Here are the Software Needed:
1. Download the QPST Software.
2. Download the Huawei Flasher, credits to "FrAnCeScO" for making this flasher.
3. E153 Downgrde Firmware
Warning: Do it on your own risk. I will not be held responsible on any damage done to your device.
Then here are the steps in Unlocking our Huawei Modems:
1. Make a backup first of your NVitem using QPST. Go to the link provided for the instruction. You must do it... [ Continue reading... ]
Here is diagram of the wiring of a Piso Net, which is popular here in the Philippines by using a PC with a Timer and Coin Slot to operate an Internet Cafe even without supervision because it is made to operate automatically. The main issue here is what signal or power source that you will cut to switch it using a relay. Some users are freezing the keyboard and mouse while other cut the signal or power line of the... [ Continue reading... ]
In this new article, we will now be talking about the use of the Optoisolator IC which is commonly used in the feedback circuit on a variety of power supplies that are autovolt on my opinion. Most power supplies like DVD players and Chargers that I have repair using an Optoisolator IC with a value of PIC817, this power supply is autovolt, which means it can be plugged either on a 220 volts or 110 volts supply source.
According to Sirkevin,... [ Continue reading... ]
Here are some of the useful information that we must know if we want to learn about TV Repair, but before this, you must also have the knowledge about the electronics components and the symbols that we see when dealing a schematic diagrams and printed on the circuit boards. You must learn the basic functions of the Resistors, Diodes and other semiconductor components that are available on electronics circuits. For more information about the... [ Continue reading... ]
Today, I am repairing a POS unit which is used on the transaction on the sale in the Mall I am working.
The problem of this unit is that having a No Display Problem. I checked the unit and found out that there are a lot of electrolytic capacitors that get bulgy on its top which is a sign that it is defective. So I take out from the circuits those two big electrolytic capacitors for checking. You can also replaced directly all... [ Continue reading... ]
The best way of testing a capacitor will depends to the type of capacitor you are going to test. Electrolytic capacitors that are leaky are not so common. You can take each capacitor out on the circuit and test it using a cap checker or using your VOM, but in-circuit testing of the capacitor is quicker and save a lot of time.
Do a visual observation and inspection to the capacitor and see if there are any electrolytic capacitor are... [ Continue reading... ]
These are the common display or deflection problem that you can encounter when troubleshooting a CRT TV and Monitors. You can print this image to serves as your reference when you are repairing a deflection or display problems of a CRT TV and Monitors. For beginners who are new in this field, they don't know how it looks like a Pincushion or Keystone Distortion problem, that is the reason why they have difficulty in looking the... [ Continue reading... ]
Early this morning, I've got a call from Jollibee ICM regarding to the UPS on one of their POS because it is not turning on. So I go to there place and checked he unit and I've decided to pull out their UPS to it to IT office to check for the possible cause of the problem.
When I arrive in the office, I checked the unit immediately and I've found out that the fuse is blown. So I check the circuit board for the possible cause of blowing... [ Continue reading... ]
Some of us like technician want to learn more about the Switch Mode Power Supply commonly called SMPS. This is a special type of power that uses a chopper transformer instead of an ordinary metal core transformer. We have to learn how this type of power supply works for us to have knowledge on how to repair this switch mode power supply if we will encounters problem related to power supply.
According to wikipedia:
A switched-mode power... [ Continue reading... ]
