Acer AC711 Diagram
1. DISPLAY ALIGNMENT ..................................................................................2
A. TIMING & DISPLAY SIZE ................................................................................................................ 2
B. PICTURE POSITION....................................................................................................................... 2
C. LINEARITY ..................................................................................................................................... 2
D. ALIGNMENT PROCEDURE............................................................................................................. 2
E. GEOMETRIC DISTORTION............................................................................................................. 3
F. WHITE BALANCE ALIGNMENT....................................................................................................... 4
2. CONTROL AND CONNECT LAYOUT ..........................................................7
A. MAIN PCB ...................................................................................................................................... 8
C. PIN ASSIGNMENT.........................................................................................................................10
3. INTRODUCTION:.........................................................................................11
A. POWER SUPPLY ........................................................................................................................... 11
B. DEFLECTION: ............................................................................................................................... 11
C. VIDEO:.......................................................................................................................................... 11
D. DIGITAL CONTROLLOR: ............................................................................................................... 11
4. POWER SUPPLY .........................................................................................12
A. RECTIFIER AND FILTER CKT: ........................................................................................................15
B. FLYBACK AND PWM CKT :............................................................................................................15
C. SNUBBER CKT: .............................................................................................................................15
D. SYNCHRONIZED CKT: ..................................................................................................................15
E. POWER SAVING CKT: ...................................................................................................................15
F. DEGAUSS CKT: .............................................................................................................................16
G. OVERLOAD PROTECTION CKT: ....................................................................................................16
5. DEFLECTION...............................................................................................14
A. SYNC RPOCESSOR: .....................................................................................................................17
B. HORIZONTAL PROCESSOR ..........................................................................................................17
C. VERTICAL OUTPUT......................................................................................................................17
D. HORIZONTAL OUTPUT STAGE .....................................................................................................17
E. FLYBLACK TRANSFORMER..........................................................................................................17
6. VIDEO AMP. CIRCUIT .................................................................................17
A. VIDEO PRE. AMP. ..........................................................................................................................20
B. VIDEO AMPLIFIER.........................................................................................................................20
7. TROUBLESHOOTING.................................................................................19
A. POWER SUPPLY CHECK ..............................................................................................................22
B. MONITOR CHECK FLOW CHART ..................................................................................................23
APPENDIX A: PART LIST .............................................................................23
APPENDIX B: P. C. B. ASSEMBLY ..............................................................73
APPENDIX C: DISPLAY UNIT ASSEMBLY ...............................................108
APPENDIX D: CRT & YOKE ASSEMBLY ..................................................122
1
1. DISPLAY ALIGNMENT
A. TIMING & DISPLAY SIZE
For all presetting mode shall be within the limitation:
H. WIDTH 310 ± 5mm
V. HEIGHT 232 ± 3 mm
The external control range of the data area, shall be as follows;
Max. horizontal size : full the screen
Max. vertical size : full the screen
B. PICTURE POSITION
For all presetting mode shall be within the limitation:
H.PHASE SCREEN CENTER ± 4 mm
V.CENTER SCREEN CENTER ± 3 mm
C. LINEARITY
The linearity of an image displayed on the CRT must meet the following requirements, with reference to figure
4.05 for both X and Y and axis.
The measured value of linearity shall be less than 6%(p) or 8%(s) when calculated using all lattices and shall be
less than 5%(p) or 6%(s) when calculated using adjcent lattices.
Xmax-Xmin OR Ymax-Ymin
Xmax+Xmin Ymax+Ymin
Where: Xmax,Xmin,be Calculated Same Line
Ymax,Ymin,be Calculated Same Row
D. ALIGNMENT PROCEDURE
• Warm up the monitor for at least 30 minutes before adjustment.
• Set the front of CRT to the east.
• Turn all VR set to center position.
D-1. H.V
1. Use front control key adjust the display size about 300mm, adjust VR801 Let the Plus of C824 is
28.14V in Timing 68kmode FULL WHITE PATTERN, it can be got a stable H.V.
2
E. GEOMETRIC DISTORTION
b
a1b1c1
d1
a2b2c2
d2
b
a
b
E-1 Raster Rotation
Signal No.1 to 6
| a - b | ≤ 2.0 mm
E-2 Pincushion
Signal No.1 to 6
Top : d1 ≤ 2.0 mm
Bottom : b1 ≤ 2.0 mm
Leftside : a1 ≤ 1.5 mm
Rightside : c1 ≤ 1.5 mm
E-3 Barrel
Signal No.1 to 6
Top : d2 ≤ 2.0 mm
Bottom : b2 ≤ 2.0 mm
Leftside : a2 ≤ 1.0 mm
Rightside : c2 ≤ 1.0 mm
a
Bezel
E-4 Trapezoid
Signal No.1 to 6
Top : d ≤ 2.5 mm
Bottom : b ≤ 2.5 mm
Leftside : a ≤ 2.5 mm
Rightside : c ≤ 2.5 mm
E-5 . Parallelogram
Signal No.1 t o 6
a ≤ 0.5 degree
E-6 Overall Distortion
Signal No.6 only
Top : d ≤ 2.5 mm
Bottom : b ≤ 2.5 mm
Leftside : a ≤ 2.5 mm
Rightside : c ≤ 2.5 mm
d
a
c
d
a
c
3
F. WHITE BALANCE ALIGNMENT
F.1.1 Select timing #6 (VESA 68K 1024X768) with crosshatch pattern, adjust both horizontal and vertical
OSD’s size control to get display size within 310x232p±2mm.
