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CCS Technical Documentation
RH-17 Series Transceivers
Troubleshooting -- BB
Issue 1 04/2003 Confidential Nokia Corporation
RH-17
Troubleshooting -- BB CCS Technical Documentation
Page 2 Nokia Corporation Confidential Issue 1 04/2003
RH-17
CCS Technical Documentation Troubleshooting -- BB
Contents
Page No
Troubleshooting - Baseband .......................................................................................... 5
Overview ......................................................................................................................5
BB and RF Architecture ..............................................................................................6
Power Up and Reset .....................................................................................................6
Power up with PWR key ..............................................................................................9
Power up when charger is connected ...........................................................................9
RTC alarm power up ...................................................................................................9
Power off .....................................................................................................................9
Power Consumption and Operation modes ...............................................................10
Power Distribution .....................................................................................................11
Clock Distribution .....................................................................................................12
RFClk (19.2 MHz Analog)...................................................................................... 12
RFConvClk (19.2 MHz digital) .............................................................................. 13
CBUSClk Interface ................................................................................................. 13
DBUSClk Interface ................................................................................................. 14
SLEEPClk (Digital)................................................................................................. 14
SLEEPClk (Analog)................................................................................................ 15
Flash programming ....................................................................................................16
Connections to Baseband ........................................................................................ 16
Baseband Power Up ................................................................................................ 16
Flash Programming Indication ................................................................................ 16
Flashing ......................................................................................................................17
Charging operation ....................................................................................................18
Battery ..................................................................................................................... 18
Charging circuitry ................................................................................................... 19
Charger Detection ................................................................................................... 20
Charge Control ........................................................................................................ 21
Audio .........................................................................................................................21
Display and Keyboard ...............................................................................................21
Accessory ...................................................................................................................22
Charging .................................................................................................................. 23
Tomahawk headset detection .................................................................................. 24
Accessory detection though ACI............................................................................. 26
RUIM (SIM Car)..................................................................................................... 27
Test Points .................................................................................................................29
Top view.................................................................................................................. 29
Bottom View ........................................................................................................... 31
Troubleshooting .........................................................................................................31
Top troubleshooting map ...........................................................................................32
Phone is totally dead ............................................................................................... 34
Flash programming doesn`t work ........................................................................... 35
Power doesn`t stay on or the phone is jammed....................................................... 37
Charger .................................................................................................................... 39
Audio faults ............................................................................................................. 40
Display faults........................................................................................................... 44
Keypad faults........................................................................................................... 47
Issue 1 04/2003 Nokia Corporation Confidential Page 3
RH-17
Troubleshooting -- BB CCS Technical Documentation
Page 4 Nokia Corporation Confidential Issue 1 04/2003
RH-17
CCS Technical Documentation Troubleshooting -- BB
Troubleshooting - Baseband
Overview
The Baseband module of RH-17 transceiver is a CDMA single band engine. The Baseband
architecture is based on the DCT4 Apollo engine.
RH-17 Baseband consists of three ASICs: Universal Energy Management (UEM), Universal
Phone Processor (UPP), and a 64-megabit Flash.
The Baseband architecture supports a power-saving function called "sleep mode". This
sleep mode shuts off the VCTCXO, which is used as system clock source for both RF and
Baseband. During the sleep mode, the system runs from a 32kHz crystal. The phone
awakes by a timer running from this 32kHz clock. The sleep is determined by network
parameters. Sleep mode is entered when both the MC and the DSP are in standby mode
and the normal VCTCXO clock is switched off.
RH-17 supports both 2- and 3-wire DCT3-type wire chargers. However, the 3-wire
chargers are treated as 2-type wire chargers. Charging is controlled by UEM ASIC and EM
SW.
BL-5C Li-ion battery is used as main power source for RH-17. BL-5C has nominal capac-
ity of 850 mAh.
Issue 1 04/2003 Nokia Corporation Confidential Page 5
RH-17
Troubleshooting -- BB CCS Technical Documentation
BB and RF Architecture
VBatt
PRODTP VPP
Battery
Flash
ExtBusC
Charger
Bottom
Conn. MBus VIO UPP
UEM
VCORE
FBusRx
FBusTx VANA
VR1A
CBus
VR1B
Vflash1 Core
VR2 DBus
VR3 Vflash2
MBus
VR4
Sleep Clk
32 KHz VR5 FBus
VR6
VR7
VCTCXO
19.2 MHz
RF LCD/Key
Bus
Front
End UHF
SYNTH
Robin Batman
PA
VBatt
Figure 1: RH-17 Power Distribution
Power Up and Reset
Power up and reset is controlled by the UEM ASIC. RH-17 baseband can be powered up
in the following ways:
1 By the Power button, which means grounding the PWRONX pin of the UEM
2 By connecting the charger to the charger input
Page 6 Nokia Corporation Confidential Issue 1 04/2003
RH-17
CCS Technical Documentation Troubleshooting -- BB
3 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 then enters in
reset mode. The watchdog starts up, and if the battery voltage is greater than Vcoff+, a
200ms delay is started to allow references etc. to settle. After this delay elapses the
VFLASH1 regulator is enabled. Then, 500us later 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 power-off state. The UEM watch-
dogs are internally acknowledged 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.
Issue 1 04/2003 Nokia Corporation Confidential Page 7
RH-17
Troubleshooting -- BB CCS Technical Documentation
Reference signal
PwrOnX
Charger Detection
RTC
UEMRSTX
VFlash1
VIO
VCORE
VANA
VR3
19.2MHz Clk
PURX
32kHz XTAL
t1 = 20ms t3 = 500us
t1 t2 t3 t4 t2 = 200ms t4 = 20ms
Page 8 Nokia Corporation Confidential Issue 1 04/2003
RH-17
CCS Technical Documentation Troubleshooting -- BB
Power up with PWR key
When the Power on 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 sig-
nal is not part of the keypad matrix. The power key is only connected to the UEM. This
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. The MCU now reads the status of the PWRONX signal using the UEM
control bus, CBUS. If the PWRONX signal stays low for a certain time, 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 when charger is connected
In order to be able to detect and start charging in the case where the main battery is
fully discharged (empty) and hence UEM has no supply (NO_SUPPLY or BACKUP mode of
UEM), charging is controlled by START-UP CHARGING circuitry.
Whenever VBAT level is detected to be below master reset threshold (VMSTR-), charging
starts and is controlled by START_UP charge circuitry. Connecting a charger forces
VCHAR input to rise above the charger detection threshold, VCHDET+, and by detection
charging is started. UEM generates 100mA constant output current from the connected
charger's output voltage. As battery charges, its voltage rises and when VBAT voltage
level is detected to be higher than the master reset threshold limit (VMSTR+), START_UP
charge is terminated.
Monitoring the VBAT voltage level is done by charge control block (CHACON). MSTRX=`1'
output reset signal (internal to UEM) is given to UEM's RESET block when VBAT>VMSTR+
and UEM enters into reset sequence.
If VBAT is detected to fall below VMSTR- during start-up charging, charging is
cancelled. It will restart if new rising edge on VCHAR input is detected
(VCHAR rising above VCHDET+).
RTC alarm power up
If phone is in POWER_OFF mode when RTC alarm occurs, a wake-up procedure occurs.
After baseband is powered ON, an interrupt is given to MCU. When RTC alarm occurs
during ACTIVE mode, an interrupt to MCU is generated.
Power off
The Baseband switches into power off mode if any of following statements is true