Nokia 6265 Guide

Nokia Customer Care
6265/6265i/6268 (RM-66)
Mobile Terminals
Issue 1 11/2005 Company Confidential ©2005 Nokia Corporation
Baseband Description and
Troubleshooting

6265/6265i/6268 (RM-66)
Baseband Description and Troubleshooting
Page 2 ©2005 Nokia Corporation Company Confidential Issue 1 11/2005
Contents Page
Introduction ..................................................................................................................................................... 5
Power Up Sequence ....................................................................................................................................6
Baseband/RF Regulators ............................................................................................................................8
Baseband Regulators ............................................................................................................................... 8
Baseband/RF Regulators......................................................................................................................... 8
Flash Programming ..................................................................................................................................... 10
Flashing Tool ...............................................................................................................................................10
Flashing Troubleshooting ........................................................................................................................10
Flashing Phoenix Interface .....................................................................................................................12
Audio............................................................................................................................................................... 13
How the Audio Works ..............................................................................................................................13
Audio Troubleshooting .............................................................................................................................14
Audio Phoenix Interface ..........................................................................................................................15
Camera............................................................................................................................................................ 16
How the Camera works ............................................................................................................................16
Camera Troubleshooting ..........................................................................................................................16
Camera Phoenix Interface .......................................................................................................................18
FM Radio ........................................................................................................................................................ 19
How the FM Radio Works .......................................................................................................................19
FM Radio Test .............................................................................................................................................19
FM Radio Troubleshooting ......................................................................................................................19
FM Radio Phoenix Interface ...................................................................................................................21
USB (Universal Serial Bus)......................................................................................................................... 22
How the USB Interface Works ...............................................................................................................22
USB Troubleshooting ................................................................................................................................23
Infrared........................................................................................................................................................... 25
How Infrared Works ..................................................................................................................................25
Infrared Troubleshooting .........................................................................................................................25
Infrared Phoenix Interface ......................................................................................................................26
Display ............................................................................................................................................................ 27
How the Display Works ............................................................................................................................27
Display Troubleshooting ..........................................................................................................................27
Display Backlight Troubleshooting .......................................................................................................28
Display Phoenix Interface .......................................................................................................................30
Keypad Backlight ......................................................................................................................................... 31
How the Keypad Backlight Works ........................................................................................................31
Keypad Backlight Troubleshooting .......................................................................................................31
Keypad Backlight Display Phoenix Interface .....................................................................................32
Slide Detect Circuit ..................................................................................................................................... 33
How the Slide Detect Circuit Works ....................................................................................................33
Slide Detect Circuit Troubleshooting ...................................................................................................33
GPS................................................................................................................................................................... 35
How the GPS Works ..................................................................................................................................35
What does the GPS BB do? .....................................................................................................................36
GPS Troubleshooting ................................................................................................................................36
GPS Phoenix Interface ..............................................................................................................................38
UIM Card........................................................................................................................................................ 39

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How UIM Card Works ...............................................................................................................................39
UIM Card Troubleshooting ......................................................................................................................39
UIM Card Phoenix Interface ...................................................................................................................42
Bluetooth ....................................................................................................................................................... 43
How the Bluetooth Works ......................................................................................................................43
Bluetooth Troubleshooting .....................................................................................................................44
Bluetooth Phoenix Interface ..................................................................................................................45
Mini-SD .......................................................................................................................................................... 46
Mini-SD Troubleshooting ........................................................................................................................46
System Connector........................................................................................................................................ 47
Accessory Detection.................................................................................................................................... 48
Battery Interface Circuit............................................................................................................................ 49
Charging......................................................................................................................................................... 50
Common Problems ...................................................................................................................................... 51
No Communication During Flash ..........................................................................................................51
No Communication During Alignment ................................................................................................51
Failed Self Test/Calibrate .........................................................................................................................51
Mobile Terminal Not Powering Up .......................................................................................................51
Shut Down After 32 Seconds .................................................................................................................51
No Audio ......................................................................................................................................................52
Key Pads Malfunction ..............................................................................................................................52
No LCD Display ...........................................................................................................................................52
Phoenix Tools................................................................................................................................................ 53
Reference ....................................................................................................................................................... 59
Signal references .......................................................................................................................................59
Main Display Test Points .......................................................................................................................... 60

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Baseband Description and Troubleshooting Nokia Customer Care
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Nokia Customer Care Baseband Description and Troubleshooting
6265/6265i/6268 (RM-66)
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Introduction
The 6265/6265i/6268 baseband module is a tri-mode, Code Division Multiple Access
(CDMA), dual-band engine and is based on the DCT4.5 standard. The baseband engine
includes three major Application Specific Integrated Circuits (ASICs):
• D2200 — Universal Energy Management Enhanced Integrated Circuit (UEMEK IC),
which includes the audio circuits, charge control, and voltage regulators
• D2800 — Main mobile terminal processor, which includes system logic for CDMA,
two Digital Signal Processors (DSPs), the Main Control Unit (MCU), and the
memory
• D3000 - Mobile terminal internal memory combo flash (NOR/NAND/SDRAM)
The BL-6C Li-ion battery is used as the main power source.

