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Crazy ants & a solid metal – Macbook pro

Posted by jimstech on May 29, 2016

All of a sudden while starting my lappie, as a macbook user, most of us are well known to the initial chime with the DVD drive engagement sound. But to me on that day, the drive engagement sound was totally different and the initial boot took some seconds more.

Thinking that some thing is going wrong with the drive pre-check at the booting time, my macbook has already arrived the desktop screen. Within some minutes i could able to see uninvited guests popping out from the keypad area.

To my surprise, not just one or two..!!!!!, a bunch of crazy ants trying to come because of the warmness it felt from the processor. i’m pissssseeeedddd….. 😦 .. yes really.

Is the apple metal tastes soooo sweet for the ants ?????? 😯

To respond with my uninvited guests, i’ve just quickly turned off the machine and prepared myself to openup the rear cover. Yes,., shocked to see the whole bunch of crazy creatures around the DVD drive area and HDD area. But, Thank God..!! those creatures were happy to roam around the logic board and not top of it..If in that case, the PWM or some of the SMC’s could have went short.

Have a look at the below images for the uninvited creatures.!!!


Logic board – Macbook pro

All tiny black dots (above and below) are ANTS having their team meeting to plan for the next set of a adventurezzzzz..!!!!!


rear case – Macbook pro


But this given me a chance to do a maintenance cleanup – usually the processor fan and the logic board.

Beware..!!!! do not pour out any alcohol type cleaner for cleaning without disconnecting the battery from the logic board. Do make a note of the screws location while disassembling. This model has 3 different set of screws (Unibody 2011 models & later) for holding the rear case and never try to push wrong screws into the holes.


Macbook pro – Battery connector


Unibody macbook pro – 2011 model screw locations


I think this is the 3rd or 4rth time the rear case is opened up for maintenance activity. Happieeeeeeeeeeee that there is no damage for any of the internal parts :).


After few weeks of usage, i could able to understand that the internal speaker/woofers diaphragm is eaten by these creatures..!! looking out for a quality replacement 😦


Posted in Electronics, General, Hardware issues, MacBook /MacOS, Pc Tips & Tricks | Tagged: , , , , , , , , | Leave a Comment »

EBL 840 9V Charger with 600mAh Battery – Review

Posted by jimstech on May 14, 2016

It’s been some months, i thought of buying a 9v rechargeable battery for my wireless audio equipments. But from the past experience which i got from the AA rechargable batteries supported by useless chargers made me to do some research which took some months to take a decision.

Upon arriving a closer point of purchase, the decision was to buy a simple and cheap charger controlled by a MC/ MP. with some reviews from here and there from the internet and audio forums, the product which i bought is EBL 840 with 2 pieces of 600mAh battery for $36 inclusive of International shipping to India.

Amazon link for buying EBL 840



Input: 100-240V AC 50/60Hz 120mA
Output: 1.2V DC 200mA;3.6V DC 150mA;9V DC 100mA
No Load Power Consumption: 1W MAX
Full Load power consumption: 5W MAX
Battery Charge Rate: >80%

Compatible with:
6F22(9v) li-ion Battery
6F22(9v) Ni-MH/Ni-Cd Battery



After receiving the product, the first impression is the packaging which was good enough to withstand vibration and sudden drops. Preliminary checks are done with voltage readings on both the 6F22 batteries and the charger. The first-worst experience is the one, Needless to say, the 2 page mini user guide which is an absolute crap of no matching information.

Alright, since i have paid more than INR-2k for this product the internal guy inside me was very curious to see the internal circuit and components used. Housing was good with US standard attached power plug at the rear top area. The whole device was secured with just 2 screws which made the disassembly job very easy.

Initial catch was the markings in the PCB which states that the original manufacturer is Beston (BST), a china manufacturer who has some good reputation in European countries among their products. The same circuit model (BST-C818) is also listed on their website. My device is tagged as design version(v1) relesed in the late year of 2014.


