Nokia Customer Care RH-37 Series Transceivers 7 - System Module Issue 1 07/04 2004 Nokia Corporation Company Confidential Page 1
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RH-37 System Module Nokia Customer Care Table of Contents Page No Glossary of Terms..................................................................................................................................... 7 Baseband................................................................................................................................................. 10 Block diagram ........................................................................................................................
RH-37 System Module Nokia Customer Care Test possibility ................................................................................................................................. 27 FCI ...........................................................................................................................................................27 Function.............................................................................................................................................
RH-37 System Module Nokia Customer Care Transmitter signal paths ............................................................................................................... 55 Frequency synthesizer signals..................................................................................................... 56 Printed Wired Board ............................................................................................................................ 57 RF key component placement .....................
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RH-37 System Module Nokia Customer Care Glossary of Terms ACI Accessory Control Interface ADC Analogue to Digital Converter AFC Automatic Frequency Control ASIC Application Specific Integrated Circuit ASM Antenna switch module BB Baseband BSI Battery Size Indicator DCT4 Digital Core Technology, generation 4 DSP Digital Signal Processor DUT Device under test EDGE Enhanced Data Rates for Global Evolution EGPRS Enhanced General Packed Radio Service EMC Electro Magnetic Compatibility
RH-37 System Module Page 8 Nokia Customer Care IMEI International Mobile Equipment Identity I/O Input/Output IR Infrared IrDA Infrared Data Association LCD Liquid Crystal Display LED Light Emitting Diode LDO Low Drop Out LNA Low Noise Amplifier LO Local Oscillator MCU Micro Controller Unit PA Power Amplifier Phoenix SW tool of DCT4 PLL Phase Locked Loop PWB Printed Wired Board RF Radio Frequency RTC Real Time Clock RX Receiver SA Spectrum analyzer SIM Subscriber Ident
RH-37 System Module Nokia Customer Care UPP Universal Phone Processor USB Universal Serial Bus VBU Back-up Battery Cut Off voltage (typical: 2.0 V) VCO Voltage controlled oscillator VCTCXO Voltage controlled temperature compensated oscillator V Master Reset Threshold (typical: 2.
RH-37 System Module Nokia Customer Care Baseband The RH-37 product is a DCT4.5 Expression segment phone. There are two variants: An EGSM900/GSM1800/GSM1900 phone and a US variant, RH 49, with GSM850/1800/ 1900.
RH-37 System Module Nokia Customer Care Block diagram Figure 1: Baseband block diagram UEMEK supplies both baseband and RF with power via built in voltage regulators, which are connected to the battery. The RF parts use mainly 2.78 V and the baseband parts 1.8V I/O voltage. The UPP core is supplied with programmable core voltage of 1.0V, 1.3V or 1.5V. UEMEK includes 7 linear LDO (Low Drop-Out) regulators for baseband and 7 regulators for RF.
RH-37 System Module Nokia Customer Care speed of 1 MHz. The DBUS is controlled by the MCU and operates at a speed of 13 MHz. Both processors are located in the UPP. The UEMEK ASIC handles the analog interface between the Baseband and the RF section. UEMEK 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 user interface.
RH-37 System Module Nokia Customer Care Environmental Specifications Absolute maximum ratings Table 1: Absolute maximum ratings Signal Note Battery Voltage (Idle) -0.3…5.5V Battery Voltage (Call) Max 4.8V Charger Input Voltage -0.
RH-37 System Module Nokia Customer Care Frequencies in baseband Table 4: Frequencies in baseband Frequency Context UPP UEMEK 100 kHz FCI X X 32 kHz SleepClk 1 MHz CBUS X X Up to 1 MHz RFConvClk X X 6,5 MHz Display IF X 3,25 MHz SIMIF 13 MHz DBUS, RFBUClik X 26 MHz RF Clk X 52 MHz Memory Clock X Flash SIM Comment X Estimation X X Min X X PWB Characteristics of the PWB • Single PWB • 8 layer board • Double side assembled Key components Figure 2: Key components
RH-37 System Module Nokia Customer Care Table 5: Key components Position Component Name Code D1470 HW Accelerator 4377033 D2800 UPP8M v 3.5 4371105 D2200 UEMEKv2.
RH-37 System Module Nokia Customer Care Technical Specifications Baseband core UPP Main characteristics of the used UPP are: • DSP, LEAD3 16 bit DSP core 32 bit IF max.
