Nokia NHL-2NA Series Guide

CCS Technical Documentation
NHL-2NA Series Transceiver
Issue 1 07/02 Copyright ¤Nokia. All rights reserved
Troubleshooting Instructions

NHL-2NA
Troubleshooting Instructions CCS Technical Documentation
Page 2 Copyright ¤Nokia. All rights reserved. Issue 1 07/02
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CCS Technical Documentation NHL-2NA
Issue 1 07/02 ¤Nokia Corporation Page 1
Table of Contents
Baseband Troubleshooting............................................................................................. 1
Introduction ..................................................................................................................1
General guidelines for NHL-2NA system troubleshooting .........................................1
Tools needed for troubleshooting.............................................................................. 1
General guidelines..................................................................................................... 1
Nominal current consumption................................................................................... 2
Troubleshooting paths .................................................................................................4
Dead or jammed device............................................................................................. 4
Partially damaged device .......................................................................................... 5
Most common symptoms reported by customer....................................................... 5
Contact the retailer” on display................................................................................. 6
LG4 Baseband HW subarea troubleshooting ..............................................................8
Flashing troubleshooting........................................................................................... 8
Energy management troubleshooting ........................................................................10
Device does not stay on........................................................................................... 10
General power checking......................................................................................... 10
SMPS of AEM troubleshooting .............................................................................. 12
Power key troubleshooting...................................................................................... 13
Clocks troubleshooting............................................................................................ 14
Charging checking................................................................................................... 17
Energy management calibration.............................................................................. 20
ADC-reading........................................................................................................... 21
Backup battery......................................................................................................... 21
IR interface ................................................................................................................23
Sensors troubleshooting .............................................................................................25
Proximity Detector .....................................................................................................26
General notes........................................................................................................... 26
Proximity Detector components.............................................................................. 26
Handsfree shuts down automaticallly in sunshine .................................................. 27
PD calibration.......................................................................................................... 27
Troubleshooting with PD Calibration results.......................................................... 28
Ambient Light Detector .............................................................................................32
General Notes.......................................................................................................... 32
Ambient Light Detector .......................................................................................... 33
Problems from the user point of view..................................................................... 34
SIM card ....................................................................................................................38
"Insert SIM Card" in device display allthough card is inserted .............................. 41
Audio .........................................................................................................................42
Microphone ............................................................................................................. 42
Earpiece................................................................................................................... 43
IHF .......................................................................................................................... 44
Accessory detection troubleshooting ...................................................................... 45
Memory troubleshooting ...........................................................................................46
Baseband serial interface troubleshooting .................................................................47
CBUS ...................................................................................................................... 47

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FBUS....................................................................................................................... 49
MBUS...................................................................................................................... 49
Hall sensor troubleshooting .......................................................................................50
Display backlights troubleshooting ...........................................................................51
Bluetooth troubleshooting .........................................................................................52
Needed actions if ASIC is changed.............................................................................. 54
UEM changed ............................................................................................................54
AEM changed ............................................................................................................54
UPP_WD2 changed ...................................................................................................54
Flash0 changed ..........................................................................................................54
RF component changed .............................................................................................54
Test points and pin orders............................................................................................ 55
Test points in BaseBand area (LG4_06_02) ..............................................................55
Connectors pin order ..................................................................................................57
UI-connector............................................................................................................ 57
Board to board connector........................................................................................ 59
Pin order of spring connectors ................................................................................ 59
RF Troubleshooting ....................................................................................................... 1
Introduction ..................................................................................................................1
RF Key component placement .....................................................................................2
Fault finding test point locations .................................................................................3
Receiver .......................................................................................................................4
General description ................................................................................................... 4
E-GSM900 ................................................................................................................ 5
GSM1800.................................................................................................................. 8
Picture of RX signal................................................................................................ 10
Transmitter .................................................................................................................11
General description ................................................................................................. 11
E-GSM900 .............................................................................................................. 12
GSM1800................................................................................................................ 13
Fault finding tree..................................................................................................... 14
Example of TX signals............................................................................................ 15
Common ....................................................................................................................17
Antenna switch control logic (reference Z672)....................................................... 17
VCTCXO (reference G591).................................................................................... 17
Frequency synthesizer............................................................................................. 18
HAGAR................................................................................................................... 21
PA and Antenna switch........................................................................................... 22
Receiver tunings ........................................................................................................23
RX Channel Select Filter Calibration...................................................................... 23
RX Calibration ...........................................................................................................24
RX Band Filter Response Compensation ..................................................................28
RX AM Suppression ..................................................................................................33
Transmitter Tunings ...................................................................................................36
TX I/Q Tuning......................................................................................................... 36
TX Power Level Tuning.......................................................................................... 38
Appendix...................................................................................................................... 43
Frequency mappings ..................................................................................................43

