ViewSonic VCDTS23283 User manual

Model No. VCDTS23283
19” Digital Controlled Color Monitor
Service Manual
ViewSonic A91f+-1
ViewSonic
381 Brea Canyon Road, Walnut, California 91789 USA - [phone]
(A91f+-1_SM_830 Rev. 1a – Apr. 2004)

Copyright
Copyright
¤
2004by ViewSonic Corporation. All rights reserved. No partof this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise, without the prior written permission of ViewSonic Corporation.
Disclaimer
ViewSonic makes no representations or warranties, either expressed or implied, with respect to the
contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular
purpose. Further, ViewSonic reserves the right to revise this publication and to make changes from time
to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or
changes.
Revision History
Revision Date Description Of Changes Approval
1a 06/15/04 Initial Release DCN- 4408 Angela Lu
Trademarks
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Optiquest is a registered trademark of ViewSonic Corporation.
i
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

TABLE OF CONTENTS
2. Specification
3. Front Panel Function Control Description
4. Circuit Description
6. Trouble Shooting Flow Chart
9. Block Diagram,
Schematic Diagrams
7. Recommended Spare Parts List
1. Precautions and Safety Notices
5. Adjusting Procedure
8. Exploded Diagram And Spare Parts List
10. PCB Layout Diagrams
1
3
14
19
34
43
48
87
73-78
79
ii
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

WARNING!
This service information is designed for experience repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service
a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians.
Any attempt to service or repair the product or products dealt within this service information by anyone else
could result in serious injury or death.
1. CAUTION
Nomodificationof any circuitshouldbe attempted. Service work shouldonlybe performed afteryouare thoroughly
familiar withall ofthefollowingsafetychecks andservicingguide lines.
2. SAFETY CHECK
Care should be taken while servicing this CRTdisplaybecause of thehigh voltageused in the deflectioncircuits.
These voltagesare exposed in suchareas as the associated flybackandyoke circuits.
3. FIRE &SHOCK HAZARD
3-1Insert an isolationtransformerbetweentheCRTdisplayandACpower linebefore servicingthe chassis.
3-2In servicingpayattentionto originallead dress especiallyinthe highvoltage circuit. If a short circuit is found,
replace all parts whichhave been overheated as a result of the short circuit.
3-3Allthe protective devices munt be reinstalled per original design.
3-4Solderingmust beinspected for possible cold solderjoints, frayed leads, damagedinsulation, solder splashes or
sharp solder points. Be certain to remove all foreignmaterial.
4. LEAKAGE CURRENT COLD CHECK
4-1Unplug theACcord and connect a jumper between the twoprongson the plug.
4-2Turn the CRTdisplaypower switch “on”.
4-3Measure the resistance valuewith anohmmeter betweenthe jumpered ACplugandeach exposed metallic part
onthe CRTdisplaysuchas themetal frame, screwheads, control shafts, etc. When the exposed metallic part has
a return pathtothe chassis, the readingshouldbe 1.8 megohm minimum.
5. LEAKAGE CURRENT HOT CHECK
5-1PlugtheACcord directly into theACoutlet. Do not use an isolationtransformer duringthischeck.
5-2 Connect a 1500 ohm, 10 watt resistor, paralleled by a 0.15uF capacitor between each exposed metallic part and
a good earth ground (as shown in Fig.1).
5-3 Use an AC voltmeter with 1000 ohm/volt or more sensitivity and measure the AC voltage across the
combination 1500 ohm resistor and 0.15uF capacitor.
1. Precautions And Safety Noticess
1
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

