Sony LBT-ZX80D User Manual

Should you encounter a problem with your 
system, do the following:

Make sure the power cord and speaker 
cords are connected correctly and firmly.

Find your problem in the troubleshooting 
checklist below and take the indicated 
corrective action.

If the problem persists after doing all of the 
above, consult your nearest Sony dealer.

• The demonstration mode started. Press ?/1 (see 

step 8 of “Hooking up the system” on page 11).

• The power cord is disconnected or a power failure 

occured. Redo “Setting the clock” (page 14). If 
you have set the timer, redo “Waking up to music” 
(page 69) and “Timer recording radio programs” 
(page 70).

• The power cord is disconnected or a power failure 

occured for longer than half a day. Redo 
“Presetting radio stations” (page 51).

• A power failure has occurred. Set the clock 

(page 14) and timer settings (page 69 and 70) 
again.

• Press VOLUME + repeatedly (or turn MASTER 

VOLUME on the unit clockwise).

• The headphones are connected to the PHONES 

jack.

• Check the speaker connections (page 9).

• There is no audio output during Timer Recording.

• The system is in pause mode, in Slow-motion Play 

or in Lock Search. Press H (or nN on the 
unit) to start the playback.

• Press VOLUME + repeatedly (or turn MASTER 

VOLUME on the unit clockwise) or turn MIC 1 
LEVEL or MIC 2 LEVEL on the unit clockwise to 
adjust the microphone volume.

• Make sure the microphone is connected to the 

MIC 1 or MIC 2 jack correctly.

• A TV or VCR is placed too close to the unit. Move 

the unit away from the TV or VCR.

• Move the unit away from the source of noise.

• Connect the unit to a different wall outlet.

• Install a noise filter (commercially available) to 

the power cord.

When the ?/1 indicator flashes

Immediately unplug the power cord and 
check the following items.

• (FST-ZX100D/LBT-ZX100D/

MHC-GN1000D only)
Is the system control cable connected 
correctly?

• If your unit have a voltage selector, is the 

voltage selector set to the correct voltage?
Check the voltage for your region, then 
make sure the voltage selector is set 
correctly.

• Are the + and – speaker cords short-

circuited?

• Are you using the supplied speakers?

• Is anything blocking the ventilation holes 

on the rear of the unit?

After checking the above items and fixing 
any problems, plug in the power cord again 
and turn on the unit. If the ?/1

indicator still 

flashes, or if the cause of the problem cannot 
be found even after checking all the above 
items, consult your nearest Sony dealer.