Daily News About IT World Products

check shorting in 5310..

1..remove this coil mark in (1)...if u want to check is light ic is short,.....

2..remove this coil mark in (2)..if u want to check ringer ic is short because rf ic also got +b volt from battery....

3..remove this coil mark in (3)..if u want to check audio amplifier voltage maker ic n2101 is short because bluetooth ic also got +b volt from battery....

4..remove this rf ic mark in (4)..if u want to check the shorting is remove because rf ic got +b from batery. it can be check only by removing this ic

5..remove this ic mark in (5)..if u want to check the shorting is removed..this ic also got +b it can be check only by removing this ic .

6..also check the blue tooth ic because it also got +b from batery it can be check only by removing this ic

7..at end remove avilma and betty ic...

all the component which are mark in pink colur these all are coils these are place in series and +b of batery is gone throw them so if u remove the coil u not have to remove ic to check the shorting in pcb it save time and ur ic ....

digitized

System hardware work on Nokia BB5

Once you know the hardware nokia BB5 following job step (Power ups Steps)

After the power ON

Sleep the Clock RETU, vana, VIO, VR1 and VDRAM
RETU voltage on the pin RSTX akan TAHVO enable ASIC
TAHVO active VCORE (RAP3G) ascillator and internal control VCOREA (OMAP)
VCTCXO regulators work and RFCLK (38.4MHZ) controlling by the regulator RETU
RETU issue PURX after 16ms after RFClk stable
2.4 MHz clock for the SMPS output in TAHVO
PURX out and after running 2.4 clock synchronization is detected, control TAHVO akan VCOREA
System work and run
Software functions to set the other regulators

RAP3G

RAP3G is a Radio Application Processor
Tiku its success (in the NOKIA 7600) with some technical development and the addition of features
In general RAP3G consists of three parts:
-Prime (Main Processor), set the 3 functions, namely PH3, DSP and related
-MCU Peripherals
-DSPperipherals

RAP3G run with NOS and oversees all activities of the modem
RAP3G core voltage of 1.40V at start TAHVO
VCORE and VI / O (input / output) comes from the CORE RETU VIO.Power on sleepmode under 1.05V

RETU

ASIC is RETU EM major functions including the function block:
Start-up control logic and reset
Charging-deteck process
Battery-voltage Monitoring
-External 32.768kHz crystal clock with the
Real-time clock with external battery backup
SIM-Card interface
-Streo audio codecs and amplifiers
-A / D converter
-Regulator
Vibra-interface
-Digital interface (CBUS)
RETU ASIC does not have any function securyti the withdrawal UEM (E, K)

TAHVO

EM is TAHVO including ASIC function block:
CORE-supply generation (VCORE & VCOREA)
Level-shifter and regulator for USB / FBUS
Battery-control processes such as the charging
External LED-driver control interface
-Digital interface (CBUS)
-TAHVO ASIC does not have any security function of the withdrawal UEM (E, K)

CMT Flash

CMT Flash memory used to store:
-MCU program code
DSP-prgram code
-Tuning Values
-Certificates
Capacity-64Mbit
Logic-supply voltage and for NOR Flash in the output from the VIO (1.8V)
Flash Clock is 48Mhz (192Mhz / 4)

CMT SDRAM

CMT SDRAM is dinamic data storage for the MCU data
Capacity 64MBit
SDRAM core voltage (1.8v) output by the regulator RETU VDRAM
Voltage I / O (1.8) in the output by RETU VIO regulator
SDRAM clock is 96Mhz (192Mhz / 2)

OMAP

OMAP is an application of the system running with Symbian (EPOC)

Platform for ease of use application, the basic interface (Main Interface):
-Cameras
The screen -
-Bluetooth
MMC -
-USB
-Keyboard
XBUS-to medium with RAP3G
OMAP is a standard ASIC design by Texas Instrument and in use by the Vendor and other NOTEBOOK
VCORE CORE Voltage (1.4V generated by the discrete SMPS and work under 1.09V on sleepmode
I / O voltage VIO (1.8V) by RETU

APE COMBO MEMORY

APE flash used to store application code and user data
Lets not to access the code directly from Flash ---> loader must walk to and from DDR
256MBit capacity (flash), 256MBit (DDR)
DDR voltage to 1.8V is VDRAM
VIO is 1.8V of DDR I / O
Both NAND core voltage and I / O originating from RETU
Clock is 110Mhz DDR (220MHz / 2)
Flash interface speed is 22MHZ

Product Specific Circuitries

Front of the camera
in front of the camera control and data collection by the OMAP
OMAP's VIO voltage is 1.8V and one of them is 2.8V because of the level shifter need
Take the camera from two different voltage LDO (Low-Dropout Voltage)
VCAM 1.5V for a series of digital camera sensor and A / D-converter
VCAM2 2.8V for camera I / O and sensor photo diode

Camera back

Connected to the OMAP through data and control interface
Data on the differences SALURKAN through serial interface using the clock and data
Kontroli connect the camera directly to the control interface that kompatibble IC with 2% using the SCL SDA signal (1.8V)
Digital camera: discrete VCAM 1.5V from LDO
****og camera: VAUX 2.5V from RETU
Additional control signal
Vctrl: High = 1.8V Camera active-low = 0V camera is not active
Extclk: CLOCK's OMAP1710 (9.6MHz)

Camera Flash Light

Designed to provide better lighting when taking pictures in dark room
The same LED also in use as an indicator light when a video is being taken
TK1189 is SMPS for FLED, in use as the two host controller
Flash in the control set by the camera
Mode indicator in the set by OMAP

Bluetooth

BTBC3 single chip (including RF, BB & ROM memory)
UART interface for control / data with the OMAP
PCM interface for audio data with RAP3G
I / O 1.8V from VIO
****og voltage of 2.85V through battre discrete LDO
38.4MHz clock from the RF

here is trick for repair display without changing display ic

here is trick to repair display without changing display ic
i personally not tested this trick but hopefully it will work

try and post ur result

here is sample of nokia n70

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