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Nokia RH-44 Series, Troubleshooting - Bb

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RH-44

Troubleshooting — BB

CCS Technical Documentation

Page 24

 

Nokia Corporation          Confidential

Issue 1 04/2003

Top troubleshooting map

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Phone dead

Flash faults

Phone is jammed

Charger

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NO

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YES

Summary of Contents for RH-44 Series

Page 1: ...CCS Technical Documentation RH 44 Series Transceivers Issue 1 04 2003 Confidential Nokia Corporation Troubleshooting BB ...

Page 2: ...RH 44 Troubleshooting BB CCS Technical Documentation Page 2 Nokia Corporation Confidential Issue 1 04 2003 ...

Page 3: ...tion 14 Clock Distribution 15 RFClk 19 2 MHz Analog 15 RFConvClk 19 2 MHz digital 16 CBUSClk Interface 17 DBUSClk Interface 17 SLEEPClk Digital 18 SLEEPClk Analog 18 Charging operation 19 Battery 19 Charging circuitry 20 Charger Detection 20 Charge Control 21 Audio 21 Display and Keyboard 22 Accessory 22 Test Points 23 Troubleshooting Flowcharts 24 Top troubleshooting map 26 Phone is totally dead ...

Page 4: ...RH 44 Troubleshooting BB CCS Technical Documentation Page 4 Nokia Corporation Confidential Issue 1 04 2003 ...

Page 5: ... are in standby mode and the normal VCTCXO clock is switched off The phone is awakened by a timer running from this 32 kHz clock supply The period of the sleep wake up cycle slotted cycle is 1 28N seconds where N 0 1 2 depending on the slot cycle index RH 44 supports standard Nokia two wire and three wire chargers ACP x and LCH 9 However the three wire chargers are treated as two wire chargers The...

Page 6: ...nnected to the baseband using test pads for gal vanic connection The test pads are allocated in such a way that they can be accessed when the phone is assembled The flash programming interface uses the VPP FBUSTX FBUSRX MBUS and BSI connections for the connection to the baseband The connection is through the UEM which means that the logic levels correspond to 2 7V Power is supplied using the batte...

Page 7: ...r the flash prommer generates a falling edge on the BSI line This loads the shift register content in the UEM into a compare register If the 8 bits in the compare registers match with the default value preset in the UEM The flash prommer pulls the MBUS signal to UEM low in order to indicate to the MCU that the flash prom mer is connected The UEM reset state machine performs a reset to the system P...

Page 8: ...been noticed by using FBUSTX signal After this it reports UPP type ID and is ready to receive secondary boot code to its internal SRAM See the following figure Figure 3 Flashing 2 Ch1 PURX Ch2 MBUS toggled three times for MCU initialization Ch3 FBUS_TX low MCU indicates that prommer has been noticed Ch4 FBUS_RX CH1 BSI CH2 MBUS CH3 FBUSTX CH4 FBUSRX Measure points Production test pattern J396 FLAS...

Page 9: ... battery voltage is greater than Vcoff a 200 ms delay is started to allow references and so on to settle After this delay elapses the VFLASH1 regulator is enabled Then 500 us later VR3 VANA VIO and VCORE are enabled Finally the Power Up Reset PURX line is held low for 20 ms This reset PURX is sent to UPP and resets are generated for the MCU and the DSP During this reset phase the UEM forces the VC...

Page 10: ...nowledged at the rising edge of the PURX signal in order to always give the same watchdog response time to the MCU The following timing diagram represents UEM start up sequence from reset to power on mode Figure 5 Power on sequence and timing Reference signal PwrOnX Charger Detection RTC UEMRSTX VFlash1 VIO VCORE VANA VR3 19 2MHz Clk PURX t1 t2 t4 t3 32kHz XTAL t1 20ms t2 200ms t3 500us t4 20ms ...

