Keypad Faults - Nokia 7088 Troubleshooting Manual

Nokia Customer Care

Keypad Faults

Keypad
Faults
Is the power
key working?
YES
Keypad
Faults
Page 2
Issue 1 12/2006 © 2006 Nokia Corporation
Baseband Description and Troubleshooting
Measure voltage at
PHONE_ON (TP221
on main board and
TP2221 on sub
NO
board) (2.8V).
Is it high?
YES
Measure voltage at
PHONE_ON when
power key is pressed.
Is it Low?
NO
Replace
Keymat
Check FPC
NO
Connention. If OK,
change PM6610
Retest
YES
Company Confidential
7088 (Flower)
Page 41