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Power Up Sequence
When the mobile terminal is dead or jammed always check the Power Up Sequence of
the baseband area. Verify all regulator and reset signals are correct to ensure proper
power up of the UEMEK and D2800 (see Figure 1)
Figure 1: Power-on sequence and timing
Reference signal
PwrOnX
Charger Detection
RTC
UEMRSTX
VCORE
VFlash1
VIO
VANA
VR3
19.2MHz Clk
PURX
t1 t2 t4t3
Sleep Clock
t1 = 20ms
t2 = 200ms
t3 = 500us
t4 = 20ms
Reset mode is entered and
the watchdog starts
End of settling time (only if Vbat > Vcoff+_);
VFLASH1 regulator enabled
VR3, VANA, VIO, and VCORE enabled;
PURX held LOW
D2800 processor, MCU, and DSP are
reset; VCTCXO regulator forced on

Nokia Customer Care Baseband Description and Troubleshooting
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Figure 2: Measured power-on sequence and timing

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Baseband Description and Troubleshooting
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Baseband/RF Regulators
Baseband Regulators
The baseband circuitry for the 6265/6265i/6268 is powered from five different UEMEK
regulators: VANA, VIO, VFLASH1, VAUX, and VCORE DC/DC. See Figure 3 for regulator
levels.
Baseband/RF Regulators
The following are voltage regulators from the UEMEK to the RF circuit.A charge pump
used by VR1A is constructed around UEMEK. The charge pump provides a 4.75V
regulated output to the RF block. See Figure 3 for regulator levels.
Table 1: Baseband regulators
Regulator
Maximum
current
(mA)
Vout
(V) Notes
VCORE DC/DC 300 1.35 Output voltage selectable 1.03V - 1.57V
2 modes: Normal 1.35V, Sleep 1.03V
VIO 150 1.8 Enabled always, except during power-off mode
VFLASH 1 70 2.78 Enabled always, except during power-off mode
VAUX 2 70 2.78 Enabled when smart accessories are connected
VANA 80 2.78 Enabled only when the system is awake (Off
during sleep and power-off modes)
VSIM 25 3.0 Enabled when UIM card is detected
Table 2: Baseband/RF regulators
Regulator
Maximum
current
(mA)
Vout
(V) Notes
VR1A 10 4.75 Enabled when receiver is on
VR1B 10 4.75 Enabled when transmitter is on
VR2 100 2.78 Enabled when transmitter is on
VR3 20 2.78 Enabled when SleepX is high
VR4 50 2.78 Enabled when receiver is on
VR5 50 2.78 Enabled when receiver is on
VR6 50 2.78 Enabled when transmitter is on
VR7 45 2.78 Enabled when receiver is on
VREF RF1 --- 1.35 Provides voltage reference prior to EM calibration

Nokia Customer Care Baseband Description and Troubleshooting
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Figure 3: Voltage regulators-D2200
VR2
VR7VR6
VR5
VR4
VR3
VCORE
VFLASH 1VANA
VIO

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Baseband Description and Troubleshooting
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Flash Programming
Flashing Tool
Flash programming is done through the VPP, FBUSTX, FBUSRX, MBUS, and BSI signals
BSI = Used to indicate to MCU that the prommer is connected and mobile terminal is in
flashing mode
MBUS = Used as clock signal for synchronizing the serial communication between the
prommer and MCU
FBUSRX = Data to D2800
FBUSTX = Data to prommer
VPP = 0v/ 1.8v/ 12v (read only/normal op. or slow programming/fast programming)
Figure 4 shows the DA-57 docking station adapter and Module Jig MJ-73.
Figure 4: DA-57 docking station adapter and MJ-73 module jig
Flashing Troubleshooting
When troubleshooting flashing problems, first make sure the signals from the FPS-8 to
the D2800 processor are functioning properly before replacing any component. Once
signals between production test points and the D2200 and the D2800 processor have
been checked, verify that the interface between D2800 processor and flash is correct.
While all the signals between D2800 processor and flash are not visible, the available
signals will help identify the components that may need to be replaced.

