Nokia 3520 Service Manual 8 rh21 sysmod
Nokia Customer Care
RH-21 Series Transceivers
System Module
Issue 2 07/2004 2004 Nokia Corporation. Page 1
Company Confidential
RH-21 Company Confidential
System Module Nokia Customer Care
Page 2 2004 Nokia Corporation. Issue 2 07/2004
Company Confidential RH-21
Nokia Customer Care System Module
Contents
Page No
Transceiver RH-21......................................................................................................... 5
Introduction ..................................................................................................................5
Operational Modes .......................................................................................................6
Engine Module .............................................................................................................6
Environmental Specifications ................................................................................... 6
Temperature Conditions............................................................................................ 6
Baseband Module ........................................................................................................7
UEM ............................................................................................................................7
UEM introduction ..................................................................................................... 7
Regulators.................................................................................................................. 7
RF Interface............................................................................................................... 9
Charging Control....................................................................................................... 9
Digital Interface......................................................................................................... 9
Audio Codec.............................................................................................................. 9
UI Drivers................................................................................................................ 10
AD Converters......................................................................................................... 10
UPP8M .................................................................................................................... 10
Blocks...................................................................................................................... 10
Flash Memory ............................................................................................................10
Introduction ............................................................................................................. 10
User Interface Hardware .............................................................................................. 11
LCD ...........................................................................................................................11
Introduction ............................................................................................................. 11
Interface................................................................................................................... 11
Keyboard ....................................................................................................................11
Introduction ............................................................................................................. 11
Power Key ............................................................................................................... 11
Lights .........................................................................................................................11
Introduction ............................................................................................................. 11
Interfaces ................................................................................................................. 11
Technical Information ............................................................................................. 11
Vibra ..........................................................................................................................12
Introduction ............................................................................................................. 12
Interfaces ................................................................................................................. 12
Audio Hardware........................................................................................................... 12
Earpiece .....................................................................................................................12
Introduction ............................................................................................................. 12
Microphone ................................................................................................................12
Introduction ............................................................................................................. 12
MIDI Speaker ............................................................................................................12
Introduction ............................................................................................................. 12
Battery ........................................................................................................................13
Phone Battery .............................................................................................................13
Introduction ............................................................................................................. 13
Interface................................................................................................................... 13
Battery Connector ......................................................................................................14
Accessories Interface ................................................................................................... 15
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System Module Nokia Customer Care
System connector ......................................................................................................... 15
Introduction ............................................................................................................. 15
Interface................................................................................................................... 15
Technical Information ............................................................................................. 16
Charger IF ..................................................................................................................16
Introduction ............................................................................................................. 16
Interface................................................................................................................... 16
Test Interfaces .............................................................................................................. 17
Production Test Pattern ..............................................................................................17
Other Test Points .......................................................................................................17
EMC ............................................................................................................................. 17
General .......................................................................................................................17
BB Component and Control IO Line Protection .......................................................17
Keyboard lines......................................................................................................... 17
PWB ........................................................................................................................ 17
LCD......................................................................................................................... 18
Microphone ............................................................................................................. 18
EAR Lines/MIDI..................................................................................................... 18
System Connector Lines.......................................................................................... 19
Battery Connector Lines.......................................................................................... 19
M-bus F-bus ............................................................................................................ 19
Tranceiver Interfaces .................................................................................................19
BB - RF Interface Connections ..................................................................................19
BB Internal Connections ............................................................................................23
UEM Block Signal Description............................................................................... 23
UPP Block signals .....................................................................................................28
MEMORY Block Interfaces ......................................................................................31
...................................................................................................................................33
Audio Interfaces ...................................................................................................... 33
Baseband External Connections.............................................................................. 36
Test Pattern for Production Tests ............................................................................ 37
General Information About Testing ...........................................................................37
Phone operating modes ........................................................................................... 37
RF Module ................................................................................................................... 38
Requirements .............................................................................................................38
Temperature Conditions.......................................................................................... 38
Main Technical Characteristics .................................................................................39
RF Frequency Plan .................................................................................................. 39
DC Characteristics .....................................................................................................40
Power Distribution Diagram ................................................................................... 40
Regulators................................................................................................................ 41
Receiver................................................................................................................... 41
AMPS/TDMA 800 MHz Front End........................................................................ 42
TDMA 1900 MHz Front End.................................................................................. 42
Frequency Synthesizers........................................................................................... 44
Transmitter .............................................................................................................. 45
Antenna ......................................................................................................................47
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Company Confidential RH-21
A
Nokia Customer Care System Module
Transceiver RH-21
Introduction
The RH-21 (Model 3520) transceiver is a single-band TDMA800 transceiver unit.
