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Nokia 6088 Baseband Description And Troubleshooting

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Nokia Customer Care
6088 (RM-218)
Mobile Terminal
Baseband Description and
Troubleshooting
Issue 1 10/2006
Company Confidential
© 2006 Nokia Corporation

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Summary of Contents for Nokia 6088

  • Page 1 Nokia Customer Care 6088 (RM-218) Mobile Terminal Baseband Description and Troubleshooting Issue 1 10/2006 Company Confidential © 2006 Nokia Corporation...

  • Page 2: Table Of Contents

    Keypad ........................20 Display........................21 Camera and Flash Light LED................. 22 Universal Serial Bus (USB) ..................22 Accessories ......................24 Charging ......................24 Headset Detection ..................24 Data Access....................25 R-UIM CARD......................25 Page 2 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...
  • Page 3 Power Does Not Stay ON or the Mobile Terminal is Jammed ......32 Charger Faults .....................33 Audio Faults....................34 Display Faults ....................38 Keypad Faults ....................39 Keypad Faults ....................40 Camera Faults .....................41 Camera Faults .....................42 Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 3...

  • Page 4: Introduction

    The period of the sleep/ wake up cycle (slotted cycle) is 1.28N seconds, where N=0, 1, 2, depending on the clot cycle index. The mobile terminal supports standard Nokia 2-wire and 3 wire chargers (AC-3, AC-4, DC-4, AC-5, ACP-12, AC-1). However, the 3-wire chargers are treated as 2-wire chargers.

  • Page 5: Baseband And Rf Architecture

    6088 (RM218) Nokia Customer Care Baseband Description and Troubleshooting Baseband and RF Architecture Figure 1: Baseband and RF Block Diagram Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 5...

  • Page 6: Power Up And Reset

    After receiving one of the above signals, the PM will start to enter reset mode. The watchdog starts, and if the battery voltage is greater than its threshold, (3V), a 6ms delay starts to settle MSM. After this delay elapses, the VERG_MSMC regulator is Page 6 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...
  • Page 7 Backend IC can generate LCD_RST_N to reset LCD. Backend IC can generate CAM_RST signal to reset camera module. Figure 3 represents the PM start-up sequence from reset to power-on. Figure 3: Power-on & off sequence and timing Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 7...

  • Page 8: Power Up

    Battery voltage drops below power off threshold (Battery voltage < 3.3 V). The PM IC die temperature exceeds its “severe” over-temperature threshold. Power Consumption and Operation Modes Page 8 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...

  • Page 9: Power-Off Mode

    The PM measures the battery voltage, temperature, size, and charging current. Charger control block inside the PM controls the charging current delivered from the Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 9...

  • Page 10: Power Distribution

    Enabled only when RUIM card is used Enabled only when the system is powered on TCXO 50 mA 2.85 V (Off during sleep and power-off modes) Table 1: Baseband Regulators Page 10 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...

  • Page 11: Clock Distribution

    At this mode, most of the MSM is powered down and the TCXO is disabled. The PM includes several clock circuits (Figure 4), whose outputs are used for general housekeeping, MSM and RF functions within the mobile terminal system. Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 11...

  • Page 12: Tcxo

    When the timer expires, the output buffer is enabled. It synchronizes with the TCXO input such that the TCXO_OUT (MSM_TCXO in schematic) signal is glitch free, only valid TCXO pulses are output. Page 12 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...
  • Page 13 PM defaults to this SBI-controlled mode with the TCXO defaulted on. This assures the MSM will always have a clock available immediately at power-up even if TCXO_EN is low. TCXO waveform (19.2MHz) Figure 6: TCXO Timing at 25 Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 13...

  • Page 14: Sleep Crystal Circuit For 32.768 Khz

    MSM interrupt. Narrow pulses at the SLEEP_CLK output may occur during this switchover. The crystal oscillator dissipates little power, adjusting its bias current to the minimum required to maintain oscillation. SLEEP Clock waveform (32.768KHz) Page 14 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...

  • Page 15: Sbi Clk Interface

    A 9.6 MHz clock signal is used for DBUS, which is used by the MSM to transfer data between the PMIC and MSM6025. Figure 9: MSM to PM SBI Timing at 25 Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 15...

