Nokia 6610 Troubleshooting Instructions page 28

NHL-4/4U
Troubleshooting Instructions
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Start
Measure VIO, VCORE,
VFLASH1,VANA, VR3
voltages. Are they OK?
Yes
Measure 32.6kHz Sleep Clk
from testpoint J404. Is it
OK?
Yes
Measure 26MHz RFClk
from R420. Is it OK?
Yes
Measure PURX-signal from
testpoint J402. Is it ~1.8V?
Yes
Phone shutdown after 30s
No
Measure 1MHz Clk signal from
testpoint J413. Is it OK?
Yes
Read phone info. Is it OK?
Yes
Change TB4
module or retest
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Check VBATT1-6, VIO,
No
VCORE, VANA, VR3
lines. Are they OK?
Yes
Measure Sleep Clk
No
from B200. Is it OK?
Measure 26MHZ RFClk
No
from G501. Is it OK?
No
Measure watchdog signal from
Yes
testpoint J414. Is it OK?
No
Measure FBUSRX-signal during
No
phone info read from testpoint
J412. Is it OK?
Yes
Measure FBUSTX-signal during
phone info read from testpoint
J411. Is it OK?
Yes
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Check L260-L265,
No
C260-C265, BSI/BTEMP
-lines and VBATT-lines
Check BSI/BTEMP-lines. If
OK, UEM regulators are not
working. Change UEM.
Check B200, C209
No
and C210
Yes
Change UEM
Check G501.
No
If not OK, change.
Check R420, C420.
Yes
If OK, change N500.
Change UEM
No Change UPP
No Change UEM
No
Change UPP
Change UEM
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