RH-37 System Module Nokia Customer Care • Voltage reference for analogue blocks • Charging function • Baseband regulators • RF regulators • RF interface converters External SRAM and Flash The Combo-Memory is a multi chip package memory which combines 128 Mbit (8Mx16) muxed burst multibank flash and 16 Mbit muxed CMOS PSRAM (Pseudo SRAM: DRAM with SRAM interface). The combo is supplied by single 1,8 V for read, write and erase operations. For accelerated flash programming, Vpp = 9.
RH-37 System Module 2 Backup 3 Acting Dead 4 Active 5 Sleep 6 Charging Nokia Customer Care No Supply In NO_SUPPLY mode, the phone has no supply voltage. This mode is due to the disconnection of the main battery and backup battery or low battery voltage level in both of the batteries. The phone is exiting from NO_SUPPLY mode when sufficient battery voltage level is detected.
RH-37 System Module Nokia Customer Care Sleep Mode Sleep mode is entered when both MCU and DSP are in stand–by mode. Both processors control the sleep mode. When SLEEPX signal (low) is detected UEMEK enters SLEEP mode. VCORE, VIO and VFLASH1 regulators are put into low quiescent current mode. All the RF regulators are off in SLEEP. When SLEEPX=1 detected UEMEK enters ACTIVE mode and all functions are activated.
RH-37 System Module Nokia Customer Care Figure 4: Power Distribution Diagram Baseband CAMERA To RF Parts UEME RF Regulators LCD LEDs 6 SIM VSIM VFLASH1 VAUX3 VR1A VR1B VR2-7 VCORE VLED+ UPP VANA Baseband Regulators White LED Driver VAUX2 Combo Memory VIO RTC VFLASH1 CHACON Battery VBAT VBAT Vout PA Supply System Connector FCI DC characteristics Supply voltage ranges Table 6: Battery voltage ranges Signal Min Nom Max Note VBAT 3.1V 3.7V 4.2V 3.2V SW cut off 2.
RH-37 System Module Nokia Customer Care Baseband regulators Table 7: Regulator specification Regulator Load current (mA) Limit (V) Min/Max (Typ) VCORE 200 1.476 / 1.65 (1.57) VIO 150 1.72 / 1.88 (1.8) VSIM1 25 1.745 / 1.855 (1.8) VANA 80 2.70 / 2.86 (2.78) VFLASH1 70 2.70 / 2.86 (2.78) VAUX2 70 2.70 / 2.86 (2.78) VAUX3 10 2.70 / 2.86 (2.78) VR2 100 2.70 / 2.86 (2.78) VR3 20 2.70 / 2.86 (2.78) VR4 50 2.70 / 2.86 (2.78) VR5 50 2.70 / 2.86 (2.78) VR6 50 2.70 / 2.86 (2.
RH-37 System Module Nokia Customer Care Function Groups Battery A battery of the type BL-5B is used. It is a Li Ion based standard cell. The battery capacity is 760mAh. The battery has a three-pin connector (BTEMP is not used). The battery does not support temperature measurement inside the battery pack. In order to get temperature information of the battery, the NTC mounted on the PWB within the BB area is used. Ni based batteries are not supported. The BSI resistor has a nominal value of 75 kOhm.
RH-37 System Module Nokia Customer Care Figure 6: Internal microphone connection Internal speaker The internal earpiece is a dynamic earpiece with an impedance of 32 ohms. The earpiece is low impedance one since the sound pressure is to be generated using current and not voltage as the supply voltage is restricted to 2.7V. The earpiece is driven directly by the UEMEK and the earpiece driver (EARP & EARN outputs) is a fully differential bridge amplifier with 6 dB gain.
RH-37 System Module Nokia Customer Care Block diagram of IHF. For RH-37, the Integrated Hands Free Speaker is used to generate hands free speech, and also polyphonic ringing tones. The speaker capsule is mounted into the A Cover, and spring contacts are used to connect the IHF Speaker contacts to the PWB. The IHF is furthermore used to generate alerting and warning tones. External audio RH-37 is designed to support a fully differential external audio accessory connection.
