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Getting Bias Current of an Output Transistor of an Amplifier Circuit

 
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Getting Bias Current of an Output Transistor of an Amplifier CircuitIn this article, we will be focused on getting the bias current of an output transistor of an amplifier circuit. According to wikipedia: Biasing in electronics is the method of establishing predetermined voltages or currents at various points of an electronic circuit to set an appropriate operating point. The operating point of a device, also known as bias point, quiescent point, or Q-point, is the steady-state operating condition of an active... [ Continue reading... ]

Jul
6

Maintenance of Sanwa YX-360TR Plus SCHEMATIC Diagram

 
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Maintenance of Sanwa YX-360TR Plus SCHEMATIC DiagramFor those who are looking for a copy of the schematic diagram on this type of Analog Multitester and  other brand using the same circuit diagram, you can download the schematic diagram in here. credits to Deantyne [caption id="attachment_135" align="aligncenter" width="500"] credits also to: Deantyne[/caption] For more information about this topic, you can visit Elab Forum for the discussion about this kind of Analog Multitester and... [ Continue reading... ]

Jul
6

Easy Way of Testing a Laptop Backlight(CCFL) and Inverter

 
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Easy Way of Testing a Laptop Backlight(CCFL) and InverterWe will be concentrating on LCD Inverter and CCFL bulb. Laptop with black screen problem is commonly caused by: 1. a defective backlight, which is the cold cathode fluorescent lamp(CCFL) bulb 2. defective laptop's inverter board 3. no video output going to the LCD Screen It is not an easy job repairing laptops specially if we don't have parts that we can use to replace to the parts we are suspecting to be the culprit. So now, we... [ Continue reading... ]

Jul
5

Repairing A DVD Player (No Display, Lights Only, No Buttons Functions)

 
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Repairing A DVD Player (No Display, Lights Only, No Buttons Functions)Repairing A DVD Player With Corrupted Firmware (No Display Lights Only, No Buttons Functions) Let me share to you this tutorial about repairing DVD player caused by corrupted firmware. Thanks to Ikasamoko of ELAB forum for sharing his knowledge on this topic. Problem: The DVD is on Half-Dead state, which means the power supply is OK all over the entire circuits, but no Display, Lights Only and No Response on Buttons or Remote... [ Continue reading... ]

Jun
17

Assembling a Pisonet Box (Sample Pictures)

 
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Assembling a Pisonet Box (Sample Pictures) Building own Pisonet with pictures to be used as guide and inspiration in building your very own Pisonet Unit. Bill Of Materials Used in the Assembly : 1 set pc - 12000 1 pc flywood - 870 timer - 250 coinslot - 180 paint and wirings - 500 speakers - 450 locks (mga kandado)- 300 glass - 120   And for the Prices and Specs for the Computer : Hdd Internal: wd 500GB (SATA 6Gb/s) PHP 2750.00 Memory: corsair vengeance... [ Continue reading... ]

Oct
29

Trinium LCD TV 19″ Dead Set Problem

 
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Trinium LCD TV 19″ Dead Set ProblemProblem : Trinium LCD TV 19" Dead Set Problem Power Supply is working fine. The Culprit : Defective 5v LDO Voltage regulator and I replaced it with 7805 V-Regulator. Leak and open Ceramic cap... [ Continue reading... ]

Oct
21

Repairing A DEVANT LCD TV Auto Shut Off Problem

 
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Repairing A DEVANT LCD TV Auto Shut Off Problem   DEVANT LCD TV Model: 26DL29 Trouble : If you turned on the main switch, the red pilot light will light up and then the blue light but then shut off. All the power supply in the output of the chopper transformer are all gone after it shut off. THis kind of trouble is commonly caused by the electrolytic capacitors in the power section.   Culprit: A leaky Electrolytic Capacitor with a part number of C849 with a value... [ Continue reading... ]

Sep
29

Repairing A34JXV70X NEC TV With Picture Problem

 
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Repairing A34JXV70X NEC TV With Picture ProblemI got this post from a Gsmsandwich forum posted by jesse_25 so all credits goes to him I'm just sharing it here in the site for reference if ever we encounter this kind of problem. History of the unit : The owner of the tried to clean his unit but after the cleaning, when he turned on the unit, the problem arouse.         So the owner brought the unit to jesse_25 for repair and what he saw when he... [ Continue reading... ]

Sep
25

Huawei E5220-2 Corrupted Firmware Solution (Blinking) Globe Pocket Wifi

 
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Huawei E5220-2 Corrupted Firmware Solution (Blinking) Globe Pocket WifiI found this tutorial on Symbianize.com forum I am a member looking for the solution for the Pocket WiFi Blinking problem and found out it is caused by a corrupted firmware. This is the second time I have encounter this problem on my device. The first time I encounter this problem is solved by bringing the unit to the globe and have them repair it.         In this post I will teach you the solution on... [ Continue reading... ]

Sep
23
 
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