Nokia NME-2A Series - Flash Programming OK; Part 3

P.A.M.S.
Technical Documentation
NME–2A
Troubleshooting Instructions
Page 8
Original 08/97
Flash Programming OK; part 3
EEPROM
initialization OK?
(FLASH8N.MES)
D253/EEPROM
YES
3
MBUS registration OK?
Display: selftest failed?
D253/EEPROM
/pin 27/EROMSELX pulses
+5 to 0 V during r/w
action?
Check D300
NO
NO
4
/pin 1/RSTROBEX pulses
+5 to 0 V during r/w
action?
D253/EEPROM
/pin 1/WSTROBEX pulses
+5 to 0 V during r/w
action?
YES
Check D250
NO
(D300)
Check D250
(D300)
Change D253
NO
YES
YES
YES
YES