Nokia 2300 Service Manual 06 rm4 troubleshot
Customer Care Solutions
Technical Documentation
T roubleshooting Instructions
ISSUE 1 02/2004 COMPANY CONFIDENTIAL 1
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
CCS Technical Documentation Troubleshooting Instructions
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2 COMPANY CONFIDENTIAL ISSUE 1 02/2004
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
Troubleshooting Instructions CCS Technical Documentation
Table of Contents
Page No
Baseband troubleshooting .............................................................................................5
Baseband testpads .......................................................................................................5
Component side (PWB backside) ............................................................................. 5
Display connector (PWB front side) ........................................................................ 5
Close up of testpads .................................................................................................. 6
Fault Finding Charts ...................................................................................................... 8
Phone is dead .............................................................................................................. 8
Flash programming does not work .............................................................................. 9
Power doesn't stay on or phone is jammed ............................................................... 10
Display information: "Contact Service" ....................................................................11
No network or no call ................................................................................................ 12
SIM related faults ......................................................................................................13
SIM-Card rejected ..................................................................................................14
Audio related faults ................................................................................................... 15
No sound in earpiece ..............................................................................................15
Microphone does not work .....................................................................................16
Headset microphone does not work ........................................................................ 17
Headset earpiece does not work .............................................................................17
No sound from IHF or headset ...............................................................................18
Handsfree speaker does not work ........................................................................... 19
Charging faults .......................................................................................................... 20
General RF Troubleshooting ....................................................................................... 23
RF Key component placement ..................................................................................24
General Instructions for GSM900 RX Troubleshooting ........................................... 26
Troubleshooting Chart for GSM900 Receiver .......................................................27
General Instructions for GSM1800 RX Troubleshooting ......................................... 29
Troubleshooting Chart for GSM1800Receiver ......................................................30
Measurement points in the receiver ........................................................................ 31
RM-4/RM-5 Transmitter troubleshooting ................................................................. 33
Measurement points for the transmitter .................................................................. 33
General instructions for RM4/RM-5 GSM TX troubleshooting ............................... 34
PCN Transmitter General instructions for PCN TX troubleshooting ....................... 36
Synthesizer ................................................................................................................ 37
26 MHz Reference Oscillator (VCXO ) .................................................................37
VCO ........................................................................................................................37
Troubleshooting diagram for PLL Synthesizer ......................................................38
Phone fails after power on ......................................................................................39
Measurement points at the VCXO .......................................................................... 39
Measurement points at the PLL/VCO ....................................................................40
Manual Alignment using Phoenix ............................................................................... 41
RX calibration ...........................................................................................................41
GSM1800 RX calibration .........................................................................................42
RX channel select filter ............................................................................................. 43
RX Band Filter Response.......................................................................................... 44
Tx Power tuning ........................................................................................................ 45
ISSUE 1 02/2004 COMPANY CONFIDENTIAL 3
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
CCS Technical Documentation Troubleshooting Instructions
TX power tuning GSM ...........................................................................................45
TX power tuning PCN ............................................................................................ 48
I/Q tuning .................................................................................................................. 50
RF control .................................................................................................................52
Call testing ................................................................................................................53
General instructions for RM-4/5 FM radio Troubleshooting ...................................... 54
Location of testpoints ................................................................................................ 54
Phoenix control ......................................................................................................... 54
Fault finding guide ....................................................................................................56
4 COMPANY CONFIDENTIAL ISSUE 1 02/2004
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
Troubleshooting Instructions CCS Technical Documentation
Baseband troubleshooting
Baseband testpads
Component side (PWB backside)
Figure 1: Component side (PWB backside)
Display connector (PWB front side)
Figure 2: Display connector (PWB front side)
ISSUE 1 02/2004 COMPANY CONFIDENTIAL 5
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
CCS Technical Documentation Troubleshooting Instructions
Close up of testpads
Production test pads for programming FLASH and service functions (J396)
RFBUS RF I/Q signals
6 COMPANY CONFIDENTIAL ISSUE 1 02/2004
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
Troubleshooting Instructions CCS Technical Documentation
FLASH
CBUS / DBUS / FBUS / MBUS / SLEEPX / PURX / AUDIO
SHUTDOWN
ISSUE 1 02/2004 COMPANY CONFIDENTIAL 7
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
CCS Technical Documentation Troubleshooting Instructions
Fault Finding Charts
Phone is dead
Nominal battery voltage is 3.7 VDC. The phone (UEM) wont startup at battery/supply levels below 3.1 VDC. The software will turn off the phone at 3.21 VDC.
