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• If the dust cannot be removed from the air filter, replace the air filter with the supplied new one. • Be sure to attach the air filter cover firmly; the power will not be turned on if it is not closed securely. • The air filter has a face and a reverse side. Place the air filter so that it fits in a notch on the air filter cover. GB 32 Maintenance Troubleshooting If the projector appears to be operating erratically, try to diagnose and correct the problem using the following instructions. If the problem persists, consult with qualified Sony personnel. Power Symptom The power is not turned on. Both the LAMP/COVER and TEMP/FAN indicators light up. Cause and Remedy • The power has been turned off and on with the I / 1 key at a short interval. c Wait for about 90 seconds before turning on the power (see page 23). • The lamp cover is detached. c Close the lamp cover securely (see page 31). • The air filter cover is detached. c Close the air filter cover securely (see page 32). • The electrical system breaks down. c Consult with qualified Sony personnel. Picture Symptom No picture. The picture is noisy. The picture from INPUT A connector is colored strange. “Please check INPUT-A setting.” appears in spite of inputting the correct signal from INPUT A. On-screen display does not appear. Cause and Remedy • Cable is disconnected or the connections are wrong. c Check that the proper connections have been made (see page 15). • Input selection is incorrect. c Select the input source correctly using the INPUT key (see page 21). • The computer signal is not set to output to an external monitor. c Set the computer signal to output to an external monitor (see page 15). • The computer signal is set to output to both the LCD of the computer and external monitor. c Set the computer signal to output only to the external monitor (see page 15). • Noise may appear on the background depending on the combination of the numbers of dot input from the connector and numbers of pixel on the LCD panel. c Change the desktop pattern on the connected computer. • Setting for INPUT-A in the SET SETTING menu is incorrect. c Select COMPUTER, VIDEO GBR or COMPONENT for INPUT-A in the SET SETTING menu according to the input signal (see page 29). • Setting for INPUT-A in the SET SETTING menu is incorrect. c Select COMPUTER, VIDEO GBR or COMPONENT for INPUT-A in the SET SETTING menu according to the input signal (see page 29). • STATUS in the SET SETTING menu has been set to OFF. c Set STATUS in the SET SETTING menu to ON (see page 29). Maintenance 33 33 GB Troubleshooting Symptom Cause and Remedy Color balance is incorrect. • Picture has not been adjusted properly. c Adjust the picture (see page 26). • Projector is set to wrong color system. c Set COLOR SYS in the PICTURE CTRL menu to match the color system being input (see page 27). The picture is too dark. • Contrast or brightness has not been adjusted properly. c Adjust the contrast or brightness in the PICTURE CTRL menu properly (see page 26). The picture is not clear. • Picture is out of focus. c Adjust the focus (see page 22). • Condensation has occurred on the lens. c Leave the projector for about two hours with the power on. The picture appears too small on the screen. • SHIFT in the INPUT SETTING menu has not been adjusted properly. c Adjust SHIFT in the INPUT SETTING menu properly (see page 28). The picture flickers. • DOT PHASE in the INPUT SETTING menu has not been adjusted properly. c Adjust DOT PHASE in the INPUT SETTING menu properly (see page 27). Sound Symptom Cause and Remedy No sound. • Cable is disconnected or the connections are wrong. c Check that the proper connections have been made (see page 15). When sound is input through AUDIO connector, sound comes through one channel only. • Monaural sound is being input through the AUDIO connector. c Input stereo sound. Remote Commander Symptom Cause and Remedy The Remote Commander does not work. • The Remote Commander batteries are dead. c Replace with a new battery (see page 12). Others Symptom Cause and Remedy The LAMP/COVER indicator flashes. • The lamp cover or the air filter cover is detached. c Attach the cover securely (see page 31). The LAMP/COVER indicator lights up. • The lamp has reached the end of its life. c Replace the lamp (see page 31). • The lamp becomes a high temperature. c Wait for 90 seconds to cool down the lamp and turn on the power again (see page 23). GB 34 Troubleshooting Symptom Cause and Remedy The TEMP/FAN indicator flashes. • The fan is broken. c Consult with qualified Sony personnel. The TEMP/FAN indicator lights up. • The internal temperature is unusually high. c Check to see if nothing is blocking the ventilation holes. Both the LAMP/COVER and TEMP/FAN indicators light up. • The electrical system breaks down. c Consult with qualified Sony personnel. Warning Messages Use the list below to check the meaning of the messages displayed on the screen. Message Meaning and Remedy High temp.! Lamp off in 1 ...