Nokia 2270, 2272, 2275, 2285 Service Manual 12 sys
CCS Technical Documentation
RH-3 Series Transceivers
System Module
Issue 1 06/2003 Confidential Nokia Corporation
RH-3
System Module CCS Technical Documentation
Page 2 Nokia Corporation Confidential Issue 1 06/2003
RH-3
CCS Technical Documentation System Module
Contents
Page No
Transceiver RH-3/RH-3P/RH-3DNG............................................................................ 5
Introduction ..................................................................................................................5
Operational Modes .......................................................................................................5
Engine Module .............................................................................................................7
Environmental Specifications ................................................................................... 7
Temperature Conditions............................................................................................ 7
Baseband Module ........................................................................................................7
UEM.......................................................................................................................... 8
BB-RF Interface Connections ....................................................................................10
UPP.......................................................................................................................... 12
Flash Memory ......................................................................................................... 13
User Interface Hardware ............................................................................................13
LCD......................................................................................................................... 13
Keyboard................................................................................................................. 14
Lights....................................................................................................................... 14
Vibra........................................................................................................................ 15
Audio Hardware .........................................................................................................15
Earpiece................................................................................................................... 15
Microphone ............................................................................................................. 15
Buzzer...................................................................................................................... 16
Battery ........................................................................................................................16
Phone Battery.......................................................................................................... 16
Battery Connector ................................................................................................... 17
Accessories Interface .................................................................................................17
System Connector ................................................................................................... 17
Charger IF ............................................................................................................... 21
Test Interfaces ............................................................................................................21
Production Test Pattern........................................................................................... 21
General Information About Testing........................................................................ 23
RF Module .................................................................................................................24
Requirements........................................................................................................... 24
Temperature Conditions.......................................................................................... 24
Main Technical Characteristics............................................................................... 24
Antenna ................................................................................................................... 24
Transmitter.............................................................................................................. 25
Synthesizer.............................................................................................................. 26
Receiver................................................................................................................... 28
GPS Engine.................................................................................................................. 29
Introduction ................................................................................................................29
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RH-3
System Module CCS Technical Documentation
Page 4 Nokia Corporation Confidential Issue 1 06/2003
RH-3
CCS Technical Documentation System Module
Transceiver RH-3/RH-3P/RH-3DNG
Introduction
The current RH-3 family includes Model 2285 (RH-3), Model 2270 (RH-3P), and
Model 2275 (RH-3DNG).
Model 2285 is a CDMA dual-mode engine (1900/800 MHz CDMA), supporting the CDMA
1XRTT Standard Air Interface. In addition, Model 2285 includes a built-in GPS engine
(GE) for E-911 emergency services.
Model 2270 is a PCS single-band CDMA 1900 engine, including a built-in GPS engine
(GE) for E-911 emergency services.
Model 2275 is a dual-band (PCS and Cell) engine. No GPS support is provided.
Note: The RH-3 family does NOT support AMPS.
The RH-3 family uses the following antennas:
• Planar Internal “F” Antenna (PIFA) — Models 2285, 2270, 2275
• external, extendable “whip” — Models 2285, 2270, 2275
• Global Positioning System (GPS) — Models 2285 and 2270 only
RH-3 features include an internal vibra, high-resolution display (96x65 pixels), a 2.5 mm
Universal headset connector with TTY/TDD support, GPS technology (Model 2285 and
2270), T9 predictive text input, and voice dialing, etc.
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 sleep mode, circuits are powered down and only the 32kHz sleep clock is running. In
slotted mode or idle mode (a combination of sleep mode and receive mode), some circuits will turn on some of the time during the wake-up slot to receive paging messaging
from the base station.
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).
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RH-3
G
P
S
_
I
N
T
_
U
C
L
K
System Module CCS Technical Documentation
The local mode is used for alignment and testing.
