Category:
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
0
1
2
3
4
5
6
7
8
9
Position:IcFull.com » IC Electronic information » Category: T

IC Electronic information

Troubleshooting Nokia 6230 mobile phone in 5 cases

In Electronic Infomation Category: T | on April 15,2011

Nokia 6230 phone is not

boot does not recognize the MMC card

Open the phone, power start, with the oscilloscope in the 4 X910 foot deck check VMMC supply voltage, that its amplitude is only 0.8V (normal value should be 2.8V); and GAL22V10B-25LJ datasheet and then measured the output pin voltage N910 VOUT, is 0.8V, suspected N910 damage. N910 replaced, and GAL22V10B-25LJ price and then measured VOUT, back to 2.8V. Test machine, the phone will accept the MMC card, troubleshooting.

Nokia 6230 phone does not boot and GAL22V10B-25LJ suppliers and can not write software,

Phone can not boot, with the Nokia DCT4 software maintenance device connected machine, the computer prompts "Invalid Model Descriptor received", can not write software. According to experience, the majority of such cases D200 power block Weld or damaged. Open phone, remove the hot air gun D200, carefully clean the pad and chip finishing. Tin on the chip and then re-planted after the solder back to the motherboard, power test machine, troubleshooting.

Nokia 6230 mobile phone is no signal

Open the phone, power is turned on, with the oscilloscope at test point J510, J511 at the examination, found no receiver I / Q signal that the receiver circuit is not normal. Check N500

the oscilloscope voltage VR1 ~ VR7, are normal, check the C547 at the 1.3V reference voltage VREF is also normal. Check with an oscilloscope module G500 LO feet, the voltage in the transition between 0.7 ~ 3.8V, indicating that the error control voltage is also normal. So the Z809 with a wire antenna switch 12 feet and shorter legs and then after test machine, cell phone signal and the network number to appear, indicating that the receiving channel is open circuit Z809, Z809 replacement after troubleshooting. Nokia 6230 phone can not

pictures

Open the phone, check camera head interface, X900, no bad. C902 with the oscilloscope at VCORE voltage, the normal voltage of 1.8V: C900 test again at VFLASH1, voltage is 0.1V, not normal, measuring the other end of L900, a 2.8V voltage, suspected open-circuit inductance L900. After using enameled wire shorted L900, try machine troubleshooting.

Nokia 6230 phone can not boot

Open the phone to the phone with 3.6V external voltage. Check with a multimeter kick to open the key S323, a 3V, high, normal. Press the S323, the observed current meter pointer on the power supply found in the swing of around 20mA, doubt the software information is wrong, but then disassemble the software for free treatment, still can not boot. Determine the fault in this hardware section.

At S323, while the D200 with a multimeter check the voltage of each output, all normal. Check with an oscilloscope B200 crystals, found no 32.768kHz clock signal.

Replace B200, the fault is still, and then carefully check the capacitors around the B200 is also no exception, so the D200 suspected internal damage. D200 replaced after the test machine troubleshooting.

GAL22V10B-25LJ datasheetGAL22V10B-25LJ suppliersGAL22V10B-25LJ Price

All right reserved:icfull.com © 2010-2016 Certificate