Nokia 7270 Service Manual

Issue 2  03/2005

COMPANY CONFIDENTIAL

26

Copyright © 2005 Nokia. All Rights Reserved.

RM-8/RM-47/RM-48

Nokia Customer Care

■ 

Start

Go to “Uplink

missing audio 

signal”

Is there

an audio

signal?

Go to “Uplink

weak audio 

signal

”

Go to “Uplink

distorted audio 

signal”

Is there no

acoustical

feedback?

Is TDMA

noise

inaudible?

Is audio

signal free

of noise?

Is audio

signal

undistorted?

Is audio

level

sufficient?

Is there

an audio

signal?

Click noise, audio

signal too loud or

bad picture/

sound

synchronization

Is audio

signal

undistorted?

Is audio

level

sufficient?

Is TDMA

noise

inaudible?

Is there no

acoustical

feedback?

Is problem

uplink or

downlink?

Go to 

“Acoustical

feedback”

Go to “Uplink

TDMA noise”

Go to 

“Downlink

missing audio 

signal”

Go to 

“Downlink

weak audio 

signal

”

Go to 

“Downlink

distorted audio 

signal”

Go to

“Downlink

TDMA noise ”

Go to

“Downlink

audio signal 

noise”

Go to 

“Acoustical

feedback”

Uplink

Downlink

No

No

No

No

No

No

No

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Software

error or bad

TIKU

Downlink = incoming
audio to e.g. earpiece

Uplink = outgoing 
audio from e.g. microphone