Nokia 1508i Troubleshooting Manual

Baseband description and troubleshooting

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1508i(RM-430)

Baseband Description and Troubleshooting

Nokia Customer Care

1508i (RM-430)

Mobile Terminal

Baseband Description and

Troubleshooting

Issue 1

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Troubleshooting

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Page 1 1508i(RM-430) Baseband Description and Troubleshooting Nokia Customer Care Nokia Customer Care 1508i (RM-430) Mobile Terminal Baseband Description and Troubleshooting Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 3 Baseband Description and Troubleshooting Nokia Customer Care 1508i system brief introduction 1508i main features 1508i is a CDMA phone based on the VIA platform. 1) CDMA PCS 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 1508i is a CDMA (PCS 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 Introductions CBP 5.6...
Page 6 Support for forward and reverse link data rates of up to 153.6 kbps (CBP5.6 only). Dual 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 Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 7 1508i(RM-430) Baseband Description and Troubleshooting Nokia Customer Care 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 9 The baseband is powered by the following PMU ACT5805 regulators: VDD_DIG = 3.0v VDD_CORE = 1.8v VDD_TXPLL = 3.0v VDD_TCXO = 3.0v VDD_ANALOG =3.0v VDD_RX = 3.0v VDD_TX = 3.0v VIB_P=2.8v~3.6v Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 10 POWER_ON signal is not part of the keypad matrix. The power key is connected to the PMU. This means that when the power key is pressed, an interrupt will be generated to the CBP in order to power on the CBP. The CBP Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 11 The PMU ACT5805 IC controls the power distribution for the whole mobile terminal, which includes the baseband and the RF regulators, but excludes the RF power amplifier (RF PA) which drains power from the battery Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 12 Enabled only when the system is VDD_TCXO 3.0V 80mA powered on (Off during sleep and power-off modes) Enabled when the system is KEYPAD_LED 3.0V 100mA powered on, or the keys are Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 13 OSC_EN signal from the CBP. . SLEEP Crystal Circuit for 32.768 kHz The 32.768 kHz crystal oscillator is the primary SLEEP clock source when TCXO clocks are disabled to save power. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 14: Charging Operation
Charging Operation Battery The 1508i 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.
Page 15: Display And Keypad
• ASIC orientations are OK. The following hints should help find the cause of the problem when the circuitry seems to be faulty. Troubleshooting instructions are divided into the following sections: Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 16 • 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 21 If it still doesn’t work, Audio PA chip or CPU chips maybe damaged from poor welding or injury. The chips then should be repaired by re-welding or replacement. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 25: Audio Pa Circuitry
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 payed on CPU cold welding. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 27 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 29 If the vibrator works, which means no control signal arrivals, do the check against he current’s flow. In addition, No Vibration after installation usually dedicates the welding excursion of the vibration. Check with it and see if it has been connected properly. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 30: Vibrator Circuit
1508i(RM-430) Baseband Description and Troubleshooting Nokia Customer Care No Vibration Troubleshooting Vibrator Circuit Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 31 Checking USB Check if the bottom insert of the mobile phone is well connected. Check if the COM of the computer is well connected and confirm the configuration of the COM setting. Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 32 Check if the VBUS, D+, D- and etc. are in their normal status. 10. Check if the USB over-Voltage IC works normally. 11. Check the welding of the CPU. USB Interface Disabled Troubleshooting Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 35: Uim Card Unreadable Troubleshooting
1508i(RM-430) Baseband Description and Troubleshooting Nokia Customer Care UIM Card Unreadable troubleshooting Issue 1 Copyright © 2008 Nokia, All rights reserved...
Page 36: Charging Faults Troubleshooting
1508i(RM-430) Baseband Description and Troubleshooting Nokia Customer Care Charging Faults Troubleshooting Issue 1 Copyright © 2008 Nokia, All rights reserved...

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Rm-430

Nokia 1508i Troubleshooting Manual

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Troubleshooting

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Summary of Contents for Nokia 1508i

Page 5: System Block Diagram

Page 14: Charging Operation

Page 15: Display And Keypad

Page 25: Audio Pa Circuitry

Page 30: Vibrator Circuit

Page 35: Uim Card Unreadable Troubleshooting

Page 36: Charging Faults Troubleshooting

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