RH-37 System Module Nokia Customer Care Figure 8: Camera module Key features • VGA resolution sensor • On-chip viewfinder • Video data interface – CCP • Command interface CCI • 2,8/1,8 V operation • On board 11 bit ADC • Automatic exposure control (AEC) • Automatic white balance (AWB) • Small physical size • Ultra low power standby mode • On board PLL Issue 1 07/04 Nokia Corporation Page 25
RH-37 System Module Nokia Customer Care Specifications Table 8: Camera specification Feature Description Resolution 480 x 640 pixels Size 10,6 x 8,7 x 5,8 mm Sensor technology 0,35 µm HCMOS6i Pixel size 5,6 x 5,6 µm Signal to noise 35 dB @ 100 lux Minimum illumination < 10 lux Lens f# 2.
RH-37 System Module Nokia Customer Care UIF bus UIF is a slow (6,5 MHz) bus which may be shared with other UI functions (e.g. LCD). This version has unidirectional TX and Rx data lines and consists of a chip enable, chip select, Tx data, Rx data, data clock and system clock. Clocks The cameras and HWA can use 19.44MHz, 19.2MHz, 16.8MHz and 13MHz clocks in CCP/ CCI mode. The cameras can also use the half-frequencies. The HWA can use 16.8MHz, 13MHz, 9.72MHz, 9.6 MHz and 8.4MHz clocks for UIF mode.
RH-37 System Module Nokia Customer Care Function FCI operation is based on a few main principles. The external module is attached to the terminal, application (typically Java application) is downloaded to the terminal memory and it is automatically started (the first time module is attached to the terminal).
RH-37 System Module Nokia Customer Care Figure 11: FCI interface schematic Terminal Functional Cover FCI ASIP EN VBAT Switch + Short Circuit protection ferrite FC_Vout ferrite Reg. Cout Cin VIO GenIO_18 GenIO_22 UPP GenIO_2 GenIO_25 ferrite FC_SDA ferrite ferrite FC_SCL ferrite ferrite FC_INT MCU ferrite Test possibility Phoenix FCI Test For troubleshooting see FCI faults in Baseband Troubleshooting Instructions.
RH-37 System Module Nokia Customer Care Characteristics Table 9: LCD Characteristics Active display area format 130 columns x 130 rows UserInterface display area format 128 columns x 128 rows Module size (width x height x thickness) 33,9 mm x 41.3 mm x 3.
RH-37 System Module Nokia Customer Care LCD connector The TE signal is not used. Table 10: LCD connector Pin No: Description Type Symbol Parameter 1 Power supply OUT VLED- LED power supply current 2 Power supply voltage IN VDDI Operating voltage 1.
RH-37 System Module Nokia Customer Care Figure 12: LCD display Connector type (Plug) Hirose DF23C-12DP-0.5V 6 1 1 6 7 12 12 7 Top view Back view Test possibility Phoenix Display Test For troubleshooting see Display faults in Baseband Troubleshooting Instructions. Keypad The RH-37 keys are connected to the UPP via the KEYB(10:0) bus. The keypad consists of a 5x4 matrix of 5 rows, ROW0 – ROW4, and 4 columns, COL1 – COL4.
RH-37 System Module Nokia Customer Care Figure 13: RH-37 keypad When there is no key pressed, all the inputs from the rows are high since UPP has internal pull-up resistors on all those lines. All the columns are low at this state. When a key is pressed, the specific row where the key is placed is pulled low. This generates an interrupt to the MCU and the MCU now starts its scanning procedure. The procedure first sets all the columns high (KEYB (1) to KEYB (4)) and then one by one low again.
RH-37 System Module Nokia Customer Care Figure 14: Illumination VBAT UEME DLIGHT Keybord light DC/DC-Converter Vin VLED+ EN VLED- LCD Backlight GEN I/O 19 Test possibility Phoenix LED test For troubleshooting see Display faults in Baseband Troubleshooting Instructions. XPress on grip LEDs RH-37 uses 10 different controllable LEDs for light effects. For each LED one transistor serves as switch and current limiter. 33 resistors limit the current to an appropriate value.
RH-37 System Module Nokia Customer Care SIM The whole SIM interface locates in UPP and UEMEK. The interface part in the UEMEK contains power up/down, port gating, card detect, data receiving, ATR-counter, registers and level shifting buffers logic. The SIM interface is the electrical interface between the Subscriber Identity Module Card (SIM Card) and mobile phone (via UEMEK device). Both 3V and 1.8V SIM cards are supported. A register in the UEMEK selects SIM supply voltage.