G
P
S
T
X
S
R
X
G
P
Timestamp
3
4
4
JTAG
STIBus
397
FlsCtrl
16
8
UPP8M
11
3
ExtAdDa[15:0]
ExtAd[23:16]
Flash
KeyB[10:0]
LCDCtrl
VIO
Keypad
PwrOnX
KLight/DLight/CalLED
Charger
M
X
C
I
X
E
A
R
FBus
MBus
Card
connector
Tomahawk
2 2
Headset
connector
TX_GATE
TX RF AGC PDM
TX IF AGC PDM
RX IF AGC PDM
VCore
k
l
v
t
n
C
a
n
X
o
s
v
I
u
B
DBus
C
SleepClk
Vibra
Microphone
Buzzer
Earpiece
332
2
Buffered 19.2 MHz
3
RFBus
2
D0-3
VR1A/B to VR7
AFC_DAC
PWR_OUT
19.2MHz
VCTCXO
D
n
R
C
x
M
o
o
U
i
u
E
C
d
P
A
RxIQD
TxIQD
U
F
u
R
A
2
2
UEM
& IQ Signals
Regulated supplies
4
4
VBat
BSI
TxIQ
RxIQ
O
I
V
FBus
MBus
SIMIF
VCore
SleepX
3
32 Khz
2
2
OSC1
OSC2
p
m
e
T
B
Iref1/2
Vref1/2
2.8-4.2v
LCD/
3LS2
2
2
2
4
SIM
4
Falcon Dual Band CDMA + GPS
VR7
VR3
PA_TEMP
VIO
SAW
PCS RF
P_DET
DET_ref
Tx_gate
PATemp
Vdc-dc
SPDT
Shamu
PCS PA
VHF PLL
UHF PLL
VHF VCO
JEDI_B
Det_Buffer
Upconverter, Driver
CELL/PCS: Modulator,
TX VHF LO
2
CELL RF SAW
PCS UHF
Dual Reg
VR8 VR9
VR8 & VR9
FIL_SEL1 & 2
Vbat
CELL UHF
Orca
Cell PA
Iref1,2
Vref1,2
VCO
UHF_CP
VCO
VR3 VR6 VR7
VIO
UHF Cell LO
UHF PCS LO
Cell_vco_sel
PCS_vco_sel
YODA
& VHF PLL
IFVGA, IQ Demod,
BB Filters, VHF VCO
Rx_SW1
Rx_SW2
LO
PCS/CELL_SEL
183.6 IF
VR5
ALFRED
LNA, RFA,
SAW
PCS RF
mixer & IFA
VR4
PCS
RX VHF
SAW
CELL RF
Cellular
Diplexer
Isolator
Cellular
Duplexer
Vbat
Dc-DC
Converter
VR2
D2
D0
D1
Power
Detector
Isolator
PCS
Duplexer
Figure 1: Interconnecting Diagram
Page 6 Nokia Corporation Confidential Issue 1 06/2003
RH-3
CCS Technical Documentation System Module
Engine Module
Environmental Specifications
Normal and extreme voltages
Voltage range:
• nominal battery voltage: 3.6 V
• maximum battery voltage: 4.5 V
• minimum battery voltage: 3.2 V
Temperature Conditions
Temperature range:
o
• ambient temperature: -30...+ 60
C
• PWB temperature: -30...+85o C
Baseband Module
The core part of the RH-3 baseband module consists of three ASICs — UEM and UPP —
and Flash memory. The following sections describe these parts.
Pathfi
nder
19.2
MHz
Figure 2: Baseband module diagram
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RH-3
System Module CCS Technical Documentation
UEM
UEM Introduction
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 of UEM pins have 2kV ESD protection. Those signals that 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
UEM has six regulators for baseband power supplies and seven regulators for RF power
supplies. VR1 regulator has two outputs VR1a and VR1b.
Bypass capacitor (1uF) is required for each regulator output to ensure stability.
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
VANA: 2.78Vtyp 80mA max VR1a: 4.75V 10mA max
VR1b: 4.75V 10mA max
Vflash1: 2.78Vtyp 70mA max
Vflash2: 2.78Vtyp
40mA max
VSim: 1.8/3.0V 25mA max VR3: 2.78V 20mA max
VIO: 1.8Vtyp
150mA max
Vcore: 1.0-1.8V
100mA max
VR2: 2.78V 100mA max
VR4: 2.78V 50mA max
VR5: 2.78V 50mA max
VR6: 2.78V 50mA max
VR7: 2.78V 45mA max
VANA regulator supplies internal and external analog circuitry of BB. It is disabled in
sleep mode.
Vflash1 regulator supplies LCD and digital parts of UEM ASIC. It is enabled during startup
and goes to low Iq-mode in sleep mode.
VIO regulator supplies both external and internal logic circuitries. It is used by LCD, flash,
Jedi, Yoda, GPS RF and GPS Baseband, and UPP. Regulator goes in to low Iq-mode in
sleep mode.
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RH-3
CCS Technical Documentation System Module
VCORE supplies DSP, Core part of UPP, and GPS Baseband ASIC. Voltage is programmable
and the startup default is 1.5V. Regulator goes to low Iq-mode in sleep mode.
VR1 regulator (VR1a, VR1b) uses two LDOs and a charge pump. VR1a is used to bias the
cellular PA and VR1b is for PCS PA.
VR2 is a linear regulator used to supply Jedi RF ASIC.
VR3 is a linear regulator used by Yoda RF ASIC and VCTCXO circuitry.
VR4 is a linear regulator used by Alfred’s LNA RF front end ASIC circuitry.
VR5 is a linear regulator used by the Jedi RFIC.
VR6 is a linear regulator used by Jedi RF ASIC.
VR7 is a linear regulator used by Jedi and Yoda RF ICs.
RF Interface
In addition to the RF regulators mentioned, UEM handles the interface between the
baseband and the RF section. 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 the RF section according to the UPP DSP digital control. It also
converts PA temperature into real data for the DSP. The UPP controls the RFIC through
the 3-wire RFIC bus. UPP also provides PDM regulator for RF interface (RX/TX AGC control).
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 electrically support both DCT3 and DCT4 chargers.
Digital Interface
Data transmission between the UEM and the UPP is implemented using two serial connections, DBUS (9.6 MHz) for DSP and CBUS (1.2 MHz in CDMA) for MCU. UEM is a dualvoltage circuit: the digital parts are running from 1.8V and the analog parts are running
from 2.78V. Vbat (3.6V) voltage regulators 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 a headset connector. The output
for the internal earpiece is a differential 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
Issue 1 06/2003 Nokia Corporation Confidential Page 9
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