Nokia 6310 Service Manual 7 npe 4 trouble
Programmes After Market Services
NPE-4 Series Cellular Phones
6 - Troubleshooting
Original ãNokia Corporation. Page 6-1
NPE-4
6 - Troubleshooting PAMS Technical Documentation
Table of Contents
Page No.
Introduction ...................................................................................................................................... 5
Baseband Troubleshooting ..................................................................................................... 5
Phone is dead ..................................................................................................................... 5
Flash programming doesn’t work ................................................................................. 7
Power doesn’t stay on, or phone jammed .................................................................. 8
Display information: “Contact service” ....................................................................... 9
The phone doesn’t register to the network or phone doesn’t make a call ......... 11
SIM failure .......................................................................................................................... 11
Display failure .................................................................................................................... 13
Keypad failure .................................................................................................................... 14
Audio faults ........................................................................................................................ 17
Charger faults .................................................................................................................... 19
Blue Tooth module faults ................................................................................................ 20
RF Troubleshooting .................................................................................................................. 23
Introduction ........................................................................................................................ 23
RF Key component placement ................................................................................ 24
RF Measurement points ........................................................................................... 25
PA Can ................................................................................................................... 25
Hagar RF can ....................................................................................................... 26
Abbreviations in fault finding charts ................................................................... 27
RF in general ....................................................................................................................... 28
EGSM Receiver ................................................................................................................... 29
General instructions for EGSM RX troubleshooting ......................................... 29
Fault finding chart for EGSM receiver ................................................................. 31
EGSM signal path ...................................................................................................... 31
RX/TX Switch ....................................................................................................... 31
Front-end .............................................................................................................. 32
Hagar ..................................................................................................................... 32
PCN Receiver ...................................................................................................................... 32
General instructions for PCN RX troubleshooting ............................................ 32
Fault finding chart for PCN receiver ..................................................................... 34
PCN signal path .......................................................................................................... 35
RX/TX Switch ....................................................................................................... 35
Front-end .............................................................................................................. 35
Page 6-2 ãNokia Corporation. Original
NPE-4
PAMS Technical Documentation 6 - Troubleshooting
Table of Contents
Page No.
Hagar ..................................................................................................................... 36
EGSM Transmitter ............................................................................................................. 36
General instructions for EGSM TX troubleshooting ......................................... 36
Path of the transmitted EGSM signal .................................................................. 38
Hagar ..................................................................................................................... 38
PA ............................................................................................................................ 38
RX/TX Switch ....................................................................................................... 38
Fault finding chart for EGSM transmitter ........................................................... 39
PCN Transmitter ................................................................................................................40
General instructions for PCN TX troubleshooting ............................................. 40
Path of the transmitted PCN signal ...................................................................... 41
Hagar ..................................................................................................................... 42
PA ............................................................................................................................ 42
RX/TX Switch ....................................................................................................... 42
Fault finding chart for PCN transmitter .............................................................. 43
Synthesiser .......................................................................................................................... 44
General instructions for Synthesiser troubleshooting ..................................... 44
26 MHz reference oscillator (VCTCXO) ................................................................ 45
VCO ................................................................................................................................ 46
Fault finding chart for PLL Synthesiser ................................................................ 46
PLL Blockdiagram ....................................................................................................... 47
Frequency lists ............................................................................................................ 48
EGSM ..................................................................................................................... 48
PCN ......................................................................................................................... 49
SMD Guidelines for PA ..................................................................................................... 50
Removal instructions ................................................................................................ 50
Attachment instructions .......................................................................................... 50
Phoenix tuning ................................................................................................................... 52
RF tuning after repairs ............................................................................................. 52
RX Calibration ............................................................................................................. 52
EGSM ..................................................................................................................... 52
PCN ......................................................................................................................... 54
RX Band Filter Response Compensation .............................................................. 56
EGSM ..................................................................................................................... 56
PCN ......................................................................................................................... 56
Original ãNokia Corporation. Page 6-3
NPE-4
6 - Troubleshooting PAMS Technical Documentation
Table of Contents
Page No.