RH-37 System Module Nokia Customer Care Interfaces BB-RF interface The interface between the Baseband and RF can be divided into three categories: • The digital interface from UPP to the RF ASIC (Helgo). The serial digital interface is used to control the operation of different blocks in the RF ASICs • The analogue interface between Baseband and RF. The analogue interface consists of Tx and Rx converter signals. The power amplifier control signals TXC and AFC also come from the UEMEK.
RH-37 System Module Nokia Customer Care Table 11: System connector interface description Pin # Signal 1 VCHAR 2 GND Charge ground 3 ACI Insertion & removal detection / Serial data bi-directional 1 kbit/s 4 Vout Power supply for external accessories 5 Notes Not used in RH-37 6 FBUS_RX Serial data from accessory to phone / 115 kbit/s 7 FBUS_TX Serial data from phone to accessory / 115 kbit/s 8 GND Data ground 9 XMIC N Negative audio in signal 10 XMIC P Positive audio in signal
RH-37 System Module Nokia Customer Care Table 12: System connector interface description Pin # Signal Notes 1 VCHAR 2 GND Charge ground 3 ACI Insertion & removal detection / Serial data bi-directional 1 kbit/s 4 Vout Power supply for external accessories 5 Not used in RH-37 6 FBUS_RX Serial data from accessory to phone / 115 kbit/s 7 FBUS_TX Serial data from phone to accessory / 115 kbit/s 8 GND Data ground 9 XMIC N Negative audio in signal 10 XMIC P Positive audio in signal
RH-37 System Module Nokia Customer Care PC via DKU-5. VOUT The VOUT pin delivers the power supply for PopPortTM accessories, which are using the ACI or FBUS. The voltage level is 2.78V / 70mA. DC plug NMP standard 2- or 3-wire chargers are compatible with the charger IF. The IF does not support 3-wire charging control. Nevertheless, it is potential possible to use a 3-wire charger without PWM charging support. RH-37 uses a 3mm DC plug besides the PopPortTM IF.
RH-37 System Module Nokia Customer Care Component Placement Hints When exchanging components, all components must be placed properly.
RH-37 System Module Nokia Customer Care proper functionality of the switch. Guiding Pins Corner Marks Helgo RF-chip (N7500) There are also corner marks introduced in order to help checking the placement after rework. The placement shall be done with proper equipment. The corner marks indicate proper placement after the soldering process. If the component is not placed properly the re-work process must be repeated until the component fits properly.
RH-37 System Module Nokia Customer Care Camera socket (X1470) There are also corner marks introduced in order to support placement and checking placement after rework process. Hardware accelerator (D1470) There are also corner marks introduced in order to enable checking placement after rework process.
RH-37 System Module Nokia Customer Care UEM (D2800) There are also corner marks introduced in order to help checking placement after rework process. Flash (D3000) There are some corner marks introduced. SIM card reader (X2700) There are some corner marks introduced. System connector (X2002) There are also some marks introduced (bars) in order to help placing the system connector and checking placement after rework.
RH-37 System Module Nokia Customer Care UEM (D2200) There are also corner marks introduced in order to help checking placement after rework.
RH-37 System Module Nokia Customer Care Battery connector (X2000) There are also some corner marks introduced in order to support placement of the connector and checking placement after rework. X-press on grip LED’s (V2402, V2403, V2404, V2405, V2406, V2407) When X-press on grip LED’s are exchanged, it must be checked that they are installed within the PWB outline in order to avoid mechanical shocks from the X-press on grip mechanics. Therefore, they must not trespass the ‘golden line’.
RH-37 System Module Nokia Customer Care Label placement Different countries require different labels. This guide explains where it is possible to place these labels. In the figure below, there are numbered shaded areas (1 - 5) where labels can be placed. On the right hand side there are numbers and labels. The numbers refer to the place where the label is allowed to be placed.
RH-37 System Module Nokia Customer Care RF Module Description The RF module performs the necessary high frequency operations of the triple-band engine. Both the transmitter and receiver have been implemented by using a direct conversion architecture, which means that the modulator and demodulator operate on the channel frequency. No intermediate frequencies are used for up- or down-conversion. The core of the RF is an application-specific integrated circuit (RF ASIC), Helgo85.