Nokia Customer Care Baseband Description and Troubleshooting
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.
Figure 5: Flashing diagram
When troubleshooting the flashing to diagnose and determine faulty components, check
the signals in the following sequence:
• Make sure the signals from the tester are making contact with the production
flash pads.
• Use Phoenix to either program or erase a mobile terminal that is not working.
This allows you to monitor the signals form the FPS-8 to the D2800 processor.
• When flashing or erasing the mobile terminal, monitor the MBUSRX and FBUSRX
signals from the UEMEK to the D2800 processor for a signal at these points. If
either signal does not appear, check the signal at the production test points. If
the signal is ok, check the UEMEK. Re-flow or replace the UEMEK.
• Next make sure that the D2800 processor sends information back to the FPS-8
through the FBUSTX signal. If there is no activity at this point re-flow or replace
the processor.
• If all points are ok, make sure the FBUSTX signal goes through the UEMEK by
measuring the signal at the FBUSTXO at production test points. If there is no
signal present, reflow or replace the UEMEK.
• If all signals form the production test points to the UEMEK to the D2800
processor are functioning, it is safe to assume that the UEMEK and D2800
processor are ok.
Continue troubleshooting the D2800 processor as it interfaces with the flash. Verify the
available signal interface between the processor and flash as follows:
• Erase or program the mobile terminal to monitor the D2800 processor and flash
interface as verified earlier using Phoenix External.
• When programming or erasing the mobile terminal, monitor the FLSCSX, FLSCLK,
EXTRDX, and EXTWRX flash signals. If any of these signals has no activity, re-flow
or replace the D2800 processor.
• If all signals are ok, re-flow or replace the flash.
FBUS TxO
MBUS
FBUS RxO
Production
Test Points
UEMEK D2800 Flash
Memory
MBUS Tx
MBUS Rx
FBUS Tx
FBUS Rx
FLSCSX
EXTRDX
EXTWRD
FLSCLK
D2200 D2800 D3001
Signal voltage
levels are 2.78V Signal voltage
levels are 1.8V Signal voltage
levels are 1.8V
FBUS TxO
MBUS
FBUS RxO
Production
Test Points
UEMEK D2800 Flash
Memory
MBUS Tx
MBUS Rx
FBUS Tx
FBUS Rx
FLSCSX
EXTRDX
EXTWRD
FLSCLK
D2200 D2800 D3001
Signal voltage
levels are 2.78V Signal voltage
levels are 1.8V Signal voltage
levels are 1.8V
VPP

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If additional troubleshooting is still required to determine why the mobile terminal
cannot be flashed, verify all the baseband voltages. In particular, check the VIO (1.8V at
R3002) since it is one of the regulators that powers the flash chip.
Flashing Phoenix Interface
Run EZ Flash in Phoenix to flash the mobile terminal.
Figure 6: EZ Flash in Phoenix
.
Figure 7: EZ Flash in Phoenix

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Audio
How the Audio Works
The baseband supports three microphone inputs and two earpiece outputs. The
microphone inputs are MIC1, MIC2, and MIC3:
• MIC1 input is used for the mobile terminal's internal microphone
• MIC2 input is used for headsets (Pop-port™)
• MIC3 input is used for the Universal Headset
Every microphone input can have either a differential or single-ended AC connection to
the UEMEK circuit. In the Nokia 6265/6265i/6268, the internal microphone (MIC1) and
external microphone (MIC2) for Pop-port™ accessory detection are both differential.
However, the Universal Headset interface is single-ended. The microphone signals from
different sources are connected to separate inputs at the UEMEK. Inputs for the
microphone signals are differential types. Also, MICB1 is used for MIC1 and Vflash1 is
used for MIC2 and MIC3 (Universal Headset).
Figure 8: Audio components
UHJ
Charging jackMIC
Earpiece
Volume keys

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Audio Troubleshooting
When troubleshooting the audio, make these common checks (see Figure 8):
• Perform a visual inspection of all the ASIPs and the UEMEK.
• Inject a 1KHz signal into MiC1 and trace it to the earpiece. Only when using IHF
signal will be amplified by a factor of 8x.
Figure 9: UEMEK Side of Audio diagram
• Make sure the audio amplifier and solder are ok.
• Make sure the IHF speaker contacts are ok.
• Make sure output is amplified by 8x. If not, check that the gain resistors network
is correct.
Figure 10: Figure 9: IHF troubleshooting
Audio ASIPs
DC Block Caps
Audio ASIPs FM Radio lines
DC Block caps IHF
Audio amplifier

Nokia Customer Care Baseband Description and Troubleshooting
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Audio Phoenix Interface
Run Audio Test in Phoenix to check the audio functionality.
Figure 11: Audio test in Phoenix
MiC1- Use the first option to route the audio from
the internal microphone to the headset speaker.
MiC2- Use the second option to route the audio
signal from the headset microphone to internal
earpiece.
MiC3 - Use the first and second options to test MIC3.
Open channel and insert the universal headset. The
UEMEK automatically re-routes the audio signal to
the UHJ.
IHF - Use the fifth option to route audio signal to IHF
speaker out.

