6red LED at the front of the TV set)z See if it’s receiving the signal that is transmitted fromother source than the stationz Check if it’s connected to the wrong terminal or if theinput mode is correct.z Check if the signal cable connection between videosource and the liquid crystal TV set is correct.Deterioration of color phase or colortonez Check if all the picture setups have been corrected.Screen position or size is not proper z Check is the screen position and size is correctly setup.Picture is twisted and deformed z Check to see if the picture-frame ratio is properly setup.Picture color changed or colorless z Check the “Component” or “RGB” settings of theliquid crystal TV set and make proper adjustmentaccording to the signal types.Picture too bright and there isdistortion in the brightest areaz Check if the contrast setting is too high.z Possibly the output quality of DVD broadcaster is settoo high.z It maybe also due to improper terminal connection ofthe video signal in a certain position of the system.Picture is whitish or too bright in thedarkest area of the picturez Check if the setting for the brightness is too highz Possibly the brightness grade of DVD player(broadcaster) is set too high.No picture or signal produced from thedisplayer if “XXX in search” appears.z Check if the cable is disconnected.z Check if it’s connected to the proper terminal or if theinput mode is correct.There appears an indication - “outsidethe receivable scope)z Check if the TV set can receive input signal. Thesignal is not correctly identified and VGA format isbeyond the specified scope.Remote control cannot work properly z Check if the batteries are installed in the reverseorder.z Check if the battery is effective.z Check the distance or angle from the monitor.z Check if there is any obstruct between the remotecontrol and the TV set.z Check if the remote control signal- receiving windowis exposed to strong fluorescence.No picture and sound, but only hash. z Check if the antenna cable is correctly connected, orif it has received the video signal correctly.Blur picture z Check if the antenna cable is correctly connected.z Of if it has received the right video signal.No sound z Check if the “mute” audio frequency setting isselected.6TROUBLE SHOOTING

service manual

Safety instructions

Alignment instruction

Trouble shooting

Method of software upgrading

The unit working principle analysis

Block diagram

IC block diagram

Identification criteria for the bright spot and dark spot of the LCD screen

Wiring diagram

Troubleshooting charts

Schematic diagram

Exploded View

parts list

Sanyo LCD-20XR1/AU Service Manual

LCD-20XR1/AU