User Guide

TROUBLESHOOTING
9526ARo
6–2–9
NHC–4
Technical Documentation
Copyright  Nokia Mobile Phones
Troubleshooting Diagram; Flash Programming OK, part 3
EEPROM
initialization OK?
3
MBUS registration OK?
Display: selftest failed?
NO
4
D307 EEPROM
/pins 5,6/SDA/SCL pulses
+5 to 0 V during r/w
action?
Check D302,
R320,R321
Change D307
NO
YES
YES
YES
YES