🗊Презентация MС165 maintenance. Instruction

MC165_Maintenance Instruction Prepared by：liufeng Approved by： Date：2011.04.27

TABLE OF CONTENTS 1 Overview MC165 1.1 About MC165 Phone 1.2 Distribution of the mainboard components 2 RF 2.1 RF Overview 2.2 Transmit 2.3 Receive 2.4 Common RF Malfunction 3 Baseband 3.1 Baseband Overview 3.2 Logic 3.3 Power management 3.4 Baseband common malfunction 4 Reference for maintenance 4.1 No power on 4.2 Shut off automatically 4.3 Dead halt 4.4 No charge 4.5 Quantity of electricity faulty detection 4.6 No display 4.7 LED NG (on the LCD) 4.8 LED NG (on the keyboard) 4.9 Key NG 4.10 No ring 4.11 No receiving voice 4.12 No sending voice or voice is small 4.13 No vibration 4.14 SIM card inefficacy 4.15 TF card inefficacy 4.16 Camera inefficacy 4.17 Bluetooth inefficacy 4.18 Earphone inefficacy 4.19 FM inefficacy

4.1 No power on

4.2 Shut off automatically

4.3 Dead halt

4.4 No charge

4.5 Quantity of electricity faulty detection

4.6 No display

4.7 LED NG (on the LCD)

4.8 LED NG (on the key board)

4.9 Key NG

4.10 No ring

4.11 No receiving voice

4.12 No sending voice or the voice is small

4.13 No vibration

4.14 SIM Card inefficacy

4.15 TF card inefficacy

4.16 Camera inefficacy

4.17 Bluetooth circuit(MT6612) Bluetooth is a design feature of this cellphone. It is with a matching Bluetooth headset and the phone has a container which can charge up Bluetooth headset through the main board, to accommodate Bluetooth headset. Some of the projects may not have this function, however, the mainboard is compatible. Please first ensure that the power is correct, according to the phenomenon and following schematic diagram to maintain the phone.

4.17 Bluetooth inefficacy

4.18 Earphone inefficacy

4.19 FM inefficacy