Nokia 1508 Manual

Baseband description and troubleshooting

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1508(RM-388)

Baseband Description and Troubleshooting

Nokia Customer Care

1508 (RM-388)

Mobile Terminal

Baseband Description and Troubleshooting

Issue 1

Table of Contents

Troubleshooting

Summary of Contents for Nokia 1508

Page 1 1508(RM-388) Baseband Description and Troubleshooting Nokia Customer Care Nokia Customer Care 1508 (RM-388) Mobile Terminal Baseband Description and Troubleshooting Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 3 Baseband Description and Troubleshooting Nokia Customer Care 1508 system brief introduction 1508 main features 1508 is a CDMA phone based on the VIA platform. 1) CDMA Cellular support only 2) FM stereo radio 3) Compliance to USB 2.0 (full speed) 4) R-UIM card...
Page 5: System Block Diagram
Nokia Customer Care System Block Diagram System Description 1508 is a CDMA (Cellular band) Mobile Phone. The phone supports: - forward and reverse link data rates of up to 153.6kbps. - 4GV vocoder - 1.47”(128*128) CSTN LCD - Stereo FM radio Platform Introduction CBP 5.6...
Page 6  D ual supply voltage (1.8 V digital core, 3.0 V analog and 3.0 V digital I/O) 3.0 V or 1.8 V external memory interface USB support (12 Mbps) Removable User Identity Module (R-UIM) compliant with IS-820 32-voice polyphonic ringer Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 7 ADC channels include: Tx RF power measurement, battery voltage, and temperature sensors. The baseband is powered by the following PMU ACT5805 regulators: VDD_DIG = 3.0v VDD_CORE = 1.8v VDD_TXPLL = 2.85v VDD_TCXO = 2.85v Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 8 1508(RM-388) Baseband Description and Troubleshooting Nokia Customer Care VDD_ANALOG =3.0v VDD_RX = 2.85v VDD_TX = 2.85v VIB_P= 2.8v~3.6v Figure 1 Component layout (Bottom) Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 9 The PMU IC die temperature exceeds its “severe” over-temperature threshold. Clock Distribution The CBP derives its internal clock from two clock inputs, VC-TCXO and SLEEP_CLK. The main clock signal for the baseband is generated from TCXO. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 10 (NRST) is not released if the battery voltage is less than 3.2V. The baseband is powered by the following PMU ACT5805 regulators: Rating Regulator Voltage Notes Current Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 11 TCXO input such that the TCXO_OUT signal is glitch free, only valid TCXO pulses are output. SLEEP Crystal Circuit for 32.768 kHz The 32.768 kHz crystal oscillator is the primary SLEEP clock source when TCXO Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 12: Charging Operation
Charging Operation Battery The 1508 uses a Lithium-Ion cell battery with a capacity of 860mA.CBP reads the resistor inside the battery pack on the BSI line to identify the battery size. Different charging algorithm will be used for different battery sizes. The resistors are connected to the BSI pin inside the battery connector.
Page 13: Display And Keypad
• CBP5.6 is underfilled and can not be replaced. • The Shielding Case Assy can not be reused after removal. • After using the heatgun, the domesheet needs to be replaced. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 17 If it still doesn’t work, Audio PA chip or CPU chips may be damaged from poor welding or injury. T The chips should then be repaired by re-welding or replacement. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 21: Display Faults
LCD and its operation voltage should be checked. If the results show poor condition, then find the fault reason and do the replacement and double welding. More attention should be paid on CPU cold welding. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 23 R5 and C0 to C3) and each group use one CPU’s GPIO. Thus the faulty running GPIO can be located by confirming the faulty keys. Further, short circuited signal or cold welding of the CPU should be modified or replaced. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 25 In addition, No Vibration after installation usually dedicates the welding excursion of the vibration. Check and see if it has been connected properly. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 27 Check the welding of the mobile phone connection, whether there is foreign impurity or not. Check if the Rx, TX, DTR and etc. are shortcircuited to the ground. Check the welding of CPU. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 29 Check the welding of the mobile phone connection, whether there is foreign impurity Check if the VBUS, D+, D- and etc. are in their normal status. 10. Check if the USB over-Voltage IC works normally. Check the welding of CPU. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 33: Uim Card Unreadable Troubleshooting
1508(RM-388) Baseband Description and Troubleshooting Nokia Customer Care UIM Card Unreadable troubleshooting Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 34: Charging Faults Troubleshooting
1508(RM-388) Baseband Description and Troubleshooting Nokia Customer Care Charging Faults Troubleshooting Issue 1 Copyright © 2008 Nokia, All rights reserved...

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Rm-388

Nokia 1508 Manual

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Summary of Contents for Nokia 1508

Page 5: System Block Diagram

Page 12: Charging Operation

Page 13: Display And Keypad

Page 21: Display Faults

Page 33: Uim Card Unreadable Troubleshooting

Page 34: Charging Faults Troubleshooting

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