Sunday, June 20, 2021

Daewoo microwave oven model KOC-9Q5T came in dead now repaired.

 I got a direct message on my Facebook account from a client who wanted her microwave checked by a technician.

 

I gave her my pin location and within an hour she was at my shop via uber.

First I wanted to confirm what the customer said was the symptoms of making noise while warming food but realized the machine was totally dead.

I opened the oven and went straight to the main fuse and found it there but next to it was a huge jumper wire which was also open.

Sunday, June 13, 2021

14 inch LG CRT television dead now repaired.

 I received this television from a customer with dead on arrival symptoms, I checked the main fuse and found it okay.

I tested the HOT transistor and found it okay, next I pulled my ESR meter and begin testing esr for all big filter capacitors on the secondary side and bumped on one which has esr reading very high, actually around 150 ohms.

The capacitor was rated 47uF/160V, this is the capacitor which filters the B+ voltage.

Thursday, June 3, 2021

LG home theater model LHD657 came in with S-protect symptoms now Repaired!

 I received this machine with the above symptoms in my shop a few days ago, I opened the machine and went straight to the audio amplifier which from my experience is the major cause of this error.

Friday, May 21, 2021

LG 32-inch CRT television dead now repaired

 I received a phone call from a client who wanted his television checked.

I requested him to bring it to my shop so that we can check it out.

Within thirty minutes he arrived at the shop, according to him the television was hit by power surge but when I opened it I did not see any sighs that it was power surge related issue.

I scanned the board top side and I did not get any suspect component.

I turned the board to the bottom side and noted numerous dry joints and one component burnt as you can below.

Friday, May 14, 2021

Sony Home theater model HBD-DZ950 hit by power surge now repaired.

I got a phone call from a client who wanted his machine checked by a technician.

He told me that he just googled technician nearby and my name popped up.

I asked him the nature of the problem and item to be checked, He said he suspect power surge since the home theater and microwave are dead.

I asked for the model of the home theater so that I can prepare myself in advance.

The machine model was the Sony HBD-DZ950, I logged on the net looking for the service manual of this machine so that I can be able to figure out the most likely culprits and value.

I was lucky to get the manual and went straight to the power supply section and was able to pick out the possible culprit which normally fail if there is power surge.

I picked the components from my store and headed to the client site which was around 20Km from my place, using the pin location provided, I was able to locate the place effortlessly.

I was ushered in and shown the machine, after opening it I could see the damage done by the power surge without even pulling the meter.


Monday, May 3, 2021

14-inch CRT television with messed up colors, no sharpness now repaired

I received a phone call from a client who wanted his television checked.

I arrived at the site and shown the television, looking at the screen one can see the pictures but pink color was too much and also the image was not sharp, any writing on the screen was not visible and looked like washed out.

I took the television to the shop and the first stop was the small CRT neck board shown below.

Saturday, April 17, 2021

Hisense 65-inch not loading(hanging) now repaired.

I got direct message on my FB account from a lady who wanted her television checked.

By the way we are not friends on FB but mutual friends and one of his friends complained about how is new television is misbehaving, I dropped a comment there and when this lady read my feedback she thought I can help in her case.

After contacting me we organized for the appointment for the site visit.

She provided her pin location and was able to reach her place effortlessly.

I was shown the television and I tried to reset (which the medical people call resuscitation) all in vain.

I went online and googled the model number then motherboard and I got the part was available at Aliexpress.com

I asked her if she was comfortable with board price and she agreed.