Phone is dead
Yes
X105
VBAT = 3,6VDC
Yes
L260,L261,L262,L263,L264,L265
C260,C261,C262,C263,C264,C265
Voltage = 3,6VDC
Yes
J404
Sleep-clock is
32.768 kHz, 1,8Vpp
Yes
J402
PURX = 1,8VDC,
1 sec. after power-key
is pressed
Yes
C227
VR3 = 2,78VDC
No
No
No
No
No
Check :
X105
Check :
L260,L261,L262,L263,L264,L265
C260,C261,C262,C263,C264,C265
Check :
B200, C209, C210, PWB. Else
defective D200*
Check :
PWB.
Else defective D200*
Check :
C227, PWB.
Else defecti v e D200*
Yes
26 MHz clock min. 300mVACpp,
R426
probe Cin=10-13 pF/10M
Yes
No
Check :
C227, PWB.
Else defecti v e D200*
Check :
D450 (Flash).
Else defective D200*
8 COMPANY CONFIDENTIAL ISSUE 1 02/2004
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
Troubleshooting Instructions CCS Technical Documentation
Flash programming does not work
.
Flash prgramming
do not work
Error from prommer:
"Phone doesn't set
FBUS_TX line low"
Yes
J396, R108
Check connection between
pad 1,2 & 3 on J396
and R108
Yes
J409, J410, J411, J412
Voltage level at 1,8VDC
Yes
Try reading MCU ID
with Phoenix.
Reading OK?
Yes
Try reading Flash ID
with Phoenix.
Reading OK?
Yes
No
No
No
No
Check :
R108, PWB
Check :
PWB.
Else defective D200*
Check :
PWB.
Else defictive D400*
Check :
Replace D450
Reflash phone
ISSUE 1 02/2004 COMPANY CONFIDENTIAL 9
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
CCS Technical Documentation Troubleshooting Instructions
Power doesn't stay on or phone is jammed
If for some reason the MCU does not service the watchdog register within the UEM, the operations watchdog will run out after approximately 32 seconds and should initiate a reset.
Power doesn't stay on,
or phone is jammed
J404
Sleep clock = 32.768 kHz,
1.8Vpp
Yes
J402
PURX = 1,8VDC,
1 sec. after power-key is
pressed
Yes
UI functionality,
and keys react
to pressure?
Yes
R426
26 MHz clock min.
300mVACpp,
probe Cin=10-13 pF/10M
Yes
No
No
No
No
Check :
B200, C209, C210, PWB.
Else defective D200*
Check :
PWB.
Else defective D200*
Check :
D450, Keymat,
Lightguide, PWB.
Else defective D400*
Check :
C420, C426, R420,
R426, N600(Mjoelner)
Reflash phone
10 COMPANY CONFIDENTIAL ISSUE 1 02/2004
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
Troubleshooting Instructions CCS Technical Documentation
Display information: "Contact Service"
This message shows when internal self-tests have failed. If any of the following cases fails the
display will show the message: "Contact Service".
The lineup below has no chronological order. Use common sense and experience to decide
which test case to start error hunting at.
Display shows
"Contact Service"
Yes
EarDa & MicDa
between
UPP and UEM?
MBUS interface
between
UPP and UEM?
