Nokia 7088 Troubleshooting Manual
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Nokia 7088 Troubleshooting Manual

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Nokia Customer Care
7088 (RM-219)
Mobile Terminal
Baseband Description and
Troubleshooting
Issue 1 12/2006
Company Confidential
© 2006 Nokia Corporation

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Summary of Contents for Nokia 7088

  • Page 1 Nokia Customer Care 7088 (RM-219) Mobile Terminal Baseband Description and Troubleshooting Issue 1 12/2006 Company Confidential © 2006 Nokia Corporation...

  • Page 2: Table Of Contents

    Keypad ........................21 Display........................21 Camera and Flash Light LED................. 22 Universal Serial Bus (USB) ..................22 Accessories ......................24 Charging ......................24 Headset Detection ..................24 Data Access....................25 UIM CARD......................25 Page 2 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...
  • Page 3 Power Does Not Stay ON or the Mobile Terminal is Jammed ......33 Charger Faults .....................34 Audio Faults....................35 Display Faults ....................39 Keypad Faults ....................40 Keypad Faults ....................41 Camera Faults .....................42 Camera Faults .....................43 Issue 1 12/2006 © 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

    7088 (Flower) Nokia Customer Care Baseband Description and Troubleshooting Baseband and RF Architecture Figure 1: Baseband and RF Block Diagram Issue 1 12/2006 © 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 allow MSM to settle. After this delay elapses, the VERG_MSMC Page 6 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...
  • 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. (PHONE_N) (RESET_N) Figure 3: Power-on & off sequence and timing Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 7...

  • Page 8: Power Up

    The MSM drives the PS_HOLD signal low responding to the pressing of the keypad power button. Battery voltage drops below power off threshold (Battery voltage < 3.3 V). The PM IC die temperature exceeds its “severe” over-temperature threshold. Page 8 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...

  • Page 9: Power Consumption And Operation Modes

    Charging mode can function in parallel with any other operating mode. A battery ID resistor inside the battery pack indicates the battery type/ size. The resistor value corresponds to a specific battery capacity. The PM measures the battery voltage, Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 9...

  • Page 10: Power Distribution

    PM6610 handles hardware power-up functions so that the regulators are not powered on and the power-up reset (PURX) is not released if the battery voltage is less than 3 V. The following PM6610 regulators power the base band: Page 10 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...

  • 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 12/2006 © 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 12/2006...
  • 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 12/2006 © 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 12/2006...

  • 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 12/2006 © 2006 Nokia Corporation Company Confidential Page 15...

  • Page 16: Backend Ic And Camera Module Clocks

    This table describes the errors 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 12/2006...

  • 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 12/2006 © 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 12/2006...

  • Page 19: Charge Control

    The baseband supports 2 microphone inputs and three receiver (earpiece)/ speaker outputs. Figure 15: Audio Sending Direction Block Diagram MIC+ & MIC- are used for the mobile terminal's internal microphone. JACK_MIC+ & Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 19...
  • Page 20 +3 dBm0 sine wave into a 32 ohm receiver (earpiece). The output power for the auxiliary (AUXO) output is typically 1.87 mW for a full-scale +3 dBm0 sine wave into a 600 OHM load. Page 20 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...

  • Page 21: Keypad

    The LCD module contains three serial white LEDs for LCD backlight. LEDs are driven by a booster (U12). The enable/disable of booster is controlled by BACKLIGHT_EN signal. BACKLIGHT_ADJ signal driven by MSM is used for adjustment of LEDs luminance. Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 21...

  • Page 22: Camera And Flash Light Led

    The mobile terminal has a Universal Serial Bus (USB) interface for data access. The USB interface supports full-speed (12 Mbps) transmission and receiving. It is compliant with the Universal Serial Bus Specification Rev. 2.0. Page 22 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...
  • 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 12/2006 © 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 by pin 2 of the headset Jack, J701. JACK_SENSE_N signal is low when headset not inserted. It becomes high when headset is inserted.

  • Page 25: Data Access

    UIM CARD This mobile terminal supports UIM Card function. Figure 22 shows the timing of the UIM’s serial interface. UIM_DATA UIM_CLK UIM_REST VREG_RUIM Figure 22: UIM Card Serial Timing Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 25...