Page 11: ...ts this as a valid power on state and continues with the SW initialization of the baseband If the power on key does not indicate a valid power on situation the MCU powers off the baseband Power up when charger is connected In order to be able to detect and start charging in a case where the main battery is fully discharged empty and hence UEM has no supply NO_SUPPLY or BACKUP mode of UEM charging ...

Page 12: ...eration modes The power off mode the power VBAT is supplied to UEM MIDI PA VIBRA LED PA and PA drivers Tomcat and Hornet In the sleep mode both processors MCU and DSP are in stand by mode Sleep mode is controlled by both processors When SLEEPX signal is detected low by the UEM the phone enters SLEEP mode VIO and VFLASH1 regulators are put into low quiescent cur rent mode VCORE dc dc enters PFM or ...

Page 13: ...ing control circuitry CHACON inside the UEM controls the charging current delivered from the charger to the battery and phone The battery voltage rise is limited by turning the UEM switch off when the battery voltage has reached 4 2 V Charging current is monitored by measuring the voltage drop across a 220 mOhm resistor Power Distribution In normal operation the baseband is powered from the phone ...

Page 14: ...0 1 5 Output voltage selecta ble 1 0V 1 3V 1 5V 1 8V Power up default 1 5V VIO 150 1 8 Enabled always except during power off mode VFLASH1 70 2 78 Enabled always except during power off mode VFLASH2 40 2 78 Enabled only when active cover is detected VANA 80 2 78 Enabled only when the system is awake off during Sleep and Power off modes VSIM 25 3 0 Enabled only when SIM card is used Table 2 RF regu...

Page 15: ... MHz digital The UPP distributes the 19 2MHz internal clock to the DSP and MCU where SW multi plies this clock by seven for the DSP and by two for the MCU See the following figure Figure 8 RF CovClk waveform CBUSClk Interface A 1 2 MHz clock signal is use for CBUS which is used by the MCU to transfer data between UEM and UPP See the following figure for Cbus data transfer ...

Page 16: ...S which is used by the DSP to transfer data between UEM and UPP See following figure Figure 10 Dbus data transfer The system clock is stopped during sleep mode by disabling the VCTCXO power supply VR3 from the UEM regulator output by turning off the controlled output signal SleepX from UPP SLEEPClk Digital The UEM provides a 32kHz sleep clock for internal use and to UPP where it is used for ...

Page 17: ...m UEM SLEEPClk Analog When the system enters sleep mode or power off mode the external 32KHz crystal pro vides a reference to the UEM RTC circuit to turn on the phone during power off or sleep mode See next figure Figure 12 32kHz analog waveform at 32KHz crystal input Charging operation Battery A 1000 mAh Lithium Ion cell battery is used Reading a resistor inside the battery pack ...

Page 18: ... be read by A D inputs in the phone Figure 13 BLC 2 battery pack pin order Figure 14 Interconnection diagram inside the battery pack Charging circuitry The UEM ASIC controls charging depending on the charger being used and the battery size External components are needed for EMC reverse polarity and transient protection of the input to the baseband module The charger connection is through the syste...

Page 19: ... controlled by EM SW The charger recognition is initiated when the EM SW receives a charger connected interrupt The algorithm basically consists of the following three steps 1 Check that the charger output voltage and current is within safety limits 2 Identify the charger as a two wire or three wire charger 3 Check that the charger is within the charger window voltage and current If the charger is...

Page 20: ...s and two earpiece outputs The micro phone inputs are MIC1 MIC 2 and MIC3 MIC1 input is used for the phone s internal microphone MIC2 input is used for headsets HDB 4 BHF 1 and CARK 142 and Loopset LPS 4 MIC3 input is used for third party accessories 2 5mm Jack Every microphone input can have either a differential or single ended AC connection to UEM circuit The internal microphone MIC1 and MIC2 a...