The transceiver consists of engine module (1cb) and assembly parts.
The transceiver has a full graphic display and the user interface is based on the Jack 3.2
UI with two soft keys.
An internal antenna is used, there is no connection to an external antenna.
The transceiver has a low leakage tolerant earpiece and an omnidirectional microphone,
providing excellent audio quality.
TRANSCEIVER
ANT
EXT
RF
LCD DRIVER
B & W
display
BACKLIGHT
BACKLIGHT
✉
12 3
4
7
*
RF
☎
5
6
9
8
0#
ENGINE
USER IN T E R F AC E
EARPIECE
AUDIO
(disc r)
BUZZER
VIBRA
MIC
Ext. Audio
ccessories
Ostrich
BB
JTAG
Prod.TEST I/F
BSI
BTemp
BATTERY
CHARGER
Figure 1: Interconnecting Diagram
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Operational Modes
There are several different operational modes. Modes have different states controlled by
the cellular SW. Some examples are: Idle State (on ACCH), Camping (on DCCH), Scanning,
Conversation, No Service Power Save (NSPS) previously OOR = Out of Range.
In the power off mode, only the circuits needed for power up are supplied.
In the idle mode, circuits are powered down and only the sleep clock is running.
In the active mode, all the circuits are supplied with power although some parts might
be in idle state part of the time.
The charge mode is effective in parallel with all previous modes. The charge mode itself
consists of two different states (i.e., the fast charge and the maintenance mode).
The local mode is used for alignment and testing.
Engine Module
Environmental Specifications
Normal and extreme voltages
Voltage range:
• nominal battery voltage: 3.6 V
• maximum battery voltage: 5.2 V
• minimum battery voltage: 3.1 V
Temperature Conditions
Temperature range:
• ambient temperature: -30...+ 60 °C
• PWB temperature: -30...+85 °C
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Nokia Customer Care System Module
Baseband Module
The core parts of 3560/3520 BB consists of two ASICs—UEM and UPP—and flash memory.
The following sections describe these parts.
PA Supply
RF Supplies
RF RX/TX
EAR
MIC
LM4890
VIBRA
M
Battery
UEM
XEAR
DCT4 Janette connector
External Audio
Charger connection
Baseband
DLIGHT
KLIGHT
SLEEPCLK
32kHz
CBUS/
DBUS
BB
Supplies
MBus/FBus
MEMADDA
FLASH
Safari
RFBUS
UI
19.44MHz
UPP
UEM
UEM introduction
The UEM is the Universal Energy Management IC for DCT4 digital handportable phones.
In addition to energy management, it performs all the baseband mixed-signal functions.
Most UEM pins have 2kV ESD protection and those signals which are considered to be
exposed more easily to ESD have 8kV protection inside UEM. Such signals are all audio
signals, headset signals, BSI, Btemp, Fbus, and Mbus signals.
Regulators
The UEM has six regulators for BB power supplies and seven regulators for RF power supplies. The VR1 regulator has two outputs (VR1a and VR1b). In addition, there are two
current generators (IPA1 and IPA2) for biasing purposes.
A bypass capacitor (1uF) is required for each regulator output to ensure stability.