  • Page 26: Test Points

    7088 (Flower) Base band Description and Troubleshooting Test Points Main Board Top Layer Test Points Page 26 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...

  • Page 27: Main Board Bottom Layer Test Points

    7088 (Flower) Nokia Customer Care Baseband Description and Troubleshooting Main Board Bottom Layer Test Points Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 27...

  • Page 28: Sub Board Top Layer Test Points

    7088 (Flower) Base band Description and Troubleshooting Sub Board Top Layer Test Points Page 28 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...

  • Page 29: Sub Board Bottom Layer Test Points

    7088 (Flower) Nokia Customer Care Baseband Description and Troubleshooting Sub Board Bottom Layer Test Points Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 29...

  • Page 30: Troubleshooting

    The Base band Shielding Cover Assy and RF Shielding Cover cannot be reused after removal. • After using the heat gun, the dome sheet is recommended to be replaced. Page 30 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...

  • Page 31: Mobile Terminal Is Dead

    (same as OE_N). Is it defective, phone can toggling after not be repaired and RESET_N goes high? must be replaced. MSM6025 is defective, phone can not be repaired and must be replaced. Issue 1 12/20 © 2006 Nokia Corporation Company Confidential Page 31...

  • Page 32: Flash Memory Faults

    WE_N. Are they defective, phone can toggling during not be repaired and programming? must be replaced. Memory IC is defective, phone can not be repaired and must be replaced. Page 32 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...

  • Page 33: 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. Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 33...

  • Page 34: Charger Faults

    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 Page 34 © 2006 Nokia Corporation Company Co nfidential Issue 1 12/20...

  • Page 35: Audio Faults

    RECEIVER+ and D422 . Is it OK? RECEIVER- ? Change the receiver MSM6025 is defective, phone Audio can not be repaired and must Faults be replaced. Page 2 Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 35...
  • Page 36 Is the signal going to the MSM6025 MSM6025 is between MIC+ and MIC- ? defective, phone can not be repaired and must be replaced. Retest Audio Faults Page 3 Page 36 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...
  • Page 37 SPK_N and SPK_P . Is the 11,C512. signal OK? Check/ change R173, C171, C172,C174 and C175.R175~R178. Check VPH_PWR. Are the signals Audio Faults Page 4 Replace U100 and retest. Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 37...
  • Page 38 Control Test Command Change and and C25. Are Is the vibrator Measure the VIB_DRV signal retest they OK? working? on the vibrator. Is the signal Change the vibrator Change PM 6610 Page 38 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...

  • Page 39: Display Faults

    Check U12_pin1. Does it Replace U12 and switch between 0V and retest. VPH PWR? Check BACKLIGHT_ADJ < 0.263 V. Is it OK? Check D417 Display Faults 2 Replace U12 and retest Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 39...
  • Page 40 Phone J31.Check LCD can not be repaired signals:TFT_MAIN_CS,TFT_R and must be S,TFT_WE and LCD_RST, are replaced they ok? Display Faults 3 LCD is defective. Replace LCD Module board Page 40 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...

  • Page 41: Keypad Faults

    (2.8V). Connention. If OK, Is it high? change PM6610 Measure voltage at PHONE_ON when Retest power key is pressed. Is it Low? Keypad Replace Faults Keymat Page 2 Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 41...
  • Page 42 MSM6025 and keypad on KYPD_(9,11,13,15,17)? on every inner dome Key. Are they about Check/change D352~D354(on main board), then retest. MSM6025 is defective, phone can not be repaired and must be replaced Page 42 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...

  • Page 43: Camera Faults

    Backend IC is Check signals defective. Phone CAM_RST, can not be repaired CAM_PWDN, and must be CAM_XCLK, replaced. CAM_SDATA and CAM_SCK. Are the signals OK? Replace camera module and retest. Issue 1 12/2006 © 2006 Nokia Corporation Company Confidential Page 43...
  • Page 44 7088 (Flower) Base band Description and Troubleshooting This page intentionally left blank. Page 44 © 2006 Nokia Corporation Company Confidential Issue 1 12/2006...

This manual is also suitable for:

Rm-219

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