User Guide

PAMS
Technical Documentation
NSE–5
Troubleshooting
Page 8
Issue 1 07/99
A
External RAM fault?
ID problem?
MCU FLASH Vpp
Error
No
NO
Unknown fault.
Try phone totally dead.
No
Check pins of SRAM (D302)
Check control lines of SRAM: RAMselX ...
Ye s
Check type of FLASH
Check soldering of FLASH
(Both FLASHES)
Yes
Check R146 for
connection to X201 pin
10 in one end and X201
pin 7 in the other end.
Check D100
Yes
Flashing from
X201?
Check R145 and R146
in both ends.
Voltage higher than
1.7V during
flashing?
Ye sNo
Defect FLASH or
flashing–SW has wrong
version.
Ye s
Defect MAD
MCUGENIO03 or
flashing–SW has wrong
version.
No
Figure 4.