LG 710E Service Manual

							$GMXVWPHQWRI:KLWH%DODQFH
$IWHU ILQLVKLQJ DGMXVWPHQW RI FXW RII EDFN UDVWHU
DSSURYH&RORU)XOOZKLWHSDWWHUQ
$GMXVW%59DWD 6&21 

[
\

$SSURYH:LQGRZSDWWHUQ[PPWRDGMXVW
6&21WR
						

							- 12-
3.Adjustment Using Service software Program(Adjustment Program)
1. Adjustment for Factory Mode (Preset Mode).
1)Display cross hatch pattern at Mode All.
2)Run alignment program for 710BM/773NM on the IBM compatible PC.
3) EEPROM → ALL CLEAR → Y(Yes) command. 
 Do not run this procedure unless the
EEPROM is changed. All data in EEPROM (mode  data and color data) will be erased.
4) COMMAND → PRESET START  → Y(Yes)
command.
5) DIST. ADJ. → FOS. ADJ command. 
6) Adjust H-POSITION as arrow keys to center of the screen.
7) Adjust H-SIZE as arrow keys to 310 ± 2mm.
8) Adjust V-POSITION as arrow keys to center of the screen.
9) Adjust V-SIZE as arrow keys to 230 ± 2mm.
10) Adjust TRAPEZOID as arrow keys to be the best condition.
11) Adjust SIDE PINCUSHON as arrow keys to be the best condition.
12) Adjust TILT as arrow keys to be the best condition.
13) Display cross hatch pattern at Mode 4.
14) DIST. ADJ. → BALANCE DATA  command.
15) Adjust balance of Pin-Balance as arrow keys to be the best condition. 
16) Adjust parallelogram as arrow keys to be the best condition.
17) Save of the Mode.
18) Save of the System.
19) Display from Mode 4 and repeat above from number 6) to 16).
20) COMMAND → PRESET EXIT → Y (Yes) command. 2. Adjustment for White Balance and Luminance.
1) Set the White Balance Meter.
2) Press the DEGAUSSING on the OSD menu for demagnetization of the CDT.
3) Display color 0,0 pattern at Mode 4.
4) COMMAND  → PRESET START  → Y(Yes)
command.
5) Set Bightness and Contrast to max position.
6) COLOR ADJ. → LUMINANCE command of the
alignment program.
7) COLOR ADJ. → BIAS ADJ. command of the
alignment program.
8) Check whether blue color or not at R-BIAS and G- BIAS to min position, Sub-Brightness to 205
(CD(h))position, B-Bias to 127(7F(h))position. If it's not
blue color, the monitor must repair.
9) Adjust Screen control on the FBT to 0.4 ± 0.05FL of the raster luminance. 
10) Adjust R-BIAS and G-BIAS command to x=0.283 ± 0.006 and y=0.298 ± 0.006 on the White Balance
Meter with PC arrow keys.
11) Display color 15,0 Full White(70x70mm) at mode 4.
12) DRIVE ADJ command.
13) Set B-DRIVE to 90(5A(h)) at DRIVE of the alignment program.
14) Adjust R-DRIVE and G-DRIVE command to white balance x=0.283 ± 0.003 and y=0.298 ± 0.003 onthe White Balance Meter with PC arrow keys.
15) Adjust SUB-CONTRAST command to 50±1FL of the raster luminance.
15) Display color 15,0 full white patten at Mode 4.
16) COLOR ADJ.  → LUMINANCE → ABL command.
17) Adjust ABL to 32 ± 1FL of the luminance.
18) Exit from the program. 
						

							1R ,WHP &RQWHQW :øDWD
 0DQXIDFWXUHU,  *60( 
 3URGXFW,  $


						

							(,$7$(,71M
1RNM,Â
 Û/
 E¯
DB

 0DQXIDFWXUHU, *60 (
 3URGXFW,  ()

						

							WIRING DIAGRAM
-15-
P501(option)
P301 P302
G2P702P701
T1 P402
P902 S+
S
Signal
Cable AC
Socket
FBT 
						

							BLOCK DIAGRAM
 
W
X
S
Q
,

U
H
Z
R
3
&
$
9



a




]
+





H
Q
L
/
U
H
W
O
L
)
J
Q
L
V
V
X
D
J
H

W
L
X
F
U
L
&
@

O
R
U
W
Q
R
&


6
2

>
6
3
0
6
O
R
U
W
Q
R
&





&
,

7
/
,
7
O
R
U
W
Q
R
&
W
L
X
F
U
L
&
9



9


(
0
2
5
3




&
,

9

F
Q
\
6

+
F
Q
\
6

9
,


$

6

$
7
$


&
,


/
&
6

.
&
2
/
&

&
2
(

,
9



3
0
$

H
U
3

6
2




&
,

R
H
G
L
9
O
D
Q
J
L
6 5
* %
2
(

,
9
3
0
$

Q
L
D
0




&
,

U
R
V
V
H
F
R
U
3

F
Q
\
6

9

+

	

