Monday, 9 February 2015

Repair my Macbook Unibody (late 2009) 60W Magsafe charger

From October 2009, till now, I have fixed (maybe some of it cannot be called real repair) my Macbook countless of times on my own. These includes replace the screen due to the cracked, changing/repalced my hard drive many times, replace and also upgrade memory RAM, and most of it are the Magsafe charger.


I am not sure why, but, my magsafe always have thermal dissipation problem and generate heat more than it should when in use. Magnetic connector that attached to the Macbook  get warmer/hotter when I am charging for hours during the longer usage. Even, the magsafe converter (big white square thing) sometimes getting hot too.

magnetic connector separated from supply cable due to excessive heat.

magnetic connector and pins separated from cable

by remove two lock pins,  plastic that hold supply pins can be detached

supply pins plastic holder detached from magnetic connector.

circuit for magsafe dc supply


insert pin into plastic holder and solder it.

using clamper is easier to solder



TESTED WORKING
you can verify the charger by charging your mac

repaired charger are verified and working.


NOW, NEED TO REDO THE OUTER COSMETIC TO MAKE SURE ITS DOES NOT BROKE AGAIN.

insert sumi tube

use plyer to tighting the connector cover into the magnetic 

attach the sumi tube to the cover

heating up the sumi tube to shrink the rubber tube

tada...final result!!!
So, instead of throwing broken charger into the bins, I think, why not we try to fix it. If its work, we will save money and also saving the earth by recycling the product. Cheers

Tuesday, 13 January 2015

CHANGING REAR BRAKE PAD OF W203 MERCEDES C180K

THIS IS STEP BY STEP HOW TO CHANGE THE REAR BRAKE PAD FOR MERCEDES-BENZ W203 C180 KOMPRESSOR FACELIFT MODEL. IT IS VERY EASY JOB. IT IS BASED ON MY EXPERIENCE.

FIRST YOU NEED TO MAKE SURE THAT YOU HAVE ALL THE TOOLS AND EQUIPMENT REQUIRED.
1)flat screw driver (Fig 3)
2)hammer and nail (Fig 3)
3)new rear brake pad (fig 1).
4)brake cleaner
5)clamp
6)2 ton jack (Fig 2)
7)brush
8)anti-seize


THEN, PLEASE FOLLOW THESE STEPS;
1) remove/install wheel, rotate if necessary (Fig 3)
2) using nail and hammer, hammer out the retaining pin and remove retaining spring (Fig 4, Fig 5)
3)using flat screw driver, pull/push the brake pad outward to release the brake piston pressure (fig 6).
3) pull brake pads out of brake caliper.
4) check brake thickness and brake disk and inspect the condition, replace if necessary,
5) clean the contact surface of brake caliper using brush
6) and install new brake pad in reverse order.


Fig1: W203 C180K REAR BRAKE PAD
Fig 2: car jack

Fig 3: open nuts and remove wheel
Fig 4: w203 c180k retaining pin and retaining spring need to be remove from brake caliper
Fig 5: Retaining pin and retaining spring

Fig 6: W203, after retaining pin is removed, pull/push the old brake pad using flat screw driver to release the brake piston.


Fig 7: w203 rear, old and new brake pad


**This guide is based on my experience changing brake pad myself and will be improve from time to time. Any suggestion/comment to the procedure, please comment below.


Monday, 12 January 2015

KENWOOD PROSPERO KM280 NOT WORKING..WHY?

Hi, Peace upon you all..

This afternoon, my wife food processor kenwood km280 suddenly dead..she planned to prepare Dorayaki for us all, to eat in the evening.

Fig 1: kenwood KM280 mixer / food processor
Unfortunately, after pours mix all the ingredient into the bowl, switch On the main plug and adjust switch knob to no 1 speed, nothing happen. After many tried, after referred to the manual that comes with this food processor (KM280), she gives up and ask me to do something about it.

First step to troubleshoot the problem is to check the power from the main plug and also the fuse. The outcomes are all well and working fine.

