Nokia 3210 Repair Manual page 28

Customer Care Europe & Africa
Technical Services Training Group
CONTACT SERVICE FAILURES
D303 EEPROM faulty
Check using WinTesla if IMEI or product data are somehow corrupted.
Check 2.8VDC at pin 8 of EEPROM.
Do not use the option "Full factory set" with WinTesla. Otherwise the original IMEI will be changed to "65656565..."
Change EEPROM if it is permitted to you and rewrite all phone data (IMEI, product code...).
If you are not authorized to change EEPROM and the IMEI is missing, write a note with a short comment, and send it together
with the phone to a higher level NOKIA Service Center.
COBBA serial fail
After changing COBBA N200 – take care that all components in the periphery of COBBA are not shifted from their position!
Especially check R765, R766, R233 for the correct position.
CCONT interface failed
Remove Display and check selftest again. If failure persists, change CCONT and check for oxidized pads.
Flash update not possible
D301 FLASH / D302 SRAM - faulty or poor soldered
"Contact service " appears on LCD
WinTesla/Testing/Self tests
Check with
If "MCU ROM Checksum failed" appears or if the phone does not switch on:
Check current consumption. If continuously around 20mA, try to flash the phone.
If the fault remains after flashing:
Check soldering of SRAM D302
Change Flash D301 and try to flash the phone again.
If "MCU RAM Interface failed" or
if "MCU RAM Component failed" appears:
Check 32.768KHz Sleepclock squarewave at C145 (3Vpp).
Check 13MHz RFC at C301 (900mVpp).
Check VBB at C117 – 2.8VDC.
Resolder SRAM D302 and try to flash the phone.
If any error message appears during flashing ("External RAM error"), change SRAM D302 and retry.
If error message persists, change Flash D301 and flash again.
If the failure persists, probably MAD D300 or PCB faulty.
© 2001 Nokia Mobile Phones
CONFIDENTIAL
NSE-8/9
Date: 05.09.2001
– which of the MCU self test fails
Checked by:
CC Training Group
28 (48)
Repairhints
Version 5.0 Approved
Approved by:
Technical Services