User Guide

CONFIDENTIAL

6 (20)

Customer Care Europe & Africa NHM-7 / NPM-9 Repairhints

SCCE Training Group Version 2.0 Approved

 2002 Nokia Mobile Phones

Date 13.05.2002

Checked by:

SCCE Training Group

Approved by:

SCCE

X101

- check mechanical appearance of battery connector. Change part if it is bent, soiled or corroded.

S300

- check mechanical appearance of powerswitch, change if necessary.

- check voltage at S300, 3.8VDC in case that switch is not pressed. If voltage is not measureable or too low especially check

R301 and C312.

- if switch is pressed, voltage at S300 must decrease to 0V. Change switch if necessary.

B200

- check DC-voltages at C209 and C210, normally 0.5VDC. If voltages are not ok check C209/210 for shorts to ground. It also

is possible that UEM D200 is defect.

- if DC-voltages are ok but no 32.768kHz signal is measurable at C209/210 change the crystal B200.

Note that this signal must be always measurable if battery voltage is higher than 3.1VDC, even if phone is switched off! In

this case amplitude of 32.768kHz is a bit lower (700mVpp at C209, 550mVpp at C210).

D200

- check that output voltage lines of UEM rises to their supposed values (VIO 1.8VDC at C207, VCORE 1.8VDC at C208,

VANA 2.8VDC at C206 and VR3 2.8VDC at C227) after pressing the powerbutton. If no voltage is measurable at the different

capacitors, check VBATT 4VDC at Z260/261/262/263/264/265. Also ensure that PWRONX-line is ok and SLEEPCLK-oscillator

works properly. If only a single voltage line does not rise to its supposed value, check this line for shorts to ground. Probably

it is necessary to change the UEM. Note that you have to rewrite IMEI and SIMlock data after changing this part!

If all voltages are ok but phone does not switch on, try to flash the phone. In case of any failuremessage during flashing

continue with the corresponding chapter on page 9.

D400

- check signals which are necessary for a working UPP such as VIO, VCORE, RFCLK, SLEEPCLK and PURX. If signals are ok

try to flash the phone. In case of any failuremessage during flashing continue with the corresponding chapter on page 9.

If flashing works but the phone still does not switch on, change UPP and reflash the phone once more.

D450

- in case that phone does not switch on while current consumption stays on 15mA (in Service jig supplied with 4VDC) this

indicates that Flash D450 probably is empty. Try to make SW-update. If any failuremessage appears during flashing, try

SW-update a second time. It also can be necessary to change D450. Note that in this case you have to rewrite IMEI,

SIMlockdata and Product code, furthermore you have to run all RX/TX-tunings and energy management calibration!