Nokia NME-2A Series - Flash Programming OK; Part 1

P.A.M.S.
Technical Documentation
NME–2A
Troubleshooting Instructions
Page 6
Original 08/97
Flash Programming OK; part 1
YES
FLASH programming OK
MBUS
registration
OK?
Display:
selftest failed
D250/MCU/pin 3
D300/ASIC/pin 97
rstrobe
Power
stays on?
YES
YES
NO
Display:
selftest failed
NO
Short circuits in data
data lines. data line
disconnected, VREF
unconnected
MBUS line X100/5
+5 V after pwr on?
R263
+ 5 V?
VBATT
pins 4, 16 ?
Check X102
N100/pin 8/XRESET
+5 V after pwr on?
C114 OK?
R106 OK?
Change N100
MCU/D250/PIN67/RDX
+5 V after pwr on ?
NO
If D250 at
pin 66/TXD
doesn’t apply
+5 V change
D250
V250 base
∼1 V
Check
R262, R263
V250, V251
Check R257
R260, R258,
V250, R268,
Change first
D250
If R259 is OK
change D250
NO
NO
NO
Power supp. to the logic
circuits +5 V after pwr on?
Change N100
NO
NO
YES
YES
YES
NO
YES
YES
YES
NO
YES
YES
2
3
YES
R270