Troubleshooting - Sony CM-S 100 Series Service Manual

Portable cellular telephone with accessories
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Problem
Nothing appears on the
display.
The out-of-service icon (
appears.
Nothing happens when you
press the buttons.
The call does not go
through.
You can hear the other
party, but the other party
cannot hear you.
You hear the other party
only faintly.
The call is cut off
("dropped").
You hear an alternate high/
low tone.
You forgot the lock code.
You hear a fast busy tone.
You cannot place or receive
calls.
SECTION 3

TROUBLESHOOTING

Cause/Remedy
• The phone is off.
Turn the phone on.
• Battery is fully discharged.
Recharge the battery.
• The phone is outside the service area, or the signal is too weak.
)
Extend the antenna fully.
• Check NAM settings on the Network menu.
If you set "Auto-NAM" to "off" and you are using two NAMs, the
phone may be ignoring an available service.
• Keyguard may be on.
Dial 1,2,3 to disable keyguard.
• The phone may be locked.
Enter the lock code to unlock the phone.
• Check the signal strength.
• If the
icon is displayed, there is no service.
See above.
• Check the number.
• Press
.
SEND
• Listen for a busy signal.
• The microphone may be muted. Unmute the microphone.
• Adjust the earpiece volume.
If possible, also reduce the noise around you.
• You could be outside the coverage area. Redial the number. If the
problem continues, contact your carrier. Also see "The out-of-service
icon (
) appears".
• You are attempting to use the phone in an area without service.
• Extend the antenna fully.
• Let the
icon disappear, then try to dial.
• Try 0000, 1234 (commonly used as default), or the last four digits of
your own number.
• See your authorized dealer or service provider.
• This can result from any one of the following:
– The phone is improperly programmed.
– The phone is out of range.
– All channels are busy.
– The antenna is broken or damaged.
• Make sure that the phone is turned on, and that the out-of-service icon
is not displayed.
• Check the system settings.
If you are roaming, consult your service provider concerning roaming
agreements.
– 11 –

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This manual is also suitable for:

Cm-b 200 seriesCm-m 300 series

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