Power Does Not Stay On Or The Mobile Terminal Is Jammed - Nokia 6088 Baseband Description And Troubleshooting

6088 (RM218)
Baseband Description and Troubleshooting

Power Does Not Stay ON or the Mobile Terminal is Jammed

Mobile
Terminal
is Jammed
Measure VREG_MSMP,
VREG_MSMC,
VREG_MSMA, and
VREG_TCXO voltages.
Are they OK?
YES
Measure 32kHz Sleep
CLK from testpoint. Is
it OK?
YES
Measure 19.2MHz
RF CLK at testpoint.
Is it OK?
YES
Measure RESET_N.
Is it high (2.8V)?
YES
MSM6025 is
defective, phone can
not be repaired and
must be replaced.
Page 32 © 2006 Nokia Corporation
Check VPH_PWR, VREG_MSMP,
VREG_MSMC, VREG_MSMA,
NO
and VREG_TCXO capacitors.
Are they OK?
YES
Check "BSI" line
and VPH_PWR line.
Are they OK?
YES
Measure the 32 kHz
NO
clock crystal. Is it OK?
YES
Reheat solder joints or
change PM6610
Measure the
19.2MHz CLK
NO
coming from the
TCXO. Is it OK?
YES
MSM6025 is
defective, phone can
not be repaired and
must be replaced.
Reheat solder joints
NO
or change PM6610
Repair capacitors, reheat
NO
TCXO(Y102) and PM6610
Reheat solder
NO
joints or change
PM6610
NO Change Y1
Check/ reheat solder
joints/ change
VREG_TCXO, Y102,
NO
R839, R849, C870,
C871, C869 and C868
Company Confidential
solder joints/ change
Issue 1 10/2006