HOT Area:

The first component which catch’d my eye upon removing the top housing is the transformer. Circuit design is very simple with not much safety components. AC line is directly connected to the SMD Bridge Rectifier via 10 ohms 1/2 watt resistor in series and there is no pre line filter’s. Output from the BD is filtered by a 400v E-Cap and sent to switching transistor with some mega ohms resistor in parallel connected with a zener and 104  ceramic capacitor in between.As asusal in all SMPS circuits, the switched voltage is feeded to mini transformer which isolates the High-low voltage area.


EBL 840 – internal front view


COLD Area:

Output stage of the transformer is again stabilized with some resistors and zener’s with a single SMD capacitor. Single comparator for each battery terminal is connected with the LED indicators. But these comparators also sense’s the inflow current to batteries which is under charge. There is a SMD which has 5H5 named on it which is a step down constant DC-DC 600ma IC that controls the entire charging process. It also has an feedback pin which controls the output when the battery is fully charged.


EBL 840 – internal rear view

Overall, this charger is a compact one with a variable voltage from 100v-240v which charges 2 pieces of 6F22 9v li-on/ Ni-MH/ Ni-Cd batteries at a time in parallel. Charging status is identified by the Red color LED indicators. Downside is, the circuit will not withstand sudden spikes and will be noisy for sure.


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Major service centers in chennai

Posted by jimstech on July 17, 2010

All Service Centers Work from : 11AM to 5.00PM on working days


ACER Laptops :  SMS to +91-9901676677 : they will call back 1800116677

ACER Monitor : Call For Onsite Service for LCD Monitors 18003000 1919

Altec Lansing  & ASUS : Rashi Peripherals, 20/1 Club Road, Chetpet (Behind Shree Mithai) 42849275 / 42849276

APC UPS :  Call For Onsite Service  18004254877 / 39022272

ASUS ( All Products ) :  Rashi Peripherals, 20/1 Club Road, Chetpet (Behind Shree Mithai) 42849275 / 42849276

Canon : Call for On-Site / Carry in Location 42385200

Creative ( All Speakers) :  Addonics, Old 5, New 9, Kuppu Muthu St.,( Near: Hotel Srinivasa ), Triplicane, Chennai. 28412415/28412414

Dax Networking : No.11, 2nd Cross St., RK Nagar, Mandaveli. Ch. 28, Next Road To ICICI ATM 24616120 / 22 / 24616521

Dell :  TOLL FREE Number 1800 425 8045 or 46 / 080 2506 8026

Dlink (ALL) :  No.103, 1st Flr. ABC Trade Centre, Devi Theatre Complex,  Old 50, Anna Salai, Chennai-02. 28412207 / 28412206.

Epson Printers : Call For Onsite Service  – Toll Free : 18004250011 / 39001600 98403 01456 /

Gigabyte : – Toll Free 1800 4254945 No.103, 1st Flr. ABC Trade Centre, Devi Theatre Complex,  Old 50, Anna Salai, Chennai-02. 28412207 / 28412206.

HP – Laptops : Maha Electronics, Jeypore Hall # 241, Peters Rd., (Near: Hotel Saravana Bhavan/Satyam Theatre), Chennai, 45960960, 45960900

HP Printers :  Alwarpet : Redington, 550/136, TTK Road, 24354174 // Egmore : Redington, Wellington Estate, Opp Ethiraj College, 28207499

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1TB 2.5″ Portable Bus-Powered Hard Drive

Posted by jimstech on April 6, 2010

Oyen Digital Introduces 1TB MiniPro™ 2.5″ Portable Bus-Powered Hard Drive Series

Saint Paul, MN (PRWEB) April 5, 2010 — Oyen Digital LLC, a leading provider of high-performance storage solutions, announced the release of the newly designed MiniPro™ series of 2.5″ bus-powered portable hard drives. The series includes a 1TB (1.0 Terabyte) model, making it the highest-capacity portable hard drive available. For flexibility and convenience, the MiniPro™ series is equipped with a variety of connection methods including USB 2.0, FireWire 800/400 and eSATA. The series features an attractive rugged housing, measuring 4.9-inches x 0.9-inches x 3.1-inches, using durable aluminum construction for reliable shock protection and heat dissipation.