0
2
&
,
0





&
,






$
$
6
W
X
2

9




&
,


-




$

7W
X
2

+




4

\
W
L
U
D
H
Q
L
/

+
Q
R
L
W
F
H
U
U
R
&<
$
5

;
Q
R
L
W
F
H
W
R
U
3

W
L
X
F
U
L
&
F
L
P
D
Q
\

6
8
&
2
)
W
L
X
F
U
L
&
O
R
U
W
Q
R
&

V
V
H
Q
W
K
J
L
U
%
9




9


9





N
F
D
%

G
H
H
)
9


$

6



/
&
6
F
Q
\
6

9

F
Q
\
6

+

O
D
Q
J
L
6

O
R
U
W
Q
R
&

0
:
3
9


9

 7

&
<



9






U
H
W
D
H
+
,
&
6FUHHQ
9

+

H
Y
L
U



+
H
Y
L
U


%

%
9


0
3

O
R
U
W
Q
R
&

W
L
X
F
U
L
&
9

9



9



9

H
J
D
W
O
R
9
N
F
D
E
G
H
H
I
J
Q
L
V
V
X
D
J
H

O
L
R
&
\QDPLF)RFXV
6WDWLF)RFXV
7
/
,
7
O
L
R
&
9

9

9


* 
*
R
W
X
$
P
D
H
%
W
L
P
L
/
U
H
W
U
H
Y
Q
R
&

&


&

7
%
)





7


Q
R
L
W
D
O
X
J
H
5
W
L
X
F
U
L
&
9


6
3
0
6




7


9

6
6
(
1
7
+
*
,
5
%
7
6
$
5
7
1
2
&

(
5
,
2
0
*
1
,
6
6
8
$
*
(

1
2
,
7
,
6
2
3

9



+
(
=
,
6

9



+
&
&
3
6

,
2
=
(
3
$
5
7
(
&
1
$
/
$
%

1
,
3
0
$
5
*
2
/
(
/
/
$
5
$
3

W
O
L
7


1
2
,
7
$
7
2
5
7
(
6
(
5



/
/
$
&
(
5
5
2
/
2
&
1
2
,
7
$
0
5
2
)
1
,
(
*
$
8
*
1
$
/
(
0
,
7


6
2
5
(
1
5
2
&

0
2
7
7
2
%

3
2
7
/
(
9
(
/

2
(

,
9
.
&
2
/

/
2
5
7
1
2
&


6
2
%*5
V
DL%
HYLU+ 
						

							(6&5,37,212)%/2&.,$*5$0
 
3-033WITCHING-ODE0OWER3UPPLY	
7HENYOUTURNONTHEPOWERSWITCHTHEOPERATING
PROCEDUREISASFOLLOWS
	4HE!#LINEVOLTAGEISRECTIFIEDBYTHEBRIDGEDIODE
$
	4HECONTROL)#)#	STARTSSWITCHINGANDGENERATES
SWITCHPULSEINTHEPRIMARYTURNOFTHE3-03
TRANSFORMER4	
	4HESWITCHINGPULSESOFTHEPRIMARYTURNSAREINDUCED
TOTHESECONDARYTURNSOFTHETRANSFORMERBYTHETURN
RATIO4HISPULSESARERECTIFIEDBYEACHDIODE$
$$	$$$	
	%ACHRECTIFIED$#VOLTAGE6666
AND6	
   / VE R 6 OLT A GE  0 RO TE CTIO N # I R CUIT
7HENTHEINPUTOF)#6IN PIN	ISMORETHAN
6ALLTHESECONDARYVOLTAGESOFTHE3-03
TRANSFORMER4	DOWNTOLOWVALUE
$ISPLAY0OWER-ANAGEMENT#IRCUIT$0-	
	34!.$
93530%.$-ODE
7HENNOINPUTOFHORIZONTALORVERTICALSYNC1
1ARETURNEDOFFAND11ARETURNEDOFF
4HENINPUTPOWERCONSUMPTIONISBELOWWATTS
	/&&-ODE
7HENNOINPUTOFHORIZONTALANDVERTICALSYNC1
1ARETURNEDOFFAND11ARETURNEDOFF
4HENINPUTPOWERCONSUMPTIONISBELOWWATTS8
2!90ROTECTION#IRCUIT
7HENTHEHIGH6OLTAGEREACHESTOK6INANABNORMAL
CASETHEHIGHVOLTAGEDETECTORCIRCUIT2$#

