Nokia Customer Care
6015/6015i/6016i/6019i (RH-55),
6012 (RM-20) Series Transceivers
Troubleshooting - Baseband
Issue 1 - Revision 002 09/2004 Company Confidential ©2004 Nokia Corporation
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)
Troubleshooting - Baseband Nokia Customer Care
Contents Page
Troubleshooting Overview............................................................................................................................ 4
Power Up and Reset ....................................................................................................................................7
Power Up - Power Key............................................................................................................................. 9
Power Up - Charger ................................................................................................................................. 9
Power Up - RTC Alarm.......................................................................................................................... 10
Power Off .....................................................................................................................................................10
Power Consumption and Operation Modes .......................................................................................10
Power Off ................................................................................................................................................. 10
Sleep Mode.............................................................................................................................................. 10
Active Mode ............................................................................................................................................ 11
Charging Mode....................................................................................................................................... 11
Power ............................................................................................................................................................11
Clock Distribution ......................................................................................................................................13
RFClk (19.2 MHz Analog)..................................................................................................................... 13
RFConvClk (19.2 MHz digital) ............................................................................................................ 13
CBUSClk Interface ................................................................................................................................. 14
DBUS Clk Interface................................................................................................................................ 15
SleepCLK (Digital) .................................................................................................................................. 16
SleepCLK (Analog).................................................................................................................................. 16
Flash Programming ...................................................................................................................................17
Connections to Baseband.................................................................................................................... 17
Baseband Power Up .............................................................................................................................. 17
Flash Programming Indication........................................................................................................... 17
Flashing..................................................................................................................................................... 18
Flash Programming Error Codes ........................................................................................................ 20
Charging Operation ...................................................................................................................................21
Battery ...................................................................................................................................................... 21
Charging Circuitry ................................................................................................................................. 22
Charger Detection .....................................................................................................................................22
Charge Control ....................................................................................................................................... 23
Audio .............................................................................................................................................................23
Display and Keyboard ...............................................................................................................................24
BB Test Points .............................................................................................................................................24
Top View................................................................................................................................................... 25
Bottom View............................................................................................................................................ 26
GPS Module (6015i/6016i/6019i) .........................................................................................................27
GPS Test Points ..........................................................................................................................................28
Top Troubleshooting Map ........................................................................................................................29
Phone is Totally Dead ...............................................................................................................................31
Flash Programming Does Not Work .....................................................................................................32
Phone is Jammed .......................................................................................................................................34
Charger Faults ................................................................................................................
Audio Faults ................................................................................................................................................37
Earpiece .................................................................................................................................................... 37
Microphone ............................................................................................................................................. 38
IHF.............................................................................................................................................................. 39
Vibra .......................................................................................................................................................... 40
............................36
Page 2 ©2004 Nokia Corporation Company Confidential Issue 1 - Revision 002 09/2004
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Nokia Customer Care Troubleshooting - Baseband
Display Faults ..............................................................................................................................................41
Keypad Faults .............................................................................................................................................43
Power Key ................................................................................................................................................ 43
UI Modules............................................................................................................................................... 44
GPS ................................................................................................................................................................45
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Nokia Customer Care Troubleshooting - Baseband
Troubleshooting Overview
The baseband module for the 6015/6015i/6015i/6019i, and 6012 transceivers include the
following:
Model Type Technology Memory
6012 RM-20 Analog and CDMA IS2000 Discrete
Flash: 64 Mb
SRAM: 4 Mb
6015 RH-55 Analog and CDMA IS2000 Discrete
Flash: 64 Mb
SRAM: 4 Mb
6015i RH-55 Analog and CDMA IS2000 Combo
Flash: 64 Mb
SRAM: 16 Mb
6016i RH-55 Analog and CDMA IS2000 Combo
Flash: 64 Mb
SRAM: 16 Mb
6019i RH-55 Analog and CDMA IS2000 Combo
Flash: 128 Mb
SRAM: 16 Mb
Frequency
(MHz)
800 No
800/1900 No
800/1900 Yes
800/1900 Yes
800/1900 Yes
GPS Module
The baseband consists the following main Application Specific Integrated Circuits
(ASICs):
• Universal Energy Management (UEM)
• Universal Phone Processor (UPP)
• FLASH and SRAM memory
The baseband architecture is based on the DCT4 Universe engine and supports a powersaving function called sleep mode. Sleep mode shuts off the VCTCXO, which is used as a
system clock source for both the RF and the baseband. The phone awakens by a timer
running from this 32 kHz clock. The sleep time is determined by network parameters.
