74 CY-VH9300U CY-VH9300U 75TroubleshootingENGLISH31Preliminary StepsCheck and take steps as described in the tables below.For items in the “Possible solution” column in the tables below that relate to wiring connections or installation,do not attempt to do the repair work or check the wiring yourself.For whatever is printed in italics in the “Possible solution” column, turn to the reference page given, andconduct the operations and checks yourself.If You Suspect Something WrongImmediately switch MAIN POWER to OFF.Disconnect the power connector and check that there is neither smoke nor heat from the unit before asking forrepairs. Never try to repair the unit by yourself because it is dangerous to do so. Instead, be absolutely sure toconsult with your dealer or your nearest Panasonic Servicenter and request repairs.WARNING:≥ Do not use the product when it is broken or there is some abnormality.In the unlikely event that the product breaks (such as when no image is displayed or there is nosound) or there is some abnormality (such as when a foreign object is inside the product, water wasspilled on it, smoke comes out or the product makes a strange smell), immediately stop using theproduct, switch MAIN POWER to OFF and be sure to contact the store from which you purchased yourproduct or a nearby Panasonic Servicenter.Continuing to use the product in that condition could cause accidents, fire or electrical shock.≥ If there are any problems in the wiring connections or installation, do not attempt to do the repairwork or check the wiring yourself. Instead, be absolutely sure to consult with your dealer or yournearest Panasonic Servicenter and request repairs.Troubleshooting TipsCommonNo power to the unit.The power cord (battery, ACC andground) is connected in the wrongway.Check the wiring.Fuse blow out. Eliminate the cause of fuse blow outand replace the fuse with new one.Consult your dealer.Problem Possible cause Possible solution (reference page)Sound is notgenerated.The volume on the headphones isadjusted to zero.Raise the volume on the headphones.(page 53)MAIN POWER switch is set to OFF. Switch MAIN POWER to ON. (page 54)The power of headphones is set toOFF.Switch the power of headphones toON. (page 53)ENGLISH32Problem Possible cause Possible solution (reference page)NoiseThere is an electromagnetic-wavegenerator such as a cellular phonenear the unit or its electrical lines.Keep an electromagnetic-wavegenerator such as a cellular phoneaway from the unit and the wiring ofthe unit.In case the noise cannot be eliminateddue to the wiring harness of the car,consult your dealer.The contact of the ground lead ispoor.Make sure that the ground lead issecurely connected to an unpaintedpart of the chassis.The headphones are too far fromthis unit.Use the headphones within a distanceof 2.5 m from the unit. (page 53)The path between the unit andheadphones is obstructed bysomething.The batteries of the IR wirelessheadphones have run down.When using the headphones, removeany obstacles that obstruct the pathbetween the headphones and unit.(page 53)Replace the batteries. (page 52)Common (continued)MonitorThe tilt angle orthe lateral angle ofthe display is notadjustable.There is an obstacle. Install the unit where the unit movesfreely.Problem Possible cause Possible solution (reference page)Noise is made instep with enginerevolutions.Alternator noise comes from thecar.Change the wiring position of theground lead.Mount a noise filter on the power supply.Dome lightDome lights do notcome on.The wires are not connectedproperly.For the wiring connections of the domelights, consult a specialized contractoror your dealer where you purchasedthe unit.Problem Possible cause Possible solution (reference page)The dome light switch is at the OFFposition.Set it to the ON position. (page 46)The batteries of the IR wirelessheadphones have run down.Replace the batteries. (page 52)Cables are not correctly connected. Connect cables correctly.