Kenwood KDC-Z939 Instruction Manual

Also see for kdc-z939: Service manual

English— 46 —What might seem to be a malfunction in your unit mayjust be the result of slight misoperation or miswiring.Before calling service, first check the following tablefor possible problems.General? The power does not turn ON.01✔ The fuse has blown.☞ After checking for short circuits in the wires, replace the fuse withone with the same rating.✔ No ACC position on vehicle ignition.02☞ Connect the same wire to the ignition as the battery wire.? Nothing happens when the buttons are pressed.04✔ The computer chip in the unit is not functioning normally.☞ Press the reset button on the unit (page 4).? There’s a source you can’t switch.06✔ There’s no CD inserted.☞ Set the media you want to listen to. If there’s no media in thisunit, you can't switch to each source.✔ The Disc changer isn’t connected.08☞ Connect the Disc changer. If the Disc changer isn’t connected toit's input terminal, You can't switch to an external disc source.? The faceplate does not open or close.09✔ The faceplate is incorrectly attached.☞ Reattach the faceplate correctly, See the section on the Faceplate>(page 18).? The memory is erased when the ignition is turned OFF.10✔ The battery wire has not been connected to the proper terminal.☞ Connect the wire correctly, referring to the section on.✔ The ignition and battery wire are incorrectly connected.11☞ Connect the wire correctly, referring to the section on.? There’s no loudness effect.12✔ You’re using Non-fading preout.☞ Loudness has no effect in Non-fading preout.? The TEL mute function does not work.15✔ The TEL mute wire is not connected properly.☞ Connect the wire correctly, referring to the section on.? The TEL mute function turns ON even though the TEL mute wire isnot connected.16✔ The TEL mute wire is touching a metal part of the car.☞ Pull the TEL mute wire away from the metal part of the car.? Even if Loudness is turned ON, high-pitched tone isn't compensatedfor. 17✔ Tuner source is selected.☞ High-pitched tone isn't compensated for when in Tuner source.? The Bass center frequency, Bass quality factor, Bass extend, Middlecenter frequency, Middle quality factor, and Treble center frequencycan’t be adjusted.19✔ The (page 36) is set OFF.☞ Set it ON.? No sound can be heard, or the volume is low.✔ The fader or balance settings are set all the way to one side.21☞ Center the fader and balance settings.✔ The input/output wires or wiring harness are connected incorrectly.22☞ Reconnect the input/output wires or the wiring harness correctly.See the section on .✔ The values of Volume offset are low.24☞ Increase the values of Volume offset. (page 10)✔ The (page 36) is ON.100☞ Turn it OFF.? The sound quality is poor or distorted.25✔ One of the speaker wires is being pinched by a screw in the car.☞ Check the speaker wiring.✔ The speakers are not wired correctly.27☞ Reconnect the speaker wires so that each output terminal isconnected to a different speaker.Troubleshooting Guide— 46 —