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Nokia Customer Care
3155/3155i (RM-41), 3152 (RM-61)
Mobile Terminal
Baseband Description and
Troubleshooting
©2005 Nokia Corporation
ISSUE 1 07/2005
Company Confidential

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Table of Contents

   Also See for Nokia 3155i

   Summary of Contents for Nokia 3155i

  • Page 1 Nokia Customer Care 3155/3155i (RM-41), 3152 (RM-61) Mobile Terminal Baseband Description and Troubleshooting ©2005 Nokia Corporation ISSUE 1 07/2005 Company Confidential...
  • Page 2: Table Of Contents

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Contents Page Introduction ..............................5 Power Up Sequence ............................ 6 Flash Programming ............................7 Flashing Tool ..............................7 Flashing Troubleshooting .......................... 8 Flashing Phoenix Interface........................10 Audio ................................11 How the Audio Works ..........................11 Audio Troubleshooting ..........................12...
  • Page 3 3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting No LCD Display ............................40 Phoenix Tools ..............................41 Reference ............................... 47 Signal references ............................47 Main PWB Overview ..........................48 Test point map - bottom ........................48 Test point map - top ..........................49 ©2005 Nokia Corporation...
  • Page 4 3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting This page intentionally left blank. ©2005 Nokia Corporation Page 4 Company Confidential ISSUE 1 07/2005...
  • Page 5: Introduction

    The BL-6C Li-ion battery is used as the main power source and has a nominal capacity of 1070 mAh. Even though the Bluetooth, Camera, Camera flash, External Display and MMC components are on the ASICs, they are not used in the 3155/3155i/3152 baseband module. ©2005 Nokia Corporation...
  • Page 6: Power Up Sequence

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Power Up Sequence When the mobile terminal is dead or jammed always check the Power Up Sequence of the baseband area. Verify all regulator and reset signals are correct to ensure proper...
  • Page 7: Flash Programming

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Figure 2: Measured power-on sequence and timing Flash Programming Flash Programming Flashing Tool Flash programming is done through the VPP, FBUSTX, FBUSRX, MBUS, and BSI signals BSI = Used to indicate to MCU that the prommer is connected and mobile terminal is in...
  • Page 8: Flashing Troubleshooting

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Figure 3 shows the DA-47 flashing tool and Module Jig MJ-57. Figure 3: DA-54 Flashing Tool and MJ-57 Module Jig Flashing Troubleshooting When troubleshooting flashing problems, first make sure the signals from the FPS-8 to the D2800 processor are functioning properly before replacing any component.
  • Page 9 3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting • When flashing or erasing the mobile terminal, monitor the MBUSRX and FBUSRX signals from the UEMEK to the D2800 processor for a signal at these points. If either signal does not appear, check the signal at the production test points. If the signal is ok, check the UEMEK.
  • Page 10: Flashing Phoenix Interface

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Flashing Phoenix Interface Run EZ Flash in Phoenix to flash the mobile terminal. Figure 5: EZ Flash in Phoenix Figure 6: EZ Flash in Phoenix ©2005 Nokia Corporation Page 10 Company Confidential...
  • Page 11: Audio

    • MIC3 input is used for the Universal Headset Every microphone input can have either a differential or single-ended AC connection to the UEMEK circuit. In the Nokia 3155/3155i/3152, the internal microphone (MIC1) and external microphone (MIC2) for Pop-Port™ accessory detection are both differential.
  • Page 12: Audio Troubleshooting

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Audio Troubleshooting When troubleshooting the audio, make these common checks (see Figure • Perform visual inspection of all the ASIPs and the UEMEK. • Inject 1KHz signal into MiC1 and trace it to the earpiece. Only when using IHF signal will be amplified by a factor of 8.
  • Page 13: Audio Phoenix Interface

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Audio Phoenix Interface Run Audio Test in Phoenix to check the audio functionality. MiC1 - Use the first option to route the audio from the internal microphone to the headset speaker.
  • Page 14: Fm Radio

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting FM Radio How the FM Radio Works The D2800 turns on the FM radio and sets the frequency using the CBUS serial interface as the communication channel. A high frequency FM radio signal comes in through RFIN1 Pin to the FM radio chip and gets demodulated into a low frequency signal and is sent to the UEMEK for amplification.
  • Page 15: Fm Radio Phoenix Interface

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting • If the audio signal not correct (with 800mv DC-offset), then check FM radio chip for shorts, voids, and misalignments • If the audio signal is correct (with 800mv DC-offset), then check the UEMEK for shorts, voids, and misalignments •...
  • Page 16 3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Power On check box Frequency control Mute, On/Off control Mono/Stereo control Headset/IHF control Volume control Figure 13: Phoenix FM Radio Control panel ©2005 Nokia Corporation Page 16 Company Confidential ISSUE 1 07/2005...
  • Page 17: Usb (universal Serial Bus)

