Ronelex Electronics Blog

Pisonet DIY: How to Adjust Allan Pisonet Timer Howto/Tutorial [Tagalog]

Decimal || Binary = Timer 0 || 00000000 = 1 min ok 1 || 10000000 = 2 mins ok 2 || 01000000 = 3 mins ok 3 || 11000000 = 4 mins ok 4 || 00100000 = 5 mins ok 5 || 10100000 = 6 mins ok

6 || 11000000 = 7 mins 7 || 11100000 = 8 mins ok 8 || 10000000 = 9 mins x 9 || 10010000 = 10 mins ok 10 || 10100000 = 11 mins 11 || 10110000 = 12 mins 12 || 11000000 = 13 mins 13 || 11010000 = 14 mins 14 || 11100000 =…

Basic CRT TV Parts And Sections in the Board

In this post, I will show you the Basic Parts And Sections in the Board of a CRT Television Set. You will learn the functions of each sections in a television set.

Here are the List of the Parts and Sections of a CRT Television set :

1] Speaker 2] Yoke 3] Video Amplifier 4] CRT Socket 5] High Voltage Section 6] Bridge Diode 7] Regulator 8] Audio Amp [green square] Audio Section 9] Tuner 10]…

How to reset bios password or supervisor password on Lenovo Laptop

This method should work on any laptop make. I do not take any responsibility if you damage your board. This video is only for reference on how to clear/bypass security settings. For those who looking for EEPROM location for Lenovo computer, copy and paste this web page: ja.axxs.net/eeprom_location.htm

Here are the instruction on how to do it but remember do it at your own risks.

1.…

How To Access Lenovo Ideapads Laptop BIOS or NOVO Button

I got trouble in formatting and setting time of the Lenovo Ideapads unit that I repair. I cant enter bios by just pressing F2 and I can’t find the NOVO Button until I find this guide on Youtube.Com which helps me to solve my problem :). Just watch the video and learn how to access the BIOS of Lenovo Ideapad Laptop Models. (more…)

Pisonet DIY: Basic Wiring Setup How to/Tutorial [Tagalog]

Pisonet DIY: Basic Wiring Setup Howto/Tutorial [Tagalog]

You can use this video as a reference when you are building own Pisonet Internet Business in your place. (more…)

Basics In Electronics : Microcontroller Course

Here are the contents of this tutorial:

Analog Electronics which includes about The Components of Electricity, Resistor, Capacitor, About Ohm’s Law, Inductor, Diode, Transistor, Relays and OP-Amps.

Digital Electronics which includes The Introduction to Decimal, Binary and Hexadecimal and The Introduction to Logic Gates (more…)

Solution For All China Board TV Can’t Receive Any Channel Signal

This is for all China Board TV that can’t receive any channel signal but the tuner is good and you may not need to replace or reprogram your memory IC. All we need to do is to copy the settings on it. If you don’t have the original remote controller of the unit, you can use the Universal Remote Controller

Step 1 :

set your remote to code 006 and press the 2 three times and the adjust menu will…

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 (more…)

Trinium LCD TV 19″ Dead Set Problem

Problem :

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 chips. (more…)

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…

Repairing A34JXV70X NEC TV With Picture Problem

I 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 king 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…

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…

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

I 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…

Huawei E5220-2 Pocket Wifi Unlock/Openline Tutorials

Huawei E5220s-2 Pocket Wifi Unlock Tutorials

After a long search on how to unlock my Huawei E5220s-2 Pocket WiFi  so I can use other sim rather than globe.  Then I found on a Symbianize Forum a method that can unlock my device without having to reflashed it, we only needs the New Algorithm Code to unlock it. Here are the following steps i did to unlock my device :

1. First you have to download…