Nokia 7600 Service Manual 06 nmm3 trouble
Customer Care Solutions
NMM-3 Series Transceivers
6-Troubleshooting
Issue 1 (11/2003) Copyright 2003 Nokia Corporation Page 6-1
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6-Troubleshooting CCS Technical Documentation
Table of Contents
Page
No
Introduction to NMM-3 troubleshooting .............................................................................. 3
General guidelines for NMM-3 troubleshooting ................................................................. 3
Tools needed for troubleshooting .............................................................................. 3
General guidelines .......................................................................................................... 3
Nominal current consumption ................................................................................. 4
Diagnostics .................................................................................................................................... 5
Phone is Dead ..................................................................................................................5
Flash Programming Fault .............................................................................................. 6
SIM Card Fault .................................................................................................................7
Keypad Fault ..................................................................................................................... 8
Display Fault .................................................................................................................... 10
Illumination Fault ........................................................................................................... 11
Charge Fault ..................................................................................................................... 12
Accessory Fault ................................................................................................................13
Audio Fault ....................................................................................................................... 14
Camera Fault .................................................................................................................... 15
USB Fault .......................................................................................................................... 16
GSM900/1800 Tx Troubleshooting ............................................................................ 17
Helgo Troubleshooting .................................................................................................. 18
PA & Antenna Switch Troubleshooting .................................................................... 19
GSM Rx Troubleshooting .............................................................................................. 20
GSM1800 Rx Troubleshooting .................................................................................... 21
GSM900/1800 Synthesizer Troubleshooting .......................................................... 22
WCDMA Tx Troubleshooting ........................................................................................ 23
PA & DC-DC Converter Troubleshooting .................................................................. 24
WCDMA Rx Troubleshooting ....................................................................................... 25
WCDMA Rx Synthesizer Troubleshooting ................................................................ 26
WCDMA Tx Synthesizer Troubleshooting ................................................................. 27
GSM/WCDMA Antenna Troubleshooting ................................................................. 28
Test Points ...................................................................................................................................... 28
Calibration required when components changed ............................................................... 31
Tables
1 Baseband Components .................................................................................................. 31
2 WCDMA tuning alignments to be run when RF components are changed .... 31
3 GSM tuning alignments to be run when RF components are changed ........... 31
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CCS Technical Documentation 6-Troubleshooting
Introduction to NMM-3 Troubleshooting
This document is intend to be a guide for localizing and repairing electrical faults in the
NMM-3 device. First there is a brief guide for fault localizing. Then fault repairing is
divided into troubleshooting paths.
Before any service operation you must be familiar with the NMM-3 product and module
level architecture. You should also be familiar with the NMM-3 specified service tools
such as the Phoenix service software, flashing tools and software.
General guidelines for NMM-3 trouble shooting
Tools needed for troubleshooting
• Service tools (as listed at service tools chapter in service manual)
• Laboratory power supply with current indicator
• Oscilloscope
• Digital multimeter …
General guidelines
If the device cannot be turned on by any means, see “dead device” trouble shooting
Current consumption (missing consumption) gives an idea whether the device is able to
start up.
Dropping supply voltage or very large current consumption indicates a short circuit
Check whether the connection with Phoenix works and what can be discovered with
Phoenix (ADC-readings, baseband selftest, bb-calibrations etc.)
Check baseband selftests with Phoenix if “CONTACT SERVICE” is shown on the display.
Check visually display and rocker faults
Force phone to LOCAL mode and make keyboard test by phoenix
Check that board-to-board connector is OK, and connectors make good contacts.
If liquid damage, stop repairing!
Flash phone before disassembling it if fault is not obvious and Phoenix connection is OK.
Disassemble phone:
Try to locate failed module, is it Engine, UI or camera module.
Check failed module visually:
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6-Troubleshooting CCS Technical Documentation
Mechanical damages?
Solder joints OK?
Continue with specific trouble shooting procedure for the module:
If there is an obvious fault, repair it before reflashing the device
Flash first if a fault is not obvious
If flashing is not working go to flashing trouble shooting
Due to CSP packages short circuits or broken solder joints are not easily seen. If the
examined signal seems to be continuously in low or high level, then measure for possible
short circuit to ground (signal low) or to supply voltage (signal high) Note that if a problem is not found from any visible contact/component it can be under CSPs where the signal is connected.
Care must be taken when assembling and disassembling the transceiver. Failure to do
this may result in unnecessary damage to device.
Nominal current consumption
NOTE: Service tools need some amount of current to work.
The following current consumption values are measured from a complete NMM-3.
Vbatt = 3.6V
Measured nominal currents are drawn from the main battery.
Measurements have been made with a current probe connected to an oscilloscope.
