Nokia Customer Care 2115i/2116/2116i (RH-66) Mobile Terminals Baseband Description and Troubleshooting Issue 1 03/2005 Company Confidential ©2005 Nokia Corporation
115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Contents Page Introduction ..................................................................................................................................................... 5 Baseband and RF Architecture ................................................................................................................ 6 Power Up and Reset .....................................................................................................
Nokia Customer Care 2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Flashlight Faults .........................................................................................................................................51 GPS Faults ....................................................................................................................................................
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Nokia Customer Care 2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Introduction The mobile terminal uses a CDMA tri-mode engine (AMPS/800/1900) with a DCT4 baseband consisting of three ASICs: • Universal Energy Management cost reduction (UEMC) • Universal Phone Processor (UPP) - UPP8Mv4.2 • 8MB flash memory with 1 MB of RAM memory The baseband architecture supports a power-saving function called sleep mode.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Baseband and RF Architecture VBatt PRODTP VPP Battery Audio Flash SIM Reader DC/DC GenIO Control Charger Bottom Conn. MBus UEMC ExtBus C JTAG UPP VIO 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 2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Power Up and Reset The UEMC ASIC controls the power up and reset.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Figure 2: Power-on sequence and timing Page 8 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Nokia Customer Care 2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Figure 3: Measured power-on sequence and timing Power Up The mobile terminal can power up using the power key, a charger, or an RTC alarm. 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 ground. The UEMC PWRONX signal is not part of the keypad matrix. The power key is only connected to the UEMC.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Charging is controlled by START_UP charge circuitry when it detects the VBAT level to be below the master reset threshold (VMSTR-). Connecting a charger forces the VCHAR input to rise above the charger detection threshold (VCHDET+), and by detection start-up charging initiates. The UEMC generates 100 mA of constant output current from the connected charger’s output voltage.
Nokia Customer Care 2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Sleep mode is exited either by the expiration of a sleep clock counter in the UEMC or by some external interrupt (generated by a charger connection, key press, headset connection, etc.). The VCTCXO is shut down in sleep mode and the 32 kHz sleep clock oscillator is used as a reference clock for the baseband.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting The heart of the power distribution is the power control block inside the UEMC. It includes all the voltage regulators and feeds the power to the entire system. The UEMC handles hardware power-up functions so the regulators are not powered and the power up reset (PURX) is not released if the battery voltage is less than 3 V.
Nokia Customer Care 2115i/2116/2116i (RH-66) 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) and sent to the UPP at pin M5. Figure 4: Waveform of the 19.
2115i/2116/2116i (RH-66) 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.
Nokia Customer Care 2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting 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 the UPP. Figure 6: 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.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting SleepCLK (Digital) The 32 kHz sleep clock in the UEMC is also used in the UPP for sleep mode timing. Figure 8: 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.
Nokia Customer Care 2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting 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.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting 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.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Charging Operation Battery The 2115i/2116/2116i uses a Lithium-Ion cell battery with a capacity of 1070 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.
2115i/2116/2116i (RH-66) 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 11: 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).
15i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care If the charger is accepted and identified, the appropriate charging algorithm is initiated. Figure 12: Charging circuit Charge Control In active mode, charging is controlled by the UEMC’s digital part. Charging voltage and current monitoring are used to limit charging into a safe area. The UEMC has the following programmable charge cut-off limits: • VBATLim1 = 3.6 V (Default) • VBATLim2L = 5.0 V • VBATLim2H = 5.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting UEMC. Inputs for the microphone signals are differential types. Also, MICBIAS1 is used for MIC1 and MICBIAS2 is used for MIC2. The 2115i/2116/2116i also support a hands-free speaker, which is driven by an IHF audio amplifier. Display and Keyboard The mobile terminal uses light-emitting diodes (LEDs) for liquid crystal display (LCD) and keypad illumination. There is one LED for the LCD and four LEDs for the keypad.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Accessories The 2115i/2116/2116i supports Pop-port accessories. Detection of the accessories is done through the ACI signal.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Figure 16 shows the actual charging sequence. The channels shown are: • CH1 = Charging current across the .22 Ohm (R2200) resistor on UEMK • CH2 = Charger voltage measure at V2000 • CH3 = Battery voltage measure at R2200 • CH4 = PURX Figure 16: Charging sequence In Channel 4, PURX is released, which shows when the mobile terminal operation goes from reset mode to power-on mode.
