Nokia Customer Care 2118 (RH-77) Mobile Terminal Baseband Description and Troubleshooting Issue 01 04/2005 Company Confidential ©2005 Nokia Corporation
118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Contents Page Introduction ..................................................................................................................................................... 3 Baseband and RF Architecture.................................................................................................................... 4 Power Up and Reset .........................................................................................
Nokia Customer Care 2118 (RH-77) Baseband Description and Troubleshooting Introduction The baseband module is a CDMA single-band engine based on the DCT4 architecture and consists of three ASICs: Universal Energy Management cost effective (UEMC), Universal Phone Processor (UPP8M4.2), and a 64 megabit FLASH. The baseband architecture supports a power-saving function called sleep mode. Sleep mode shuts off the VCTCXO, which is used as the system clock source for both the RF and the baseband.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Baseband and RF Architecture VBatt PRODTP VPP Battery Audio Flash SIM Reader DC/DC GenIO Control Charger Bottom Conn. MBus ExtBus C JTAG UPP VIO UEMC VANA FBusRx FBusT x VR1A V SIM VR1B Vflash1 VR2 Vflash2 VR3 Dlight VR4 Sleep Clk 32 KHz CBus Core DBus MBus Klight FBus VR5 VR6 VR7 Flashlight V Bat VCTCXO 19.
Nokia Customer Care 2118 (RH-77) Baseband Description and Troubleshooting Power Up and Reset Power up and reset are controlled by the UEMC ASIC.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Figure 2: Power-on sequence and timing Page 6 ©2005 Nokia Corporation Company Confidential Issue 01 04/2005
Nokia Customer Care 2118 (RH-77) Baseband Description and Troubleshooting Figure 3: Measured power-on sequence and timing Power Up - Power Key When the power key is pressed, the UEMC enters the power-up sequence. Pressing the power key causes the PWRONX pin on the UEMC to be grounded. The UEMC PWRONX signal is not part of the keypad matrix. The power key is only connected to the UEMC. This means that when pressing the power key an interrupt is generated to the UPP that starts the MCU.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care VCHAR input to rise above the charger detection threshold (VCHDET+) and by detection, start-up charging is initiated. The UEMC generates 100 mA constant output current from the connected charger’s output voltage. The battery’s voltage rises at it charges, and when the VBAT voltage level is detected to be higher than master reset threshold limit (VMSTR+), the START_UP charge is terminated.
Nokia Customer Care 2118 (RH-77) Baseband Description and Troubleshooting In ACTIVE mode, the mobile terminal is in normal operation, scanning for channels, listening to a base station, transmitting and processing information. There are several sub-states in the active mode depending on the mobile terminal present state of the mobile terminal, such as burst reception, burst transmission, if the DSP is working, etc.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care The 2118 baseband is powered from five different UEMC regulators (see Table 1). Table 1: Baseband Regulators Regulator Maximum Current (mA) Vout (V) Notes VCORE 300 1.35/1.05 Power up default 1.35 V and 1.05 V in Sleep Mode. 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.
Nokia Customer Care 2118 (RH-77) Baseband Description and Troubleshooting Clock Distribution RFClk (19.2 MHz Analog) The main clock signal for the baseband is generated from the voltage and temperature controlled crystal oscillator VCTCXO (G500). This 19.2 MHz clock signal is generated at the RF and is fed to N700 pin 18 (TCXO_IN). N700 then converts the analog sine waveform to a digital waveform with a swing voltage of 0 tot 1.8 V and sends it to the UPP from pin 16 at N700 (19.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Figure 5 shows the RFCLK signal for the UPP. Figure 5: Waveform of the 19.
Nokia Customer Care 2118 (RH-77) Baseband Description and Troubleshooting RFConvClk (19.2 MHz digital) The UPP distributes the 19.2 MHz internal clock to the DSP and MCU, where the software multiplies this clock by seven for the DSP and by two for the MCU.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care CBUS Clk Interface A 1.2 MHz clock signal is used for CBUS, which is used by the MCU to transfer data between the UEMC and UPP. Figure 7: CBUS data transfer DBUS Clk Interface A 9.6 MHz clock signal is used for DBUS, which is used by the DSP to transfer data between the UEMC and UPP.
Nokia Customer Care 2118 (RH-77) Baseband Description and Troubleshooting SleepCLK (Digital) The UEMC provides a 32 kHz sleep clock for internal use and to the UPP, where it is used for sleep mode timing. Figure 9: 32 kHz Digital output from UEMC SleepCLK (Analog) When the system enters sleep mode or power off mode, the external 32 KHz crystal provides a reference to the UEMC RTC circuit to turn on the mobile terminal during power off or sleep mode.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Flash Programming Error Codes The following characteristics apply to the information in Table 3. • Error codes can be seen from the test results or from Phoenix's flash-tool. • Underlined information means that the connection under consideration is being used for the first time. Table 3: Flash Programming Error Codes Error Description Not Working Properly C101 "The Phone does not set FbusTx line high after the startup.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Table 3: Flash Programming Error Codes (Continued) Error Description Not Working Properly A204 "The flash manufacturer and device IDs in the existing algorithm files do not match with the IDs received from the target phone." Cx83 "The Prommer has not received phone acknowledge to the message.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Charging Operation Battery The 2118 uses a Lithium-Ion cell battery with a capacity of 850 mAh. Reading a resistor inside the battery pack on the BSI line indicates the battery size. The mobile terminal measures the approximate temperature of the battery on the BTEMP line with an NTC resistor on the PCB. The temperature and capacity information are needed for charge control.
