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 Continue reading “Assembling a Pisonet Box (Sample Pictures)” »
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. Continue reading “Trinium LCD TV 19″ Dead Set Problem” »
DEVANT LCD TV Model: 26DL29
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.
A leaky Electrolytic Capacitor with a part number of C849 with a value of 2200uf/16volts
Here is the location of the Leaky Capacitor
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 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 open the unit was the switch that is located on the CRT Board is switched to the center.
When he switched it back to the left side.
Then after that, the unit is restored backed to its original condition :)
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.
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 Controller.
Main Cause of the Problem :
Most probably caused by Corrupted Firmware of the SPI EEPROM which is mostly EN25T80 chip.
Why do the Firmware or Program become corrupted? One of the main reason is STATIC and the another one is due to poor power supply design or decoupling which reached by the spike and noise directly to the EEPROM.
These are the tools needed to revive the Firmware :
1. USB SPI Programmer
3. STK Sunplus Tool Kit 0.2.3 (rev 8203R)
1. READ a FULL BACKUP of the firmware of the DVD using your USB SPI Programmer.
2. Open the firmware with STK Sunplus Tool and this is what you will see:
Those 2 RED boxes indicates that your CRC or FILE CHECKSUM is damaged and thats the reason why it won’t work.
3. To correct the checksum simply save the firmware and the STK Sunplus Tool will correct the firmware automatically..SEE IMAGE
4. After saving, WRITE the firmware again to the EN25T80 using the USB SPI Programmer.
5. Test the unit