RH-37 System Module Nokia Customer Care General specifications of the transceiver Parameter Unit Cellular System GSM900, GSM1800, GSM1900 Modulation schemes GMSK, 8-PSK RX Frequency Band GSM900: 925 … 960 MHz GSM1800: 1805 ... 1880 MHz GSM1900: 1930 … 1990 MHz TX Frequency Band GSM900: 880 … 915 MHz GSM1800: 1710 ... 1785 MHz GSM1900: 1850 … 1910 MHz Output Power GMSK GSM900: +5 … +33 dBm (3.2 mW … 2 W) GSM1800: +0 … +30 dBm (1.0 mW … 1 W) GSM1900: +0 … +30 dBm (1.
RH-37 System Module Nokia Customer Care Figure 19: RF frequency plan Helgo I-signal GSM900: 925-960 MHz Q-signal RX GSM1800: 1805-1880 MHz GSM1900: 1930-1990 MHz f/2 f/4 f f 32963980 MHz f f f/2 f/4 PLL AFC GSM1800: 1710-1785 MHz 26 MHz VCTCXO GSM1900: 1850-1910 MHz Buffer VCTCXO 26 MHz I-signal Q-signal GSM850: 824-849 MHz GSM900: 880-915 MHz TX RF power supply configuration All power supplies for the RF unit are generated in the UEM ASIC, which contains among other functions six pieces
RH-37 System Module Nokia Customer Care Figure 20: RF power distribution diagram UEM VR1 VR2 4.75 V [ 4.6V ... 4.9V ] 2.78 V [ 2.70V ... 2.86V ] charge pump (VCP) Tx modulator (Vcc_ModOut) TX buffer & EDGE ALCs (VRF_TX) 2.78 V [ 2.70V ... 2.86V ] VCTCXO (+VCC) VR3 digital interface (VDIG) 2.78 V [ 2.70V ... 2.86V ] Rx Front End (VRF_RX) VR4 Bias & Rx CH filters (VF_RX) RF controls (VPAB_VLNA) VR5 2.78 V [ 2.70V ... 2.86V ] PLL prescaler (VPRE) phasing dividers of Rx (VLO) VR6 2.
RH-37 System Module Nokia Customer Care • VCO module Figure 21: RF block diagram VLNA 1900 Rx VRF_RX RXIP Balun SAW RF Front-end Module LNAB_P LNA_P HB BP 1800 Rx LC LB LP SAW RXQP VF_RX VBB INTEGRATED LOW-PASS FILTERS LC ESD 900 Rx FILTER SAW AND AGC FUNCTION VDIG BUILT-IN DC COMP.
RH-37 System Module Nokia Customer Care VANT_2 VANT_3 VANT_1 Rx1 Rx2 Rx3 Tx1 Tx2 VC1 VC2 VC3 GSM GSM GSM GSM GSM 900 1800 1900 900 1800/1900 [Volt] [Volt] Rx 0 0 0 X 0 0 0 0 2.6 2.6 0 2.6 0 2.6 2.6 0 [Volt] Rx Rx Tx Tx X X X X To switch the TX-GSM 1800/1900 path both signals VANT2 and VANT3 have to be activated. Receiver Each receiver path is a direct conversion linear receiver.
RH-37 System Module Nokia Customer Care grated in the RF ASIC (Helgo) except for the VCTCXO, VCO, and the loop filter. The VCTCXO (Voltage Controlled Temperature Compensated Crystal Oscillator) generates the clock frequency of 26 MHz. This frequency is buffered in the RF ASIC and fed to the UPP. Additionally, it is used as the reference frequency for the RF PLL.
RH-37 System Module Nokia Customer Care input to output ports: • GSM 900: 1.3 dB • GSM 1800: 1.6 dB • GSM 1900: 1.6 dB The SAW filters provide the wanted out-of-band blocking immunity. The SAW filters have approximately 2.5 to 3 dB insertion loss. The GSM 900 and the GSM 1800 filters are matched to the corresponding LNA inputs of the RF ASIC with a differential matching network (LC-type). The filters are used to convert the single-ended to a balanced signal, required as input for the RF ASIC.
RH-37 System Module Nokia Customer Care The differential base band amplifiers are internally DC-coupled. Their common mode levels are set equal to the external reference voltage VrefRF01. The base band outputs RXIP and RXQP are single-ended and connected directly to the differential ADC inputs (RXI◊RXIINP and RXQ◊RXQINP) of the UEM-ASIC. Its common mode level is set equal to the external reference voltage VrefRF02.
