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Trouble Shooting Guide, Standard




Trouble Shooting Guide, Standard
Applicable for A2618s and A2618sc



Contents
1 Explanations ....................................................................................................................2
2 Network Problems...........................................................................................................5
3 On/Off Problems .............................................................................................................8
4 Audio Problems .............................................................................................................10
5 Display/Illumination Problems ....................................................................................13
6 Capacity/Charging Problems.......................................................................................17
7 SIM Problems................................................................................................................18
8 Key Problems.................................................................................................................20
9 Alert Problems...............................................................................................................21
10 Data Communication Problems...................................................................................22
11 Software Problems ........................................................................................................22
12 Other Problems .............................................................................................................23
13 Revision History ............................................................................................................24




4/00021-2/FEA 209 544/25 A Approved according to 1776-2/FEA 209 544
Trouble Shooting Guide, Standard




1 Explanations

1.1 Component Placement Reference
For component placement see doc.1078-2/FEA 209 544/25


1.2 Service Test Menu
Code to enter Service Test Menu, > * < < * < *


1.3 External connectors
External units are connected to the transceiver by means of an 11-pin connector on the bottom
of the phone.
The pin numbering is starting from the right when looking on the system connector with the
front up.



Pin Signal Function
1 DCIO DC+ pole for charging phone battery and external
accessory powering.

2 GND Digital GND and DC return.

3 VPPFLASH Flash memory Vpp /Service.

4 GND Audio signal GND, 0 V reference.

5 CFMS_PHFS Accessory Control From Mobile Station serial (ACB)
communication/ Portable Hands Free Sense.

6 CTMS Accessory Control To Mobile Station serial (ACB)
communication.

7 DFMS Data From Mobile Station, serial bus communication.

8 DTMS Data To Mobile Station, serial bus communication/
External accessory Power on

9 CTS_ON Mobile station Clear To Send/ ON REQuest

10 AFMS/RTS Audio from Mobile station/ Ready To Send

11 ATMS Audio to Mobile station




4/00021-2/FEA 209 544/25 A 2(24)
Trouble Shooting Guide, Standard




1.4 Abbreviations
B: Crystal.
C: Capacitor.
D: Digital circuit.
H: Buzzer, LED, and pads for display.
J: Connector.
L: Coil.
N: Analogue circuit, power amplifier at some units.
R: Resistor.
S: Keyboard pads.
V: Transistor, diode.
X: Contact surface on the circuit board.
Z: Filter.


DCIO: DC voltage through the system connector for charging.
GND: Ground.
RTC: Real Time Clock, the clock that keeps track of time.
SIMCONCLK: Signal from the processor used for communication to SIM, clock-signal.
SIMDCONAT: Signal from the processor used for communication to SIM, data-signal.
SIMCONRST: Signal from the processor used for communication to SIM, reset-signal.
SIM VCC: Feed voltage for SIM, 5.0