Nokia n-gageqd Service Manual
Nokia Customer Care
6b - Baseband Troubleshooting
Company Confidential
RH-29
Issue 1 05/2004
Copyright ©
2004 Nokia Corporation
Page 15
Company Confidential
Power key troubleshooting
Clocks troubleshooting
Clocks include the following:
RF-clock
DBUS, CBUS clocks
Flash and SDRAM clocks
Sleep clock
Bluetooth clock
SIM clock
MMC clock
DBUS, CBUS clocks
Flash and SDRAM clocks
Sleep clock
Bluetooth clock
SIM clock
MMC clock
The main clock signal for the baseband is generated from the voltage controlled crystal
oscillator VCXO. This 26 MHz triangle wave clock signal is supplied to OSC_IN pin of
Mjoelner and out to UPPWD2. Inside UPPWD2 the clock frequency is divided to 13 MHz
oscillator VCXO. This 26 MHz triangle wave clock signal is supplied to OSC_IN pin of
Mjoelner and out to UPPWD2. Inside UPPWD2 the clock frequency is divided to 13 MHz
Phone cannot
be powered by
pressing pwr
key
Connect
charger, phone
is powered
up?
See dead device
troubleshooting
troubleshooting
Change power key
and retest
No
Yes