Acer RA19WAANU Service Manual page 4

Pin Signal Pin
1 Red-Video 6 Red-GND
Green-Video Green-GND
2 7
Blue-Video Blue-GND
3 8
4 NC 9 + 5V
5 Connection Detect 10 GND
Connector Pin Description
D-SUB Description
Pin Name
1 Red-Video Red video signal input
2 Green-Video Green video signal input
3 Blue-Video Blue video signal input
4 NC Not connect
5 Connection Detect Deteck VGA Cable have Connected or not
6 Red-GND Analog signal ground for the Red video
7 Green-GND Analog signal ground for the Green video
8 Blue-GND Analog signal ground for the Blue video
9 +5V +5V input from host system for the VESA DDC 2Bi function
10 Sync-GND Signal ground
11 NC Not connect
12 NCDDC-SDA SDA signal input for the VESA DDC 2Bi function
13 H-SYNC Horizontal signal input from the host system
14 V-SYNC Vertical signal input from the host system
15 DDC-SCL SCL signal input for the VESA DDC 2Bi function
DVI-I/DVI-D(If using DVI-D cable,C1,C2,C3,C4,C5 is NC)
Pin Signal Pin Signal
1 RX2- 13 NC
2 RX2+ 14 5V
3 GND 15 DVI Connect
4 NC 16 HP
5 NC 17 RX0-
6 SCL 18 RX0+
7 SCA 19 GND
8 Analog V-Sync(NC) 20 NC
9 RX1- 21 NC
10 RX1+ 22 GND
11 GND 23 RXC+
12 NC 24 RXC-
DVI-I/DVI-D Connector Pin Description
Pin Name Desription
1 RX2- TMDS link #0 channel #2 differential pair
2 RX2+ TMDS link #0 channel #3 differential pair
3 GND GND for no link share
4 NC NC
5 NC NC
6 SCL Clock line for DDC interface
7 SDA Data line for DDC interface
8 Analog V-Sync V-sync for analog interface
9 RX1- TMDS link #0 change #1 differential pair
10 RX1+ TMDS link #0 change #1 differential pair
11 GND GND for no link share
12 NC NC
13 NC NC
14 5V +5V input from host system for DDC 2B function
15 DVI Connect Using as Detect Cable
1.3.1.3 Audio Jack (option)
This jack shall connect the audio input from
host computer.
1.3.2 Video Input Signals
Video Input Signal Ranges
1. Product Specification (continued)
Signal Pin Signal
11 NC
DDC-SDA
12
H-SYNC
13
14 V-SYNC
15 DDC-SCL
Description
Pin Signal
C1 Analog Red(NC)
C2 Analog Green (NC)
C3 Analog Blue (NC)
C4 Analog H-Sync (NC)
C5 GND
Pi
n Name Desription
16 HP Hot plugging
17 RX0- TMDS link #0 change #1 differential pair
18 RX0+ TMDS link #0 change #1 differential pair
19 GND GND for no link share
20 NC NC
21 NC NC
22 GND Clock shield
23 RXC+ TMDS clock differential pair
24 RXC- TMDS clock differential pair
C1 Analog Red Analog Red signal
C2 Analog Green Analog Green signal
C3 Analog Blue Analog Blue signal
C4 Analog H-Sync H-Sync for analog interface
C5 Analog GND Analog GND
No. Symbol Item
1 Fh Horizontal Frequency
2 Fv Vertical Frequency
3 Vih Hi Level Input
4 Vil Low Level Input
RGB Analog Video
5 Video Level
Note 1) Schmitt-Triggers Input, Supported 3.3V device
H(&V) sync output from PC
V id e o I n p u t S ig n a l
N o . S y m b o l I t e m
1 F h S c a n n in g H o r iz o n ta l F r e q u e n c y
2 F v S c a n n in g V e r tic a l F r e q u e n c y
3 V ih H i L e v e l I n p u t
V il L o w L e v e l I n p u t
4
5 V id e o R G B A n a lo g V id e o L e v e l
N o te 1 ) S c h m itt- T r ig g e r s I n p u t , S u p p o r te d 3 .3 V d e v ic e H ( & V ) s y n c o u tp u t fr o m P C .
1.3.2.1 Video Signal Amplitudes
The three video inputs consist of Red ,Green , and Blue
signals, each with its own coaxial cable terminated at the
monitor. These video signals are analog levels, where 0
V corresponds to black , and 700 mV is the maximum
signal amplitude for the respective color, when each
signal is terminated by a nominal 75.0 ohms .For a given
monitor luminance levels are measured using this
defined video amplitud driving a monitor meeting the
termination requirements .The signal amplitude is not to
be readjusted to compensate for variations in termination
impedance.
1.3.2.2 Video Signal Termination Impedance
This analog video signal termination shall be 75
which shall be resistive with a negligible reactive
.
component
1.3.2.3 Synchronization ( Sync ) Signals
The Horizontal Sync (HS) TTL signal is used to initiate
the display of a horizontal line. HS may be either active
high or active low, depending upon the timing .The
Vertical Sync (VS) TTL signal is used to initiate the
display of a new frame .VS may be either active high or
active low, depending on the timing
1.3.2.4 Sync Signal Levels
The monitor must accept sync signals from both 3.3 and
5 volt TTL logic families.The inputs shall sense a logic 0
when the input is 0.8 volt or less and shall sense a logic
1 when the input is 2.0 volts or greater. In addition to
these level requirements, there shall also be a minimum
of 0.3 volt hysteresis provided for noise immunity
(typically by using a Schmitt Trigger input ).That is , the
input level at which the monitor actually detects a logic 0
shall be at least 0.3 volt lower than the level at which it
actually detects a logic 1.If the monitor sync processing
circuits are designed around the 3.3 volt logic family
,then the sync inputs must be 5 volt tolerant .
ACER X193HQ
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Min Normal Max Unit Remark
31 83 kHz Minimum range
56 75 Hz Minimum range
2.0 5.0 V Note 1)
0 0.8 V Note 1)
0.0 0.7 0.1 V 75Ω to Ground
M in N o r m a l M a x U n it R e m a r k
3 0 9 4 k H z M in im u m r a n g e
5 5 7 6 H z M in im u m r a n g e
2 5 N o te 1 )
0 0 .8 V N o te 1 )
0 .0 0 .7 1 .0 V 7 5 Ω to G r o u n d
Ω+/-
3
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