RX Channel Select Filter Calibration .................................................................... 60
RX AM Suppression ................................................................................................... 62
EGSM ..................................................................................................................... 62
PCN ......................................................................................................................... 63
TX Power tuning ......................................................................................................... 65
EGSM ..................................................................................................................... 65
PCN ......................................................................................................................... 67
TX I/Q Tuning ............................................................................................................... 69
EGSM ..................................................................................................................... 69
PCN ......................................................................................................................... 73
Page 6-4 ãNokia Corporation. Original
NPE-4
PAMS Technical Documentation 6 - Troubleshooting
Introduction
This section is a summary of experiences the NPE-4 R&D team made during the development. It covers some errors or wrong configurations and their symptoms as well as
advice for problem solving. The section is seperated into two main parts the Baseband
troubleshooting and the RF troubleshooting, however, it is advisable to read both parts.
Baseband Troubleshooting
Phone is dead
This means that the phone does not use any current at all when supply is connected and/
or powerkey is pressed.
It is assumed that the voltage supplied is 3.6 VDC. The UEM will prevent any functionality what so ever at battery/supply levels below 2.9 VDC.
Original ãNokia Corporation. Page 6-5
NPE-4
6 - Troubleshooting PAMS Technical Documentation
Phone is dead
Yes
L260 towards SIM connector,
VBAT = 3.6 VDC
Yes
L261 towards C261,
L262 towards C262,
L265 towards C265
voltage = 3.6 VDC
Yes
Pin 2 and 4 on S300 = 0 VDC
when powerkey pressed
Yes
Sleep clock on J404
~32.768 Hz, 1.8 Vpp
Yes
PURX = 1.8 VDC on V130
(Bluetooth module) pin44
~1 sec. after power key is
pressed
No
No
No
No
No
Failure in VBAT
line, check:
X101, X102
Check:
L261,L262,L263,
C261,C262,C265
Check:
S300, PWB
Check:
B200,C209,C210,
D200,PWB
Check:
D200, PWB
Yes
VR3 ~2.78 VDC on C295
towards D200 (UEM)
Yes
13 MHz clock min 300
mVACpp on C424 towards
D200 with regular probe Cin
~10-13 pF/10M
Yes
Check:
D400 (UPP),D450 (FLASH)
No
No
Check:
D200,C295,PWB
Check:
C424,C425,L420,
C420,R420,N600
(HAGAR)
Page 6-6 ãNokia Corporation. Original
NPE-4
PAMS Technical Documentation 6 - Troubleshooting
Flash programming doesn’t work
The flash programming can be done via the pads on the PWB or via system connector
X100.
In production, the first programming is done via the pads on the PWB.
The main differences between these are:
a) Flash programming voltage is produced different way.
b) Signal routings are different.
In case of Flash failure in FLALI station, problem is most likely related to SMD problems.
Possible failures could be Short circuiting of balls under µBGAs (UEM, UPP, FLASH). Missing or misaligned components.
In flash programming error cases the flash prommer can give some information about a
fault.
The fault information messages could be:
- Phone doesn't set FBUS_TX line low
The preliminary fault-finding diagrams for flash programming are shown in the next
page.
Because of the use of uBGA components it is not possible to verify if there is a short circuit in control- and address lines of MCU (UPP) and memory (flash).
Original ãNokia Corporation. Page 6-7
NPE-4
6 - Troubleshooting PAMS Technical Documentation
Flash programming
Flash programming doesn't work
If fault information from Prommer is:
Phone doesn't set FBUS_TX line low
Yes
Check the connections:
X100 p11 - R101
X100 p12 - R104
X100 p13 - R100
Connection ok?
Yes
Try reading MCU ID
with Phenix
Reading ok?
