Power Does Not Stay On Or The Mobile Terminal Is Jammed - Nokia 7088 Troubleshooting Manual

Nokia Customer Care

Power Does Not Stay ON or the Mobile Terminal is Jammed

Mobile
Terminal
is Jammed
Measure VDD_MSMP,
VDD_MSMC,
VDD_MSMA, and
VREG_TCXO voltages.
Are they OK?
YES
Measure 32.768kHz
Sleep CLK. Is it OK?
YES
Measure 19.2MHz
MSM_TCXO. 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.
Issue 1 12/2006 © 2006 Nokia Corporation
Baseband Description and Troubleshooting
Check VPH_PWR, VDD_MSMP,
VDD_MSMC, VDD_MSMA, and
NO
VREG_TCXO capacitors. Are
they OK?
YES
Check VBATT_ID and
VPH_PWR. Are they
OK?
YES
Measure the 32.768
NO
kHz clock crystal. Is it
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, C868 and
C869.
Company Confidential
7088 (Flower)
solder joints/ change
Page 33