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E-GSM900 .............................................................................................................. 44
GSM1800................................................................................................................ 46
UI Troubleshooting........................................................................................................ 1
Introduction ..................................................................................................................1
UI module troubleshooting cases .................................................................................1
Display blank............................................................................................................. 1
Image on display not correct..................................................................................... 2
Key or 5-way switch not working............................................................................. 4
Grip-Module Troubleshooting....................................................................................... 1
Introduction ..................................................................................................................1
Backlight ......................................................................................................................2
Current Gauge ..............................................................................................................3
Vibra ............................................................................................................................4
Keyboard ......................................................................................................................5
Hall Sensor ...................................................................................................................6
Camera Troubleshooting Instructions............................................................................ 1
Background, tools and terminology .............................................................................1
Terms......................................................................................................................... 1
Image taking conditions effect to image quality ..........................................................2
Camera construction ....................................................................................................8
Image quality analysis .................................................................................................9
Possible faults in image quality................................................................................. 9
Testing for dust.......................................................................................................... 9
Testing for sharpness............................................................................................... 10
Bit errors.................................................................................................................. 14
Fault finding trees ......................................................................................................15
Hardware failure message....................................................................................... 15
No recognizable viewfinder image ........................................................................ 17
Bad image quality.................................................................................................... 18

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CCS Technical Documentation NHL-2NA
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Baseband Troubleshooting
Introduction
This document is intended to be a guide for localising and repairing electrical faults in
the NHL-2NA device. First there is a brief guide for fault localising. Then fault repairing is
divided into troubleshooting paths.
Before any service operation you must be familiar with the NHL-2NA product and mod-
ule level architecture. You also have to be familiar with the NHL-2NA specified service
tools such as the Phoenix service software, flashing tools and software.
General guidelines for NHL-2NA system troubleshooting
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
General notes about the NHL-2NA product:
• Large colour display
• Keyboard on grip part, rocker, two softkeys and application key under display +
side keys (power key and IHF enabling key)
• Flex cable carries signals between LG4 and LS4 boards. Battery and charger plug
is in grip part, so if the flex is damaged phone cannot be powered on.
• UI-module (display, backlights etc.) is also connected to LG4 module with flex
cable.
• If the component reference is under 100, component is located at the LS4 board.
And if the component reference is over 100, component is located at the LG4
board.
When you get a faulty NHL-2NA device and you start to troubleshoot it, first check the
following items:
• If the device cannot be turned on by any means, see “dead device” troubleshoot-
ing
• Current consumption (missing consumption) gives an idea wether the device is
able to start up.
• Dropping supply voltage or very large current consumption indicates a short cir-
cuit
• Check wether 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 THE RETAILER.” is shown on
the display.
• Check visually display and rocker faults
• Force phone to LOCAL mode and make keyboard test by phoenix

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• Check that board-to-board connector, hotbar and adapter connections are OK,
and connectors make good contacts.
• If liquid damage, stop repairing!
If some module (eg. Camera, display, grip) is not working:
• Try working module
If this not helping
• Check supply voltages for failed module
• Check clock(s) for failed module
=> Go to relevant chapter of this document
Flash phone before disassembling it if fault is not obvious and Phoenix connection is
OK.
Dissasemble phone:
Try to locate failed module, is it LG4, LS4, UI or camera module.
• Check failed module visually:
Mechanical damages?
Solder joints OK?
Continue with specific troubleshooting 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 troubleshooting
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 prob-
lem is not found from any visible contact/component it can be under CSPs where the sig-
nal is connected.
Care must be taken when assembling and disassembling the tranceiver. Failure to do this
may result in unnecessary damage to device.
NOTE! if some ASIC is changed see chapter Bluetooth troubleshooting
Nominal current consumption
NOTE: Service tools need some amount of current to work. (FLA-21: 1-2mA and MJF-9Q:
2-6mA