Figure 2: System Block Diagram (simple)
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Reference voltages for regulators require external 1uF capacitors. Vref25RF is reference
voltage for VR2 regulator, Vref25BB is reference voltage for VANA, VFLASH1, VFLASH2,
VR1 regulators, Vref278 is reference voltage for VR3, VR4, VR5, VR6, VR7 regulators,
VrefRF01 is reference voltage for VIO, VCORE, VSIM regulators, and for RF.
BB RF Current
VANA: 2.78Vtyp 80mAmax VR1a:4.75V 10mAmax
IPA1: 0-5mA
VR1b:4.75V
Vflash1: 2.78Vtyp 70mAmax IPA2: 0-5mA
Vflash2: 2.78Vtyp
VR2:2.78V 100mAmax
40mAmax
VSim: 1.8/3.0V 25mAmax VR3:2.78V 20mA
VIO: 1.8Vtyp
VR4: 2.78V 50mAmax
150mAmax
Vcore: 1.0-1.8V
VR5: 2.78V 50mAmax
200mAmax
VR6: 2.78V 50mAmax
VR7: 2.78V 45mAmax
VANA regulator supplies internal and external analog circuitry of BB. It is disabled in
sleep mode.
Vflash1 regulator supplies LCD, IR-module and digital parts of UEM and Safari asic. It is
enabled during startup and goes to low Iq-mode in sleep mode.
Vflash2 regulator is not used.
VIO regulator supplies both external and internal logic circuitries. It's used by LCD, flash,
and UPP. Regulator goes in to low Iq-mode in sleep mode.
VCORE regulator supplies DSP and Core part of UPP. Voltage is programmable and the
start-up default is 1.5V. Regulator goes to low Iq-mode in sleep mode.
VSIM regulator is not used.
VR1 regulator uses two LDOs and a charge pump. Charge pump requires one external 1uF
capacitor in Vpump pin and 220nF flying capacitor between pins CCP and CCN. VR1 regulator is used by Safari RF ASIC.
VR2 regulator is used to supply external RF parts, lower band up converter, TX power
detector module, and Safari. In light load situations, VR2 regulator can be set to low
Iq-mode.
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VR3 regulator supplies VCTCXO and Safari in RF. It's always enabled when UEM is active.
When UEM is in sleep mode, VR3 is disabled.
VR4 regulator supplies RF parts having low noise requirements. In light load situations,
VR4 regulator can be set to low Iq-mode.
VR5 regulator supplies lower band PA. In light load situations, VR5 regulator can be set
to low Iq-mode.
VR6 regulator supplies higher band PA and TX amplifier. In light load situations, VR6 regulator can be set to low Iq-mode.
VR7 regulator supplies VCO and Safari. In light load situations, the VR7 regulator can be
set to low Iq-mode.
IPA1 and IPA2 are programmable current generators. 27kW/1%/100ppm external resistor
is used to improve the accuracy of output current. IPA1 is used by lower band PA and
IPA2 is used by higher band PA.
RF Interface
The interface between the baseband and the RF section also is handled by UEM. It provides A/D and D/A conversion of the in-phase and quadrature receive and transmit signal
paths and also A/D and D/A conversions of received and transmitted audio signals to and
from the UI section. The UEM supplies the analog AFC signal to RF section according to
the UPP DSP digital control. It also converts PA & VCTCXO temperature into real data for
the DSP.
Charging Control
The CHACON block of UEM asics controls charging. Needed functions for charging controls are pwm-controlled battery charging switch, charger-monitoring circuitry, and battery voltage monitoring circuitry. In addition, external components are needed for EMC
protection of the charger input to the baseband module. The DCT4 baseband is designed
to support both DCT3 and DCT4 chargers from an electrical point of view.
Digital Interface
Data transmission between the UEM and the UPP is implemented using two serial connections, DBUS (programmable clock) for DSP and CBUS (1.0MHz GSM and 1.08MHz
TDMA) for MCU. UEM is a dual voltage circuit, the digital parts are running from 1.8V
and the analog parts are running from 2.78V. Vbat (3,6V) voltage regulator inputs also
are used.