5-4 Move the resistor connection to each exposed metallic part and measure the voltage.
5-5 Reverse the polarity of the AC plug in the AC outlet and repeat the above measurement.
5-6Voltagemeasured mustnot exceed 7.5 volt RMS, fromany exposed metallic part to ground A leakage current
tester maybe used inthe above hot check, in whichcase any currentmeasured mustnot exceed 5.0 milliamp. In
the case of a measurement exceeding the 5.0 milliamp value, a rework is required to eliminate the chance of
shock hazard.
Note：High voltage is present when this CRT display is operating. Always discharge the anode of the picture
tube to the display chassis to prevent shock hazard. AC VOLTMETER
TO
INSTRUMENT'S
EXPOSED
METAL PARTS 1500 Ω10W
0.15μF
Fig. 1
(EARTH
GROUND)
6. IMPLOSIONPROTECTION
Picture tubes are equipped with an integral implosion protection system, but care should be taken to avoid damage and
scratchingduringinstallation.Use only Panasonic replacement picture tubes.
7. X-RADIATION
WARNING：The only potential source of X-Radiation is the picture tube. However when the high voltage circuit is
operating properly there is no possibility of X-Radiation problem. The basic precaution which must be exercised is to
keep the high voltage at the following factory-recommended level.
Note：
：：
：It is important to use an accurate periodically calibrated high voltage meter.
7-1 The procedure for adjusting high voltage isshown on page 21.
7-2If can not be adjust 25.0 KV at immediate service isrequired topreventthe possibilityof premature
component failure.
7-3 To prevent X-Radiation possibility it is essential to use the specified picture tube.
IMPORTANT SAFETY NOTICE
There are special components used in this CRT displays
which are important for safety. These parts are identified
by the international symbol !ontheschematic
diagram and on the replacement parts list. It is essential
that these critical parts should be replaced with
manufacture’s specified parts to prevent X-RADIATION,
shock, fire, or other hazards. Do not modify the original
design or this will void the original parts and labor
guarantee.
2
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

GENERAL SPECIFICATION
1. SCOPE
1.1 THIS SPECIFICATIONDEFINES THE PERFORMANCE OF K986 SBM 19 INCH MULTISYNC
COLOR MONITOR
1.2PRODUCTCONFIGURATION
TBD
1.3MAGNETIC REQUIREMENTS
AMERICA (-M) BH = 250 + 10mG, BV = 450 + 10mG
2.INPUT REQUIREMENTS
2.1 AC POWER SUPPLY
2.1.1 POWER SOURCE 90~264VAC 50/60HZ
2.1.2 POWER CONSUMPTION LESS THAN 100W
2.1.3 INRUSH CURRENT LESS THAN 30AP. FOR 1/2 CYCLE AT 110V, LESS THAN 60 AP.
FOR ½ CYCLE AT 240V ON COLD STARTING
2.1.4 INPUT CURRENT 2.0 A MAX IN 110V
2.1.5 LEAKAGE CURRENT 3 mA AT AC 100V/240V
2.1.6 RIPPLE / NOISE SHOULD NOT CAUSE ANY VISIBLE INTERFERENCE
2.1.7 POWER CORD 1.8 METER
2.1.8 SIGNAL CABLE 1.8 METER,
2.2 VIDEO INTERFACE
2.2.1 RGB VIDEO ANALOG 0.7 VP-P AND 1 VP-P POSITIVE INPUT IMPEDANCE 75 OHM
2.2.2 MAX PC VIDEO SIGNAL 950mV WITH NO DAMAGE TO MONITOR
2.2.3 MAX MAC VIDEO SIGNAL 1250mV WITH NO DAMAGE TO MONITOR
2.2.4 SYNC SIGNAL SEPARATE OR COMPOSITE HORIZONTAL AND VERTICAL SYNC TTL LEVEL
2.2.5 INPUT CONNECTOR
15 PINS MINI “D” SUB
PIN NO. SIGNAL PIN NO. SIGNAL
1 RED 9 5V OUT
2 GREEN 10 5V GROUND
3 BLUE 11 GROUND
4 GROUND 12 SDA
5 CHECK SIGNAL 13 H. SYNC
6 R RETURN 14 V. SYNC
7 G RETURN 15 SCL
8 B RETURN
2.2.6 SIGNAL MEMORY MODES 13 PRESET MODES
2.2.7PLUG & PLAY VESA DDC1/2B
2. Specification
2.3 SCANNING FREQUENCY
2.3.1 HORIZONTAL 30 KHZ TO 86KHZ
2.3.2 VERTICAL 50 HZ TO 180 HZ
3
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