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The following current consumption values are measured from a complete NHL-2NA.
Vbatt = 3.8 – 4.2V
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 (BT off) 4-8 mA
2w audio call (backlights off) channel37 300-340mA
Viewfinder + nominal backlights 232mA

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Troubleshooting paths
Dead or jammed device

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Partially damaged device
If the device is working, but some functionality is missing try to localize where the prob-
lem is and see relevant part of this manual. If, for example, audio is not working see
chapter Audio Troubleshooting, if charging is not working see chapter Charging Trouble-
shooting, etc.
Most common symptoms reported by customer
In this section is described most common symptoms reported by customers when the
device is brought to service. Some tips where the trouble can be found are also given.
When troubleshooting use these tips and follow the given troubleshooting path.
Most common symtoms for audio problems can be:
“Earpice sound is missing”
”Handsfree sound is missing”
”Headset is not recognized”
”Microphone is not working”
”Volume cannot be adjusted”
” Ringing tones do not work”
”Audio volume too low”
If symptom is something like above see audio troubleshooting.
Most common symptoms for Irda and bluetooth problems can be:
“Irda does not work or it does not make a connection”
”Bluetooth does not work or connection cannot be established”
If symptoms are something like those, start to follow Irda or bluetooth
troubleshooting guidelines gave relevant chapters.
Symptoms related to energy management:
“Phone does not stay on”
”Charging is not working”
”Time is lost during battery change or short main battery removal”
”Charging takes too long”
”Operating time is very short”
These symptoms lead to relevant part of energy managemant trouble-
shooting
If the sensor/sensors are out of order description of symptoms can be like below:
“IHF is not disabled automatically when phone is put near ear”
“IHF cannot be enabled”
“Backlight is always ON or OFF”
“Backlight of display does not go OFF”

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In cases above see Chapter Sensors Troubleshooting or Backlight Trouble-
shooting
Problems in UI-module:
“UI-module keypad is not working”
”Joystick is not working”
”Backlight is dim”
”Baclight not even”
”Backlight is blinking”
”Keypad or display backlight is not working”
”Display related problems”
See UI- module troubleshooting.
Most common RF related symptoms:
“Call cannot be made”
”Phone does not find signal”
”Call is often dropped”
See RF troubleshooting
Problems with camera can cause symptoms as:
“Bad image quality”
”Picture cannot be taken”
See camera module troubleshooting
Problems in LS4 can cause symptoms below:
”Backlight of grip is dim”
”Baclight of grip not even”
”Backlight of grip is blinking”
”Grip keypad is not working”
”Vibra is not working or is noisy etc.”
See grip- module troubleshooting.
Contact the retailer” on display
“Contact the retailer.” on display (Self-tests by Phoenix)
Display information: “Contact the retailer”

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Issue 1 07/02 ¤Nokia Corporation Page 7
This fault means that software is able to run and thus the watchdog of UEM can be
served.
Selftest functions are executed when the phone is powered on and if one or more selft-
est functions fail, the message “Contact the retailer” is shown on the display.
MCU selftest cases can be split into two categories: The ones that are executed during
power up and the ones that are executed only with a PC connected. These tests and the
items included are as follows:
Figure 1: BB selftest-tool
If a selftest fails, see relevant chapter in this troubleshooting manual.