  • Page 16: Backend Ic And Camera Module Clocks

    This table describes the error condition during Flash memory downloading to the mobile terminal. Description Not Working Properly Packet Checksum fail ERR: CRC invalid Erase fail Unable to erase device Write fail Write unsuccessfully Figure 11: Flash Programming Error Description Page 16 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...

  • Page 17: Charging Operation

    The charger’s DC input is through the dc-jack connector. This mobile terminal supports AC-3, AC-4, DC-4, AC-5, ACP-12 and AC-1 chargers. Figure 12: Charging Circuitry Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 17...

  • Page 18: Charger Detection

    3. Check that the charger is within the charger window (voltage and current). If the charger is accepted and identified, the appropriate charging algorithm will be initiated. Figure 13: Mobile terminal DC Jack power input circuit. Figure 14: PNP Charging Control Circuit. Page 18 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...

  • Page 19: Charge Control

    MIC+ & MIC- are used for the mobile terminal's internal microphone. JACK_MIC+ & JACK_MIC- are used for headsets. The internal microphone (MIC+/-) is differential AC connection to the MSM (MIC1P/N). The headset microphone is single-ended AC connection to the MSM Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 19...

  • Page 20: Keypad

    The mobile terminal uses eight blue light-emitting diodes (LEDs) for keypad illumination. MSM GPIO42 is used to turn on/off these LEDs. MSM uses GPIO57 ~ GPIO66 (KYPD0, KYPD1, KYPD3, ~ KYPD17) to do keypad Page 20 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...

  • Page 21: Display

    The LCD module contains three serial white LEDs for LCD backlight. LEDs are driven by a booster (U220). The enable/disable of booster is controlled by BACKLIGHT_EN signal. BACKLIGHT_ADJ signal driven by MSM is to adjust luminance of LEDs. Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 21...

  • Page 22: Camera And Flash Light Led

    IC via FLASHLIGHT_EN signal. Universal Serial Bus (USB) Figure 19: USB Block Diagram The mobile terminal has a Universal Serial Bus (USB) interface for data access. The Page 22 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...
  • Page 23 “High”: When VBUS > 4.1 V, or USB_SUSPEND = HIGH “Low”: When VBUS < 3.6 V Positive USB data bus connection (analog, differential) Negative USB data bus connection (analog, differential) VBUS USB bus power Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 23...

  • Page 24: Accessories

    Headset Detection The mobile terminal supports Nokia standard 2.5mm mono headset. The headset insertion to the mobile terminal is detected through pin 5 of the headset Jack, J701. JACK_SENSE_N signal is low when headset is not inserted. It becomes high when headset is inserted.

  • Page 25: Data Access

    R-UIM CARD This mobile terminal supports R-UIM Card function. Figure 22 shows the timing of the RUIM’s serial interface. UIM_DATA UIM_CLK UIM_REST VREG_RUIM Figure 22: R-UIM Card Serial Timing Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 25...

  • Page 26: Test Points

    Main Board Top Layer Test Points TPE861:AUXOP TPE862:AUXON TPE117:KYPD13 TPE111:KYPD1 TPE22:TCXO_ON TP39:PM_INT_N TPE87:TCXO TPE110:KYPD0 TPE8622:MSM_TCXO TPE226:Reset_N TPE8621:MSM_Sleep CLK TPE222:PS_Hold TPX86:MSM_UART1_TXD TP223:VDD_MSMA TPX210:USBD- TPX161:VEXT_DC TPX211:USBD+ TPX84:Phone_ON TPX212:USB_VBUS TPE86221:JTAG_TDI TPX120:BAT_CON TPX85:MSM_UART1_RXD TPX20:VBATT_ID Page 26 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...

