Nokia 3210 Repair Manual page 33

Customer Care Europe & Africa
Technical Services Training Group
INTERNAL AUDIO FAULTS
L202, L203 faulty
Check resistance from L202, L203 to speaker pads normal 0Ω.
Check resistance from L202, L203 to GND and between both lines, Normal: high resistance range >1MΩ.
Speaker -
No, quiet or distorted received audio signal.
Check mechanical condition of speaker.
Check resistance of speaker - around 30Ω.
Microphone –
No, quiet or distorted transmitted audio signal.
Check contact pads of microphone.
Check resistance of microphone - around 800Ω.
Check microphone voltage 1.7VDC at C242
Check audio signal at C258 and C259.
X503 – Bottom connector
Check microphone contact springs in connector.
Check contact springs to the board. Change connector if bent.
Clean the contact pads on PCB.
N200 COBBA faulty
Check VBB 2.8VDC at C117 near CCONT.
Check VCOBBA 2.8VDC C248 near COBBA.
Check COBBACLK 3.6Vpp at J201 - see diagram at page# 41.
Check COBBARESET impulse during initialization routine at J343 (see diagram "COBBA RESET").
Change COBBA (if not underfilled) and rewrite IMEI and SIMlock data.
If error persists - MAD or PCB might be the reason.
SWAP the unit because MAD is not changeable.
Note:
Rewrite SIMlock and IMEI entries with Nokia Security Password and make a SW-update or send these
phones to a higher level NOKIA Service Center!
© 2001 Nokia Mobile Phones
CONFIDENTIAL
NSE-8/9
Date: 05.09.2001
(use WinTesla/ Testing/ Audio/ internal/ Loop on).
Checked by:
CC Training Group
33 (48)
Repairhints
Version 5.0 Approved
Approved by:
Technical Services