Yes
Try reading Flash ID with
Phenix
reading ok?
Yes
Flash again
No
Solder / replace faulty
component
No
Replace either UEM or UPP
No
Replace Flash
Power doesn’t stay on, or phone is jammed
If this kind of failure is presenting itself immediately after FLALI, it is most likely caused
by ASICs missing contact with PWB.
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. Unfortunately, the
service routine can not be measured.
Page 6-8 ãNokia Corporation. Original
NPE-4
PAMS Technical Documentation 6 - Troubleshooting
Power doesn't stay on or
phone is jammed
Yes
Sleep clock on J404
~32.768 Hz, 1.8 Vpp
Yes
PURX = 1.8 VDC on V130
(Bluetooth module) pin44
~1 sec. after power key is
pressed
Yes
UI functionality and keys react
to pressure
Yes
13 MHz clock min 300
mVACpp on C424 towards
D200 with regular probe Cin
~10-13 pF/10M
Yes
TBA
No
No
No
No
Check:
B200,C209,C210,
D200,PWB
Check:
D200,PWB
Check:
D400,D450,Z300,
Keymat,
Lightguide,PWB
Check:
C424,C425,L420,
C420,R420,N600
(HAGAR)
Display Information: “Contact Service”
When this error appears in the display, it means that one or more of the internally Baseband tests has failed. The Baseband tests (selftests) are performed each time the phone is
powered on. The selftests are devided into those performed while powering up (Start up
tests), and the ones that can be executed with a PC using Phoenix (Runtime tests). The
following Start-up tests are performed during power up:
UPP Register verfication test.
UEM CBUS Interface test.
SleepX loop test.
Aux. Data loop test.
Ear Data loop test.
Tx IDP loop test.
Tx IQ DP loop test.
SIM Clock loop test.
Original ãNokia Corporation. Page 6-9
NPE-4
6 - Troubleshooting PAMS Technical Documentation
SIM I/O Control loop test.
SIM Lock test.
PMM (Flash) Validity test.
PMM (Flash) Checksum test.
If all these selftests are passed, the phone will start-up.
From Phoenix it is possible to run all the selftest and the additional "Runtime test". The
test cases can be seen below.
Page 6-10 ãNokia Corporation. Original
NPE-4
PAMS Technical Documentation 6 - Troubleshooting
The phone doesn’t register to the network or phone doesn’t make a call
If the phone doesn't register to the network, the fault can be in either BB or RF. Due to
the highly module design of the BB area, very few signals can be measured.
Phone doesn't register to network
or phone doesn't make a call
Yes
C292 towards D200 (UEM) ~4.75 VDC
C294 towards R308 ~2.78 VDC
C295 towards UEM ~2.78 VDC
C296 towards V311 ~2.78 VDC
C297 towards UEM ~2.78 VDC
C298 towards R307 ~2.78 VDC
C299 towards V311 ~2.78 VDC
C288 towards R306 = 1.35 VDC
C289 towards UEM = 1.35 VDC
all during GSM frame. Use TXP on J760.
No
Check:
D200, D400,PWB
Yes
Check RF serial bus:
RFBUSCLK on J731/J735
RFBUSDA on J732/J76
RFBUSEN1X on J730/J734
Transitions "1" <-> "0",
1.8 VDC <-> 0 VDC during GSM frame
Yes
Check analog signals during
GSM frame (Rx slot):
RXINP on C724 towards C716 = 0-1.45 VDC
RXQINP on C725 towards C716 = 0-1.45 VDC
Yes
Check analog common mode signals during
GSM frame (Tx slot):
TXIOUTP on R764 pin 1 towards R766 and
TXIOUTN on pin 3 = 1-1.75 VDC
TXQOUTP on R766 pin 1 towards R764and
PXQOUTN on pin 3 = 1-1.75 VDC
Yes
No
No
No
Check:
D400,PWB
Check:
D200,D400,PWB
Check:
D200,D400,R764,
R766,PWB
Check RF
SIM Failure
The hardware of the SIM interface from UEM (D200) to the SIM connector (X386) 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".