  • Page 27: Main Board Bottom Layer Test Points Troubleshooting

    TP68: Hst_TRAP TPE86223: JTAG_TCK TP63:Txd1 TPE86222: JTAG_TMS TPE19:UIM_DATA TPE86224: JRST_N TPE17:UIM_RESET TP75: WE_N TP81:EBI_ADDR_1 TP104: EBI_DATA_0 TPE2: MIC- TP76: LB_N TP74: UB_N TPE1: MIC+ TP69: Backend_CS TP73: OE_N TP33:RFU(CRE) Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 27...
  • Page 28 TPE119 :KYPD_17 TP66: TFT WE TPE118:KYPD_15 TP78: Batt_Therm TP95: TFT D3 TPE114: KYPD_7 TPE121: KeyLight_EN TPE18:UIM_CLK TP61: LCD D4 TP71: RAM CS N TP62:Rxd1 TP8611: 48MHz TP72: ROM CS N Page 28 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...
  • Page 29 Memory IC (U6) is underfilled and cannot be replaced. • Backend IC (U200) is underfilled and cannot be replaced. • The Shielding Case Assy cannot be reused after removal. • After using the heatgun, replace the domesheet. Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 29...

  • Page 30: Mobile Terminal Is Dead

    (TP72). Is it toggling defective, phone can after RESET_N goes not be repaired and high? must be replaced. MSM6025 is defective, phone cannot be repaired and must be replaced. Page 30 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...

  • Page 31: Flash Memory Faults

    (TP75). Are they not be repaired and toggling during must be replaced. programming? Memory IC is defective, phone can not be repaired and must be replaced. Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 31...

  • Page 32: Power Does Not Stay On Or The Mobile Terminal Is Jammed

    Reheat solder joints Measure RESET_N. or change PM6610 Is it high (2.8V)? MSM6025 is defective, phone can not be repaired and must be replaced. Page 32 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...

  • Page 33: Charger Faults

    Measure voltage Reheat solder joints/ Check R851. between pin#1 and pin#3 change R851 Is it OK? of Q400. Is it >0.7V Reheat solder joints or Change Q400 change PM 6610 Issue 1 10/2006 © 2006 Nokia Corporation Company Confide ntial Page...

  • Page 34: Audio Faults

    MSM6025 on RECEIVER+ and can not be repaired RECEIVER- ? and must be replaced. Check/ change R511, R512, Change the Audio C506,C507,C508,D183 and Receiver Faults D184. is itOK? Page 2 Page 34 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...
  • Page 35 Is the signal going to the MSM6025 OK, MSM6025 is between MIC+ and MIC- at C713? defective, phone can not be repaired and must be replaced. Retest Audio Faults Page 3 Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 35...
  • Page 36 AUXON and AUXOP . Is the repaired and must be signal OK? replaced. Check/ change R175, R176, R177 and R178. Check VPH_PWR. Are the signals OK? Audio Replace U100 and retest. Faults Page 4 Page 36 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...
  • Page 37 CR01 ,C221 and working? Measure the PM 6610 signal retest C25. Are they on pin 2 on the vibrator. Is the signal OK? Change PM 6610 Change the vibrator Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 37...

  • Page 38: Display Faults

    Replace U220 and switch between 0V and retest. VPH_PWR? Check U220_pin3 < Check R7041, Display 0.263 V. Is it okay? R7042 and C6241. Faults 2 Replace U220 and retest Page 38 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...
  • Page 39 Replace LCD Module Check LCD signals: LCD_MAIN_CS_N, LCD_RS, LCD_WE, LCD_OE, and Backend IC is LCD_RST_N. Are the signals defective. Replace okay? LCD Module Replace LCD Module Display Faults 3 Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 39...

  • Page 40: Keypad Faults

    Is the power Change PM6610 (2.8V). key working? Is it high? Measure voltage at PHONE_ON when Retest power key is pressed. Is it Low? Keypad Replace Faults Keymat Page 2 Page 40 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...
  • Page 41 MSM6025 and keypad and must be replaced. on every inner dome Otherwise, remove the Key. Are they about short. MSM6025 is defective, phone cab not be repaired and must be replaced Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 41...

  • Page 42: Camera Faults

    Is it okay? And check Check signals CAM_RST, Backend IC is CAM_PWDN, defective. Replace CAM_XCLK, LCD Module CAM_SDATA and CAM_SCK. Are the signals okay? Replace camera module and retest. Page 42 © 2006 Nokia Corporation Company Confidential Issue 1 10/2006...

This manual is also suitable for:

Rm-218