Page 21: ...4 and universal headset The UHJ is detected by the interrupt generated on GenIO 12 The basic headset is detected via ACI detection algorithm However the ACI pin is always grounded It is the end user s responsibility to set the phone for TTY TDD since there are too many different TTY TDD devices to be detected Active cover is detected by the A D level on SLOWAD 4 There is 100k pull up inside the an...

Page 22: ...RH 44 Troubleshooting BB CCS Technical Documentation Page 22 Nokia Corporation Confidential Issue 1 04 2003 Test Points Figure 18 RH 44 Test Points Top Figure 19 RH 44 Test Points bottom ...

Page 23: ... be faulty The troubleshooting instructions are divided into the following sec tions 1 Top troubleshooting map 2 Phone is totally dead 3 Power doesn t stay on or the phone is jammed 4 Flash programming doesn t work 5 Display is not working 6 Audio fault 7 Charging fault First carry out a thorough visual check of the module Ensure in particular that there is no mechanical damage soldered joints are...

Page 24: ...orporation Confidential Issue 1 04 2003 Top troubleshooting map Top Phone totally dead Flash program m ing doesn t w ork Phone doesn t start up or phone is jam m ed C harging doesn t w ork Top 2 Phone dead Flash faults Phone is jammed Charger YES NO YES NO YES NO NO YES ...

Page 25: ...oubleshooting BB RH 44 Issue 1 04 2003 Nokia Corporation Confidential Page 25 Top 2 A u d i o f a u l t s D isplay or LED s not w orking K e y p a d d o e s n t w o r k Audio faults Display faults Keypad faults END YES NO YES NO YES ...

Page 26: ...ne X110 R202 R203 C230 Are they OK Change UEM Repair Is phone flash programming OK If current is zero check X110 solder and VBATT lines If current is too high check for shorts Make sure all BB regulators are at their respective voltage levels e g VANA VIO VCRE DC DC VFlash1 and VR3 See phone s top view diagram for test points Make sure System Clk is 19 2MHz and Sleep Clk is 32KHz Make sure PURX an...

Page 27: ...r startup Measure BSI pulse during Flash programming Is it OK Check BSI line X110 C230 R203 R202 Measure FBusRx FBusTX and MBUS during flash programming at bottom connector Does waveform match Figure 2 Check R100 R101 R104 C104 C105 and V101 If OK then change UEM or UPP Phone does not set Flashbus TXD line low after the line has been high Change UEM Flash faults page 2 Yes No Yes No No No Yes Yes ...

Page 28: ...ntation Page 28 Nokia Corporation Confidential Issue 1 04 2003 Phone is jammed Flash faults page 2 Can you read manufacturer ID and device ID Change Flash Is phone totally dead Phone doesn t start up or phone is jammed Retest No Yes Yes No Yes No ...

Page 29: ...eepX at test points TP1 and TP2 Are they high 1 8V Check VBATT VIO VCORE VFlash1 VANA VR3 capacitors Are they OK See phone s top view diagram for cap location Jammed page 2 Measure 32kHz Clk crystal Is it OK Measure 19 2MHz Clk coming from VCTCXO at C524 Is it OK Check BSI BTEMP lines and VBATT lines If OK change UEM Repair Change B200 Change UEM Check 19 2MHz generator in RF section G503 C505 C52...

Page 30: ...kia Corporation Confidential Issue 1 04 2003 Jammed page 2 Phone shutdown after 32 seconds Has the phone been flashed Flash the phone Change UPP and re flash If problem still exists change UEM and reflash phone Read phone info Is it OK Re test Yes No Yes No Yes No ...

Page 31: ...ger Charger Connect charger Make sure battery is connected Battery bar doesn t work scroll Measure voltage over V100 Is it 3 0 Vdc Read BTEMP value Is it 25C 0319 Remove fuse F100 and measure current Is it 350 390 mA Re test Check X100 F100 L100 V100 C106 Change UEM Re test Change UEM No Yes No Yes No Yes No Yes ...

