Service Manual Model :GD638/C705

Content Specification Method of SW Download Circuit Description * Phone layout * Icons Status of SLT100 LCD * H/W Features * S/W Features Specification Method of SW Download * Baseband Section * RF Section Circuit Description * Main Board * Trouble Shooting Trouble Shooting TEST Mode

Specification

Specification Icons Status of LCD -1 Icon Description Signal Strength : Shows the strength of the receiving signal. The greater the number of bars, The better the signal strength Roaming : Appears when the phone is roaming L1,L2 : Some SIM cards support two phone numbers and you can switch the number with this feature. The phone will display this icon when you set a line Missed Calls : Appears when there is missed call (s) New Message : Appears when a new incoming text message is arrived and unread MMS Unread : Appears when a new MMS message is arrived and unread MMS Busy : Appears when MMS is busy, such as receiving and sending a message Broadcast Message : Appears when Broadcast Message receive mode is active Call Barring On : Appears when the call barring mode is active

Specification Icons Status of LCD-2 Icon Description Call Forward : Appears when the call forward mode is active. IrDA : Appears when the IrDA port is activated. Ring : Appears when the Ring mode is active. Vibrate and Ring : Appears when the Vibrate and Ring mode is active. Vibrate then Ring : Appears when the Vibrate then Ring mode is active. Vibrator On : Appears when the Vibration mode is active. Silent Mode : Appears when the silent mode (manner mode) is active Alarm On : Appears when you set the alarm. Stopwatch : Appears when you set the stopwatch. Lock : Appears when you set the phone lock. Battery Strength : Shows the level of your battery. The more bars you see, the more power you have left General : Appears when you set the sound & Light profile as General. Meeting : Appears when you set the sound & Light profile as Meeting.

Specification Icons Status of LCD -3 Icon Description Outdoor : Appears when you set the Sound & Light profile as Outdoor. Indoor : Appears when you set the Sound & Light profile as Indoor. Headset : Appears when you set the Sound & Light profile as Headset.

Specification H/W Features Feature Description Dimension Main LCD 96(L) x 49(W) x 14.9(D) mm Main LCD 2.0” 262k TFT LCD (176x220) Sub LCD N/A Camera 0.3 Mega CMOS Flash Light Yes Speaker Stereo (Dual Speaker) Vibrator Built – in vibrator Antenna Internal SIM 3V BlueTooth Yes (hands free (HSP,HFP)) Stereo (GAVDA,A2DP,AVRCP) Data Transfer (FTP, OPP) FM Radio Recode Format : WAR,AMR Data USB Connection and PC Link Manager microSD (T-Flash Card) %Use only genuine microSD(T-Flash) cards approved & specified by the SD card Association and SanDisk

Specification S/W Features Feature Description RF Message Text Input GSM900 ,DCS1800 , Message MMS Text Input T9 Intelligent Text Input Camera 0.3Mega CMOS Camera Video Video Record & Play ( MJpeg) Wallpaper Pictures and user definable JPG, GIF, BMP Sound 64 Polyphonic True Sound MIDI, iMelody, WAV, MP3 Phonebook 500 of Phonebook Tools Calendar,, Alarm, Calculator,

Circuit Description (Baseband Section) 1.SC6610 (GSM/GPRS Base band Processor) Baseband POWER PART Baseband ANALOG PART Baseband DIGITAL PART

Circuit Description (Baseband Section) 1. Micro-Controller Unit Subsystem - Processor Core - Memoru Management - Bus System - Direct Memory Acess - Interrupt Controller - Internal Memory Controller - External Memory Interface Block Diagram of SC6620

Circuit Description (Baseband Section) 2. Micro-Controller Peripherals - Pulse-Width Modulation Outputs - Alerter - SIM Interface - Keypad Scanner - General Purpose Inputs/Outputs - UART - Real Time Clock - Auxiliary ADC Unit - IrDA framer SIM Interface Block Diagram 3. Micro-Controller Coprocessors 4. Multi-Media Subsystem Camera Interface Image Scaler LCD Interface Video&Image codec subsystem LCM Interface Block Diagram

Circuit Description (Baseband Section) 5. Audio Front-End Audio Block Diagram

Circuit Description (Baseband Section) 6. Radio Interface Control Baseband Serial Interface Baseband Parallel Interface Automatic Power Control (APC) Unit Automatic Frequenncy Control (AFC) Unit Block Diagram of APC unit Block Diagram of the AFC Controller

Circuit Description (Baseband Section) 7. Baseband Front End Baseband Serial Ports Downlink Path (RX Path) Uplink Path (TX Path) 8. Timing Gemerator 9. Power, Clocks Reset Baseband to PMIC Serial Interface Clocks Reset Management Block Diagram of Downlink Path Block Diagram of Uplink Path