Original ãNokia Corporation. Page 6-11
NPE-4
6 - Troubleshooting PAMS Technical Documentation
The error ”SIM card rejected” means that the ATR message received from SIM card is corrupted, e.g. data signal levels are wrong. The first data is always ATR and it is sent from
card to phone.
SIM Fault
Measure
VSIM at
X386. Is it
3V?
Yes
Check SIM power-up
sequence
Check SIM
No No
reader X386
Measure
VSIM at
C302. Is it
3V?
Yes
Replace R388
UEM FAILURE
VSIM
Reset
Clock
Data
Page 6-12 ãNokia Corporation. Original
NPE-4
PAMS Technical Documentation 6 - Troubleshooting
Display Failure
Display
Fault
Is
display
working
Yes
No
Change
display
module
Is
display
working
Yes
No
Measure
Vflash1 is
2,78V
Yes
Measure
Vio is
1,8V
Turn phone off and
No
No
ohm measure
between Vflash1
and ground.
UEM FAILURE
Turn phone off and
ohm measure
between Vio and
~46k ohm
ground.
0 ohm
0R
Check C239, C279,
C304, C309, C350
R174, R202 and R352.
Check C207, C218,
C303, C404, C405,
C450, C451 and R173.
OK
Measure
Vout at
C302 is
~10,7V
UPP FAILUREEND
Yes
Yes
UEM FAILURE
No
Check C302
~510k ohm
OK
OK
Original ãNokia Corporation. Page 6-13
NPE-4
6 - Troubleshooting PAMS Technical Documentation
Keypad Failure
Power key failure
Keypad
fault
Power Key
OK?
Yes
No
Voltage on S300
approx = Vbat
Yes
Voltage on S300
while pressed
approx = Vbat
Yes
S300 ok ?
No
No
No
Check C312 and
Z300
If Ok ->
UEM fail
Phone
jammed
Change S300
Yes
Keypad
fault 2
Page 6-14 ãNokia Corporation. Original
Phone
dead
NPE-4
PAMS Technical Documentation 6 - Troubleshooting
Volume key failure
Keypad
fault 2
Volume UP key
OK?
Yes
Volume DOWN key
OK?
No
No
Check S301 with
Ohmmeter
S301 short?
Yes
Check S302 with
Ohmmeter
S302 short?
No
No
Replace S301
If still fail
Replace Z300
If still fail->
UPP failure
Replace S302
If still fail
Yes
Keypad
fault 3
Yes
Replace Z300
If still fail->
UPP failure
Original ãNokia Corporation. Page 6-15
NPE-4
6 - Troubleshooting PAMS Technical Documentation
Keyboard failure
Keypad
fault 3
Keyboard
OK?
Yes
END
No
Replace light guide
OK now?
Yes
END
No
Replace Z300
if still fail ->
UPP failure
Page 6-16 ãNokia Corporation. Original
NPE-4
PAMS Technical Documentation 6 - Troubleshooting
Audio faults
Earpiece doesn't work
and there isn't any
mechanical problem
Replace Earpiece
Ok
Check L158, R171 (and
C150 and R156 for
Shortcircuit)
Ok
UEM FAILURE (D200)
Headset microphone doesn't work
and there isn't any
mechanical problem
Microphone doesn't work
and there isn't any
mechanical problem
Replace Microphone
Ok
R150 towards UEM (bias) = 2.1V UEM FAILURE (D200)
R151 towards miclines (bias) = 1.0-
Check MIC line to UEM:
L155, R153,C156, C155, R151,
Ok
Yes
1.4 V
Yes
C154, R152
No
Check R150, R151,
No
V158, C151, C153,
C152
Ok
UEM FAILURE (D200)
R162 towards UEM (bias) = 2.1V UEM FAILURE (D200)
R163 towards miclines (bias) = 0.8-
Check XMIC line to UEM:
L168, R167, C168, C167, C166,
C165, R166, C164, R165
Ok
Yes
1.4 V
Yes
No
Check R162, R163,
No
V151, C160, C162,
Ok
UEM FAILURE (D200)
C161
Original ãNokia Corporation. Page 6-17
NPE-4
6 - Troubleshooting PAMS Technical Documentation
Headset earpiece doesn't work
and there isn't any
mechanical problem
With headset connected,
measure C177 and C178
towards UEM - DC level 0.8V.