RH-37 System Module Nokia Customer Care it to a single-ended signal. Both paths are connected to the power amplifier module via a 1dB attenuator. This module generates the required RF level to transmit a 2W signal in the low band and a 1W signal in the two high bands. It contains two separate amplifiers for low band and high band. The output signals of the PA module are fed to the antenna switch module, where the active signal is connected to the antenna port.
RH-37 System Module Nokia Customer Care Printed Wired Board Figure 22: Assembled PWB with shielding chambers Issue 1 07/04 Nokia Corporation Page 57
RH-37 System Module Nokia Customer Care RF key component placement Figure 23: Placement of RF key components Page 58 Nokia Corporation Issue 1 07/04
RH-37 System Module Nokia Customer Care List of RF key components: Position Component Name Supplier and Description Code Z7800 Antenna Switch Module ASM 1) Hitachi Metals, M090QV 455B084* 2), 3) Murata, SPq* DA269 *q means date code which will change 4550305 1) FMD, B2CC 4511499 2), 3) Murata, 4511457 Z7802 SAW1800 RX SAFEKG84MFC0F04 Z7801 SAW1900 RX 1) Epcos, LF55F 4511503 2), 3) Murata, 4511459 SAFEJ1G96KB0F04 N7500 RF ASIC (Helgo 8.
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Nokia Customer Care RH-37 Series Transceivers Appendix 7A: Differentiation between RH-37 and RH-49 Issue 1 07/04 Nokia Corporation
RH-37 Appendix 7A Nokia Customer Care Differentiation between 900 MHz and 850 MHz (US) version (RH-37 vs. RH-49) In order to serve all markets, also an US version with 850 MHz frequency support has been implemented. There are only a few, but very important differences between these versions. Antenna radiator (I039) and deco foil (I041) The antenna radiator has been adjusted for optimum performance for a particular frequency.
RH-37 Appendix 7A Nokia Customer Care Please see the placement below: Issue 1 07/04 Nokia Corporation Page 63
RH-37 Appendix 7A Nokia Customer Care Since there are also different hardware versions for these phones, following differences are applicable: Picture (EU/ APAC version) Version 900 MHz (EU, APAC, China, LTA) RH-37 850 MHz (US) RH-49 C7511 PDM: 2320514 Value: 1p2 PDM: 2320516 Value: 1p5 TX PDM: 4511443 Supplier: Murata Type: SAFEK897MFM0F04 Marking: M9 PDM: 4511445 Supplier: Murata Type: SAFEK836MFL0F04 Marking: B4 PDM: 4511455 Supplier: Murata Type: SAFEK942MFL0F04 Marking: MQ PDM: 4511449 Sup
RH-37 Appendix 7A Nokia Customer Care MCU-SW There is no difference in the MCU-SW. The SW supports basically all bands. The definition if the phone is a 850 or a 900 MHz phone is done in production and decides if the phone is a 850 or 900 MHz phone during boot up. MCU flashing will not influence this setting in the flash and therefore will not have any influence on this. PP Flags (variant specific settings) are set in production as well (label place).
RH-37 Appendix 7A Nokia Customer Care Flash exchange When the flash is to be exchanged, the following steps need to be done: 1 Flash the phone with proper MCU-SW. For flashing with JIG: The power supply must be connected to the Prommer Box (FPS-8) For the first flashing procedure of a flash device, it is necessary to separate the capacitor on the backside of the JIG (by removing one jumper named capacitor). Please see the picture below.
RH-37 Appendix 7A Nokia Customer Care Use the menu ‘Tuning’ ‡ ‘Band Information’ and choose the proper band, then press ‘Write’ Tuning and testing Perform the Auto-Tuning procedure as usual. RxChannelSelectFilterCalibration will be done properly without any error message even if the wrong band information was entered. When performing RxCalibration and during the lowest band (850 or 900 MHz) tuning procedure, an error message appears (Afc-u.Agc- values) if the wrong band information was entered.
RH-37 Appendix 7A Nokia Customer Care When performing manual RxCalibration and during the lowest band (850 or 900 MHz) tuning procedure, an error message appears (Afc-u.Agc- values) if the wrong band information was entered.
RH-37 Appendix 7A Nokia Customer Care Power Amplifier / Antenna Switch Exchange When one of these components needs to be exchanged, a similar component (the same vendor and code) needs to be used for replacement.
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