F.1.2 Disconnect R.G.B. signal inputs, adjust OSD’s brightness and G1 control to it’s maximum position.
F.1.3 Auto alignment(P103 must be short)
Use automatic alignment equipment and program to get color temperature within specified
coordinates.
F.1.4 Manual alignment
P103 must be short in order to into factory mode. Select OSD function to color temperature
adjustment.
F.1.5 For 9300( 7500 ; 6500 ) color coordinate ( notes: set the minimum value of R.G.B. bias is 0,
set the value of sub -contrast “SC” is 0 ).
F.1.6 Disable the video pattern( for a raster pattern ), set the maximum value of contrast and
brightness is 255, adjust G1 to Y=0.01 cd/mm
F.1.7 Adjust bias G to get Y=1.8 ± 0.06 cd/mm
Adjust bias B to get y=297 ( y=315 for 7500 ; y=329 for 6500 ) ± 5
Adjust bias R to get x=283 ( x=295 for 7500 ; x= 313 for 6500 ) ± 3
F.1.8 Fine tune the bias G and R for x=283 , y=297 ( x=299, y=315 for 7500; x=313, y=329 for
6500 ) ± 3.
F.1.9 Select 7500 and 6500 color coordinate separately. Repeat item 2.5.5 ~ 2.5.8 to
meet specificity.
F.1.10 Adjust brightness control to get raster is <= 0.25cd/mm, change pattern to 2 inch square.
F.1.11 Enable G signal output of pattern generator, adjust gain G to get Y=98 ± 1 cd/mm
F.1.12 Enable B signal output, adjust gain B to get y=297 ( y=315 for 7500 ; y=329 for 6500 ) ± 2
Enable B signal output, adjust gain R to get x=283 ( x=299 for 7500 ; x=313 for 6500 ) ± 1
4
F.1.13 Fine tune the gain G and R for x=283 , y=297
( x=299, y=315 for 7500; x=313, y=329, for 6500 ) ± 2
F.1.14 Check 150 >Y> 130 cd/mm, if not , adjust G to get Y>130 cd/mm, then repeat item 2.5.12
F.1.15 Change pattern to fall white, adjust SB to get 92< Y <113 cd/mm .
F.1.16 Select 7500 and 6500 color coordinate separately. Repeat item 2.5.11 ~ 2.5.15 to meet
specificity.
7500 X=300 Y=315
6500 X=313 Y=329
5
G. PRESET TIMING
Fh
Fv
Tv
Hs
Vs 1
Preset Timing Chart
[ H -SYNC ]
Tsh
[ VIDEO ]
[ V -SYNC ]
Tsv
[ VIDEO ]
Th
Tdh
Tbh
Tfh
Tbv
Tv
Tdv
Tfv
No
Signal Name Clock
VGA
640*480(60)
VESA
2
800*600(85)
VESA
3
1024*768(85)
VESA
4
800*600(75)
VESA
5
1024*768(75)
VESA
6
1280*1024(60)
(MHz)
(kHz)
(Hz)
25.175 31.469 59.940
56.250 53.674 85.061
94.500 68.677 84.997
49.500 46.875 75.000
78.750 60.023 75.029
108.00 63.981 60.020
Th
(uSec)
(dot)
31.778
(800)
18.631
(1048)
14.561
(1376)
21.333
(1056)
16.66
(1312)
15.630
(1688)
Tsh
(uSec)
(dot)
3.813
(96)
1.138
(64)
1.016
(96)
1.616
(80)
1.219
(96)
1.037
(112)
Tfh
(uSec)
(dot)
0.636
(16)
1.138
(64)
0.508
(48)
0.323
(16)
0.203
(16)
0.444
(48)
Tbh
(uSec)
(dot)
1.907
(48)
2.702
(152)
2.201
(208)
3.232
(160)
2.235
(176)
2.296
(248)
Tdh
(uSec)
(dot)
25.422
(640)
14.222
(800)
10.836
(1024)
16.162
(800)
13.003
(1024)
11.852
(1280)
(mSec)
(line)
16.683
(525)
11.756
(631)
11.765
(808)
13.333
(625)
13.328
(800)
16.661
(1066)
Tsv
(mSec)
(line)
0.064
(2)
0.056
(3)
0.044
(3)
0.064
(3)
0.050
(3)
0.047
(3)
Tfv
(mSec)
(line)
0.318
(10)
0.019
(1)
0.015
(1)
0.021
(1)
0.017
(1)
0.016
(1)
Tbv
(mSec)
(line)
1.049
(33)
0.503
(27)
0.524
(36)
0.448
(21)
0.466
(28)
0.594
(38)
Tdv
(mSec)
(line)
15.253
(480)
11.179
(600)
11.183
(768)
12.800
(600)
12.795
(768)
16.005
(1024)
- -
+ +
+ +
+ +
+ +
+ +
6
2. CONTROL AND CONNECT LAYOUT
7
A. Main PCB
8
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