3. ADJUSTMENT CONTROL
3.1USER CONTROL
3.1.1 POWER SWITCH
3.1.2 OSD KEY
1 MENUBUTTON
2ENTER / SELECT BUTTON
DOWN/DECREASEBUTTON
UP/INCREASEBUTTON
3.2 OSD ADJUSTMENT FUNCTION
CONTRAST / BRIGHTNESS
ZOOM / H-POSITION / H-SIZE / V-POSITION / V-SIZE
PINCUSION / PINBALANCE /TRAPEZOID / PARALLELOGRAM / ROTATION
9300
OK / 6500OK / 5000OK USER R G B
LANGUAGES ENGLISH / DEUTSCH / FRANCAIS / ESPANOL / ITALIC
H-MOIRE/V-MOIRE
OSD H-POSITION / OSD V-POSITION
INPUT LEVEL
MANUALDEGAUSS
TOP/BOTTOMHOOK/RESETMEMORYRECALL
OSD
3.3 LED INDICATION
STATUS LED
NORMAL GREEN
POWER SAVING AMBER
POWER ON
OVER RANGE FREQUENCY AMBER
POWER OFF OFF
4
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

4. ELECTRICAL SPECIFICATION
A. ELECTRICAL SPECIFICATION
4.1 STANDARD CONDITION OF MEASUREMENT
4.1.1 BRIGHTNESS – 50% FACTORY SHIPMENT CONDITION
4.1.2 CONTRAST – 100% FACTORY SHIPMENT CONDITION MAX
4.1.3 OTHER SW – FACTORY SHIPMENT CONDITION
4.1.4 BACKGROUND COLOR – BLACK
4.1.5 BRIGHTNESS 30 FL FULL WHITE
4.1.6 TEMPERATURE 0~40 °C HUMIDITY 5 ~ 90% NON-CONDENSING
4.1.7 POWER INPUT –AC 90~264V 50HZ / 60HZ
4.1.8 TERRESTRIAL MAGNETIC FIELD – NORTHERN HEMISPHERE MAGNETIC FIELD
4.1.9 WARM UP TIME – START TESTING 30 MINUTES OR MORE AFTER POWER ON
4.1.10 TIMING CHART – REFER TO ITEM 7.2.
4.1.11 AMBIENT LIGHTING ENVIRONMENT – 400 TO 600 LUX
4.1.12 CRT FACE TO EAST
4.2 CRT SPECIFICATION
ITEM SPEC
SIZE 19”
DIAGONAL 18”
DEFLECTION 90°
PERSISTENCE MEDIUM SHORT
PHOSPHOR
PITCH 0.25mm
MASK TYPE SHADOW MASK FLAT
FACE PLATE ANTI- REFLECTIVE, ANTI-STATIC
CRT SDI/M46QCK761X214
LPD/M46QEF903X21
4.3 POWER SAVING
4.3.1 POWER SAVING
HORIZONTAL
SYNC. VERTICAL SYNC. POWER CONSUMPTION
OSD INDICATOR POWER
LED
RECOVERY TIME
YES YES < 100 W NORMAL GREEN N/A
NO YES < 5W POWER SAVING AMBER 10 SEC
YES NO < 5W POWER SAVING AMBER 10 SEC
NO NO < 5 W POWER SAVING AMBER 10 SEC
<29 KHZ OR
> 87KHZ
<49 HZ OR
>181 HZ
< 5W FREQUENCY OVER
RANGE AMBER 10 SEC
5
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