AuxDa & UEMInt
between
UPP and UEM?
SleepX & SleepClk
between UPP & UEM?
TXI/QD & RXI/QD?
SIM interface between
UPP & UEM
No
Check :
PWB.
Else defective D200*
or D400*
Key is stucked
Flash checksum
y ASIC version vs. compilation flag, PMM checksum
y PMM validity
y Warrenty Information State
y SIM-Lock
Check :
A-cover, Keymat, Lightguide,
PWB.
Reflash phone
Check :
PWB.
Else defective D450 (FLASH)
ISSUE 1 02/2004 COMPANY CONFIDENTIAL 11
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
CCS Technical Documentation Troubleshooting Instructions
No network or no call
If the phone doesn't register to the network, the fault can be in either BB or RF. Only few signals
can be tested since several signals is 'buried' in one or more of the inner layers of the PWB.
First of all check that it’s not a SIM LOCK causing the error by using a Test-SIM card and connect the phone to a tester.
Phone do not register to
network
or phone cannot make a call
C222, C223, C224, C225,
C226, C227
Voltage = ~2,78VDC
All during GSM frame-
call mode.
Use TXP on C646 as trigger
Yes
C230, C231
Voltage = ~1,35VDC
All during GSM frame (call mode)
Use TXP on C646 as trigger
Yes
J421, J422, J423
Check RF serial bus during
GSM-frame :
Logic HIGH = 1,8VDC
Logic LOW = 0VDC
RFBUSCLK (J421),
RFBUSDA (J422),
RFBUSEN1X (J423)
Yes
R601, R603
Check analog signals during
GSM-frame (RX slot):
RXIP/N (R601) = 0-1,45VDC
RXQP/N (R603) = 0-1,45VDC
No
No
No
No
C222,C223, C224, C225,
C226, C227, PWB.
Else defective D200 or D400*
C230, C231, PWB.
Else defective
D200* or D400*
Else defective D200*
Else defective D200*
Check :
Check :
Check :
PWB.
or D400*
Check :
PWB.
or D400*
Yes
R610, R611
Check analog signals during
GSM-frame (TX slot):
TXIP/N (R610) = 1-1,75VDC
TXQP/N (R611) = 1-1,75VDC
Yes
No
Check :
R610, R611,PWB.
Else defective D200*
or D400*
Check RF
12 COMPANY CONFIDENTIAL ISSUE 1 02/2004
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
Troubleshooting Instructions CCS Technical Documentation
SIM related faults
The hardware of the SIM interface from UEM (D200) to the SIM connector (X387) can be tested
without a SIM card. When the power is switched on the phone first check for a 1.8V SIM card
and then a 3V SIM card. The phone will try this four times, whereafter it will display ”Insert SIM
card”.
Display shows :
"Insert SIM Card"
Yes
Check :
X387
Verify that phone checks for
1,8V-SIM, and t h en 3V -SIM
during power-up.
(See illustration below)
Yes
No
X387, R386, PWB.
Else defective D200*
Message can also appear if
BSI signal from battery is not
present or only working
intermittently .
Please check BSI.
SIM Interface OK
Check for SIM voltage during power-up
Ch1: VSIM
Ch2: RESET
Ch3: CLOCK
Ch4: DATA
ISSUE 1 02/2004 COMPANY CONFIDENTIAL 13
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
CCS Technical Documentation Troubleshooting Instructions
SIM-Card rejected
Display shows :
"SIM Card Rejected"
Yes
VSIM = min. 1,6V(1,8V Card)
X387
VSIM = min. 2,8V(3V Card)
(See illustration below)
Yes
X387
ATR data can be seen at
SIM data pin.
Yes
SIM Interface OK
No
No
Check :
R386, PWB.
Else defective D200*
Check :
X387, R386, PWB.
For reference a picture with normal SIM power-up is shown below.
