Posts Tagged ‘PIN’

Led Electronic Display Repair Guide

December 13, 2015

Judge issues must be handled after hsien Chu, clear, severe, small problems. Short circuit LED fluorescent lighting should be the highest priority.
1, resistance detection method, adjust the multimeter to resistance, detect a normal circuit board of a point of resistance, then testing another piece of the same circuit board with a points test and normal resistance values are different, different if you determine the scope of the problem.

2 voltage detector, multimeter voltage regulation, detecting suspect circuit voltage of a point, are similar to the normal, or determine the scope of the problem.

3, short circuit LED Flood Light Supplier detection, adjust the multimeter to the short block (some diodes voltage drop or resistance stalls, usually with alarm function), checks for short circuits happen, after finding the short circuit should give priority to, so that it does not burn out other devices. The method you must do so in the case of power off circuit, preventing damage to the table.

Detection method 4, pressure drop, adjust the multimeter to diode voltage drop test document, because all of the IC is made of numerous basic components, but small, so when it comes on a PIN when there is current through, there is a flexible led strip lighting voltage drop on the PIN. General of the same model similar to the pressure drop on the same IC pins, based on pressure drop in PIN value comparison, operation must be power off circuit. The method has some limitations, such as the detected devices are high impedance, not detected. Four processing steps, panels-frequently asked questions Board failure:

A. Panel is not lit

1, check the power supply and the power supply is connected.

2, check whether the test card to identify interfaces, test card red light flashing is not recognized, check whether the lamp power with test cards, or the lamp panel connector interface signal and the short-circuit caused no recognition. (Smart test card)

3, detect 74HC245 deficiency-free welding short circuit, on 245 (EN) signal input or output pin is a virtual welding short circuit to the other lines. Note: the main power and enable (EN) signal.

B. helical scan, regularity of interlacing is not lit display overlapping

A, b, c, d, 1, check whether the signal input to the 245 disconnection or Xu Han and short circuit.

2, testing corresponds to 245 outputs a, b, c, d or Xu Han, short circuit between 138 and circuit breakers.

Detection of 3, a, b, c, d between the signal short circuit or a signal and the short-circuit. Note: the main test ABCD signaling.

C. iseedeadpeople with line or lines are not lit

138 per cent between 1, detection or virtual welding line circuit breakers, short circuit.

D. scan, two or more rows (typically are multiples of 2, law) at the light

1, a, b, c, d, the signal is detected between the short circuit.

2, detect whether 4,953 output and output short circuit.

E. iseedeadpeople with single-point or multi-point (irregular) is not lit

1, find the module corresponds to the measurement and control foot line short circuit.

2, replace the module, or a single lamp.

F. iseedeadpeople has one or more columns is not lit

1, found on the module controlling the PIN, measure and driver IC (74HC595/TB62726) output port connection.

G. single point or highlight a single column, or entire row highlighted, and is not subject to control

1, check whether the column is short circuit and power supply.

2, test the line with power-cathode short-circuit.

3, replace the drive IC.

H. display confusion, but the output signal of a Board under the normal

245 corresponds STB latched outputs 1, detection and driver IC latch-side connections or signal short circuit to the other lines.

I. display confusion does not output correctly

1, detection of clock signal CLK latch STB is shorted.

2, measuring 245 clock CLK input/output.

3, tests whether the clock signal short circuit to the other lines.

Note: the main clock and latch signal is detected.

J. display the missing colors

245 1, detection of the color data of the port has input and output.

2, test whether the data of the color signal short circuit to the other lines.

3, test the color of cascade data between the driving IC is short circuit, virtual circuit breakers or welding. Note: the available voltage detection method is easier to find the problem, test voltage is different from normal data, determine the fault zone.

K. output problem

1, test the output interface to the signal output of the IC line connection or short circuit.

2, the output latch of the clock signal is detected correctly.

3, testing the last drive IC between concatenated output data and the output interface data port connection or short circuit.

4, the output signal is a short circuit or a short circuit to ground.

5, check the output of the cable is good.

Keyloggers Not Just For Master Criminals

May 26, 2015

Why Keyloggers Are For Everyday People Too!

Have you ever had money stolen from your bank account
after you used an ATM to withdraw cash? Do you know someone who has? If
so, you will know all about the hassle involved to contact your bank,
fill in reports and worry whether your money will be reimbursed. Not to
mention the great shock when you first discover your account has been
emptied!

Did you wonder afterwards just how the thieves managed
to get your private information to get into your account? Keyloggers are
the answer.

ATM’s can be a prime target as many of them are
positioned outside on streets where they are easily accessed. Thieves
can easily install keyloggers onto the machine and wait in the nearby
vicinity for an unsuspecting user to enter their details. As soon as the
card is swiped and the PIN entered, the information is electronically
transferred to the thief and they can go to work on your account.


A quick Google search will bring up dozens of photographs of this
hardware installed – in many cases you can’t even see the keyloggers
even though they are right there in front of you! Some banks have even
sent emails to their customers showing what to look out for when using
an ATM. They are trying very hard to minimise the losses they are
experiencing from this type of theft.

Keyloggers are not always used for evil however!


You may want to keep tabs on your child’s internet usage, making sure
they are safe and not talking to online predators on facebook or other
sites. Maybe you’ve set internet limits for them. No internet until
after 6pm when homework is done, for instance. A hardware keylogger is a
quick and easy way to make sure you know what they are doing online as
you can easily check their usage just by having access to a computer.


Maybe you have a business and want to make sure no information is
stolen. Keyloggers can quickly be installed on your company computers
allowing you to make sure no sensitive information is being shared with
anyone outside the business.

Perhaps you suspect your spouse is
not being honest with you about something. Just plug in a hardware
keylogger to your home computer and you can give yourself peace of mind.

With so many uses today, keyloggers can be used by everyday
people to protect those they love and also to protect their business and
personal interests.

Mechanism Technology of BlackBerry smart phone

October 22, 2014

The most important and promising feature of this BlackBerry smart phone is push e-mail technology. This push e-mail technology works through a software package called black berry enterprise software. There are multiple versions of this BES available for lotus domino, Microsoft exchange and Novell GroupWise. Every blackberry has its unique ID called blackberry PIN which is used to recognize the device to BES. Basically, blackberry enterprise server functions as an e-mail relay for accounts of corporate so every users can easily access their e-mail. This software scans users inbox and when new message comes in, it pick up the message and send it to the Rims NOC (network operation center). Then message relayed to users wireless provider which deliver it to the users blackberry mobile phone. Therefore, this one is called push e-mail technology. All new contacts, calendar entries, and e-mails are pushed out to the blackberry mobile phone instantaneously and automatically.

Even this mobile phone allows user to access their message in offline status without wireless connections. When user reconnects device to wireless, BES send the latest and update data to the blackberry device. Another latest feature of blackberry smart phone is to track your location without using of GPS through trilateration. This trilateration process to track the location consumes less battery and enable user to know about the exact location.

The most important alternative of blackberry enterprise server is blackberry internet service. This BlackBerry internet service is developed for the general user rather than business user. This service allows user to access their e-mail accounts. This alternative supports all push e-mail features however; the speed and connectivity will be affected. This mobile phone also functions as media player which is portable and light. You can download latest BlackBerry Videos from the internet. The videos of blackberry must be in mp4, 3gp, and wmv formats. You can search latest videos over the internet and choose your own favorite. You can purchase your blackberry mobile phone directly from the online stores. There are multiple websites which offer blackberry mobile phones. You can easily get more details about the blackberry smart phones.