B. SCREEN CHARACTERISTICS
4.4 PICTURE DISPLAY SIZE
HORIZONTAL SIZE 352+4 mm
VERTICALSIZE 264+
4 mm
4.5 PICTURE CENTER
PRIMARY MODE (1280X1024/75HZ) LA-BL < 4 mm, LC-DL < 4 mm.
OTHERS MODE LA-BL < 4 mm, LC-DL < 4 mm.
4.6 LINEARITY
12 x 10
INPUT SIGNAL : BLOCK PATTERN
V-LINEARITY :
Xmax
Xmax
Ymax
Ymax
Xmin
Ymin
Ymin
Xmin X 100%
H-LINEARITY:
X 100%
+
-
+
-
< 4%
< 4%
; WORSE CASE < 5%
4.7 PICTURE DISTORTION
4.7.1 TRAPEZOID / PARALLELOGRAM
4.7.2 PINCUSHION / BARREL / PIN-BALANCE
PICTURE
2mm
268mm
357mm
TRAPEZOID:
HORIZONTAL <= 2mm
VERTICAL <= 2mm
PARALLEL <= 2mm
2mm
2mm
2mm
A
'
B
'
C'
PICTURE
PINCUSHION <
BARLEL < 1.5mm
C
6
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

4.7.3TILT
D
A B
PICTURE
A - B <= 2mm.
BEZEL
4.8 MISCONVERGENCE
4.9 FOCUS
4.9.1 UNDER THE CONDITION OF BRIGHTNESS CENTER AND CONTRAST MAXIMUM
“ ME “ PATTERN CAN BE SEEN CLEARLY BY USING THE 1280X1024 69 KHZ/85HZ IF
NECESSARY, LIMIT SAMPLE AGREED BY BOTH PARTIES WILL BE MADE FOR
FINAL FOCUS JUDGMENT.
4.10 JITTERS
4.10.1 NO VISIBLE
4.11 WHITE BALANCE
4.11.1 COLOR TEMPERATURE USING THE CIE COLOR TEMPERATURE COORDINATE
SYSTEM
COLOR 9300OK X = 0.283±0.015; Y = 0.297±0.015
COLOR 6500OK X = 0.313±0.020; Y = 0.329±0.020
COLOR 5000OK X = 0.346±0.020; Y = 0.359±0.020
PICTURE
357mm
268mm
ZONE A <= 0.25mm
ZONE B <= 0.30mm
B
ZONE C <= 0.35mm
C
A
4.11.2 COLOR PURITY IMPURITY SHOULD NOT APPEAR IN THE PATTERN OF ALL
GREEN ALL RED ALL BLUE OR ALL WHITE
4.11.3 COLOR TRACKING: WHEN THE FULL WHITE PATTERN IS DISPLAYED AT PRESET
(ONLY FOR 9300OK) CONDITION. THE DIFFERENCE OF WHITE BALANCE
BETWEEN CONTRAST 30 FL AND LOW CONTRAST 10 FL MUST BE LESS THAN
FOLLOWING VALUE
x AT CONTRAST 30 FL - x AT 25.75 FL < 0.005
y AT CONTRAST 30 FL - y AT 25.75 FL < 0.005
AND: x AT CONTRAST 25.75 FL - x AT 10 FL < 0.009
Y AT CONTRAST 25.75 FL - Y AT 10 FL < 0.009
4.11.4 VIDEO AMPLIFIER LINEARITY INPUT STEP AT 9300OK
x600mV–x700mV < 0.007
y 600mV – y 700mV < 0.003
7
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