Normal SIM power-up sequence
Ch1: VSIM
Ch2: RESET
Ch3: CLOCK
Ch4: DATA
14 COMPANY CONFIDENTIAL ISSUE 1 02/2004
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RM-4/RM-5
Troubleshooting Instructions CCS Technical Documentation
Audio related faults
Earpiece = Speaker mounted in display assy.
IHF = Integrated handsfree. Speaker mounted in back cover (D-cover).
No sound in earpiece
Earpiece do not work
Replace :
Earpiece
Error still present
Z150, R161
Check Z150, R161 is
working correctly
(no short/open-circuit)
Yes
Defective D200*
(or PWB error)
No
Replace :
Z150 / R161
ISSUE 1 02/2004 COMPANY CONFIDENTIAL 15
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
CCS Technical Documentation Troubleshooting Instructions
Microphone does not work
Microphone do not work and
it's not a mechanical
problem
Z100
Check Z100 is
working correctly
(no short/open-circuit)
C101,C102 & C103
Check for short-circuit.
Error still present
R165
Check voltage level on
R165 towards UEM (bias)
= 2,1V
Yes
R153
Check voltage level on
R153 towards mic-lines (bias)
= 1,0V - 1,4V
No
No
No
No
Replace :
Z100
Replace :
C101, C102, C103
Check :
R165, C168, PWB.
Else defctive D200*
Check :
R152, R153, R155, R157,
R164, C151, C152, C153,
C154, PWB.
16 COMPANY CONFIDENTIAL ISSUE 1 02/2004
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RM-4/RM-5
Troubleshooting Instructions CCS Technical Documentation
Headset microphone does not work
Headset microphone do not
work and it's not a
mechanical problem
Check voltage level on R166
Check voltage level on R151
R166
towards UEM (bias) = 2,1V
R151
towards UEM (bias)
= 1,0V - 1,4V
R154, R156, R160,
R162, R168, C172,
C170, C173, C174,
Z101
Check XMIC line to UEM
(D200)
Error still present
Defective D200*
Headset earpiece does not work
Yes
Yes
No
No
No
Replace :
R166 and/or Z101
Check :
R166, R151, C171
Replace :
Defective component
Headset earpiece do not
work.
R183, Z102, C123,
C124
Check that components are
working correctly
Defective D200*
No
Replace :
R183 and/or Z102, C123,
C124
ISSUE 1 02/2004 COMPANY CONFIDENTIAL 17
Copyright © 2003 Nokia. All Rights Reserved.
RM-4/RM-5
CCS Technical Documentation Troubleshooting Instructions
No sound from IHF or headset
START
Insert headset
(working reference)
Clean PWB and system
connector (replace if
defect)
Risk of decreased phone
performance if PWB
pads are corroded or
badly scratched. Reliable
repair might be
impossible.
Clean/Replace
system connector
Check system
connector switch
Yes
Is there a
malfunction or
dirt in the
switch?
No
Check PWB and
connector springs
on the system
connector
Yes
Dirty, dusty,
scratched or
corroded?
Go to "Headset
earpiece do not
work".
No
Turn on radio and tune in
to a station (using menu
navigation). Increase
volume with navigation
key.
No
Sound in
headset?
Check IHF pads on
PWB and spring
contacts on IHF
speaker
Dirty, dusty,
scratched or
corroded?
No
Change IHF
speaker.
(working reference)
Yes
Sound in
IHF?
No
Yes
Yes
Enable radio
through loudspeaker
No
Sound in
IHF?
Yes
Distorted
sound?
Yes
Go to "Handsfree
speaker do not
work".
Clean PWB and IHF
speaker contact springs.
Risk of decreased phone
performance if PWB
pads are corroded or
badly scratched. Reliable
repair might be
impossible.
No
IHF OK
18 COMPANY CONFIDENTIAL ISSUE 1 02/2004
Copyright © 2003 Nokia. All Rights Reserved.
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