Nokia 2100 - Page 10

CONFIDENTIAL
10 (15)
Customer Care Europe, Middle East & Africa NAM-2 Repair Hints
Technical Services / SCCE Training Group Version 2.0 Approved
© 2004 Nokia Corporation
03/03/2004
© NMP 2004
Checked by:
SCCE
Approved by:
SCCE Training Group
Chapter 3: Flash update is not possible
Pre-check
First of all try to make a flash update. If flash update is not possible check flashing contact-pads for
dirt. If necessary clean them with an appropriate amount of alcohol.
Repair instructions
Disable watchdog by connecting R118 to ground, and try to update again. If fault remains, check
the following voltages:
VBB 2.8VDC at C107
VCORE 1.8VDC at C140
VXO 2.8VDC at C152
SLEEPX 2.8VDC at J226
PURX 2.8VDC at J227
13MHz system clock at C213, 1Vpp sine wave
If only one of the above mentioned signals is not measurable, in all probability CCONT N100 is
faulty, but not changeable due to underfilling.
In case that all above mentioned signals are ok but fault persists; check MBUS/FBUS-lines for shorts
to ground:
check MBUS-line (J103) to GND: ~ 50k Ohm
check FBUS_RX-line (J102) to GND: ~ 220k Ohm
check FBUS_TX-line (J101) to GND: ~ 70k Ohm
To ensure function also check resistors R109, R201, R203 and R215. If these parts are ok but SW-
update still is not possible, in all probability MAD D200 is faulty, but not changeable due to
underfilling.
If “Algorithm code fail / alias ID missing” is the failure message during flashing, update your
prommerbox, and try to flash the phone again. If fault persists even though the prommerbox has
been updated, in all probability combo memory is faulty. Save phone data if possible, exchange
D210 with µBGA rework station, and try to perform SW-update once more.
In case of failure message “External RAM failure” in all probability combo memory D210 is faulty.
Exchange D210 with help of µBGA rework station and try to flash the phone again.
Remember that it is necessary to rewrite phone data and perform baseband/RF-tunings after
changing D210!
Note that you have to rewrite IMEI and SIM lock data. Furthermore you have to run all
RX/TX-tunings and energy management calibration after changing combo memory (D210).