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LG4 Baseband HW subarea troubleshooting
Flashing troubleshooting
NHL-2NA has three memory components installed on the main pwb. The best indication
of which one is causing problems can be obtained by flashing the device. It has to be
kept in mind that all three flashes are interfaced with UPP WD2 asic that might itself
have some problems. The necessary steps are described below. Phoenix error messages
during flashing greatly help on defining what is wrong. To be able to flash the device,
most device BB area components must function properly.
Flashing
faults
Measure
I_FBUS_TX(J121)
line during flash
programming is it
1.8V?
Change
UEM
No
Yes
Check BSI line
Battery connector, flex,
C239, Z383, R384
Yes Yes
"The phone
does not set
Flashbus TXD
line high after
startup"
"The phone
does not set the
flashbus TXD
line low after the
startup"
No
Measure BSI
pulse during
flash
programming
Is it ok?
No
Change UPP
WD2
No Memory
faults page
2
Check connections
Check BB voltages
Check clocks
Change UEM
Yes
"Secondary
receive fail" or
"Algorithm send
failed"
message? Change UPP_WD2
Yes
No

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Memory
faults page
2
Change Flash Chip
according to Phoenix
messages
If both chips report wrong
ID's -> change UPP_WD2
Yes
Change SDRAM
Yes
Prommer
message about
sdram failure?
Wrong
manufacturer ID
anddeviceID
No
No
Retest
"Flash informs
about a failure"
during flashing
No
Check flash0 bypass caps, check
Vpp connection to flasher, Check
Vpp resistor(4.7k)
Ok->Change flash0
Yes
Yes
Activity in sdram
clk J108 pad?
No
Change UPP_WD2
Yes
Voltages
VmemA and
VioA ok?
No
EM
troubles
No
Yes and sdram
allready changed
No
"Data block
handling
timeout"
message?
Bluetooth module is unable to start
flashing ->
Check V590,R591,R593-596,C594
and C595 -> still not ok
-> change BT module
Yes Flashing with
option "phone
only" succesful?
Yes
No

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Energy management troubleshooting
Device does not stay on
If the device is switched off without any visible reason, there may be problems in the fol-
lowing areas:
• UEM watchdog problem (WD is not updated by SW)
• BSI line problem (BSI line is floating => contact failure)
• Battery line problem
• Soldering problem
The most likely reason is UEM WD (watchdog), which turns the device off after about 32
seconds if SW is jammed.
This may be caused by a SW problem, UPP_WD2 problem (Not server by SW), UEM, AEM
or memory malfunctions.
The following tests are recommended:
• General power checking
•Clocks
•Memorytesting
• Serial Interface
If there is something wrong in BSI line, the device seems to be dead after the power key
is pressed. However the regulators of the device are on a few seconds before the power-
down.
This mode can easily be detected from the current consumption of the device. After a
few seconds the current consumption drops almost to 0 mA.
In this case check components listed below or soldering:
Battery connector X002
Grip connector X001 (especially pin number 27)
Hotbar soldering X380 (especially pin number 5)
EMI-filter Z383 (especially pins number A4 and E4)
UEM D190 (pin number C2)
If phone boots to TEST or LOCAL mode with normal battery, BSI or Btemp or both lines
are short circuited to ground. Check varistors, EMI-filter and filtering capacitors, which
are located to BSI and Btemp lines.
General power checking
Use service tool FLA-21. Battery voltage should be atleast 3.6V. After phone disassembly,
use module jig MJS-9Q.

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.

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SMPS of AEM troubleshooting

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Power key troubleshooting

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Clocks troubleshooting
The main clock signal for the baseband is generated from the voltage and temperature
controlled crystal oscillator VCTCXO (G591). This 26 MHz triangle wave clock signal is
supplied to OSC_IN pin of HAGAR. Inside HAGAR the clock frequency is divided to 13
MHz and then fed to RFCLK pin of UPP_WD2 and Bluetooth.
In SLEEP mode the VCTCXO is off. UEM generates low frequency clock signal (32.768
kHz) that is fed to UPP_WD2, Bluetooth and AEM.
When the flashing of the device does not succeed, but powering is OK, follow these
instructions.
Note: The absence of clocks may indicate that the device (put phone to LOCAL mode
when the sleep is not allowed or press buttons so that phone is not in sleep mode) is in
sleep mode. Make sure that the device is not in sleep during RF clock measuring.
IMPORTANT: Clock signals have to be measured with 1M Ω (or greater) probes!
UPP_WD2 UEM
AEM
RF
SIM
FLASHes
RF-ASIC
SDRAM
C
BusCl
S
leepClk
LPRF
RFClk
13 MHz
RFBusCl
Flash
Clk
S
DRAM
C
lk
VCXO
S
IMCl
(Hagar)
D
BusCl
CAMERA