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 the... [ Continue reading... ]
One of my co-worker brought his dead power supply. This is a power supply of a slim type desktop computer. The history of this unit, it is a package from abroad and it is rated as 220 voltage source. He plugged the unit to the outlet and shocked when it sparks and the unit is not turning on. So he brings the unit here in the office for repair.
I checked the unit and I found out that the fuse is... [ Continue reading... ]
Recently, I got this unit from my cousin for repair. It is a Sharp Component System with a model number CD-BA3100H having an er-ap00 Error.
Before the Repair
I have searched to the internet for some possible solutions for this kind of error but I can't find any solution regarding in this error. So I try to repair this unit. I have opened it and try to isolate the problem. This unit have two Power Amplifier, I hang up the Power Amp IC one... [ Continue reading... ]
This is a project for those who want to build their very own Automatic Battery Charger. This is a project made by one of the member of Elab Forum, duc_tech. But as a reminder, this circuit don't have a current limiter which means this charger is good to use only on a known good battery but not on a battery that have defects like having a short or open plates which will cause the diodes, switching Thyristor and transformer to heat easily.... [ Continue reading... ]
In this post, I will share to you an article from the Elab Forum about the Aiwa Mini Component that RoYa16 is repairing. It has a no power problem. Won’t power ON but the tape indicator (play, rewind, Fast-forward) have light indicator even it is not power on. So he troubleshoots the main board but it is ok according to him, then after that he troubleshoots next the front board. In the front board, here he saw shorted electrolytic... [ Continue reading... ]
I have just received this PS2 keyboard from other department for repairs. A defective is one of the most commonly cause of the problems for an undetected PS2 Keyboard problem especially in the office. It doesn't have any function on all its keys and it is also not detected by the PC. So I checked first the wire for a trace of a broken (putol) wire. Then I found out that the red wire is broken (putol). I get the pin config of the defective... [ Continue reading... ]
Upon surfing the net, I found this interesting website that can be useful to those students and technicians want to be that starting to learn repairing televisions units. Just a piece of reminder,
The codes that we are going to learn about is not suitable for users, these code are for those technicians that needs to access the system control of a television to made some adjustments especially when you newly replaced a memory IC that is... [ Continue reading... ]
I am having a home service to a Sony TV model KV-21TSR1 with a complain of having a loud noise coming inside the unit that looks like the tube is going to break. I suspect that the FBT (flyback transformer) is the main cause of the problem for having a leak maybe on its high voltage so I opened the unit and checked immediately the FBT and then I found out that it has a cracked on the body of the FBT. So I take out the FBT from the board by... [ Continue reading... ]
[tnkgrl] has modded an Acer Aspire One subnotebook to have internal Bluetooth to be used for connecting her Buetooth mouse and her Sony Ericsson as modem. She covers disassembly and adding the Bluetooth hardware in the circuits and to locate the pins where to connect.
Modding the Asus 701 (Eee) –... [ Continue reading... ]
