Flashing Troubleshooting - Nokia 3155i Troubleshooting Manual

3155/3155i (RM-41), 3152 (RM-61)
Baseband Description and Troubleshooting
Figure 3 shows the DA-47 flashing tool and Module Jig MJ-57.

Flashing Troubleshooting

When troubleshooting flashing problems, first make sure the signals from the FPS-8 to
the D2800 processor are functioning properly before replacing any component. Once
signals between production test points and the D2200 and the D2800 processor have
been checked, verify that the interface between D2800 processor and flash is correct.
While all the signals between D2800 processor and flash are not visible, the available
signals will help identify the components that may need to be replaced.
Signal voltage Signal voltage
levels are 2.78V levels are 2.78V
Production Production
Test Points Test Points
FBUS TxO FBUS TxO
MBUS MBUS
FBUS RxO FBUS RxO
When troubleshooting the flashing to diagnose and determine faulty components, check
the signals in the following sequence:
• Make sure the signals from the tester are making contact with the production
flash pads.
• Use Phoenix External to either program or erase a mobile terminal that is not
working. This allows you to monitor the signals form the FPS-8 to the D2800
processor.
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Figure 3: DA-54 Flashing Tool and MJ-57 Module Jig
Signal voltage Signal voltage
levels are 1.8V levels are 1.8V
UEMEK UEMEK
MBUS Tx MBUS Tx
MBUS Rx MBUS Rx
FBUS Tx FBUS Tx
FBUS Rx FBUS Rx
D2200 D2200
Figure 4: Flashing diagram
©2005 Nokia Corporation
Signal voltage Signal voltage
levels are 1.8V levels are 1.8V
D2800 D2800
FLSCSX FLSCSX
EXTRDX EXTRDX
EXTWRD EXTWRD
FLSCLK FLSCLK
D2800 D2800
Company Confidential
Flash Flash
Memory Memory
D3001 D3001
ISSUE 1 07/2005