During the sleep mode, the system runs from a 32 kHz crystal. The phone enters sleep
mode when both the MCU and the DSP are in standby mode, and the 19.2 MHz Clk
(VCTCXO) is switched off.
The 6015/6015i/6015i/6019i, and 6012 support both 2- and 3-DCT3 type wire chargers.
However, the 3-type wire chargers are treated as 2-type wire chargers. The UEM ASIC
and EM SW control charging.
A BL-6C Li-ion battery is used as the main power source. The BL-6C has a nominal
capacity of 1070 mAh.
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6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)
Troubleshooting - Baseband Nokia Customer Care
Charger
Bottom
Conn.
Sleep Clk
32 KHz
MBus
FBusRx
FBusT
x
Front
End
GPS
UEM
VR1A
VR1B
VR2
VR3
VR4
VR5
VR6
VR7
VCTCXO
19.2 MHz
VBatt
Battery
VIO
VANA
Vflash1
Vflash2
DC/DC
VCORE
VPPPRODTP
CBus
DBus
MBus
FBus
GenIO
Control
RF
Bus
UHF
SYNTH
Flash
ExtBusC
VR4
SRAM
VIO
ExtBusC
UPP
Core
Audio
LCD/Key_UI
VFlash1
VIO
VBatt
VBatt
Jupiter Batman
PA
VBatt
Figure 1: Baseband power distribution
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Nokia Customer Care Troubleshooting - Baseband
Power Up and Reset
Power up and reset are controlled by the UEM ASIC. The baseband can be powered up in
the following ways:
• By the Power button, which means grounding the PWRONX pin of the UEM
• By connecting the charger to the charger input
• By the RTC alarm, when the RTC logic has been programmed to give an alarm
After receiving one of the above signals, the UEM counts a 20ms delay and enters into
reset mode. The watchdog starts up, and if the battery voltage is greater than Vcoff+, a
200ms delay starts to allow references (etc.) to settle. After this delay elapses, the
VFLASH1 regulator is enabled. Then 500us later the VR3, VANA, VIO, and VCORE are
enabled. Finally, the PURX (Power Up Reset) line is held low for 20 ms. This reset (PURX)
is fed to the baseband ASIC UPP. Resets are generated for the MCU and the DSP. During
this reset phase, the UEM forces the VCTCXO regulator on — regardless of the status of
the sleep control input signal — to the UEM.
The FLSRSTx from the ASIC is used to reset the flash during power up and to put the
flash in power down during sleep. All baseband regulators are switched on when the
UEM powers on. The UEM internal watchdogs are running during the UEM reset state,
with the longest watchdog time selected. If the watchdog expires, the UEM returns to
the power-off state. The UEM watchdogs are internally acknowledged at the rising edge
of the PURX signal in order to always give the same watchdog response time to the MCU.
Figure 2 represents the UEM start-up sequence from reset to power-on modes.