Page 32: ...x Baseband Audio Control and set the following Enable Tx Enable Rx Select MIC2 0dB Enable earpiece only Inject 1KHz sine signal 20mVp p on XMIC pin 9 10 of bottom connector Is signal coming out of UEM on EARP and EARN Probe signal on R162 R155 V152 C154 C155 R152 R150 C151 C153 L120 R180 Check bias voltage on one end of C193 2 1V If OK change the UEM Check R150 C180 and C181 If OK then change earp...

Page 33: ...wing Enable Tx Enable Rx Select MIC1 Enable HF only differential ended Talk through microphone Measure MICB1 voltage from MICP pads on bottom connector Is it 2 1V Check C195 R176 R178 If okay change UEM Is signal going to UEM at MICP and MICN at L122 and C174 If connection is OK at C174 and L122 then change microphone Is signal going out of UEM at XEAR pin 10 on bottom connector Check signal at R1...

Page 34: ...IDI working Measure VBATT voltage from C196 Is it OK Check VBATT line Set phone in LOCAL mode Use Phoenix to digital loop MIC1 to HF single ended output Also set GenIO 28 high Check signal at C157 Is signal OK Change UEM Check signal at MIDI speaker pads Is signal OK Change speaker Change UEM Audio faults 4 No No Yes No Yes Yes Yes ...

Page 35: ...easure VBATT voltage pin 1 of M300 Is it OK Check VBATT line Set phone in LOCAL mode Use Phoenix Message Sender and navigate as follows DEV_HOST DEV_PC PN_ACCESSORY PN_OBJ_ROUTING_REQ PN_OBJ_PC UTID_100 ACC_VIBRA_CTRL_REQ Select ACC_ON and click Send Measure UEM signal on pin 2 of M300 Is signal OK Change UEM Change vibra END No No Yes No Yes Yes ...

Page 36: ... Measure VBATT voltage at C310 Is it OK Check VBATT line Set phone to LOCAL mode Use Phoenix Message Sender and navigate as follows DEV_HOST DEV_PC PN_LIGHT OBJ_ROUTING_REQ OBJ_PC UTID LIGHT_CONTROL_REQ LIGHT_CONTROL_TARGER_KBD Select LIGHT_STATE_BLINK and click Send Measure UEM signal at R306 Is signal OK Change UEM Measure voltage at LEDs Is it OK Change LM 2795 Change LEDs Display faults 2 No N...

Page 37: ...it work Re test Set phone in LOCAL mode Use Phoenix Message Sender and navigate as follows DEV_HOST DEV_PC PN_TEST OBJ_ROUTING_REQ OBJ_PC UTID TEST_UI_TEST_REQ TEST_DISPLAY_SET NUM_SB TEST_SB_UI_DISPLAY_PATTERN SB_LENGTH Select TEST_PATTERN_ALTPIXELS and click Send Check signal at pin 1 1 2 0 4 data and 5 clock Are the signals OK Change UPP Change display END Yes No Yes No No Yes ...

Page 38: ...ration Confidential Issue 1 04 2003 Keypad faults Power key Keypad faults Is power key working Measure voltage at S300 Is it HIGH Check S300 and R304 If OK change UEM Measure voltage at S300 when power key is pressed Is it HIGH Change S300 Keypad faults 2 No No Yes Yes Yes ...

Page 39: ...Are UI modules keys working Change keypads module Is it working Re test Measure ROW0 4 signals between UPP and Z300 Are they 1 8V Make sure there are no shorts on Z300 If OK change UPP Measure ROW0 4 signals between Z300 and keypads Are they 1 8V Change Z300 Make sure there are no shorts on Z300 If OK change UPP No Yes No No Yes No Yes ...

Page 40: ...RH 44 Troubleshooting BB CCS Technical Documentation Page 40 Nokia Corporation Confidential Issue 1 04 2003 ...

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