Nokia Customer Care 2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Pop-port Headset Detection Accessory detection on the Pop-port is done digitally.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting FBUS Detection FBUS communication in Pop-port is done through the following lines: • Pin 2 (Charge GND) • Pin 3 (ACI) • Pin 4 (Vout) • Pin 6 (FBUS Rx) • Pin 7 (FBUS Tx) Figure 18: 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 Page 26 USB Audio/FM Pin 5 (U
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Table 4: Accessory Detection Signals (Continued) USB Audio/FM Pin 13 (HSEAR R N) Pin 14 (HSEAR R P) Figure 19: Waveform showing accessory detection through ACI Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 27
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting SIM CAR The 2115i/2116/2116i supports SIM CAR. Use the waveform in Figure 20 to verify that the sim_vcc, sim_i/o, cim_clk, and sim_rst signals are activated in the correct sequence at power up. The figure shows the proper waveforms when the interface is working. See Figure 23 on page 32 for the test point’s location.
Nokia Customer Care 2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting GPS Module The GPS circuitry utilizes RF signals from satellites stationed in geosynchronous orbit to determine longitude and latitude of the mobile terminal. The GPS circuitry is completely separate of the CE circuitry and is located almost exclusively on the secondary side of the PWB underneath the display module. (See Figure 21 on page 30.) Use the following steps for basic GPS BB troubleshooting: 1.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care AGC LNA A/D GPS DATA Baseband Core RF-BB I/F (1.87V) GPS Clock PLL ARM Oscillator TI RF ASIC RF Control I/F SPI Interface RF Control I/F (1.8V) RAM VBATT VRF 2.8V RTC CAL VBATT GND TCXO CAL GND GPS ENGINE VIO VCORE SleepX USART 32KHz RTC ResetX Secondary UART (Diagnostic) Timestamp System Clock (19.2MHz CDMA) 1.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Test Points - Bottom Vbat vibra Vibra VIO MIC1N MIC1P Audio amplifier 32KHz crystal Figure 22: Test points (bottom 1) Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 31
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting LED driver VCORE VCORE driver VBAT in to DC/DC 19.
Nokia Customer Care 2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting VBAT BSI GND Power on switch IHFP POWERONX IHFN Figure 24: BB test points (bottom 3) Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 33
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Test Points - Top Torch light LED EARR Display connector GND BSI VBATT EARN Figure 25: BB test points (top 1) Page 34 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Keypad LED RF convolution CBUS_EN UEMINT clock SLEEP_X DBUS_EN SMPS_CLK FBUSTXI PURX SLEEP_CLK FBUSRXI MBUSRX MBUSTX CBUS_DA GPS_EN_RESET UEMRSTX CBUS_CLK Keypad LEDs Figure 26: BB test points (top 2) Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 35
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Troubleshooting First, carry out a through visual check of the module. Ensure in particular that: • There are no mechanical damages • Soldered joints are okay • ASIC orientations are okay The following hints should help finding the cause of the problem when the circuitry seems to be faulty.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Mobile Terminal is Dead Mobile Terminal is Dead Is the mobile terminal 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 mobile terminal’s top view diagram for test points.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Flash Faults Flash Faults Does the mobile terminal set the Flashbus TXD line high after the startup? YES Measure BSI pulse during Flash programming. Is it OK? NO Check BSI line at X2000, C2000, and C2003. YES Measure FBusRX (2.78V) signal during flash programming from production pattern.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Flash Faults Page 2 Can you read the manufacturer ID and the device ID? Re-flow or change the Flash.