Press keypad tone 5 and
measure with oscilloscope. An
AC signal pressents.
OK
Not OK
UEM FAILURE
Buzzer doesn't work
and there isn't any
mechanical problem
Measure C158 towards N150
with an oscilloscope. Same
AC signal present (higher
level).
OK
Measure R179 towards UPP
- DC level > 1.5V
OK
Check L150, R183, C158
(and C159, R161 for
Shortcircuit)
OK
Check R176, C179, R177,
R178, R180, C176, C177
and C178.
Not OK
Not OK
Vibra doesn't work
and there isn't any
mechanical problem
BOOMER FAILURE
UPP FAILURE
Check vibra
Replace Buzzer
Ok
UEM FAILURE (D200)
Check L307, C307, C308
UEM FAILURE (D200)
Ok
Ok
Page 6-18 ãNokia Corporation. Original
NPE-4
PAMS Technical Documentation 6 - Troubleshooting
Charger failure
Phone is off - battery is completely empty
(~3.1 VDC) and no current is drawn from
charger when connected
Yes
Check:
VCHAR > 2.1 VDC on L100 towards C107
Yes
D200 UEM is
faulty
Phone is on or off - battery has norminal
voltage 3.6 VDC and no current is drawn from
charger when connected
Yes
VCHAR > 2.1 VDC on L100 towards C107
Yes
No
No
F100, L100, V101,
C107
Check:
F100, L100, V101,
C107
Check:
D200, D400
Display information when charger connected:
"Not charging"
Yes
Voltage on R240 towards D200 (UEM)
~0.8 VDC when power is connected. BSI
value must be 39K (BPS-2, BLS-2)
Yes
Voltage (Use Scope) on R220 towards D200
(UEM) ~0.9 VDC at peak. BTEMP value must
be 47K.
Yes
Voltage on R200 towards D200 (UEM) same
as VBAT voltage
Yes
Voltage slowly rises on R200 towards D200
(UEM) when charger is connected
No
No
No
No
Check:
X101,
R202,R240,C240
Check:
X102,R202,R220,
C220
Check:
R200, D200
Check:
D200, PWB
Yes
Check:
PWB
Original ãNokia Corporation. Page 6-19
NPE-4
6 - Troubleshooting PAMS Technical Documentation
Blue Tooth module faults
Flashing fails
V130 P52, P53, P54
VBAT = 3,6V
Yes
V130 P6, L133 P2
VREG = 2,7 - 2,86V
Yes
V130 P32, P49, P18
VAPPL = 1,7 - 3,3V
Yes
V130 P50
SYSCLK 0,5 - 0,8Vampl
26MHz (10ppm)
Yes
V130 P26
SLEEPCLK = 1,8V
32,768kHz (5%)
No
No
No
No
No
None easy
accessable
Failure in VBAT line
check X101 and X102
Faulty PWB or UEM
Faulty PWB or UEM
Faulty PWB or N600
Faulty PWB or UEM
Yes
V130 P34
CBUS_Enx = 0V
When bus is active
Yes
V130 P36
CBUS_CLK = 1,8V
1MHz
Yes
V130 P35
CBUS_Da = 1,8v
Data
Yes
V130 P37
LPRFint = 1,8v
Pulses of approx. 20ms
When BT is on in UI
Yes
No
No
No
No
Faulty PWB or UEM
Faulty PWB or UEM
Faulty PWB or UEM
Faulty PWB or UEM
Replace module
Page 6-20 ãNokia Corporation. Original
NPE-4
N
N
N
t
NoN
N
N
N
PAMS Technical Documentation 6 - Troubleshooting
o BT air connection
Antenna open circui
Yes
Faulty PWB
o BT audio connection
J143
USARTTx = 1,8V
Data
Yes
J144
USARTRx = 1,8V
Data
Yes
o
o
o
V130 bad soldering
V130 bad soldering
V130 bad soldering
o
o
Replace module
V130
Replace module
V130
Replace module
V130
Faulty PWB
Original ãNokia Corporation. Page 6-21
NPE-4
N
N
K
N
N
6 - Troubleshooting PAMS Technical Documentation
RF Fail
The problem is most likely RF related
if the following conditions are
fulfilled.