2#STARTOPERATIONTOSHUTDOWNHIGHVOLTAGE
CIRCUIT
-ICROPROCE SSOR#ONTROL(ORIZONTALAND
6ERTICAL3YNC0ROCESSOR#IRCUIT
4HEOPERATINGPROCEDUREISASFOLLOWS
	4HEREIS(ORIZONTAL6ERTICALPROCESSFUNCTIONIN
-ICROPROCESSOR)#	
	-ICROPROCESSOR)#	DISCRIMINATESTHEOPERATING
MODEFROMTHESYNCPOLARITYANDRESOLUTION
	!FTERMICROPROCESSORREADSTHESEADJUSTEDMODEDATA
STOREDAT%%02/-ITCONTROLSOPERATINGMODEDATA
THROUGH))#
	5SERSCANCONTROLSCREENCONDITIONBYTHE/3$3ELECT
5P$OWN,EFT2IGHT%XIT
	4HEHORIZONTALANDVERTICALSYNCPROCESSOR)#)#	
HASASYNCDETECTORASAW
TOOTHGENERATORANDDRIVE
FUNCTION!NDOUTPUTSHORIZONTALANDVERTICALDRIVE
SIGNALTOCONTROLSCREENDISTORTIONS$$#ONVERTER#IRCUIT
4OOBTAINCONSTANTHIGHVOLTAGETHISCIRCUITSUPPLIES
CONTROLLED$#VOLTAGEFOR&4ANDHORIZONTALDEFLECTION
CIRCUITACCORDINGTOTHEHORIZONTALSYNCFREQUENCY
(ORIZONTAL3
CORRECTION#IRCUIT
4HISCIRCUITCORRECTSTHEHORIZONTALLINEARITYFOREACH
HORIZONTALSYNCFREQUENCY
(ORIZONTALDRIVEAND/UTPUT#IRCUIT
4HISCIRCUITISAHORIZONTALDEFLECTIONAMPLIFIERFORRASTER
SCAN
!,#IRCUIT
4HISCIRCUITLIMITSTHEBEAM
CURRENTFORTHERELIABILITYOF
#$4
6ERTICAL/UTPUT#IRCUIT
4HISCIRCUITTAKESTHEVERTICALRAMPWAVEFROMTHE
4$!*)#	ANDPERFORMTHEVERTICALDEFLECTION
BYSUPPLYINGTHESAW
TOOTHWAVECURRENTTOTHEVERTICAL
DEFLECTIONYOKE
LANKINGANDRIGHTNESS#ONTROL#IRCUIT
LANKINGCIRCUITELIMINATESTHERETRACELINEBY
SUPPLYINGANEGATIVEPULSEWAVETOTHEOFTHE#$4
RIGHTNESSCONTROLCIRCUITISUSEDFORCONTROLOFTHE
SCREENBRIGHTNESSBYCHANGINGTHE$#LEVEL

/3$/N3CREEN$ISPLAY	#IRCUIT
4HISCIRCUITDISPLAYSINFORMATIONOFTHEMONITOR{SSTATUS
ONTHESCREEN )MAGE2OTATION4ILT	#IRCUIT
4HISCIRCUITCORRECTSTHETILTOFTHESCREENBY
SUPPLYINGTHEIMAGEROTATIONSIGNALTOTHETILTCOIL
WHICHISATTACHEDNEARTHEDEFLECTIONYOKEOFTHE
#$4 
						

							 
6IDEO0RE
!MP#IRCUIT
4HISCIRCUITAMPLIFIESTHEANALOGVIDEOSIGNALFROM
^6TO^6)TISOPERATEDBYTAKINGTHECLAMP
2DRIVEANDCONTRASTSIGNALFROMTHE-)#/-
)#	
6IDEO/UTPUT!MP#IRCUIT
4HISCIRCUITAMPLIFIESTHEVIDEOSIGNALWHICHCOMES
FROMTHEVIDEOPRE
AMPCIRCUITANDAMPLIFIEDITTO
APPLIEDTHE#$4CATHODE 6IDEO0ROCESSOR#IRCUIT
6IDEOPROCESSORCIRCUITCONSISTSOFTHEVIDEODRIVE
OUTPUTBLOCK4HEVIDEODRIVE)#)#	RECEIVESTHE
VIDEOSIGNALFROM0#4HEGAINOFEACHCHANNELIS
CONTROLLEDBY-)#/-THROUGH))#
4HECUT
OFFCIRCUITCOMPENSATEDIFFERENTVOLTAGEOF
EACHCHANNELBETWEENTHECATHODEANDTHEOFTHE
#$4 
						

							
&+(&.
%5,*(,2(
&+(&.
&92/7$*(
9&DW9LQSXW
9&DW9LQSXW
,&4
&+(&.


&+(&.
)86(2.)
 
7528%/(6+227,1**8,(
1232:(5
1232:(5
32:(5,1,&$7252))
12
12
12
12
7528%/(,1
4444
7528%/(
,1)86()
60366ZLWFK212))
:DYHIRUPV
7528%/(,1
%5,*(,2(
7528%/(,1
,&4
7528%/(,1



						

							
12&+$5$&7(5
12&+$5$&7(5
12
12
12
12
7528%/(,1
&762&.(7
7528%/(,1
36,*1$/&$%/(
3&6,*1$/
7528%/(,1
,&3
7528%/(,1
,&
7528%/(,1
,&3