Operating mode Current consumption
Idle 90 mA
2w audio call (backlights off) 350 mA
Viewfinder 260 mA
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CCS Technical Documentation 6-Troubleshooting
Diagnostics
Phone is Dead
Start
Is phone
current 0 mA?
No
Replace
R204
Will the phone
es
power-up in
Test or Local
mode?
Check BSI
No
circuit R204
OK?
With the phone in
LOCAL mode, using
Phoenix check battery
voltage, recalibrate if
necessary.
Is flash
programming
working?
No
es
es
es
Check X200
No
(contact and
solder joints).
OK?
Are VFLASH1 and
IO enabled
momentarily at
power up?
es
Check RF-CLK
at both sides
of C300. Is it
19.2MHz?
es
Possible
problem with
TIKU, UEME, or
Memories.
No
es
No
X200
Replace
UEME
D200
Check R822,
No
C300, C861,
Replace
C870 and
L899.
OK?
es
Replace
G820
No
Replace
defective
part.
Flash fault
End
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6-Troubleshooting CCS Technical Documentation
Flash Programming Fault
Start
Is the FBUS TXline HIGH after
startu
?
es
Is FBUS TX-line set
LOW after it has
been HIGH?
No
Measure BSIpulse during
flash operation.
OK?
Measure FBUS
TX-line during
flashing. Is it
~1.8V?
No
es
es
Check BSI circuit
No
including X200,
R204, R209, R214
and C226. OK?
No
Replace TIKU
D300
Check R403, if
OK replace
UEME D200.
es
Wrong
manufacture ID
and device ID
No
Possible short
circuit under TIKU
or program flash.
Replace or reflow
devices, Retest. OK?
es
End (reset)
es
No
Replace
Program
Flash D451
Phone is
dead
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CCS Technical Documentation 6-Troubleshooting
SIM Card Fault (Insert SIM / Card Rejected)
Start
Check SIM connector
makes good contact
to SIM X405. OK?
es
Set phone to
LOCAL mode. Is
it OK?
es
Measure VSIM
oltage on C405.
Is it ~3.0V?
No
No
No
Replace SIM
connector X405
Check BSI circuit
including X200, R204,
R209, R214 and C226.
If OK replace UEME
Measure FBUS
TX-line during
flashing. Is it
~1.8V?
es
Check SIM
power-up
sequence. Is it OK
es
Replace TIKU
D300
End
No
Check SIM lines, if
OK replace UEME
D200.
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6-Troubleshooting CCS Technical Documentation
Keypad Fault
Start
Is the power key
working?
es
Is the volume
up key
working?
No
Measure voltage
No
on S400 is it
hi
h?
Measure Voltage on
S400 when pressed.
Is it high?
Phone is
dead
Measure ROW5
line from S402.
Is it ~1.8V?
No
es
es
No
No
Check R432, R40
and R439 and
line, if OK,
lace UEME.
re
Check
S400 is
OK?
No
Replace S400
Check S402, R400
and R438, if it still
fails replace TIKU
D300.
es
Phone is
dead
es
Is the volume
down key
working?
es
es
Measure COL1 from
S402, when pressed, is
there a 50
s pulse?
es
Replace TIKU
D300
Measure ROW5
No
line from S403.
Is it ~1.8V?
es
Measure COL0 from
S402, when pressed, is
there a 50
s pulse?
es
No
No
No
Check S402, R400
and R436, if it still
fails replace TIKU
D300.
Check S403, R400
and R438, if it still
fails replace TIKU
D300.
Check S403, R400
and R437, if it still
fails replace TIKU
D300.
Continue
Replace TIKU
D300
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CCS Technical Documentation 6-Troubleshooting
Continue
Are the UImodule keys
working?
No
Replace the UImodule. Are keys
workin
now?
No
Check X400 solder
oints and spring
contacts. OK?
es
Measure ROW0 –
ROW5 lines from
X400. Are voltage
levels ~1.8V?
es
No
es
Retest the faulty
UI-module.
Replace
X400
No
End
Measure SLEEPX signal
on testpoint J301
when a key is pressed.
Is voltage level ~1.8V?
es
When a key is
pressed, do the
LED’s illuminate?
No
Illumination
Fault
No
Check ROW0 – ROW5
lines from X400. If OK
replace TIKU.
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6-Troubleshooting CCS Technical Documentation
Display Fault
Start
Replace display
module. Does the
display now work?
No
Check X400 and UI
connector X3
contacts and solder
oints. OK?
es
Measure VIO (1.8V)
and VFLASH1 (2.7V) at
X3. are they OK?
No
es
No
Replace display
module.
Replace
defective part.
Check
continuity of
IO and
FLASH1, and
es
Check for activity on
data, address, and WRX
lines and the RESX line
on power up. OK?
es
Are Display
LEDs
illuminatin
End
No
No
Replace TIKU
D300.
Illumination
Fault
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