Audio Codec
The baseband supports two external microphone inputs and one external earphone output. The inputs can be taken from an internal microphone, from a headset microphone,
or from an external microphone signal source through headset connector. The output for
the internal earpiece is a dual-ended type output, and the differential output is capable
of driving 4Vpp to the earpiece with a 60 dB minimum signal to total distortion ratio.
Input and output signal source selection and gain control is performed inside the UEM
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Asic according to control messages from the UPP. The buzzer and an external vibra alert
control signals are generated by the UEM with separate PWM outputs.
UI Drivers
There are discrete drivers for the MIDI speaker and keyboard LEDs. The drivers for vibra
and display are inside UEM.
AD Converters
There is an 11-channel analog-to-digital converter in UEM. The AD converters are calibrated in the production line.
UPP8M
RH-21 uses UPP8M ASIC. The RAM size is 8M. The UPP ASIC is designed to operate in a
DCT4 engine. The UPP processor architecture consists of both DSP and MCU processors.
Blocks
UPP is internally partitioned into two main parts:
The Processor and Memory System (i.e., Processor cores, Mega-cells, internal memories, peripherals, and external memory interface). This is known as the Brain.
The Brain consists of the blocks: the DSP Subsystem (DSPSS), the MCU Subsystem
(MCUSS), the emulation control (EMUCtl), the program/data RAM (PDRAM) and the
Brain Peripherals–subsystem (BrainPer).
The NMP custom cellular logic functions. This is known as the Body.
The Body contains all interfaces and functions needed for interfacing other DCT4 baseband and RF parts. Body consists of following sub-blocks: MFI, SCU, CTSI, RxModem,
AccIF, UIF, Coder, GPRSCip, BodyIF, SIMIF, PUP, and CDMA (Corona).
Flash Memory
Introduction
The RH-21 tranceivers use a 64-Mbit flash as its external memory. The VIO regulator is
used as a power supply for normal in-system operation. An accelerated program/erase
operation can be obtained by supplying Vpp of 12 volt to the flash device.
The device has two read modes: asynchronous and burst. The Burst read mode is utilized
in RH-21, except for the start-up, when the asynchronous read mode is used for a short
time.
In order to reduce the power consumpition on the bus, a Power Save function is introduced. This reduces the amount of switching on the external bus.
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User Interface Hardware
LCD
Introduction
RH-21 uses a color GD51 96 x 65 full dot-matrix graphical display. The LCD module
includes LCD glass, LCD COG-driver, spring connector, and metal frame. The LCD module
is included with the lightguide assembly module.
Interface
SW and the control signals are from the UPP asic. The VIO and Vflash1 regulators supply
the LCD with power. The LCD has an internal voltage booster and a booster capacitor is
required between Vout and GND.
Pin 3 (Vss) is the LCD driver's ground. LCD is controlled by UI SW and control signals.
Booster capacitor (C302 1 uF) is connected between booster pin (Vout) and ground. The
capacitor stores boosting voltage.
Keyboard
Introduction
The RH-21 keyboard follows the Jack III style.
PWR key is located on top of phone.
Power Key
All keyboard signals come from UPP asic, except pwr key signal, which is connected
directly to UEM. Pressing of pwr key is detected so that switch of pwr key connects
PWONX is of UEM to GND and creates an interrupt.
Lights
Introduction
RH-21 has LEDs for lighting purposes: two LEDs for keyboard and two LEDs for display.
LED type is TBSF (white).
Interfaces
Both the display and keyboard lights are controlled through a shared LED driver with a
constant current charge-pump circuit. The driver circuit is controlled by the Dlight signal
from UEM. With appropriate SW, the driver can be PWM controlled for dimming purpose.
Technical Information
LED locates in hole and terminals are soldered on the component side of the module
PWB. The LEDs have a white plastic body around the diode, and this directs the emitted
light better to the UI-side.
