Acer RA19WAANU 5.5 Abnormalscreen (For the DVI), 24

5.Troubleshooting (continued)

5.5 Abnormalscreen (For the DVI)

Checkthe DVI video signal from computer input

onP303 of DVI-I video connector.

FailurePoint

1)No DVI video signals output from host

computer,check computer.

2)DVI Video signal cable disconnection.

Checkthe DVI input video signals on I305 pin

2,3,4,5,6,7,47,48respectively that differential

inputvoltage is 150 to 1200mV, and input

commondmode voltage is 3.3V.

FailurePoint

Inthe case of the DVI_RX0+/- signal. (A

DVI_RX1+/-,DVI_RX2+/- and DVI_RXC+/-

signalis the same path, too.)

1)Printedwire broke between P303 pin 17, 18 and

I305pin 4. 15.

2)Video cable is failure.

3)R334, R335 open.

Checkall LVDS signals being output to P305

fromI305?

FailurePoint

Printedwire broke between I305 and P305.

Prpcess"Checking the resolution change IC

movement"section.

Go to cover page

ACERX193HQ

Contents

Main Model ID:RA19WAANU Service Manual DBG DPBU IIDBG DPBU II Service ACER ACER_LCD_X193HQ_SM080904V1 Page Page . Page PresetTiming Chart . Page 2.1 MAIN OSD MENU Outline: ACERX193HQ 8 The description for control function: 2OSD Menu Page Page Page S4 S5 S2 S3 S1 S11 S10 S6 S12 S8 S7 Page S6 S5 S7 S3 S4 Page Page S20 S21 S22 S23 Page 5.2 Nothing displays on the screen (Screen is black and colour of LED is blue.) 20 5.2 Nothing displays on the screen (Screen is black and colour of LED is blue)continued 21 5.3Checking the back light unit 22 5.4 Abnormalscreen for VGA 23 5.5 Abnormalscreen (For the DVI) 24 5.6Abnormal OSM display adjust problem 25 5.7Abnormal plug and play operation for VGA 26 5.8 Abnormalplug and play operation (For the DVI) 27 28 5.Troubleshooting (continued) 5.9.2Checking the control circuit of vertical sync pluse 5.10Checking the resolution change IC movement 29 5.11Checking the DC/DC converter circuit 30 5.Troubleshooting (continued) Page Page cedid Page LCD Flat Panel Interface Board Interface Board Audio line input Video Signal input DDC& Function key input