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting USB (Universal Serial Bus) How the USB Interface Works When the mobile terminal is connected to a computer using a DKU-2 data cable, the computer will provide Vbus (5V) to and pull down D+ a,d D – lines. The mobile terminal will respond by pulling the D+ line high.
  • Page 18: Usb Troubleshooting

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting USB Troubleshooting First connect mobile terminal to the computer using a DKU-2 data cable. Check under device manager if the computer recognizes the mobile terminal as a USB device. If the mobile terminal is recognized, there is no hardware fault and you can stop troubleshooting.
  • Page 19 3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Figure 17: USB Vout ©2005 Nokia Corporation ISSUE 1 07/2005 Company Confidential Page 19...
  • Page 20: Display

    Display How the Display Works Nokia 3155/3155i/3152 has a large main display (160 x 130 color depth), controlled by the D2800 engine through a parallel interface. The secondary, black and white display (96 x 68) is controlled by the D2800 engine through a serial interface. The UEMEK powers using VIO and VFlash1.
  • Page 21: Display Backlight Troubleshooting

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Secondary display connection V Flash 1 DIFF_ DA3 LCD_CSX DIF_WRX LCD_CLK DIF_RDX LCD_ DA DIF_CLK Main display connection Figure 19: Display Chips and Frequency Display Backlight Troubleshooting When troubleshooting the display backlight, make these common checks (see...
  • Page 22 3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting • Check Klight is enabled high (~4V) for main LCD and keypad LEDs. If not correct, check UEMEK. • Check Vbat(~4V) and Vin(~4V) are present on driver inputs. If not, check power supply connection.
  • Page 23: Display Phoenix Interface

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Display Phoenix Interface Run the Display Test and Display Tune in Phoenix to check the display. Figure 21: Phoenix Display Test option ©2005 Nokia Corporation ISSUE 1 07/2005 Company Confidential...
  • Page 24: Keypad Backlight

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Keypad Backlight How the Keypad Backlight Works Klight coming out of UEMEK controls the keypad backlight LEDs. Klight enables the LED driver, which is a constant voltage supply for all the keypad LED in series. The current is set for all the branches by Rset which in this case is 33k Ohms and equates to 10mA through each LED.
  • Page 25 3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Rset (33 Ohms) Vout (~12V) Klight (~Vbat) Keypad LEDs Klight LED Driver Enable Vbats Rest for keypad LEDs Figure 23: Keypad Backlight Chip and Diagram ©2005 Nokia Corporation ISSUE 1 07/2005...
  • Page 26: Keypad Backlight Display Phoenix Interface

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Keypad Backlight Display Phoenix Interface Run the Display Test in Phoenix to check the keypad backlight. Turn on Dlight Turn on Klight Figure 24: Phoenix Display Test option ©2005 Nokia Corporation Page 26...
  • Page 27: Gps

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting How GPS Works This is for emergency 911 GPS service only. When you dial 911, the GPS turns on by using Vcore_Lin and VIO from UEMEK. GPS communicates with the D2800 using the UART interface.
  • Page 28 3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting • Run Test Mode 1 on Phoenix • Check USART activity Figure 26: GPS Power VCore or VIO ©2005 Nokia Corporation Page 28 Company Confidential ISSUE 1 07/2005...
  • Page 29 3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting RF GPS Chip GPS_CLK VIO (1.8V) GPS Antenna VREF_GPS VCore (1.57V) BB GPS Chip GPS_RF_CLK GPS_UI_TX GPS_UI_RX GPS_INT_UI_CLK GPS_UI_DATA- RDY_TP GPS_Sleep_Clk GPS_Sleepx GPS_EN_RESET Figure 27: GPS Chip ©2005 Nokia Corporation...
  • Page 30: Gps Phoenix Interface

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting GPS Phoenix Interface Run the GPS Quick Test in Phoenix to check the GPS BB. CW test will fail unless CW tone is injected in GPS RF connector Figure 28: Phoenix GPS Testing option ©2005 Nokia Corporation...
  • Page 31: Uim Card

    UIM Card How the UIM Card Works The Nokia 3155/3155i/3152 supports two types of UIM cards that work at 1.8V and 3.0V. When the mobile terminal is switched on with a UIM card, the D2800 sends a 1.8V signal to the UIM card and waits for the UIM card’s response and identification. After a wait period, if there is no answer from the UIM card, the mobile terminal will send another signal at 1.8V.
  • Page 32 3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Figure 30: Vsim check • Check detection sequence SIMRSTX SIM_CLK SIM_CLK VSIM SIM_IOX Figure 31: Detection sequence ©2005 Nokia Corporation Page 32 Company Confidential ISSUE 1 07/2005...
  • Page 33 3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting • Verify communication signals Figure 32: Commuication signals • If no signals are present: (1) check contacts on Sim connector are correct, (2) check ESD chips are correct, and (3) check the UEMEK is correct. Replace damaged parts if necessary.
  • Page 34: Uim Card Phoenix Interface