Module can be flashed and BER
·
Test can be initiated.
BER is above limit or no
·
connection to BT-Box
Visual soldering inspection Re-solder
O
Measure SYSCLK > 200 mVpp
Reference: 11pF probe.
ote: The measured result can depend
very much on the probe type.
Tip: If nessesary, measure a known
good prototype with the same probe.
YES
Measure Vreg » 2.8 volts
YES
Replace MCM
Re-flash BT only
ot OK
O
O
VCTCXO or Buffer failure
See RF troubleshooting document
Check VFLASH1 & L133
Test points can be seen in the document “Baseband testpoints”.
Page 6-22 ãNokia Corporation. Original
NPE-4
PAMS Technical Documentation 6 - Troubleshooting
RF Troubleshooting
Introduction
Measurements should be done using Spectrum Analyzer with high-frequency highimpedance passive probe (LO-/reference frequencies and RF-power levels) and Oscilloscope with a 10:1 probe (DC-voltages and low frequency signals).
The RF-section is build around one ASICS Hagar (N600). For easier troubleshooting, this
RF troubleshooting document is divided into sections.
Before changing Hagar, please check the following things: Supply voltages are OK and
serial communication are coming to Hagar (See Baseband troubleshooting document).
Please note that the grounding of the PA-module is directly below PA-module so it is
difficult to check or change. Most RF semiconductors are static discharge sensitive!
So ESD protection must be taken during repair (ground straps and ESD soldering irons).
The Hagar IC is moisture sensitive so parts must be pre-baked prior to soldering.
Apart from key-components described in this document here are a lot of discrete components (resistors, inductors and capacitors) which troubleshooting is done by checking if
soldering of the component is done properly, for factory repairs (checking if it is missing
from PCB). Capacitors can be checked for shortening and resistors for value by means of
an ohmmeter, but be aware in-circuit measurements should be evaluated carefully.
Please be aware that all measured voltages or RF levels in this document are rough
figures. Especially RF levels varies due to different measuring equipment or different
grounding of the used probe.
All tuning must be done with Phoenix Service Software, version 02.90.001, or later.
Original ãNokia Corporation. Page 6-23
NPE-4
6 - Troubleshooting PAMS Technical Documentation
RF Key component placement
Reference
number
N600 HAGAR RF IC X802 RF Connector
N840 PA L836 Directional Coupler
Z610 PCN RX SAW filter V830 Detector Diode
Z620 EGSM RX SAW filter X101 Battery Terminal V+
Z650 EGSM TX SAW filter X102 Battery Terminal V-
Z804 RX DUAL SAW filter G630 VCO
Z802 RXTX Switch Module G740 VCTCXO
T660 PCN TX Balun T630 VCO Balun
V810 PCN RX LNA C840 Supply Capacitor
V820 EGSM RX LNA V130 Bluetooth Module
X800 Antenna signal clip A002 HAGAR RF Can
X801 Antenna ground clip A003 PA Can
Name
Reference
number
Name
Page 6-24 ãNokia Corporation. Original
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