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Power Does Not Stay on or the Mobile Terminal is Jammed Mobile Terminal is Jammed Measure VIO, VCORE, VFlash1, VANA, and VR3 voltages. Are they OK? NO Check VBATT, VIO, VCORE, VFlash1, VANA, VR3 capacitors. Are they OK? NO Repair capacitors NO Reflow or change UEM NO Change B2200 NO Check G7200, VR3, R7200, C7200, R7205, C7207, C7204, and R7204. YES Check BSI/BTEMP lines and VBATT lines.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Mobile Terminal is Jammed Page 2 Is the ESN present? NO Rebuild the ESN NO Perform a full erase and reflash the mobile device. NO Reflow or change UPP and reflash. YES YES Has the mobile device been fully erased and reflashed for this problem? Does the mobile terminal shut down after 32 seconds? YES Measure watchdog signal at CBusEN interface at test point. Is it OK? NO Reflow or change UEM and reflash.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Charger Faults Charger Faults Connect the charger and make sure the battery is connected. Does the battery bar work (scroll)? NO Retest NO Check the DC jack, F2000, L2000, V2000, and C2004. NO Check NTC. Is it OK? YES Measure voltage over V2000. Is it >3.0 Vdc? YES Read BTEMP value. Is it ~25C? YES NO Replace NTC YES Remove (fuse) F2000 and measure current.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Audio Faults Audio Faults Is the earpiece working? NO Replace the earpiece. Is it working now? YES Retest 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 MICP.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting 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.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Audio Faults Page 3 Is the internal handsfree speaker (IHF) working? NO Select a ring tone and measure signals at L2003 and L2004. Are the signals OK? YES Change IHF 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.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Audio Faults Page 4 Is the vibra working? NO Measure VBATT voltage pin 1 on the vibra. Is it OK? NO Check VBATT line. Is it OK? NO Repair. YES 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 on the vibra.
2115i/2116/2116i (RH-66) 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 L2400. Is it okay? YES Check VBATT line and C2405, C2407, and L2401. NO Change UEM NO Change N2400 NO Replace V2400 NO Replace any bad components NO Replace any bad components NO Measure the driver signal from UEM at J2420.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Display Faults Page 2 Does the display start? NO Change the 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.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Keypad Faults Keypad Faults Is the power key working? NO Measure voltage at S2418. Is it high? NO Check C2406 and C2409. Are they OK? NO Replace any bad components. YES Change the UEM YES YES Measure voltage at S2418 when power key is pressed. Is it high? Keypad Faults Page 2 Issue 1 03/2005 YES Check S2418.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Keypad Faults Page 2 Are the UI module keys working? NO Change keypad module. Is it working? YES Retest NO Make sure there are no shorts on Z2400. If OK, change UPP. NO Make sure there are no shorts on Z2400. If OK, change UPP. NO YES Measure ROW0-4 signals between UPP and keypad at every dome key. Are they ~1.8V? YES END Measure COL 1-5 signals between UPP and keypad on every outer dome. Are they ~1.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting Nokia Customer Care Flashlight Faults Flashlight Faults Are the flashlight LEDs turned on when the mobile terminal is on and when pressing the UP key? NO Measure VBATT voltage at C2405. Is it OK? NO Check VBATT line at L2400. NO Change the UEM NO Reflow YES Measure the driver signal DLIGHT at D2400 J2420, and V2403. Is the signal OK? YES YES Check N2400, L2401, L2400, C2405, C2407, R2412, R2411, C2404, R2407, R2408.
2115i/2116/2116i (RH-66) Baseband Description and Troubleshooting GPS Faults GPS Faults Is VCORE at 1.5V? NO Troubleshoot CE power supply YES Is VIO at 1.8V? NO YES GPS_RF_CLK (19.2MHz) OK? NO Troubleshoot CE VCTCXO circuit NO If the BB ASIC is being held in reset, troubleshoot the source in the CE NO Troubleshoot CE sleep clock circuit NO VRF_GPS regulator enable line low? YES GPS_EN_RESET held high? YES GPS_SLEEPCLK (32.768KHz) OK? YES VRF_GPS OK? YES GPS_CLK (16.