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Troubleshooting - Baseband Nokia Customer Care
Reference signal
PwrOnX
Charger Detection
RTC
UEMRSTX
VCORE
VFlash1
VIO
VANA
VR3
19.2MHz Clk
PURX
Sleep Clock
t1 = 20ms
t1 t2 t4t3
t2 = 200ms
Figure 2: UEM start-up sequence
t3 = 500us
t4 = 20ms
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Nokia Customer Care Troubleshooting - Baseband
Power Up - Power Key
When the power key is pressed, the UEM enters the power up sequence. Pressing the
power key causes the PWRONX pin on the UEM to be grounded. The UEM PWRONX
signal is not part of the keypad matrix. The power key is only connected to the UEM,
which means that when pressing the power key, an interrupt is generated to the UPP
that starts the MCU. The MCU then reads the UEM interrupt register and notices that it
is a PWRONX interrupt. Then the MCU reads the status of the PWRONX signal using the
UEM control bus (CBUS). If the PWRONX signal stays low for a specific duration, the
MCU accepts 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 - Charger
In order to be able to detect and start charging in the case where the main battery is
fully discharged (empty) and hence the UEM has no supply (NO_SUPPLY or BACKUP
mode of UEM), charging is controlled by START-UP CHARGING circuitry.
Whenever a VBAT level is detected to be below master reset threshold (V
charging starts and is controlled by START_UP charge circuitry. Connecting a charger
Figure 3: Power up
MSTR-
),
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Troubleshooting - Baseband Nokia Customer Care
forces the VCHAR input to rise above the charger detection threshold (VCH
detection charging is started. The UEM generates 100 mA constant output current from
the connected charger's output voltage. The battery’s voltage rises as it charges, and
when the VBAT voltage level is detected to be higher than the master reset threshold
limit (V
), the START_UP charge is terminated.
MSTR+
Monitoring the VBAT voltage level is done by the charge control block (CHACON). A
MSTRX='1' output reset signal (internal to the UEM) is given to UEM's RESET block when
VBAT>V
and the UEM enter into the reset sequence.
MSTR+
If VBAT is detected to fall below V
It will restart if new rising edge on the VCHAR input is detected (VCHAR rising above
DET+
).
VCH
Power Up - RTC Alarm
If phone is in POWER_OFF mode when an RTC alarm occurs, a wake-up procedure begins.
After the baseband is powered ON, an interrupt is given to the MCU. When an RTC alarm
occurs during ACTIVE mode, an interrupt is generated to the MCU.
Power Off
DET+
during start-up charging, charging is cancelled.
MSTR-
) and by
The baseband switches into power off mode if any of following occurs:
• Power key is pressed
• Battery voltage is too low (VBATT < 3.2 V)
• Watchdog timer register expires
The UEM controls the power down procedure.
Power Consumption and Operation Modes
Power Off
During power off mode, power (VBAT) is supplied to the UEM, BUZZER, VIBRA, LED, PA
and PA drivers. During this mode, the current consumption is approximately 35 uA.
Sleep Mode
In sleep mode, both processors (MCU and DSP) are in stand-by mode. The phone enters
sleep mode only when both processors make this request. When the SLEEPX signal is
detected low by the UEM, the phone enters SLEEP mode. The VIO and VFLASH1
regulators are put into low quiescent current mode, VCORE enters LDO mode, and the
VANA and VFLASH2 regulators are disabled. All RF regulators are disabled during SLEEP
mode. When the UEM detects a high SLEEPX signal, the phone enters ACTIVE mode and
all functions are activated.
The sleep mode is exited either by the expiration of a sleep clock counter in the UEM or
by some external interrupt (a charger connection, key press, headset connection, etc.).
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Nokia Customer Care Troubleshooting - Baseband
In sleep mode, the VCTCXO (19.2 MHz Clk) is shut down and the 32 kHz sleep clock
oscillator is used as a reference clock for the baseband.
The average current consumption of the phone can vary depending mainly on the SW
state. However, the average consumption is about 6 mA in slot cycle 0.
Active Mode
In active mode, the phone is in normal operation; scanning for channels, listening to a
base station, and transmitting and processing information. There are several sub-states
in the active mode depending on the phone’s present state, such as burst reception, burst
transmission, if DSP is working, etc.