Circuit Description (RF Section) 1. SR528 (RF Transceiver IC) INPUT 26M RX OUTPUT26M TX PMIC ( Power management IC)

Circuit Description (RF Section) 1. Receiver 2. Transmitter 3. TX VCO 4. Frequency Synthesizer 5. Voltage Control Crystal Oscillator (13MHz or 26MHz) 6. Regulator SR528 Functional Block Diagram

Circuit Description (RF Section) 2. RDA6231 (EGSM, DCS Power Amplifier Module) RX INPUT TX OUTPUT PAM IC ( Power Amplifier Module IC)

Circuit Description (RF Section) RDA6231 Block Diagram

Main Bord TOP Surface Component

Main Bord Bottom Surface Component

PCB LAYOUT (TOP – Reference)

PCB LAYOUT (Bottom – Reference)

Trouble Shooting 1. Power on Repair chart TOP Side 1. Check VBAT(3.8V) .If not ,Check the C810 VSIM 1.8V/3.0V – C208,C207 VMEM 2.8V- C500 VRTC 1.5V – C210 VCORE 1.8V- C220 U201 3. Check the Input X-Tal 32.768 Khz . (X201) If not ,Check the X201 Defective or Cold solder 4. Check the Output TCXO 26MHz (X400) If not ,Check the X400 Defective or Cold solder 5. Re download If not . Change CPU (U100) or MEMORY (U500) U500

Trouble Shooting 2. LCD Dead Repair chart (1) 1. Check the Connector ,LCD FPCB,LCD-Connector If not , Change the F-PCB,LCD 2. Check R606 Defective or Cold solder If not, Check the CPU Defective or Cold solder CON10 U500 U100

Trouble Shooting 3. LCD Dead Repair chart – Touch Pannel (2) 1,Check the LCD FPCB MODULE If not Change the LCD FPCB CONNECTOR 2, Check the R601,R602,R603,R604and TVS T601, T602,T603,T604 If not ,Change the Resistance and TVS U700 U500 LCD CONNECTOR

Trouble Shooting 4. SIM Error Repair chart 1. After insert SIM ,Check the LCD Display. 2. Check the voltage out. SIMCARD. 4,2 PIN (1.8V/3.0V) If not ,Check the CPUDefective or Cold solder. SIMCARD U300

Trouble Shooting 5. Melody Dead Repair chart AUDIO PA CLASS K 1. Check the speaker Spring state on Rear Cover If not good, Change the Speaker 2. Check the audio pa U302IS OK If not , Change the U302 CON130 AUDIO PA CLASS K

Trouble Shooting 7. Audio Dead Repair chart - (2) 1. Check the MIC. MIC1 If not ,Check the MIC1 Defective or Cold solder. 2. Check the MICBIASP of voltage is ok If not ,Check the CPUDefective or Cold solder MIC

Trouble Shooting 7. Audio RECEIVER Repair chart RECEIVER 1. Check the RECP. RECN If not ,Check the REC Defective or Cold solder.

Trouble Shooting 8. Vibrator Dead Repair chart VIB 1. Check the LCD,FPCB If not , Change the LCD,FPCB 2. Check the voltage of D801 If not , Change the Vibrator

Trouble Shooting 9. Camera Dead Repair chart U300 1. Check the connector state or camera module. If not ,Change the camera module 3. Check the voltage. 2 PIN (1.8V) 19 PIN (2.8V) If not ,Check the CPU Defective or Cold solder Camera Connector

Trouble Shooting 10. T-Flash Card Dead Repair chart 1 Check the T-Flash If not Good, Change the T-Flash. 2. Check the voltage of VDDSD is ok If not ,Check the CPU Defective or Cold solder U300 T-FLASH

Trouble Shooting 12. Charger Dead Repair chart MOS P-FET 1. Check the MOS P-FET Defective or Cold solder If not ,Change the MOS P-FET. MOS P-FET

Trouble Shooting 13. FM+BT Receiver Dead Repair chart 1. Check the Ear-Mic phone state If not ,Change the Ear-MIC phone. 2,Check the Voltage 6 PIN(3.0V) If not, Change the U100 BT+FM

Deberg Code Aoto ModeTest : *#888*# Code Test Infomation 1 Mmi Ui-Test 2 Version Info 3 Adc Calibrate info 4 Battery 5 Key Pad Test 6 LCD Test 7 Rtc Test 8 Vibrate Test 9 Backlight Test 10 Loopback Test 11 Torch Light Test 12 Bluetooth Test 13 Headset Test 14 Melody Test 15 MemorCard Test 16 FM radio Test

Deberg Code Test Mode Code Test Information *#1# SW Version Check *#06# IMEI Number