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting UIM Card Phoenix Interface Run the SIM-Lock Status in Phoenix to test a SIM (or UIM) card. Figure 34: Phoenix SIM Testing options ©2005 Nokia Corporation Page 34 Company Confidential ISSUE 1 07/2005...
  • Page 35: System Connector

    Baseband Description and Troubleshooting System Connector Figure 35 provides a mapping for the system connetor. The 3155/3155i/3152 supports Pop-Port™ and Universal Headset accessories, differential and single-ended, respectively. Detection of the Pop-Port™ accessories is done through the ACI signal where the Universal Headset is detected on TIKU_GenIO (4).
  • Page 36: Accessory Detection

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Accessory Detection Figure 36 displays how the mobile terminal detects accessories. Dummy accessories pull down to GND ACI Line. Smart accessories pull down ACI line with a 56K Ohm resistor allowing communication between accessory and UEMEK.
  • Page 37: Battery (lynx) Interface Circuit

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Battery (Lynx) Interface Circuit Figure 37 illustrates the battery interface circuit. The BSI voltage level for different power-up modes: • normal mode - 1.23V • for the test mode - 170MV •...
  • Page 38: Charging

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Charging When troubleshooting battery charging, make these common checks (see Figure Figure 39 Figure 40): • Does the battery bar scroll? Battery level indicator Figure 38: Battery indicator bar • Measure voltage at V2000. Is it >3VDC? Figure 39: Charging layout •...
  • Page 39: Common Problems

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Common Problems The following section has a list of common problems, along with some standard checks. No Communication During Flash • Make sure there is a good connection between flash adaptor and the mobile terminal •...
  • Page 40: No Audio

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting No Audio • Check for bad contacts or damaged earpiece • Check for bad connections at mic • Check for broken or bad solder joint of passive components • Verify the audio signal paths using BaseBand “audio test” component with...
  • Page 41: Phoenix Tools

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Phoenix Tools Baseband menu items in Phoenix Guide. Figure 41: CDMA menu in Phoenix Figure 42: Baseband Troubleshooting menu in Phoenix Figure 43: Flashing menu in Phoenix ©2005 Nokia Corporation...
  • Page 42 3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Figure 44: Troubleshooting Factory menu in Phoenix Figure 45: ADC menu in Phoenix ©2005 Nokia Corporation Page 42 Company Confidential ISSUE 1 07/2005...
  • Page 43 3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Figure 46: EM Calibration menu in Phoenix Figure 47: General IO and GPIO menu in Phoenix ©2005 Nokia Corporation ISSUE 1 07/2005 Company Confidential Page 43...
  • Page 44 3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Figure 48: Keyboard Test menu in Phoenix ©2005 Nokia Corporation Page 44 Company Confidential ISSUE 1 07/2005...
  • Page 45 3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Figure 49: Phone Information menu in Phoenix Figure 50: Phone Control menu in Phoenix ©2005 Nokia Corporation ISSUE 1 07/2005 Company Confidential Page 45...
  • Page 46 3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Figure 51: Regulator Control menu in Phoenix Figure 52: Self-test menu in Phoenix ©2005 Nokia Corporation Page 46 Company Confidential ISSUE 1 07/2005...
  • Page 47: Reference

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Reference Signal references RFconv Clock 19.2 MHz System Clock 19.2 MHz D BOS Interface C BOS Interface Digital Sleep Clock 32 KHz Analog Sleep Clock 32 KHz Figure 53: Signal References ©2005 Nokia Corporation...
  • Page 48: Main Pwb Overview

    3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Nokia Customer Care Main PWB Overview Test point map - bottom VANA VR6 VR2 VCORE VR1A VR1B VFLASH2 VFLASH1 UEMEK 32 KHz Crystal Memory Flash 256 Meg SIM DATA SIM RESET VSIM...
  • Page 49: Test Point Map - Top

    3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Baseband Description and Troubleshooting Test point map - top Voltage Setting PURX Resistors Klight FM Radio LED Driver Vout FM-ANT Sleep-CLK Status LED Keypad LEDs Figure 55: test points - top ©2005 Nokia Corporation...
  • Page 50 3155/3155i (RM-41), 3152 (RM-61) Baseband Description and Troubleshooting Nokia Customer Care This page intentionally left blank. ©2005 Nokia Corporation Page 50 Company Confidential ISSUE 1 07/2005...

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