Oyen Digital’s MiniPro™ is compatible with Windows XP, 2000, Vista and 7 as well as Mac OS 9.2 (and higher) and Linux 2.6 (and higher). All drives include NovaStor NovaBackup 11 (Windows) or Read the rest of this entry »

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Intel 45nm Chip Factory

Posted by jimstech on February 6, 2010

Fab 32 is Intel’s sixth 300mm wafer factory and its second factory to produce 45nm chips. Intel first produced 45nm processors in its Oregon development facility, called D1D, in January and is now moving into high-volume production with the opening of Fab 32. Two additional 45nm, 300mm manufacturing factories are scheduled to open next year in Kiryat Gat, Israel (Fab 28) and Rio Rancho, N.M. (Fab 11x). Using 300mm wafers lowers the production cost per chip while diminishing overall use of resources.

With 184,000 square feet of clean room space, the completed Fab 32 structure measures 1 million square feet, so large that more than 17 U.S. football fields could fit inside the building. More than 1,000 employees will operate the factory in such positions as process, automation and yield engineers and senior manufacturing technicians.

A Focus on the Environment – From the Factory Down to the Transistor

Fab 32 will be among Intel’s most environmentally friendly factories, incorporating a number of energy and water conservation measures that have come to characterize Intel’s long track record of environmental stewardship in its operations.

Intel’s industry-leading 45nm process results in a 15 percent reduction in global warming emissions, and Fab 32 makes use of Intel Arizona’s innovative water conservation and reuse program which conserves more than 70 percent of the water.

The company also announced that it intends to seek certification for the new fab as the company’s first official Leadership in Energy and Environmental Design (LEED) factory based on new criteria being developed for facilities of this kind. LEED is a green building rating system developed by the U.S. Green Building Council that provides a set of standards for environmentally sustainable construction and requires several months of operating data before certification can be completed. The certification would demonstrate that Fab 32 meets the highest environmental standards and reflects Intel’s history of commitment to environmental leadership.

Family of 45nm Server Processors; World-Record Speed

New to the Intel line-up of server processors are 15 server dual-core and quad-core 45nm Hi-k Intel Xeon processors. The 12 new quad-core chips boast clock speeds ranging from 2GHz up to 3.20GHz, with front side bus speeds (FSB) up to 1600MHz, and cache sizes of 12MB. The three new dual-core chips feature clock speeds of up to 3.40GHz, an FSB of up to 1600MHz, and cache sizes of 6MB.

The 45nm Hi-k Intel Xeon processors are compatible with server platforms using the Intel® 5000 chipset family. In addition, Intel is launching three platform solutions to support 45nm processors, including:

  • The Intel® 5400 chipset-based platform (previously codenamed “Stoakley”) that is optimized for high-bandwidth applications such as high-performance computing (HPC).
  • The Intel 5100 Memory Controller Hub chipset and Intel ICH-9R I/O controller (previously codenamed “Cranberry Lake”). These are cost-optimized solutions that support either one or two processors and also provide reduced power consumption using native DDR2 memory.
  • The Intel 3200 chipset-based platform (previously codenamed “Garlow”) that is specifically designed for single-processor entry servers.


Pricing of the 45nm Hi-k Intel Xeon processors depends on the model, speeds, features and amount ordered, and ranges from $177 to $1,279 in quantities of 1,000. The 45nm Hi-k Intel Core 2 Extreme QX9650 quad core processor is priced at $999 in quantities of 1,000.

CLICK HERE,To view about the history of Intel processors

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