Nokia Customer Care 2118 (RH-77) Baseband Description and Troubleshooting UEMC VCHAR VCHAR in VBATT VCHAR out Battery Vmstr Switch driver Over temperature detection Control logic Current sensing/limit VBATT Watchdog + Comp PWM generator PWM VBATT lim Figure 12: Charging circuitry Charger Detection Connecting a charger creates voltage on the VCHAR input of the UEMC. Charging starts when the UEMC detects the VCHAR input voltage level above 2 V (VCHdet+ threshold).
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care If the charger is accepted and identified, the appropriate charging algorithm is initiated. X102 F100 2 L100 ________ "VCHARIN" 42R/100MHz C106 1.5A V100 1 0 2 1n0 CHARGER(4:0) Figure 13: Charging circuit Charge Control In active mode, charging is controlled by the UEMC’s digital part. Charging voltage and current monitoring is used to limit charging into safe area.
Nokia Customer Care 2118 (RH-77) Baseband Description and Troubleshooting microphone signals are differential types. Also, MICBIAS1 is used for MIC1 and MICBIAS2 is used for MIC2. The 2118 also supports a hands-free speaker (B301), which is driven by an IHF audio amplifier (N150). Display and Keyboard The 2118 uses LEDs for LCD and keypad illumination. There is one LED for the LCD and four LEDs for the keypad. KLIGHT is the signal used to drive the LED driver for the LCD and keyboard.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Accessories The 2118 supports Pop-port and Universal Headset accessories, differential and singleended, respectively. Detection of the Pop-port accessories is done through the ACI signal where the Universal Headset is detected on GenIO (12).
Nokia Customer Care 2118 (RH-77) Baseband Description and Troubleshooting Charging Charging through Pop-port is accomplished in the same manner as through the charger connector. Pin 1 of the Pop-port is physically connected to the charger connector. When the mobile terminal is connected to a desktop charger (e.g., DCV-15), it charges in the same manner as it does with the charger connector. Figure 17 shows the actual charging sequence.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Pop-port Headset Detection Accessory detection on the Pop-port is done digitally.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Figure 19: Waveform showing Pop-port FBus communication Accessory Detection Through ACI USB and Audio on (mono or stereo)/FM radio communication in Pop-port is done through the following signals: Table 4: Accessory Detection Signals USB Audio/FM Pin 5 (USB Vbus) Pin 9 (XMic N) Pin 6 (USB +) Pin 10 (SMIC P) Pin 7 (USB -) Pin 11 (HSEAR N) Pin 8 (Data GND) Pin 12 (HSEAR P) Pin 13 (HSEAR R N) Pin 14 (HSEAR R P) Issue 01 04/2
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Figure 20: Waveform showing accessory detection through ACI SIM CAR The 2118 supports SIM CAR. Use the waveform in Figure 21 to verify that the sim_vcc, sim_i/o, cim_clk, and sim_rst signals are activated in the correct sequence at power up. This picture may be taken when the SIM CAR is installed on the mobile terminal to measure the signals when the mobile terminal is turned on.
