Nokia 800Xi Service Manual

Contents

Nokia 800Xi Service Manual Manual pdf 23 page image

DPMS (Display Power Management Signaling) is a trade mark of Video Electronics StandardAssociation (VESA)456A166. Site Preparation6.1. TroubleshootingThese troubleshooting instructions are meant to eliminate interruptions of use caused by possibleeasy--to--find defects (e.g. loose connector).Symptom MeasuresPicturescreen isblankThe indi-cator onthe frontpanel isnot illumi-natedCheck that the power cord is correctly connected to the monitor and to the powerunit. If the monitor is powered through the computer, check that the computer isswitched on with the mains switch. Use a desk light, for example, to verify thatcurrent is connected to a power outlet. If no electricity is connected to the outlet,call an electrician.nated Unplug the power unit from the power outlet for about one minute.The indi-cator onth f tThe monitor might be in stand--by position. Push one of the PC’s buttons or movethe mouse.the frontpanel is il- Check that the keyboard’s connection to the computer is OK.panel is il-luminated Check that the signal cable connector is connected. If the connector is loose,tighten the connector’s screws.Unplug the monitor from power outlet for about one minuteUnplug the monitor from power outlet for about one minute.Check the signal cable’s connection pins. If the pins are slightly distorted,use nose pliers to straighten them.The computer may use a timing values which are out of the monitor’s synchroniza-tion range.Picture has color defects Adjust color temperature ( Contrast / R, G, B)Information fades onhit b k dReduce brightness and contrast.white backgroundgReset Brightness / W to the factory preset value.Horizontal or vertical dis-turbanices on the screenAdjust pixel frequency (H.size) and phase (Clock phase).Center the picture (H.position/V.Position)Poor brightness or con-trastThe life time of the back--light is limited. In 15 000 hours the luminance of the back--light has been reduced to half of its original value.Monitor cannot be ad-justed with buttons onfront panelUnplug the monitor from power outlet for about one minute.6.2. Checking the Operation of PowerSaverThe monitor is equipped with a power management function. If the computer is left idle, the functiongradually reduced the power consumption of the monitor to a fraction of the normal consumption.The proper operation of the function requires a computer with VESA DPMS power managementcapabilities. Note that the power saving feature must be activated in the computer when checkingthe operation.State LED indicators H sync V sync I/F board Panel Back lightNormal Operation Green Pulse Pulse Yes Yes YesStand ---by Red No Pulse No No NoSuspend Red Pulse No No No NoOff Red No No No No NoSwitched off Not illuminated No No No No No