Nokia 6600 Service Manual 06a nhl10 bb trouble

Customer Care Solutions

Technical Documentation

6(a) - Baseband Troubleshooting

and Manual Tuning Guide

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Table of Contents

Page No

Introduction to NHL-10 troubleshooting .......................................................................................................4

Dead or jammed phone ................................................................................................................................5

BB Selftest tools ............................................................................................................................................5

Flash programming fault .............................................................................................................................7

General Power checking .............................................................................................................................. 8

Baseband serial interface troubleshooting ............................................................................................9

CBUS ..........................................................................................................................................................9

FBUS .........................................................................................................................................................10

MBUS .......................................................................................................................................................10

Energy management calibration .............................................................................................................14

Troubleshooting tips ...................................................................................................................................14

ADC-offset over limits ........................................................................................................................14

BSI Gain over limits .............................................................................................................................14

Vbatt offset and Gain .........................................................................................................................14

Vchar over limits ..................................................................................................................................14

Ichar over limits ....................................................................................................................................14

ADC-reading .................................................................................................................................................14

Backup battery .............................................................................................................................................15

IrDA Interface Fault ....................................................................................................................................17

SIM Card Fault ..............................................................................................................................................18

“Insert SIM Card” in device display although card is inserted .......................................................21

Keypad Interface Fault ...............................................................................................................................22

Display Fault .................................................................................................................................................23

Illumination Fault (Display/Keyboard backlight) ................................................................................24

MMC Interface Fault ..................................................................................................................................25

Audio troubleshooting ...............................................................................................................................26

Microphone ............................................................................................................................................26

Earpiece ..................................................................................................................................................28

IHF ............................................................................................................................................................30

Accessory detection troubleshooting .............................................................................................32

Camera Module Troubleshooting ...................................................................................................................33

Terms ...............................................................................................................................................................33

Image taking condition effect on image quality ................................................................................33

Image quality analysis .......................................................................................................................................38

Possible faults in image quality ..............................................................................................................38

Testing for dust ............................................................................................................................................38

Testing for sharpness ..................................................................................................................................39

Bit errors ........................................................................................................................................................40

Hardware failure message ........................................................................................................................41

No recognizable viewfinder image .........................................................................................................42

Bad image quality .......................................................................................................................................43

Baseband Tuning operation .............................................................................................................................44

Energy management calibration .............................................................................................................44

Connections ...........................................................................................................................................44

Phoenix Setup .......................................................................................................................................44

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Calibration procedure with JBV-1................................................................................................... 45

Zocus (IBAT) calibration with MJ-2 module jig.................................................................................. 46

Connections ...........................................................................................................................................46

Phoenix Setup .......................................................................................................................................46

Zocus (IBAT) calibration procedure with MJ-2 module jig ..............................................................47

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Introduction to NHL-10 troubleshooting

This document is intended to be a guide for localizing and repairin g electrical faults in the NHL10 device. The fault repairing is divided into troubleshooting paths.

The following diagrams describe baseband troubleshooting.

Figure 1: Main Troubleshooting Diagram

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Dead or jammed phone

Figure 2: Phone is jammed or dead

BB Selftest tools

“Selftest failed. Contact service.” on display This fault means that the 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 selftest func-

tions fail, the message “Selftest failed. Contact service.” 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:

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Figure 3: BB self test items

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Flash programming fault

Figure 4: Flashing troubleshooting

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General Power checking

Figure 5: General Power check

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Baseband serial interface troubleshooting

CBUS

CBUS is a three wire serial interface between the main baseband components. The bus consists of data, clock and bus_enable signals. In NHL-10 the bus is connected from UPP_WD2 to UEM and the BT module. UPP_WD2 takes care of controlling the traffic on the bus.

If the interface is faulty from the UPP WD2's end the phone will not boot properly as powering configurations do not work. Traffic on the bus can be monitored from three pins on the BT module.

Pins are shown below.

Figure 6: CBUS test points

CBUS traffic is shown in the figure below (Read command to Zocus, LM3819, N380). CbusClk is connected to Ch1, Cbus Da to Ch2 and CbusEnx to Ch3.

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Figure 7: CBUS waveform

If you are able to get the phone to boot up and can reach Phoe nix BB self tests it is possible to test the functionality of each component attached to Cbus. Use:

• ST_UEM_CBUS_IF_TEST to test UEM Cbus interface

• ST_LPRF_IF_TEST to test Bluetooth Cbus interface

• ST_ZOCUS_CBUS_IF_TEST to test Zocus Cbus interface

If an error is found testing any of the above components you should replace or re-solder the failing component.

FBUS

FBUS is a two wire RX and TX interface between UPP and flash/test interface. The bus goes through UEM, which adjusts the voltage levels to suit UPP_WD2. The interface voltage level on the phone flash/test pad pattern is 2.78V and on the UPP WD2 end it is 1.8V.

The functionality of this interface should not affect the device boot into NORMAL, LOCAL nor TEST modes. Phoenix tests can be performed through the MBUS interface in case of a failure in FBUS interface. Flashing is not possible if there is a problem in FBUS interface.

MBUS

MBUS is a two-wire RX and TX interface between UPP and UEM. From UEM the interface continues to flash/test interface as a one-wire interface. UEM adjusts the voltage levels.

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The interface voltage level on the phone flash/test pad pattern is 2.78V and on the UPP WD2 end it is 1.8V. The MBUS traffic between UPP WD2 and UEM can be tested with PHOENIX (ST_MBUS_RX_TX_LOOP_TEST). Flashing is not possible if there is a problem in MBUS.

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Charger Interface troubleshooting

Figure 8: Not charging on display

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Figure 9: Charger nothing happened

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Energy management calibration

During energy management calibration, the A/D converter, BSI, Btemp, Battery voltage, Charger voltage and Charger current are calibrated. For detailed information and instructions see EM-calibration instructions in the service manual.

Troubleshooting tips

ADC-offset over limits

Inspect the BSI line, connectors (hotbar and board to board connector) and components in it (Capacitor C226, ASIP R385, Pull-up resistor R220). If these are OK, change UEM.

BSI Gain over limits

Inspect the BSI line, connectors (hotbar and board to board connector) and components in it (Capacitor C226, ASIP R385, Pull-up resistor R220). If these are OK, change UEM.

Vbatt offset and Gain

Inspect Vbatt lines and components in it.

Vchar over limits

Inspect components that are connected Vchar line: Filtering capacitors C384, C385, TVS V381, L380 and Fuse F380. If those are OK, change UEM.

Ichar over limits

Inspect components that are connected Vchar line: Filtering capacitors C384, C385, TVS V381, L380 and Fuse F380. If those are OK, first change the current sense resistor (R190), if calibration is not still successful change UEM.

Calibration can be checked using ADC-reading. Known voltages, currents and resistances are fed and read by ADC-reading, read values and known values can be compared.

ADC-reading

Divided and scaled battery voltage, Charger voltage, Charger current and BSI values can be read by this tool. Read values a few times before you can be sure that results are accurate.

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