Acer X193 X183H / X193HQ Service Guide - Page 4

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Product Specification (continued) ACER X193HQ 3 Go to cover page Pin Signal 1 Red-Video 2 Green-Video 3 Blue-Video 4 NC 5 Connection Detect Pin Signal 6 Red-GND 7 Green-GND 8 Blue-GND 9 + 5V 10 GND Pin 11 NC 12 DDC-SDA 13 H-SYNC 14 V-SYNC 15 DDC-SCL Signal Connector Pin Description D-SUB Description Pin Name 1 Red-Video 2 Green-Video 3 Blue-Video 4 NC 5 Connection Detect 6 Red-GND 7 Green-GND 8 Blue-GND 9 +5V 10 Sync-GND 11 NC 12 NCDDC-SDA 13 H-SYNC 14 V-SYNC 15 DDC-SCL Description Red video signal input Green video signal input Blue video signal input Not connect Deteck VGA Cable have Connected or not Analog signal ground for the Red video Analog signal ground for the Green video Analog signal ground for the Blue video +5V input from host system for the VESA DDC 2Bi function Signal ground Not connect SDA signal input for the VESA DDC 2Bi function Horizontal signal input from the host system Vertical signal input from the host system 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 1 2 3 4 5 6 7 8 9 10 11 12 Signal RX2RX2+ GND NC NC SCL SCA Analog V-Sync(NC) RX1RX1+ GND NC Pin 13 14 15 16 17 18 19 20 21 22 23 24 Signal NC 5V DVI Connect HP RX0RX0+ GND NC NC GND RXC+ RXC- Pin Signal C1 Analog Red(NC) C2 Analog Green (NC) C3 Analog Blue (NC) C4 Analog H-Sync (NC) C5 GND 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 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 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 No. Symbol Item Min Normal Max Unit Remark 1 Fh Horizontal Frequency 31 83 kHz Minimum range 2 Fv Vertical Frequency 56 75 Hz Minimum range 3 Vih Hi Level Input 2.0 5.0 V Note 1) 4 Vil Low Level Input 0 0.8 V Note 1) RGB Analog Video 5 Video Level 0.0 0.7 0.1 V 75Ω to Ground Note 1) Schmitt-Triggers Input, Supported 3.3V device H(&V) sync output from PC V ideo Input Signal No. Sym bol Item 1 Fh Scanning H orizontal Frequency 2 Fv Scanning V ertical Frequency 3 V ih H i Level Input M in 30 55 2 Norm al M ax 94 76 5 U nit kHz Hz Rem ark M inim um range M inim um range N ote 1) 4 V il Low Level Input 0 0.8 V N ote 1) 5 V ideo R G B A nalog V ideo L evel 0 .0 0 .7 1.0 V 75Ω to G round N ote 1) Schm itt-T riggers Input , Supported 3.3V device H (& V ) sync output from PC . 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 75Ω+/-1% 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 .