Mobile Terminal Is Dead - Nokia 6088 Baseband Description And Troubleshooting

6088 (RM218)
Baseband Description and Troubleshooting

Mobile Terminal is Dead

Mobile
Terminal is
Dead
Is the mobile
terminal current is
zero or too high?
NO
Is the current
< 60 mA?
YES
Check RESET_N
signals. Is it high
(2.8V)?
YES
Check PS_HOLD
signals. Is it high
(2.9V)?
NO
Check ROM_CS_N
(TP72). Is it toggling
after RESET_N goes
high?
NO
MSM6025 is defective,
phone cannot be repaired
and must be replaced.
Page 30 © 2006 Nokia Corporation
♦
If current is zero, check L101, L1011, Q400,
R851, F1 and check the power on sequence.
If there is no power output, Reheat solder
joints or change PM6610.
♦
YES
Make sure all BB regulators are at their respective
voltage levels (VREG_MSMA, VREG_MSMP,
VREG_MSMC, VREG_TCXO). Reheat solder
joints / change PM6610 if necessary.
Check J101, C108 and
R110.
NO
Are they OK?
YES
Reheat solder
joints , check R836
NO
or change PM6610
Is flash memory
YES
programming OK?
YES
Memory IC is
defective, phone can
YES
not be repaired and
must be replaced.
Reheat solder joints /
NO
defective, phone can
not be repaired and
must be replaced.
Flash
Memory
NO
Faults
Terminal is
Jammed
Company Confidential
change PM6610.
MSM6025 is
Mobile
Issue 1 10/2006