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Measure
32.6kHz Sleep Clk
from testpoint J404
Is it OK ?
Measure
32.6kHz Sleep Clk
from B200.
Is it OK ?
No
Measure
13MHz RFClk from
Is it OK ?
Yes
Measure PURX
signal from testpoint
Is it high
Yes
Measure
VIO, VCORE, FLASH1,
VANA, VR3 voltages.
Are they OK ?
VBATT1–6
VIO, VCORE,
FLASH1, VANA,
VR3 lines. Are
they OK?
No
Yes
Check BSI /
BTEMP lines. If
OK –>
UEM regulators
are not working
Change UEM
Measure 26MHz RFClk
from C660.
Is it OK ?
No
Check R661,
C661, R660,
C660 if OK
change G660
No
Check R420,
C420 if OK
change N600
Yes
Change UEM
No
Yes
Check
L260–L265
C260 – C265
BSI / BTEMP
lines and
VBATT lines
No
Check B200,
C209, C210
No
Change UEM
Yes
Jammed
Page 2
Yes
Phone is
jammed
C420
(1,8V) ?
J402.
Check