4.12 LIGHT OUTPUT
AT 80 KHZ 1280X1024/75HZ MODE.
4.12.1 LL => AT BLACK PATTERN = 0.4 -1.2FL AT BRIGHTNESS 100%, CONTRAST 0%
FOR 9300OK
4.12.2 HL => AT WHITE BLOCK PATTERN = 37-43 FL AT BRIGHTNESS 50%, CONTRAST
100% FOR 9300OK
4.12.3 ABL => AT FULL-WHITE PATTERN 28-32 FL, BRIGHTNESS 50%, CONTRAST
100% FOR 9300OK
4.13 BRIGHTNESS UNIFORMITY
4.13.1 > 75% MAXIMUM BETWEEN CENTER TO ANY EIGHT POINTS WITHIN THE
DISPLAY PICTURE FULL WHITE PATTERN
4.14 SIZE REGULATION
4.14.1 STATIC REGULATION
PICTURE GROWTH FROM MINIMUM LIGHT OUTPUT TO MAXIMUM LIGHT OUTPUT
SHALL BE LESS THAN 3mm WHEN PICTURE IS EXCHANGED FROM
4.14.2 DYNAMIC REGULATION
PICTURE GROWTH SHALL BE LESS THAN 1 mmWHEN PICTURE IS EXCHANGED FROM
A
D
F
BC
E
HG
CENTER
PICTURE
BEZEL
BLACK WHITE
A
B
A'
B`
PICTURE
BEZEL
370mm
WHITE
BLACK100mm
100mm
< 1 mm
8
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

5. ENVIRONMENTAL CONDITIONS
5.1 TEMPERATURE AND HUMIDITY AT OPERATION 0 ~ 40 °C
5 – 95 % RH WITHOUT CONDENSATION
5.2 TEMPERATURE AND HUMIDITY AT STORAGE -40 ~60°C
10 – 95 % RH LESS THAN 6MONTH
5.3 VIBRATION TEST (PACKAGED)
FREQUENCY 5HZ –250 HZ – 5HZ
ACCELERATION 1.0G
SWEEP TIME 1 OCT/MIN.
TEST TIME 60MIN. / AXIS
5.4 DROP TEST (PACKAGED) 61 CM HEIGHT WEAK CORNER, 3 EDGES, 6 FACES, 1 TIME ON
EACH TESTED UNIT, 4 SETS MIN. DROP QTY.
5.5ALTITUDE
OPERATING 0~3000 METERS.
NON-OPERATING 0~12000 METERS.
6. PHYSICAL SPECIFICATION
6.1 DIMENSION
HEIGHT: 457 mm
WIDTH 445 mm
DEPTH 456 mm
MONITOR WEIGHT19.2 KG.
6.2 MECHANICAL ADJUSTMENT
TILT - 5/+15 DEGREES
SWIVEL
±90 DEGREES
6.3 PACKAGING
6.3.1CARTON DIMENSION
HEIGHT498mm
WIDTH 557 mm
DEPTH 577 mm
6.3.2 SHIPPING WEIGHT 22.4 KG
6.3.3 CONTAINER LOADING 320 UNITS WITH PALLET
9
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

7. FACTORY PRESET TIMINGS
7.1 TIMING DIAGRAM
TIMING OF INPUT SIGNALS NOMINAL INPUT LEVEL SPECIFICATION.
INPUT LEVEL
ANALOG VIDEO
RGB: 0.7V ±3db
SYNC: H.V. SEPARATE SYNC
TTL COMPATIBLE H.V. COMPOSITA SYNC
LOW(0) 0VMIN. 0.65VMAX.
HIGH (1) 2.40V MIN. 3.5V NOM. 5.5V MAX.
TIMING OF INPUT SIGNALS
A: H-TOTAL TIME O: V-TOTAL TIME
B: H-SYNC PULSE WIDTH P: V-SYNC PULSE WIDTH
C: H-BACK PORCH Q: V-BACK PROCH
D: H-DISPLAY TIME R: V-DISPLAY TIME
E: H-FRONT PORCH S: V-FRONT PORCH
VIDEO
C
D
E
B A
VIDEO
Q
R
S
P
O
VERTICAL
10
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

