This document provides service repair documentation for the Siemens CX75 and M75 mobile phones, focusing on Level 2.5 light repairs. It outlines procedures for diagnosing and repairing common faults related to various connectors and components within the devices.
Function Description:
The Siemens CX75 and M75 are mobile phones designed for communication and multimedia functionalities. Key features include a camera, Bluetooth connectivity, and a memory card slot (MMC/RS MMC) for expandable storage. The devices incorporate a SIM card reader for network access, an IO jack for charging and external accessories (such as loudspeakers, microphones, and headsets), and a display for user interaction. A joystick provides navigation and control. Internal components are connected via a board-to-board connector, and an RF connector manages antenna functions for network connectivity. An IRDA (Infrared Data Association) port is also present for short-range wireless communication.
Important Technical Specifications:
- Part Numbers (IMEI label):
- CX75: S30880-S7420-#xxx
- M75: S30880-S7430-#xxx (where # is any letter A-Z and xxx is any number from 100, 101, 102...)
- Soldering Temperature: Approximately 360°C TIP Temp. for most component replacements.
- E-commerce Order Numbers for Replacement Parts:
- SIM Card Reader: L36334-Z97-C337 (CONNECTOR SIM CARD READER K1)
- IO Jack: L36334-Z93-C303 (IO-JACK SLIM 12-POL)
- Board to Board Connector: L50634-Z97-C346 (CONNECTOR BOARD TO BOARD 12-POL)
- Battery Connector: L36334-Z97-C213 (CONNECTOR BATTERY 3-POL)
- MMC Connector: L50634-Z97-C415 (CONNECTOR RS MMC X75)
- RF Connector: L36334-Z93-C297 (CONNECTOR ANTENNA 6mm)
- Camera Connector: L50634-Z97-C379 (CONNECTOR CAMERA-SOCKET)
- Display Connector: L50634-Z97-C380 (CONNECTOR DISPLAY 20POL)
- IRDA: L36197-F5008-F492 (IRDA 115.2 KBIT)
- Joystick: L36315-Z77-C218 (JOYSTICK)
- Surrounded Components (SIM Card Reader example):
- R1614 RESISTOR 4K7 (Type8) - L36842-C472-J
- C1605 CAPACITOR 2220N (Type3) - L36853-C6224-M6
- Z1601 FILTER SIM PROTECTION PB FREE - L50620-U6029-D670
- IRIS Diagnose Codes (examples):
- SIM Card Reader: 43300 Interface/SIM Cardreader/Mechanical Damage
- IO Jack: 46100 Interface/Charging Connector/Mechanical Damage, 47300 Interface/Data Interface/Mechanical Damage, 4B100 Interface/Headset Connector/Mechanical Damage
- Board to Board Connector: 32100 Keys / Main / No Function, 32200 Keys / Main / Reduced Functionality, 36000 Keys / Illumination
- Battery Connector: 13000 Battery/Mechanical Damage
- MMC Connector: 4E000 Interfaces/ Memory Card Rerader
- RF Connector: 81100-84200 Radio / various issues (No Contact, Low Receiving Signal, Dropped Calls, Call Setup) for both Internal and External Antennas
- Camera Connector: BA000 Accessories / Camera
- Display Connector: 21000 Display / Performance, 22000 Display / Background Illumination
- IRDA: 41100 Interfaces / IRDA / No Function, 41300 Interfaces / IRDA / Mechanical Damage
- Joystick: 32100 Keys / Main / No Function, 32200 Keys / Main / Reduced Functionality
Usage Features:
The CX75 and M75 phones offer standard mobile phone usage. Users can make calls, send messages, and utilize features like the camera for photography and Bluetooth for short-range wireless communication with compatible devices. The MMC slot allows for expanding the phone's storage capacity, useful for media files. The IO jack facilitates charging and connection to various accessories, enhancing the phone's functionality in different scenarios, such as in-car use or with headsets. The display provides visual feedback, while the joystick serves as a primary input method for navigation through menus and applications. The IRDA port allows for data exchange with other IRDA-enabled devices.
Maintenance Features:
This documentation focuses on Level 2.5 light repairs, which are intended for Siemens authorized local workshops.
- Repair Level: Level 2.5 light, requiring repairs of Level 2 classified boards.
- Environment: All repairs must be carried out in an ESD (Electrostatic Discharge) protected environment with ESD protected equipment/tools, adhering to international ESD regulations.
- Tools and Materials: Hot air blower, soldering gun, tweezers, flux, and solder are essential.
- Disassembly/Assembly: Must follow the latest CX75, M75 Level 2 repair documentation and special product dissembling instructions.
- Testing: Every repaired mobile phone must be checked according to the latest released General Test Instruction document.
- Regular Updates: Technicians are advised to check the C-market weekly for updates, Customer Care Information, and Repair Information relevant to CX75 and M75.
- Troubleshooting Flowcharts: Detailed flowcharts are provided for each component (SIM Card Reader, IO Jack, Board to Board Connector, Battery Connector, MMC Connector, RF Connector, Camera Connector, Display Connector, IRDA, Joystick). These flowcharts guide technicians through a diagnostic process, starting with visual inspections for oxidation, damaged pads, dust, twisted/bended contacts, and dry joints.
- Resistor Test Function: For many connectors, a multimeter's resistor test function is used to check the connection between spring contacts and soldering contacts, with an expected value of ~0Ω.
- Component Replacement: If issues persist after initial checks, the flowcharts direct to "Exchange [Component]" or "Level 2 Repair."
- Soldering Instructions: For component replacement, use a soldering iron or hot air blower to remove the defective component, clean the pads, and resolder the new component.
- Heat Management: Crucially, technicians must "Avoid excessive heat! Watch surrounding components!" to prevent damage. Specific warnings are given for the MMC Reader and SLIM-Lumberg connector, where excessive heat can damage plastic materials.
- Lead-Free Soldering: Adherence to new "LEAD-FREE" soldering rules (available in the communication market) is mandatory.
- Scrap Handling: All scrap information in the manual relates to SCRAP-Rules and instructions, indicating that certain components deemed "SCRAP" must be sent separately to WSC (presumably a Waste Service Center or similar facility).
- Technical Support: Contact information for the technical support team in Kamp-Lintfort, Germany, is provided for questions regarding repair procedures or technical issues.
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