Nokia 8310 Repair Hints page 5

Customer Care Europe & Africa
SCCE Training Group
© 2002 Nokia Mobile Phones
CHAPTER 1 PHONE DOES NOT SWITCH ON
Phone does not switch on
Check if
current consumption
is higher than
1 Ampere
no
check if
current consumption
is around 15mA
(in Servicejig supplied with
4VDC)
no
check VBATT
4VDC at both sides of Z260-
Z265
OK
check 32.768kHz
at C209/210
OK
check that
PWRONX decreases to 0V if
powerswitch is pressed
OK
check that
VIO, VCORE, VANA, VFLASH1
and VR3 rise to their intended
values
OK
check 13MHz reference clock at
R420
OK
Check PURX 1.8VDC at J402
Try to flash the phone.
If SW-update does not work,
continue with chapter
"Flash update not possible"
© NMP 2002
Usually N700 faulty
yes
(remove L703 to ensure)
Try to make SW-update,
continue with section
yes
"Flash update not possible" if
not ok
Check X101, also check
resistance of Z260-Z265
nOK
(0 Ohm)
change B200,
nOK
also check C209/210.
Probably D200 faulty
check / change
nOK
S300, R301
check lines for shorts to ground
or interruption, change UPP if
nOK
necessary
Check / change
nOK
G660, N600
UEM D200 faulty in all
nOK
probability
CONFIDENTIAL
NHM-7
Date 28.02.2002
Checked by:
SCCE Training Group
5 (18)
Repairhints
Version 1.0 Approved
Approved by:
SCCE