7.2 PRESET TIMING TABLE
PRESET TIMING TABLE
MODE NO. 1 2 3 4 5 6 7
MODE NAME
VGA
640X
480
VGA
640X
400
VGA
640X
480
VESA
800X
600
VESA
1024X
768
VESA
800X
600
VESA
1024X
768
HORIZONTAL DOTS 640 640 640 800 1024 800 1024
VERTICAL LINES 480 400 480 600 768 600 768
PIXEL CLOCK (MHZ) 25.175 25.175 36.00 49.5 65.000 56.25 78.75
HORIZONTAL FREQ (KHZ) 31.47 31.47 43.269 46.875 48.360 53.674 60.023
SYNC. POLARITY - - - + - + +
A H.TOTAL (US)
(PIXELS)
31.778
(800)
31.778
(800)
23.111
(832)
21.333
(1056)
20.680
(1344)
18.631
(1048)
16.660
(1312)
B H.SYNC (US)
(PIXELS)
3.813
(96)
3.813 (96) 1.556
(56)
1.616
(80)
2.09
(136)
1.183 (64) 1.129
(96)
C H.SYNC PORCH (US)
(PIXELS)
1.907
(48)
1.907 (48) 2.222
(80)
3.232
(160)
2.460
(160)
2.702 (152) 2.235
(176)
D H.ACTIVE (US)
(PIXELS)
25.422
(640)
25.422
(640)
17.778
(640)
16.162
(800)
15.75
(1024)
14.222
(800)
13.003
(1024)
E H.FRONT PORCH (US)
(PIXELS)
0.636
(16)
0.318 (8) 1.556
(56)
0.323
(16)
0.370
(24)
0 (0) 0.203
(16)
VERTICAL FREQ (HZ) 59.94 70 85.008 75.00 60.000 85 75.029
SYNC. POLARITY - + - + - + +
O V.TOTAL (MS)
(LINES)
16.684
(525)
14.268
(449)
11.764
(509)
13.333
(625)
16.670
(806)
11.756
(631)
13.328
(800)
P V.SYNC (MS)
(LINES)
0.064
(2)
0.064 (2) 0.069
(3)
0.064
(3)
0.12
(6)
0.056 (3) 0.050
(3)
Q V.BACK PORCH (MS)
(LINES)
1.048
(33)
1.112 (35) 0.578
(25)
0.448
(21)
0.600
(29)
0.503 (27) 0.466
(28)
R V.ACTIVE (MS)
(LINES)
15.254
(480)
12.711
(400)
11.093
(480)
12.800
(600)
15.880
(768)
11.179
(600)
12.795
(768)
S V.FRONT PORCH (MS)
(LINES)
0.318
(10)
0.222 (7) 0.023
(1)
0.021
(1)
0.06
(3)
0
(0)
0.017
(1)
SCANTYPE INTERLACED NO NO NO NO NO NO NO
11
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

PRESET TIMING TABLE (CONTINOUS)
MODE NO. 8 9 10 11 12 13
MODE NAME
VESA
1024X
768
VESA
1280X
1024
VESA
1600X
1200
MAC
640X
480
MAC
832X
624
MAC
1024X
768
HORIZONTAL DOTS 1024 1280 1600 640 832 1024
VERTICAL LINES 768 1024 1200 480 624 768
PIXEL CLOCK (MHZ) 94.5 135.00 162 30.240 57.270 80
HORIZONTAL FREQ (KHZ) 68.677 79.976 75.000 35.000 49.717 60.241
SYNC. POLARITY + ++−- −
A H.TOTAL (US)
(PIXELS)
14.561
(1376)
12.504
(1688)
13.333
(2160)
28.571
(864)
20.115
(1152)
16.600
(1328)
B H.SYNC (US)
(PIXELS)
1.016 (96) 1.067
(144)
1.185
(192)
2.116
(64)
1.118 (64) 1.200
(96)
C H.SYNC PORCH (US)
(PIXELS)
2.201 (208) 1.837
(248)
1.877
(304)
3.175
(96)
3.911 (224) 2.20
(176)
D H.ACTIVE (US)
(PIXELS)
10.836
(1024)
9.481
(1280)
9.877
(1600)
21.164
(640)
14.528 (832) 12.8
(1024)
E H.FRONT PORCH (US)
(PIXELS)
0 (0) 0.119
(16)
0.395
(64)
2.116
(64)
0 (0) 0.4
(32)
VERTICAL FREQ (HZ) 85 75.025 60.00 66.667 74.55 74.927
SYNC. POLARITY + ++−- −
O V.TOTAL (MS)
(LINES)
11.765 (808) 13.329
(1066)
16.667
(1250)
15.000
(525)
13.417 (667) 13.346
(804)
P V.SYNC (MS)
(LINES)
0.044 (3) 0.038
(3)
0.04
(3)
0.086
(3)
0.060 (3) 0.050
(3)
Q V.BACK PORCH (MS)
(LINES)
0.524 (36) 0.475
(38)
0.613
(46)
1.114
(39)
0.784 (39) 0.498
(30)
R V.ACTIVE (MS)
(LINES)
11.183 (768) 12.804
(1024)
16.000
(1200)
13.714
(480)
12.552 (624) 12.749
(768)
S V.FRONT PORCH (MS)
(LINES)
0 (0) 0.013
(1)
0.013
(1)
0.086
(3)
0(0) 0.05
(3)
SCANTYPE INTERLACED NO NO NO NO NO NO
12
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

