Photos in Fotolog.

Welcome to Fotolog.
Here you can view and share all your photos with friends throughout the world.
Foto log is a community sharing website.
Of course you can make lots of friends.
I just got an idea.
I am going to test it out now.
Let you know later.
bye .
oh ya... here's the link to view the video on Fotolog.
Happy viewing.
click here to view.

Sencore Horizontal Output & Flyback Analyser.

To all Electronics Techs and Electronics Engineers out there.
I have good news for you.
As age is catching up with me, I have decided to close down my repair workshop.
I do have some used electronics equipments up for sale as I no longer need them.
Here you see a Sencore Horizontal Output & Flyback Analyser.
Model: HA325
It is still for sale at: Sencore.com
It is in good working condition.
Read more info here.
contact me for more info at: skyyes189@gmail.com
I do have a few more electronics equipments for sale.
More at www.fatnthin.com

Monitor Parts.

Nowadays there's less and less of this type of bulky vacuum tube computer monitors in the market. It looks like it is going off to the landmines forever. The new fashion LCD monitors are here to stay.
What's the difference between these two types of monitors? They do and work the same function. So why the change? The new types of LCD monitors may be slim but the colors cannot match the tube types.
It may take up less space on your desk but the brightness is not as bright as the tube ones.
It may consume less electricity to operate but you wont get a good view from an angle.
All in all, it is still expensive in cost.
Then what about the maintainance, is it low compared to the former?
What if it breaks down, can you get a local technician to get it fixed in an hour or two?
It is considered new technology in the poor countries.
Most people still cannot afford to own one.
No wonder I do still have lots of customers sending in the tube displays for repairs.
I still wonder when they will be completely out of sight.
Then the technicians involved will all have to change their line of work.

How I repair a PERX 17inch monitor.

This is the first time I come across this brand monitor.
The model is 17M121B
I believe it is made in CHINA.
There's no power indicator outside the panel.
When I applied power, I can hear a soft tic tic sound.
Opening up the cover, I noticed it has a samsung mother board attached inside.
The power supply ic is DP704c.
The horizontal output transistor is C4997
The voltage on the reservoir capacitor seems right at 318voltdc.
Found voltage at the secondary seems to be fluctuating.
Further checks shows that the horizontal output transistor shorted.
Replacing it seems to solve the problem.
Put it on soak test for a day and it seems working fine.
Sometimes we need to change only one component.
I will put up a link for component testings soon.
It will on my main website.

HP monitor model : 5500 with only yellow color.

Today we had this same model HP monitor with only yellow color.
So what happened to the rest of the colors?
Now since this HP monitor is the same model, I do not want to upload the pictures again.
So let's just do the troubleshooting here.
Now what is usual faults about this HP monitor?
Since it is already in use for a couple of years, there is difinately some dry solder joints,
weak cables or hardened data cables attached to this HP monitor.
My favourate would be to give a couple of slight knocks on the monitor itself.
Just as lucky as before, it is really caused by dry solder joints, but where?

So we began to strip down the monitor casing after removing a few screws.
For color problems, dry joints are usually occurred at the picture tube pcb board.
It is a small pcb board attached to the picture tube itself.
Looking closely, we notices that there are alot of dry solder joints around the pcb board.
Here, we did a round of resoldering to all the loose points/joints.
Before assembling back the monitor cover/casing, we applied a number of knocks on the pcb board to ensure there's no more dry solder joints.
So it's another easy job for us.

Do visit my website for more troubleshooting monitor repair tips.
I will post often.
Do enjoy your repair works and take special care when troubleshooting with supply on.

Before opening it's cover, we tested the press button switches at the front panel.

All buttons function perfectly except for the horizontal size.

With some slight knocks on the monitor, we noticed the display changes.

Display becomes perfect on and off.

This shows that there are dry joints on the solder boards.

Notice that there were some black patches on the board.

We then procede to resolder all the dry joints visible.

Further testing shows display perfect.

No pincushion anymore.

Button for horizontal size functions perfectly.

Display comes back normal.

Notice that there were some black patches on the board.

We then procede to resolder all the dry joints visible.

Further testing shows display perfect.

No pincushion anymore.

Button for horizontal size functions perfectly.

Display comes back normal.