Nokia 6020b サービスマニュアル

 RM-31

Nokia Customer Care                                6(a) - Baseband Troubleshooting Instructions

12

COMPANY CONFIDENTIAL

Issue 1 03/2005

Copyright © 2005 Nokia. All Rights Reserved.

■ 

Measure

32.8 kHz Sleep Clk

from C2241.

Is it OK?

Yes

No

No

Yes

Yes

Phone 

is 

jammed

     

Check 

   VBATT1-6, VIO, 

  VCORE, VFLASH1, 

VANA, 

VR3 lines. 

Are they ok?

Check L2200, 

C2239, 

BSI/BTEMP lines 

and VBATT lines

Check BSI/BTEMP 

lines. If OK UEM 

regulators are not 

working. Change 

UEM.

Check B2200, 

C2210, C2241.

Change UEM

Measure
32.8kHz 

Sleep Clk

from testpoint J2802.

Is it OK?

Measure

VIO, VCORE, 

VFLASH1,

VANA, VR3 voltages.

Are they

OK?

Yes

No

No

See Waveform 3

See Waveform 4

Retest

Goto Part 

2

Retest