ViewSonic VX500 Service Manual - Page 8

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Default Input Connector Video Cable Strain Relief Video Cable Connector DB-15 Pinout Video Signals Video Impedance Maximum PC Video Signal Maximum Mac Video Signal Sync Signals DDC 1/2B Sync Compatibility Video Compatibility Resolution Compatibility Exclusions Defaults to the first detected input Equal to twice the weight of the monitor for five minutes. Compliant with IBM 8513 & DDC 1/2B. 1. Video RGB (Analog) Separate, Composite, or Sync on Green 2. TMDS (Digital) 75 Ohms (Analog), 100 Ohms (Digital) 950 mV with no damage to monitor 1250 mV with no damage to monitor TTL Compliant with Revision 1.0 Separate Sync, Composite Sync, SOG Shall be compatible with all PC type computers, Macintosh computers, and after market video cards. 640 x 350, 640x400, 640 x 480, 720 x 400, 800 x 600, and 1024 x 768 Not compatible with interlaced video. TABLE 3.1: 15 PIN D-SUB CONNECTOR PIN ASSIGNMENT Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pin Function Red video input Green video input Blue video input Ground Ground Red video ground Green video ground Blue video ground +5V Ground No connection (SDA) Horizontal sync (Composite sync) Vertical sync (SCL) TABLE 3.2: 24 PIN DVI-D CONNECTOR PIN ASSIGNMENT Pin No. 1 Signal Name RX2- Description TMDS negative differential input, channel 2 2 RX2+ TMDS positive differential input, channel 2 3 GND Logic Ground 4 Reserved 4 Reserved. No connection 5 Reserved 5 Reserved. No connection 6 DDC-CLK DDC2B Clock 7 DDC-DAT DDC2B Data 8 Reserved 8 Reserved. No connection 9 RX1- TMDS negative differential input, channel 1 10 RX1+ TMDS positive differential input, channel 1 11 GND Logic Ground 12 Reserved 12 Reserved. No connection 13 Reserved 13 Reserved. No connection 14 VCCX Power 15 GND Logic Ground 16 SENS SENSE Pin, Pull High 17 RX0- TMDS negative differential input, channel 0 ViewSonic Corporation 5 Confidential - Do Not Copy VX500-1

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Default
Input
Connector
Defaults
to
the
first
detected
input
Video
Cable
Strain
Relief
Equal
to
twice
the
weight
of
the
monitor
for
five
minutes.
Video
Cable
Connector
DB-15
Pinout
Compliant
with
IBM
8513
&
DDC
1/2B.
Video
Signals
1.
Video
RGB
(Analog)
Separate,
Composite,
or
Sync
on
Green
2.
TMDS
(Digital)
Video
Impedance
75
Ohms
(Analog),
100
Ohms
(Digital)
Maximum
PC
Video
Signal
950
mV
with
no
damage
to
monitor
Maximum
Mac
Video
Signal
1250
mV
with
no
damage
to
monitor
Sync
Signals
TTL
DDC
1/2B
Compliant
with
Revision
1.0
Sync
Compatibility
Separate
Sync,
Composite
Sync,
SOG
Video
Compatibility
Shall
be
compatible
with
all
PC
type
computers,
Macintosh
computers,
and
after
market
video
cards.
Resolution
Compatibility
640
x
350,
640x400,
640
x
480,
720
x
400,
800
x
600,
and
1024
x
768
Exclusions
Not
compatible
with interlaced
video.
TABLE
3.1:
15
PIN
D
-SUB
CONNECTOR
PIN
ASSIGNMENT
Pin
Number
Pin
Function
1
Red
video
input
2
Green
video
input
3
Blue
video
input
4
Ground
5
Ground
6
Red
video
ground
7
Green
video
ground
8
Blue
video
ground
9
+5V
10
Ground
11
No
connection
12
(SDA)
13
Horizontal
sync
(Composite
sync)
14
Vertical
sync
15
(SCL)
TABLE
3.2:
24
PIN
DVI-D
CONNECTOR
PIN
ASSIGNMENT
Pin
No.
Signal
Name
Description
1
RX2-
TMDS
negative
differential
input,
channel
2
2
RX2+
TMDS
positive
differential
input,
channel
2
3
GND
Logic
Ground
4
Reserved
4
Reserved.
No
connection
5
Reserved
5
Reserved.
No
connection
6
DDC-CLK
DDC2B
Clock
7
DDC-DAT
DDC2B
Data
8
Reserved
8
Reserved.
No
connection
9
RX1-
TMDS
negative
differential
input,
channel
1
10
RX1+
TMDS
positive
differential
input,
channel
1
11
GND
Logic
Ground
12
Reserved
12
Reserved.
No
connection
13
Reserved
13
Reserved.
No
connection
14
VCCX
Power
15
GND
Logic
Ground
16
SENS
SENSE
Pin,
Pull
High
17
RX0-
TMDS
negative
differential
input,
channel
0
ViewSonic
Corporation
5
Confidential
—
Do
Not
Copy
VX500-1