In active mode, SW controls the UEM RF regulators: VR1A and VR1B can be enabled or
disabled. These regulators work of the UEM charge pump. VSIM can be enabled or
disabled and its output voltage can be programmed to be 1.8 V or 3.3 V. VR2 and
VR4–VR7 can be enabled, disabled, or forced into low quiescent current mode. VR3 is
always enabled in active mode and disabled during sleep mode and cannot be controlled
by SW.
Charging Mode
Charging mode can be performed in parallel with any other operating mode. A BSI
resistor inside the battery indicates the battery type/size. The resistor value corresponds
to a specific battery type and capacity. This capacity value is related to the battery
technology.
The battery voltage, temperature, size and charging current are measured by the UEM,
and the UEM charging algorithm controls it.
The charging control circuitry (CHACON) inside the UEM controls the charging current
delivered from the charger to the battery. The battery voltage rise is limited by turning
the UEM switch off when the battery voltage reaches 4.2 V. The charging current is
monitored by measuring the voltage drop across a 220 mOhm resistor.
Power
In normal operation, the baseband is powered from the phone's battery. The battery
consists of one Lithium-Ion cell. The battery capacity is 1070 mAh.
The UEM ASIC controls the power distribution to the whole phone through the BB and RF
regulators excluding the power amplifier (PA) and the DC/DC, which have a continuous
power rail directly from the battery. The battery feeds power directly to the following
parts of the system:
•UEM
•PA
•DC/DC
• Buzzer
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Troubleshooting - Baseband Nokia Customer Care
•Vibra
• Display and keyboard lights
The UEM is the heart of the power distribution to the phone, which includes all the
voltage regulators. The UEM handles power-up hardware functions so the regulators are
not powered and the power-up reset (PURX) is not released if the battery voltage is less
than 3 V.
The baseband is powered from five different UEM regulators:
Table 1: Baseband Regulators
Regulator
VCORE
DC/DC
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 data cable is connected
VANA 80 2.78 Enabled only when the system is awake (off during sleep
VSIM 25 3.0 Enabled during power-up mode and scanning for a SIM
Maximum
Current (mA)
300 1.35 The power-up default value is 1.35V. The output voltage is
Vout (V) Notes
selectable: 1.0V/1.3V/1.5V/1.8V.
and power-off modes)
card
Table 2 includes the UEM voltage regulators used by the RF.
Table 2: RF Regulators
Regulator
Maximum
Current (mA)
Vout (V) Notes
VR1A 10 4.75 Enabled when the receiver is on
VR1B 10 4.75 Enabled when the transmitter is on
VR2 100 2.78 Enabled when the transmitter is on
VR3 20 2.78 Enabled when SleepX is high
VR4 50 2.78 Enabled when the receiver is on
VR5 50 2.78 Enabled when the receiver is on
VR6 50 2.78 Enabled when the transmitter is on
VR7 45 2.78 Enabled when the receiver is on
A charge pump used by VR1A is constructed around the UEM. The charge pump works
with Cbus (1.2 MHz Clk) and gives a 4.75 V regulated output voltage to the RF.
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Nokia Customer Care Troubleshooting - Baseband
Clock Distribution
RFClk (19.2 MHz Analog)
The baseband’s main clock signal is generated from the VCTCXO (G501). This 19.2 MHz
clock signal is generated at the RF and fed to the UPP’s RFCLK pin and the GPS BB ASIC.
RFConvClk (19.2 MHz digital)
The UPP distributes the 19.2 MHz Clk to the internal processors, DSP, and MCU, where
SW multiplies this clock by seven for the DSP and by two for the MCU.
Figure 4: 19.2 MHz analog
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Troubleshooting - Baseband Nokia Customer Care
CBUSClk Interface
A 1.2 MHz clock signal is used for CBUS, which is used by the MCU to transfer data
between the UEM and UPP.
Figure 5: 19.2 MHz digital
Figure 6: 1.2 MHz CBUS clock signal
Page 14 ©2004 Nokia Corporation Company Confidential Issue 1 - Revision 002 09/2004
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