Second, check the internal connection and gearing, visually. the reason are to make sure no visible damage to the cable and gearing. This will require disassembly of top cover.Its can be done by removing six screws under.

after top cover are removed, internal circuits, motor and gears (figure below) can be observe for any damage. Fortunately, there nothing obvious to the gearing and motor (refer to fig 2, fig 3 and fig 4)
Fig 2: internal circuitry, safety switchs, motor and gearing of KM280

There are three safety switches in this KM280. One is for latch switch (located on the left side of KM280) to lift Top side of KM280 up and down, to remove and install the bowl and beaters. This seem fine to me too. Checking using multimeter show continuity when it locks to the position.
Fig 3: Mixer gearing of KM280

The other two safety switches located near blender holder-high speed outlet (fig 4) and near the food processor holder-medium speed outlet (fig 2, middle left in the pic).
Fig 4: high speed outlet gearing and safety switch of km280
 And both also looks fine, visually and testing with multimeter (continuity test) showed the switch working as it should.

Considering that all possible culprit are tested fine. So, I power On the KM280 again with both top safety switch are pushed by hand...and the result is it working.

Attaching the medium speed outlet cover and high speed outlet cover also make the KM280 works.
However, when I attached the blender to the high speed outlet, and turn the knob on, this time KM280 is not working.

So, now I know where is the problem coming from. Looking at the bottom side of the blender..there is the white plastic stick that will push the safety switch when blender is attach to the high speed outlet. This white stick is link all the way to the top of the blender and require the cover to be attach properly
Fig 5: Blender jug. Bottom side with stick that will push the safety switch
 Turn out, my wife did not close the blender cover properly as on fig 6. Thus, causing the white stick to lift up slightly. This will result in open circuit to the motor supply and KM280 will not able to operate. This also cost me half an hour to check the faults.
Fig 6: blender jug. Top side with the cover. Arrow should align with the handle
Therefore, it is best to check and verify all the possible fault before throwing it out or sending to the repair man which will cost you a lot of money. Luckily,in my case, there are no faulty to the KM280..its just been handles wrongly.

Hope this will guide anyone who have similar problem. Thanks

Tuesday, 30 December 2014

ACER ASPIRE IDEA 500 POWER SUPPLY PROBLEM (FSP120-40GLS)

Hi, its has been 3 years that my acer aspire idea 500 power supply broken (not working). since the replacement power supply is difficult to find in here (Malaysia), I have to modified the supply cable on the connector to match my aspire idea power supply (PS).


old bulky PS

aspire idea with old PS which sits outside my media center
 the original replacement is about £50 now at UK..While, here in my home country, no chance to find it. so, I have to find alternative way to make my idea 500 working. 

one way was to use old power supply (twice the size of its original PS) and rearrange it cables to PS connector to suit the idea 500 supply. That was done (and working) 3 years ago.
these pins used for removing the cable from old PS connector for rearrangement


Recently, I managed to get some courage to open my dusty aspire idea 500 original PS casing to find out the source of the problem.

120W original aspire idea 500 PS model FSP120-40GLS
 In there, I found several bulking and leaking capacitor which could be the main supply problem.
with little bit of soldering skills, I replaced the capacitor (20 pence each = RM1 each)


internal view of idea 500 PS after capacitor replace

damaged capacitor
after that, my aspire idea 500 PS are working again inside acer aspire idea 500. with a lot of saving from buying the new PS.


Chow.....

TRY TO FIX MY WIFE VINTAGE BROTHER SEWING MACHINE

hi, this is our classic Brother electric sewing machine. it is very old. But, still works fine. Model is similar to 681B-UG




Unfortunately, for the past few weeks, there are little problem with the foot pedal which caused slight leakage current when operate the machine. was not sure where the problem coming from. but, I try to investigate using my little knowledge about this kind of thing.

