Phone Jammed - Nokia NHM-1 Series Troubleshooting Instructions

NHM-1
Troubleshooting instructions

Phone jammed

Start
Measure VIOA,
VCOREA
VMEMA, VMEMB , VR3
voltages. Are they OK?
Yes
Measure 32.7kHz Sleep Clk
from testpoint J404. Is it
OK?
Yes
Measure 19.2MHz RFClk
From J403. Is it OK ?
Yes
Measure PURX - signal from
testpoint J402. Is it ~1.8V?
Yes
Phone shutdown after 30s
No
Measure 1.2MHz Clk signal from
testpoint J422. Is it OK?
Yes
Read phone info. Is it OK?
Yes
retest
Page 42
Check VBATAEM,
No
VBATUEM1, VBATUEM2
VBAT lines. Are they OK?
Yes
Measure Sleep Clk
No
from B200. Is it OK?
Measure 19.2MHZ RFClk
No
from G820. Is it OK?
No
Reflash . Is it OK now ?
Yes
No
Measure FBUSRX-signal during
No
phone info read from testpoint
J115. Is it OK?
Yes
Measure FBUSTX-signal during
phone info read from testpoint
J116. Is it OK?
Yes
Nokia Corporation.
CCS Technical Documentation
Check N301, L301- L303.
No
C323 – C333.
Check BSI/BTEMP - Lines,
C301 , L300
If Ok Change AEM.
Check B200, C211
No
and C212
Yes Change UEM
Check G820, R822 and C870
No
If not OK, change faulty part
Check C660, C861 and L899
Yes
If OK, change N600.
Change UEM
No
Change TIKU
No Change UEM
No
Change TIKU
Change UEM
Issue 1 11/03