Nokia Customer Care 2118 (RH-77) Baseband Description and Troubleshooting Figure 21: RUIM signal waveform Issue 01 04/2005 ©2005 Nokia Corporation Company Confidential Page 27
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Test Points Page 28 ©2005 Nokia Corporation Company Confidential Issue 01 04/2005
2118 (RH-77) Nokia Customer Care Baseband Description and Troubleshooting Figure 22: Test points (bottom) Figure 23: BB test points (top) Issue 01 04/2005 ©2005 Nokia Corporation Company Confidential Page 29
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Troubleshooting The following hints should help finding the cause of the problem when the circuitry seems to be faulty.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Mobile Terminal is Dead Mobile terminal is dead Current is zero or too high? ¾ If current is zero, check the battery connector to make sure Vbat makes contact. ¾ If current is too high, check for shorts. ¾ Make sure all BB regulators are at their respective voltage levels (VANA, VIO, VCORE, VFlash1, and VR3). See phone's top view diagram for test points. ¾ Make sure the system Clk is 19.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Flash Programming Does Not Work Flash faults Does the mobile terminal set Flashbus TXD line high after the startup? YES Measure BSI pulse during Flash programming. Is it OK? NO Check BSI line X103, R202, R206, C100, C111, C240 YES Measure FBusRX (2.78V) signal during flash programming from production pattern.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Flash faults, page 2 Can you read the manufacturer ID and the device ID? NO Reflow or change Flash YES Is the mobile terminal dead? YES Mobile terminal is dead YES Mobile terminal is jammed NO Does the mobile terminal start up or appear jammed? NO Retest Issue 01 04/2005 ©2005 Nokia Corporation Company Confidential Page 33
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Power Does Not Stay on or the Mobile Terminal is Jammed Mobile terminal is jammed Check VBATT, VIO, VCORE, VFlash1, VANA, VR3 capacitors. Are they OK? NO Measure VIO, VCORE, VFlash1, VANA, and VR3 voltages. Are they OK? YES Check BSI/BTEMP lines and VBATT lines. If OK, reflow or change UEM Repair NO YES Measure 32kHz Sleep Clk from testpoint. Is it OK? Measure the 32kHz Clk crystal.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Mobile terminal is jammed, page 2 Is the ESN present? Rebuild the ESN NO YES YES Does the mobile terminal shut down after 32 seconds? Has the mobile terminal been fully erased and reflashed for this problem? NO YES Measure DBusEN interface signal at test point J413. Is it OK? Measure watchdog signal at CBusEN interface at test point J406. Is it OK? Reflow or change UPP. YES Read the mobile terminal info.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Charger Charger faults Connect Charger. Make sure battery is connected. Battery bar doesn't work (scroll) NO Retest NO Check DC jack, F100, L100, V100, C106 NO Check NTC. Is it OK? YES Measure voltage over V100. Is it >3.0 Vdc? YES Read BTEMP value. Is it ~25C (0319)? YES NO Replace NTC YES Remove (fuse) F100 and measure current.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Audio Faults Audio faults Is the earpiece working? NO Change earpiece. Is it working now? Retest YES NO YES Set mobile terminal in Local Mode. Use Phoenix Troubleshooting > Phone Control > Phone State Tab > select Local Mode > click Execute. Then use Audio Test > HP microphone in/HP speaker out > Loop ON to enable the earpiece. Inject a 1KHz sine signal 200mVp-p on XMIC.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Audio faults, page 2 Is the microphone working? NO Change the microphone. Is it working now? YES Retest NO Set the mobile terminal in Local Mode. Use Phoenix Troubleshooting > Phone Control > Phone State Tab > Select Local Mode > Execute. Then use Audio Test > HP microphone in/HP speaker out > Loop On to enable earpiece. Talk through the microphone. YES Measure MICB1 voltage from MICP pads. Is it ~2.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Audio faults, page 3 Is internal handsfree speaker (IHF) working? NO Select a ring tone and measure signals at L150 and L151. Is signal OK? YES Change B301 NO Change UPP NO Measure GenIO28. Is it OK (1.8V)? YES YES Set the mobile terminal in Local Mode. Use Phoenix Troubleshooting > Phone Control > Phone State Tab > select Local Mode > Execute. Then use Audio test > HP microphone in/Ext Speaker out > Loop ON.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Audio faults, page 4 Is Vibra working? NO Measure VBATT voltage pin 1 of M300. Is it OK? NO Check VBATT line YES Use UI Menu > Profile > Normal > Customize > Vibrating Alert > Select On > then go back to Customize menu > Ringing Tone > Try any ring tone and vibra should work. YES Measure the UEM signal on pin 2 of M300.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Display Faults Display faults Are the keyboard LEDs turned on when the mobile terminal is turned on or when making a call? NO Measure VBATT voltage at L301. Is it okay? YES Check VBATT line and C303, C316, and L300. NO Change UEM NO Measure the driver signal from UEM at J336. Is the signal okay? YES YES Check N302 driver signal at C304. If not OK, change N302.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Display faults, page 2 Does the Display start? NO Try changing display module. Does it work? YES Retest Measure VIO and Flash1. NO Change UEM Check LCD signals LCDCSX (pin5), LCDCLK (pin4), LCDSDA (pin3), and LCDRESX (pin2) at X302.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Keypad Faults Keypad faults Is the power key working? NO Measure voltage at S302. Is it high? Check S302, C310, and R306. If OK, change UEM NO YES Measure voltage at S300 when power key is pressed. Is it high? YES Check S302.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Keypad faults, page 2 Are the UI modules keys working? NO Change keypads module. Is it working? Retest YES NO YES Measure ROW0-5 (P10-P15) signals between UPP and keypad at J325, J320, J321, J322, J323. Are they ~1.8V? NO Make sure there are no shorts on Z300. If OK, change UPP NO Make sure there are no shorts on Z300.
2118 (RH-77) Baseband Description and Troubleshooting Nokia Customer Care Flashlight Flashlight faults Are the flashlight LEDs turned on when the mobile terminal is turned on and when pressing the UP key? NO Measure VBATT voltage at R303. Is it OK? NO Check VBATT line at the battery connector NO Change the UEM YES YES Measure the driver signal DLIGHT at D301 J336, and Q301. Is the signal OK? YES Check N302, L301, L300, C316, C304, R300, R302, R304, R2310.
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