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General| Model | RM-839 |
|---|---|
| Front Camera | No |
| Phonebook | Yes |
| Call records | Yes |
| Loudspeaker | Yes |
| 3.5mm jack | Yes |
| Games | Yes |
| Expandable Storage | microSD, up to 32 GB |
| Rear Camera | 5 MP |
| Connectivity | Wi-Fi 802.11 b/g/n |
| 2G Network | GSM 900 / 1800 |
| Radio | FM radio |
| USB | microUSB v2.0 |
| Messaging | SMS (threaded view), MMS, Email, IM |
Defines EU and US versions with GSM/WCDMA bands.
Lists hardware characteristics, SW features, and accessories.
Details cellular system, frequency bands, and output power.
Explains POS flash, restore, and tuning procedures.
Introduces general tools for testing, error analysis, and repair.
Guidelines for identifying and correcting baseband faults using LAB equipment.
In-depth guides for baseband circuit troubleshooting.
Procedure to start troubleshooting with PST self-tests.
Steps to troubleshoot power and charging issues.
Troubleshooting flow for devices that do not turn on.
Diagnosing high current issues upon power-on or battery insertion.
Troubleshooting flow for issues with identifying or using the USB charger.
Diagnosing problems with the 26MHz and 32KHz clocks.
Steps to diagnose issues with the power-on key functionality.
Troubleshooting for connectivity issues via USB and other interfaces.
Diagnosing failures during software flashing procedures.
Identifies issues like image corruption or damaged memory chips.
Troubleshooting steps when the phone cannot recognize the uSD card.
Diagnosing problems related to SIM card recognition and functionality.
Troubleshooting for PC detection and communication issues via USB.
Steps to troubleshoot issues with the keypad and display.
Diagnosing issues related to stuck or unresponsive keypad keys.
General instructions and flowcharts for display issues.
Troubleshooting guide for camera interface signals and connectivity.
Steps to diagnose camera hardware failure messages.
General guidance and test procedures for audio issues.
Instructions for baseband manual tuning and calibration.
Basic guidelines including ESD protection and measuring equipment.
Main troubleshooting flow for cellular RF related issues.
Troubleshooting flow for RF power supply voltage checks.
Procedures for RF auto tuning and testing using Nokia Care Suite.
Steps for performing automatic RF tuning.
Categorizes camera faults and introduces image quality analysis.
Diagnosing and resolving blurry image issues.
Visual guides for diagnosing camera hardware failures.
Flowchart for diagnosing general poor camera image quality.
Details support for 1.8V/3V SIM cards and Dual SIM functionality.
Details power supplies for XG614 and MAX8939 chipsets.
Overview of the Quark RF block and its components.
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