contrast
to normal position.
Connect the digital voltmeter to TP401.
Set condition is AV MODE without signal.
Adjust the VR502 until the digital voltmeter is 110 ± 0.5V.
2-7: CUT OFF
1.
2.
3.
4.
5.
6.
Place the set with Aging Test for more than 15 minutes.
Set condition is AV MODE without signal.
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 (5) on the remote control to
select "OTHERS". The Fig. 2-2 appears on the display.
Press the channel button (5) on the remote control to
select "CUT OFF".
Adjust the Screen Volume until a dim raster is obtained.
2-8: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1.
2.
3.
4.
5.
6.
7.
8.
9.
Place the set with Aging Test for more than 15 minutes.
Receive the white 100% 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 (2) on the remote control to
select "AKB". The Fig. 2-3 appears on the display.
Press the channel button (2) on the remote control to
select the "R.BIAS".
Using the PLAY or STOP button on the remote control,
adjust the R.BIAS.
Press the CH. UP/DOWN button on the remote control
to select the "G.BIAS", "B.BIAS", "R.DRIVE", "G.DRIVE"
or "B.DRIVE".
Using the PLAY or STOP button on the remote control,
adjust the G.BIAS, B.BIAS, R.DRIVE or B.DRIVE.
Perform the above adjustments 7 and 8 until the white
color is looked like a white.
1. AKB AUTO
2. R.BIAS
3. G.BIAS
4. B.BIAS
5. R.DRIVE
6. G.DRIVE
7. B.DRIVE
8. AGC AUTO 0. RETURN
Fig. 2-3
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 PHASE
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 (1) on the remote control to
select "H/V". The Fig. 2-4 appears on the display.
Press the channel button (1) on the remote control to
select "H.PHASE".
Press the PLAY or STOP button on the remote control
until the right and left screen size of the vertical line
becomes the same.
1. H.PHASE
2. H.BLK
3. V.SIZE 50/60
4. V.POSI 50/60
5. V.LIN 50/60
6. V.SC 50/60
7. V.COMP
8. (H. FREQ) 0. RETURN
"The adjustment item 8 is not used for this model."
Fig. 2-4
"The adjustment items 1 and 8 is not used for this
model."