Troubleshooting - Sony XM-S400D Operating Instructions Manual

Troubleshooting

The following checklist will assist in the correction
of most problems which you may encounter with
your unit. Before going through the checklist below,
refer to the connection and operating procedures.
The POWER/PROTECT indicator does not light up.
 The fuse is blown.
 Replace the fuse with a new one.
 The ground (earth) wire is not securely
connected.
 Fasten the ground (earth) wire securely to a
metal point of the car.
 The voltage going into the remote input (REM)
wire is too low.
 Turn on the car audio unit if it is not turned on.
 Use a relay if the system employs too many
amplifiers.
 Check the battery voltage (10.5 V – 16 V).
The POWER/PROTECT indicator flashes quickly
(once every 0.2 seconds) and the unit turns off
automatically.
 The speaker outputs are short circuited.
 Take out any media from the car audio unit and
turn the connected equipment off, then
determine the cause of the short circuits.
 The speaker cord and ground (earth) wire are not
securely connected.
 Take out any media from the car audio unit and
turn the connected equipment off, then
connect the speaker cord securely and fasten
the ground (earth) wire to a metal point of the
car.
 The unit has overheated.
 Wait until the unit cools down.
 Check whether the impedance of the
connected speakers is lower than 4 Ω.
The POWER/PROTECT indicator flashes slowly
(once every second) and sound becomes low.
 The unit has overheated and thermal protector is
activated.
 Turn the volume down.
12
GB
The unit becomes abnormally hot.
 Use speakers with a suitable impedance of 4 Ω -
8 Ω.
 Make sure to place the unit in a well ventilated
location.
Alternator noise is heard.
 The power connecting wires are installed too
close to the RCA pin cords.
 Keep the wires away from the cords.
 The ground (earth) wire is not securely
connected.
 Fasten the ground (earth) wire securely to a
metal point of the car.
The filter switch is set to the wrong position.
 When connecting the subwoofer (2-way system
connection), set the REAR LPF switch to "ON"
(page 9).
 When connecting the full range speaker (2-way
system connection), set the FRONT HPF switch to
"ON" (page 9).
 When connecting the front speakers and the rear
speakers (4-speaker system connection), set the
FRONT HPF and REAR LPF switches to "OFF"
(page 9).
If these solutions do not help improve the situation,
consult your nearest Sony dealer.