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The current for the LCD lights is limited by the resistor between the ISET pin of the LED
driver and ground. For the keyboard lights, there are resistors in parallel.
Vibra
Introduction
The vibra is located on D-cover and is connected by spring connectors on PWB. It is
located in the left bottom side of the engine.
Interfaces
The vibra is controlled by the PWM signal VIBRA from the UEM. With this signal, it is
possible to control both the frequency and pulse width of signal. Pulse width is used to
control current when the battery voltage changes. Frequency control makes it possible to
search for an optimum frequency to provide silent and efficient vibrating.
Audio Hardware
Earpiece
Introduction
The 13 mm speaker capsule that is used in DCT3 products is also used in RH-21.
The speaker is dynamic. It is very sensitive and capable of producing relatively high sound
pressure at low frequencies.
Microphone
Introduction
The microphone is an electret microphone with an omnidirectional polar pattern. It consists of an electrically polarized membrane and a metal electrode which forms a capacitor. Air pressure changes (i.e., sound) move the membrane, which cause voltage changes
across the capacitor. Becauce the capacitance is typically 2 pF, a FET buffer is needed
inside the microphone capsule for the signal generated by the capacitor. Because of the
FET, the microphone requires a bias voltage.
MIDI Speaker
Introduction
The speaker being used to generate MIDI ring tones is a 13mm SALT speaker. The SALT
speaker is mounted in the D-cover, kept in position by a double adhesive gasket that is
mounted on the front of SALT. The useful frequency range is approximately 340 Hz to
8KHz.
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Battery
Phone Battery
Introduction
The battery for the 3560/3520 is the BLC-2 (Li-Ion 1000 mAh).
Interface
The battery block contains BTEMP and BSI resistors for temperature measurement and
battery identification. The BSI fixed resistor value indicates the chemistry and default
capacity of a battery. BTEMP-resistor measures the battery temperature. Temperature
and capacity information is needed for charge control. These resistors are connected to
BSI and BTEMP pins of the battery connector. Phone has pull-up resistors (R202) for
these lines so that they can be read by A/D inputs in the phone (see figure below). There
also are spark gaps in the BSI and BTEMP lines to prevent ESD.
Figure 3: Battery Connections.
Batteries have a specific red line which indicates if the battery has been subjected to
excess humidity. The batteries are delivered in a "protection" mode, which gives longer
storage time. The voltage seen in the outer terminals is zero (or floating), and the battery
is activated by connecting the charger. Battery has internal protection for overvoltage
and overcurrent.
1 (+)2(BSI)3(BTEMP)4(GND)
Figure 4: BLC-2 Battery contacts.
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Battery Connector
RH-21 uses string type connector. This makes it easier to assemble the phone in production; and connection between battery and PWB is more reliable.
Signal
#
name
Connected
from - to
Batt I/O
Signal properties
A/D--levels--freq./timing
Description /
Notes
1 VBAT VBAT I/O Vbat 3.1-5.2V Battery volt-
age
2 BSI UEM Out Ana Battery size
indicator
3 BTEMP UEM Out Ana 40mA/
switch
400mA
Battery temperature indicator
4 GND Gnd Ground
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Accessories Interface
System connector
Introduction
RH-21 uses DCT4-accessories via DCT4 system connector.
Interface
The interface is supported by DCT4-compatible, fully differential 4-wire (XMICN, XMICP,
XEARN, and XEARP) accessories.
GND
VIN
PWMO
XMICP
XMICN
HF
HEADI HFC
MICN MIC
Figure 5: System Connector.
An accessory is detected by the HeadInt- line, which is connected to the XMIC. When
accessory is connected, it generates headint- interruption (UEMINT) to MCU. After that,
hookInt line is used to determine which accessory is connected. This is done by the voltage divider, which consists of phone's internal pull-up and accessory specific pull-down.
Voltage generated by this divider is then read by the ad- converter of UEM. The HookIntinterrupt is generated by the button in the headset or by the accessory external audio
input.
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