At first, I am looking at the basic things like connection inside the main plug, cable that connect from main plug to the machine, whether any damage have been occur or not to its insulation/disconnect etc. However, nothing have been found

So, I start to disconnect the cable that connect to the motor and light via white connector to identify the problem..what I found is one of the ground cable are damaged. This caused disconnect between Earth cable from main plug and the machine body.

after realised that issue and fix the connection. 
Then, I the got problem to reconnect the cable after fixing the earth issue. 
Twice tripping my house ELCB in main board supply. After that, I have to tracing the circuit in sewing to make sure my connection are correct....

and here you go,...


Circuit diagram for the Brother sewing machine


I prepared the layout circuit diagram for my Brother sewing machine..Hopefully, these will help anyone that having the similar problem on this similar machine.

Thank you very much


Thursday, 19 September 2013

Why I choose Nokia 101 over Nokia N9?

kenapa aku pilih Nokia 101 berbanding Nokia N9? jawapannya...

Sejak nokia N9 aku rosak, walaupun aku dah repair sendiri semula, tetapi keinginan untuk guna HP tuh balik dah takde..sebabnye,aku dah jatuh cinta semula ke HP yg simple macam zaman dulu2.


Nokia N9


mase nokia N9 tuh rosak, aku guna Nokia 101 sebagai ganti, kononnye untuk sementara waktu la, tapi, akhirnye macam nak teruskan guna, dan nokia N9 maybe just guna untuk navigation saje.


Nokia 101


dibawah aku listkan perbandingan dalam bentuk table. Walaupun, hasil akhirnya adalah draw. tetapi, some of the application seperti WhatsApp, calendar dan contact, bagi aku takdelah penting sangat. jadi takla ralat sangat.

Cume yang paling aku missed sekali adalah camera function sebab, aku ni jenis suka snap picture biler buat sesuatu keje berkaitan technical (untuk record). jadi, yang ni membuatkan aku rase sedikit kehilangan sejak guna Nokia 101.



Apepun, rasenyer semua bergantung kepada selera masing2, bergantung kepada preference individu masing. Macam aku yg dah tua ni, mase aku takde la banyak sgt denagn HP, jadi, HP apepun pun dah tak kisah, janji boleh call dan mesej. tu sajer kot.

korang pulak macam maner?

Wednesday, 18 September 2013

My mobile phone history

*sejarah telefon bimbit aku.

tengah terbaring2 kat bilik mase tidokan anak2, tiba2 teringatkan kisah2 lama pasal mobile phone aku. mula la mengimbau kembali zaman sejak dari mula-mula beli first HP 13 tahun yang lalu, sehingga la sekarang. dan bila dipikirkan balik, hampir semua HP yang aku guna adalah dari brand nokia.

kenangan aku menggunakan HP bermula biler pertama kalinya duit PTPTN aku masuk. maser tuh mcm org gila sebab tak penah pegang duit yang banyak. jadi terus beli HP 3120 spt dibawah nih. 

Tapi, aku guna HP 3210 kejap jer sebab kesian kat bapak aku. yela, takkan anak ade HP, tapi bapaknye takde..kan tak patut tuh.

akhirnya aku bagi jer kat bapak aku sebab bapak aku takde HP lg maser tuh. Yela, takkan anak nak potong line pulak kan? HP ni aku aku sempat guna sebulan jer.

Nokia 3210 (2000 from new, used for 1 months,gave to dad)


dan seterusnya tengok jer la gambar2 HP2 berikutnya yang aku penah guna termasuk sedikit komen dan historynya.


Ericsson T28(2000 from new, 3 months, stolen in the mosque)


Nokia 3310 (2001 to 2005, second hand, broken)


Nokia 3210 (2005 to 2006, second hand, broken)

Nokia N-Gage QD (2006 to 2007, second hand, sell, )


Nokia 6110 Navigator (2007 to 2011, new, lost April 2011)


Iphone 1st generation (2008 to 2009, sell it middle 2009 because of getting bored with the phone)


Nokia N900 (early 2010 to Nov 2011,new, Sell it)


Nokia N9 (Nov 2011 till Now, new, unused)


Nokia 101 (Jan 2012 till Now, from new, still used)

akhirnya kembali kepada HP yang basic semula..dan actually, aku rase lebih selesa sekarang berbanding guna HP yang canggih2 sebelum nih..