Nokia 6220 Service Manual

CCS Technical Documentation

                                Company confidential 

RH-20

Issue 1  10/2003

Nokia Corporation.

Page 43

Phone is

dead

Start

Is the power key 

working?

Measure voltage 

from S302. Is it 

HIGH?

Check 

R306,C310,S30

2 and line. If OK, 

change UEM

Measure voltage 
from S302 when 

pressed. Is it 

HIGH?

Check S302. Is 

it OK?

Phone is

jammed

Change S302

No

No

No

Yes

Yes

Yes

No

Is the volume 

UP key working?

Measure ROW0 

line from S300. 

Is it ~1.8V?

Check S300 and line. 
If OK, change Z300.If 

still FAIL, change 

UPP

Measure COL0 

from S300 when 
pressed. Is there 

50us pulse?

Check S300 and 

COL0 line. If OK, 

change Z300.If still 

FAIL, change UPP

No

No

Yes

Change UPP

Yes

No

Is the volume 

Down key 

working?

Measure ROW1 

line from S301. 

Is it ~1.8V?

Check S301 and line. 
If OK, change Z300.If 

still FAIL, change 

UPP

Measure COL0 

from S301 when 
pressed. Is there 

50us pulse?

Check S301 and 

COL0 line. If OK, 

change Z300.If still 

FAIL, change UPP

No

No

Yes

Change UPP

Yes

No

Continue

Yes

Yes

Yes