EDID DATA for SAMSUNG CRT:
TIME: 09:20:50
DATE: FEB12,2004
VIEWSONICCORPORATION
EDIDVERSION#1, REVISION#3
DDCTESTFOR:VIEWSONICA91F+
128 BYTES OF EDID CODE FOR SAMSUNG CRT
_____________________________________________________
0 1 2 3 4 5 6 7 8 9
________________________________________
0 | 00 FF FF FF FF FF FF 00 5A 63
10| 199E01010101010E0103
20 | 1D 24 1B BE 2A BB B8 A3 52 46
30 | 98 24 0F 48 4C FF FF 80 81 80
40 | C1 40 A9 40 81 40 71 4F 61 59
50 | 45 59 31 59 BC 34 00 98 51 00
60 | 2A 40 10 90 13 00 60 08 11 00
70 | 00 1E 00 00 00 FF 00 50 35 31
80 | 30 34 30 31 30 30 30 30 31 0A
90 | 00 00 00 FD 00 32 B4 1E 56 14
100| 000A2020202020200000
110 | 00 FC 00 41 39 31 66 2B 0A 20
120| 2020202020200005
___________________ _______________________________
EDIDDATAfor LG CRT:
TIME: 09:45:14
DATE: FEB12,2004
VIEWSONIC CORPORATION
EDIDVERSION#1, REVISION#3
DDCTEST FOR: VIEWSONIC A91F+
128 BYTES OF EDID CODE FOR LG CRT
_____________________________________________________
0 1 2 3 4 5 6 7 8 9
________________________________________
0 |00 FF FF FF FF FF FF 00 5A63
10 | 19 9E 01 01 01 01 01 0E 01 03
20 | 1D 24 1B CE 2A 05 78 A0 56 4A
30 | 99 26 12 48 4C FF FF 80 81 80
40 | C1 40 A9 40 81 40 71 4F 61 59
50 | 45 59 31 59 BC 34 00 98 51 00
60 | 2A 40 10 90 13 00 60 08 11 00
70 | 00 1E 00 00 00 FF 00 50 35 31
80 | 30 34 30 31 30 30 30 30 31 0A
90 | 00 00 00 FD 00 32 B4 1E 56 14
100 | 00 0A 20 20 20 20 20 20 00 00
110 | 00 FC 00 41 39 31 66 2B 0A 20
120 | 20 20 20 20 20 20 00 E0
____
______
___________________ _______________________________
13
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

Control function﹒
A﹒User control﹒
B﹒OSD function control﹒
1 2
3. Front Panel Function Control Description
A﹒User control﹒
Power switch：Soft power control﹒
Function select button：, ﹒
Adjustment control button：▽﹑△﹒
Control name﹒
1﹒Power switch：Push-on / push-off switch for soft power control﹒
2
﹒LED indication﹒
Status LED
Power on Green
Off mode in 5 sec Orange
Over range freq. Orange
Power off Off
12
14
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

