6670/7610 SERVICING MANUAL
S.NO PLACE REASON
1 SWITCH ON PROBLEM � TO CHECK THE D461 SD RAM IC
� TO CHECK V CORE SUPPLY FROM SMPS
� TO CHECK ON/OFF SWITCH
� TO CHECK 26 MHZ CRYSTAL OSC
� TO CHECK THE BATTERY
2 NETWORK � TO CHECK VCOG 800
� TO CHECK WHETHER 26 MHZ CRYSTAL FREQUENCYIS CONSTANT OR NOT
� TO CHECK RF IC HAGER N5000 ,UEM ,CPU,ANTENNA(Z 800),RX,TXSWITCHES.
� TO CHECK THE SOFTWARE
� TO CHECK THE DEVICES ARE AFFECT IN WATER OR OTHER OILS
� CHECK THE RX FILTER Z803
3 POWER FAILURE � TO CHECK ON/OFF SWITCH
� TO CHECK 26 MHZ CRYSTAL OSC
� TO CHECK THE POWER ICUEM D250
� TO CHECK RF HAGER N 500RF IC,D460�K87561 ET-D17B PLASS IC
4 BATTERY CHARGE � TO CHECK THE CD 250 UEMCHARGING POWER IC,CHARGING TIP(IF FAULT CLEAN IT)
� TO CHECK THE CONNECTION OF CHARGING FUSE F 130&L 130 COIL
� TO CHANGE NEW CHARGER
� TO CHECK CHARGING SOCKET,BATTERY CONNECTION
� TO CHECK THE PROTECTOR DIODE V130 IN CHAREGR
5 CAMERA � TO CHECH CAMERA MODULE,D370 SWITCH,X 420 CAMERA CONNECTOR
� TO CHANGE THE CPU
� TP LOAD THE SOFTWARE
� TO CONTACT SOFTWARE ENGINEER
6 RING � FAULT IN RINGER TIP
� CHECK THE SPEAKER B 601,AUDIO IC N607S
� TO CHECK THE SPEAKER IS 8 OHMS.
� TO CHECK L 608,L 609,D 250,VIBRATOR PART .
7 HANGING � TO CHECK 26 MHZ OSC,RF IC,UEM SWITCH,FLASH IC
� TO LOAD THE SOFTWARE
� TO CHANGE THE UEM
� FINALLY AGAIN LOAD THE SOFTWARE.
8 LOW BATTERY AT CALLING TIME � TO CHECK THE BATTERY,UEM,PA POWER AMPLIFIER
9 RADIO � TO CHECK R451,D 440 USB IC,USB PRODUCTOR,USB IC,SYSTEM CONNECTOR X13.
10 BLUETOOTH COMMUNICATION � TO CHECK D 370 UPP-CPU UPP WD2-V 3.2E
� TO CHECK THE BLUE TOOTH IC D190
� MAY BE SOFTWARE DAMAGE.
11 SUDDENLY DISPLAY INCONNECTING THE SIM � TO CHECK UEM D250 POWERIC,SIM PRODUCTER R 310
� TO CHECK THE SERIES OF R 311 AND R 312
� TO CHECK THE SIM TRAY&SIM CARD
`12 MMC(MULTIMEDIA CARD) � TO CHECK THE MMC*311 CONNECTION,CPU SWITCH,MMC CARD DRIVE IC N310,MMC CARD PRODUCTER R315.
13 NO CONTACTS IN MOBILE � TO CHECK THE BACKUP BATTERY
