User Guide

ManualsBrandsNokia ManualsCell PhoneE62

6 — BB Troubleshooting and

Manual Tuning Guide

Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 6 –1

Summary of content (46 pages)

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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Table of Contents Introduction to baseband troubleshooting.........................................................................................................6–5 Baseband main troubleshooting..........................................................................................................................6–6 General power checking troubleshooting.................................................................................
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Nokia Customer Care RM-88 BB Troubleshooting and Manual Tuning Guide Figure 36 Ambient Light Sensor Calibration window.......................................................................................6–26 Figure 37 BER test result......................................................................................................................................6–30 Figure 38 Bluetooth self tests in Phoenix...............................................................................................
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Introduction to baseband troubleshooting This chapter outlines the troubleshooting process for any baseband related problems reported from our customer. All troubleshooting by service technicians will be limited to those parts that are not under any shields. Basic Troubleshooting for RM-88 The most likely problems that may be reported with RM-88 engine are listed below. • Phone does not power up or gets jammed during startup.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Baseband main troubleshooting Troubleshooting flow Page 6 –6 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care General power checking troubleshooting Troubleshooting flow Issue 1 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Battery current measuring fault troubleshooting Troubleshooting flow Page 6 –8 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Flash programming fault troubleshooting Troubleshooting flow Figure 34 Flashing pic 1. Take single trig measurement for the rise of the BSI signal. Figure 35 Flashing pic 2. Take single trig measurement for the rise of the BSI signal. Keyboard troubleshooting Context There are two possible failure modes in the keyboard module: • One or more keys can be stuck, so that the key does not react when a keydome is pressed.
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Nokia Customer Care RM-88 BB Troubleshooting and Manual Tuning Guide • Malfunction of several keys at the same time; this happens when one or more rows or columns are faulty (shortcut or open connection). For a more detailed description of the keyboard and keymatrix, see section Keyboard in System Module. If the failure mode is not clear, start with the Keyboard Test in Phoenix. Troubleshooting flow Page 6 –10 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care USB interface troubleshooting Troubleshooting flow Issue 1 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Dead or jammed troubleshooting Troubleshooting flow Issue 1 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Display module troubleshooting General instructions for display troubleshooting The first step is to verify with a working display that the fault is not on the display module itself. The display module cannot be repaired. The second step is to check that the cellular engine is working normally. This can be done by connecting the phone to a docking station and starting Phoenix service software.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Table 10 Pixel defects Item 1 2 White dot defect Defect counts Combine d defect counts Black dot defect R G B White Dot Total 1 1 1 1 1 Total 1 Not allowed. Two single dot defects that are within 5 mm of each other should be interpreted as combined dot defect. Note: Blinking pixels are not allowed in normal operating temperatures and light conditions. Issue 1 COMPANY CONFIDENTIAL Copyright © 2006 Nokia.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Display fault troubleshooting Troubleshooting flow Page 6 –20 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Display and keyboard backlight troubleshooting Context The device has one LED driver that provides current for the display backlight. The brightness of the display is adjusted by the Ambient Light Sensor (ALS). You can enable/disable ALS with the help of Phoenix service software. Display brightness can be adjusted manually, if ALS is disabled. If the ambient light sensor is enabled, it adjusts the display brightness automatically.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Related information • Display fault troubleshooting (page 6–20) • LED driver troubleshooting (page 6–28) • ALS troubleshooting (page 6–25) Issue 1 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care EL backlight fault troubleshooting Troubleshooting flow Page 6 –24 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care ALS troubleshooting Context • If a phototransistor is broken, replace it with a typical phototransistor. • After replacing the phototransistor or if calibration values are lost for some other reason, ALS re-tuning is required. • Before starting the ALS calibration procedure, perform the 'Pull-up resistor calibration' in dark lighting conditions, and write the measured 'correction' value to the phone.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Steps 1. Cover the light guide (upper part of the A-Cover). 2. Start Phoenix. 3. Choose File→Scan Product. 4. Choose Tuning→Ambient Light Sensor Calibration. Figure 36 Ambient Light Sensor Calibration window 5. In the Pull Up Resistor Calibration pane, click Start, and Write. 6. In the Ambient Light Sensor Calibration pane, check the Use default values only check box, and click Write. 7. To end the calibration, click Close.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care LED driver troubleshooting Troubleshooting flow Page 6 –28 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Bluetooth troubleshooting Introduction to Bluetooth troubleshooting There are two main Bluetooth problems that can occur: Problem Description Detachment of the BT antenna. This would most likely happen if the device has been dropped repeatedly to the ground. It could cause the BT antenna to become loose or partially detached from the PWB.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Figure 37 BER test result Bluetooth self tests in Phoenix Steps 1. Start Phoenix service software. 2. ChooseFile→Scan Product. 3. Place the phone to a flash adapter. 4. From the Mode drop-down menu, set mode to Local. 5. Choose Testing→Self Tests. 6.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care 7. To run the tests, click Start. Figure 38 Bluetooth self tests in Phoenix Issue 1 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Bluetooth BER failure troubleshooting Troubleshooting flow Page 6 –32 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care BT audio failure troubleshooting Troubleshooting flow Issue 1 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Audio troubleshooting Audio troubleshooting test instructions Differential external earpiece and internal earpiece outputs can be measured either with a single-ended or a differential probe. When measuring with a single-ended probe each output is measured against the ground. Internal handsfree output is measured using a current probe, if a special low-pass filter designed for measuring a digital amplifier is not available.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Loop test Input terminal Output terminal Path gain [dB] (fixed) Input Differen Outpu Outp volta tial t DC ut ge output level curre [mVp- voltage [V] nt p] [mVp-p] [mA] External Mic to Internal Handsfree XMICP and GND B2102 pads 32 100 - 0 80m A +/10m A Internal Mic to External Earpiece B2100 (OUT/ GND) XEARL and GND 35 100 1360 0 NA XEARR and GND Measurement data Figure 39 Single-ended output waveform of the Ext_in
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Nokia Customer Care RM-88 BB Troubleshooting and Manual Tuning Guide Figure 41 Single-ended output waveform of the HP_in_Ext_out loop when microphone is connected. Page 6 –36 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Internal earpiece troubleshooting Troubleshooting flow Issue 1 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Internal microphone troubleshooting Troubleshooting flow Page 6 –38 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care External microphone troubleshooting Troubleshooting flow Page 6 –40 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care External earpiece troubleshooting Troubleshooting flow Issue 1 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Introduction to acoustics troubleshooting Acoustics troubleshooting Acoustics design ensures that the sound is detected correctly with a microphone and properly radiated to the outside of the device by speaker(s). The acoustics of the phone includes three basic systems: earpiece, Integrated Hands Free (IHF) and microphone. The sound reproduced from the earpiece readiates through a single hole on the front cover (A-cover).
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Acoustics IHF troubleshooting Troubleshooting flow Page 6 –44 COMPANY CONFIDENTIAL Copyright © 2006 Nokia. All rights reserved.
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RM-88 BB Troubleshooting and Manual Tuning Guide Nokia Customer Care Baseband manual tuning guide Energy management calibration Prerequisites Energy Management (EM) calibration is performed to calibrate the setting (gain and offset) of AD converters in several channels (that is, battery voltage, BSI, battery current) to get an accurate AD conversion result. Hardware setup: • An external power supply is needed. • Supply 12V DC from an external power supply to CU-4 to power up the phone.