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Camera
How the Camera works
When you select the view finder to take a picture, the D2800 activates the camera by
turning on GENIO(27) PDN and GENIO(24) 9.6MHz. Once the camera is initialized, D2800
sends control commands through the I2C (GENIO (25&26) interface. The camera takes a
picture and sends raw data back to a hardware accelerator (HWA) device. The HWA
delivers the processed image data to D2800. The D2800 takes the processed image data
from the HWA, and the image is stored in the flash memory or mini SD, per user
selection.
Figure 12: Camera flash
Camera Troubleshooting
When troubleshooting the camera, make these common checks (see Figure 13):
• Check power supply Enable from Tiku_GPIO (47)
• Check power supply V2.8, VDIG and V1.2
• Check that Enable GenIO(27) is high
• Check the Camera Clk GenIO(24)(9.6 MHz)
• Check the Control line I2C on GenIO 25 and 26
• Check CCP data/clk lines from the sensor to HWA, then to D2800
• Inspect the camera socket and replace camera
• Check D2800 for solder problems and replace it if necessary
Camera flash

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Issue 1 11/2005 ©2005 Nokia Corporation Company Confidential Page 17
Figure 13: Camera components and test points
VDIG 1.8V chip
GPIO(26)
GPIO(25)
Tiku_GPIO(47)
(1.8V)
V1.2V chip
Data/clk to TIKU
CCP1/CLKN(3)
CCP1/CLKP(2)
CCP1/DATN(1)
CCP1/DATP(0)
V2.8V chip
VDIG 1.8V chip
V1.2V chip
V2.8V chip
GPIO(24) (9.6 MHz)
Raw image data from
Sensor to HWA
CCP2/CLKN
CCP2/CLKP
CCP2/DATN
CCP2/DATP
GPIO(27)

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Camera Phoenix Interface
Run the Camera Control test in Phoenix to check the camera functionality.
Figure 14: Camera control in Phoenix
Use Viewfinder On option to view image
in the PC Window

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FM Radio
How the FM Radio Works
The D2800 turns on the FM radio and sets the frequency using the CBUS serial interface
as the communication channel. A high frequency FM radio signal comes in through
RFIN1 Pin to the FM radio chip and gets demodulated into a low frequency signal and is
sent to the UEMEK for amplification. The amplified signal then gets routed back either to
the universal headset or to the system connector for the stereo headset.
Figure 15: FM Radio (N356), Audio (N150), antenna, and digital interface connections
FM Radio Test
To hear the FM radio, first connect the headset to the Pop-port™ or UHJ ports because
the headset is used as an FM radio antenna. Connect the headset to UHJ port to control
the FM radio using Phoenix. If you connect a headset (such as HDS-3) to a Pop-port™
connector, then you cannot control the mobile terminal because the connection port
(Pop-port™) is already occupied. In this case you have to have jumper wires on the
production test points (Fbus Tx/RX,GND).
FM Radio Troubleshooting
When troubleshooting the FM radio, make these common checks (see Figure 16):
• Check Power Supply VIO and VANA
• Check SleepCLK
• Check FMANT
FM Radio TIKUEDGE
HSEARN
HSEARP
HSEARRN
HSEARRP
68nH
40pF
100P
UEMEK
audio
Amplifier
Antenna signal
Sleep CLK
CBUS_DA
CBUS_CLK
CBUS_EN
Xtal1
Data
W/R
Clock
Rfin1
Audio R
Audio L
FMClk
FMCtrlDa
FMCtrlClk
FMWrEn
POP PORT™
System Connector FM Radio TIKUEDGE
HSEARN
HSEARP
HSEARRN
HSEARRP
68nH
40pF
100P
UEMEK
audio
Amplifier
Antenna signal
Sleep CLK
CBUS_DA
CBUS_CLK
CBUS_EN
Xtal1
Data
W/R
Clock
Rfin1
Audio R
Audio L
FMClk
FMCtrlDa
FMCtrlClk
FMWrEn
POP PORT™
System Connector

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• Check for activity on CBUS
• Check the output of the FM radio on VAFR and VAFL. It should be an audio signal
with a 800mv DC-offset.
• If the audio signal is not correct (with 800mv DC-offset), then check the FM
radio chip for shorts, voids, and misalignments
• If the audio signal is correct (with 800mv DC-offset), then check the UEMEK for
shorts, voids, and misalignments
• If the UEMEK and FM Radio Chip is correct, check the system connector
Figure 16: FM Radio chip and antenna
FM Radio Chip (always
the check solder)
VAFL
VAFR
VANA (2.8V)
GND
FMANT
VIO (1.8)