Sony MDX-C7970R Troubleshooting guide, General, Problem, display, Problem, Problem, No sound, function, possible, vibration, No beep sound, Cause/Solution, CD/MD playback

Troubleshooting guide

Thefollowingchecklistwillhelpyouremedytheproblemsyoumayencounterwithyourunit. Beforegoingthroughthechecklistbelow,checktheconnectionandoperatingprocedures.

General

Problem	Cause/Solution
No sound.	•CanceltheATTfunction.
	•Setthefadercontroltothecentrepositionfortwo-speaker
	systems.
	•Rotatethedialinaclockwisedirectiontoadjustthevolume.
The contents of the memory	•Thepowercordorbatteryhasbeendisconnected.
have been erased.	•Theresetbuttonhasbeenpressed.
	nStoreagainintothememory.

Indications do not appear in the Removethefrontpanelandcleantheconnectors.See

display.	“Cleaningtheconnectors”(page25)fordetails.
No beep sound.	Thebeepsoundiscancelled(page19).

CD/MD playback

Problem	Cause/Solution
A disc cannot be loaded.	•AnotherMDisalreadyloaded.
	•TheMDisforciblyinsertedupsidedownorinthewrong
	way.
Playback does not begin.	Defective MD or dirty CD.
A disc is automatically ejected.	Theambienttemperatureexceeds50°C.
MD will not eject.	Press 6fortwoseconds.
The operation buttons do not	Presstheresetbutton.
function.
The sound skips due to	•Theunitisinstalledatanangleofmorethan20°.
vibration.	• The unit is not installed in a sturdy part of the car.

Radio reception

Problem	Cause/Solution
Preset tuning is not possible.	•Memorisethecorrectfrequency.
	•Thebroadcastsignalistooweak.
Automatic tuning is not	Thebroadcastsignalistooweak.
possible.	nUsemanualtuning.
The “ST” indication flashes.	•Tuneinthefrequencyaccurately.
	•Thebroadcastsignalistooweak.
	nSettotheMonomode(page12).

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