3
﹒Function select button：
Press the ‘ ’ button to display OSD menu﹒
Press the ‘▽﹑△’ button to select menu function or sub-function﹒
Press the ‘ ’ button to enter the select function﹒
4﹒Adjustment control button：
Push the increased ‘△’ or decrease ‘▽’ button for the desired adjustment﹐all adjustment are memorized
automatically immediately﹒
Function select buttons
Adjustment control buttons
Power switcha.
b.
c.
d.
Power-ON indication
12
1
2
B. OSD (on screen display) function control method.
. Main menu, Part 1.
1. Contrast / Brightness.
2. H. size / Position.
3. V. size / Position.
4. Pincushion / Balance.
5. Trapezoid / Parallel.
6. Top/Bttom Hook.
7. ZOOM
8. Tilt
. Main menu, Part 2.
9. Degauss
10. H/V Moire.
11. OSD Position.
12. Input Level.
13. View match color.
14. Language.
15. View meter.
16. Memory Recall.
15
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

OSD function control :
Main menu, part1
Note
：Press button to toggle between
all Controls that appear in pairs on the
Main menu1.
Contrast adjusts the foreground white level of the screen image.
decreases contrast, increases contrast.
Brightness adjusts the background brightness of the screen image.
decreases brightness, increases brightness.
HORIZONTAL SIZE adjusts the width of the screen image.
decreases width of screen image, increases width of screen image.
HORIZONTAL POSITION moves the screen image left or right.
moves the screen image left, moves the screen image right.
VERTICAL SIZE adjusts the height of the screen image.
decreases the screen height, increases the screen height.
VERTICAL POSITION moves the screen image up and down.
moves the screen image down, moves the screen image up.
PINCUSHION straightens the vertical sides of the screen image by curving them inward or out ward.
curves the vertical edges inward, curves the vertical edges outward.
PIN BALANCE straightens the vertical sides of the screen image by curving them to the right or to the left.
scurves thevertical edges to theleft, curves thevertical edges to theright.
TRAPEZOID make vertical sides of the screen image parallel.
narrows the top and widens the bottom, widens the top and narrows the bottom.
PARALLEL (parallelogram) slants vertical edges of the screen to the left or right.
slants vertical edges to left, slants vertical edges to right.
2
MA I N ME NU 1
CONTRAST / BR I GHTNESS
H.SIZE/POSITION
V.SIZE/POSITION
P I NCUSH I ON / BALANCE
TRAPEZO I D / PARALLEL
TOP / BOT TOM HOOK
ZOOM
TILT
EX I T : 1 SELECT :2
16
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1

TOP HOOK
Straightens the top corners of the screen image. [▽] or [△] to adjust.
BOTTOM HOOK
Straightens the bottom corners of the screen image. [▽] or [△] to adjust.
ZOOM CONTROL
to diminish H-Size
＆V-Size, △to enlarge H-Size ＆V-Size.
TILT
rotates the entire screen image.
rotates the screen counter-clockwise, rotates the screen clockwise.
Main menu, part12
MA I N MENU 2
DEGAUSS
H/V MOIRE
OSD POS I T I ON
I NPUT LEVEL
VIEWMATCH COLOR
LANGUAGE
VIEWMETER
MEMORY RECAL L
EX I T : 1 SELECT : 2
OSD OSD
?
DEGAUSS manual degauss function.
Press button to active manual degauss function.
HMOIRE reduces vertical interference that causes unwanted color textures or patterns.
Press
▽or △to adjust.
V MOIRE reduces horizontal interference patterns that causes unwanted color textures or patterns.
Press
▽or △to adjust.
OSD H-Position control
Press the
▽, △button.
▽move OSD to left side, △move OSD to right side﹒
OSD V-Position control
Press the
▽, △button.
△move OSD to up, ▽move OSD to down.
INPUT LEVEL displays the voltage level of the video signal.
2
OSD
OSD
17
ViewSonic CorporationConfidential
-
Do Not Copy A91f+-1