What do you get out of an Arise Monitor with no power.
Scrap it or use it for future spare parts or repair it for as a spare set.
Well, I was thinking of stripping it apart. Dump the picture tube away.
Keep all the parts as spares components.
Then when I think of all the time involved in doing so, I might as well try to repair it.
OK....
Opened up the back cover and given it a quick look at the board.
Looks very clean inside.
So I decided to take out my multimeter as usual.
Firstly I will check if there's still any remaining voltages at the reservoir capacitor in the power supply as I do not want to get a nasty shock.
Good...2volts dc only.
Inspected the fuse, looks good but I did test it with my faithful fluke multimeter.
There's continuity....means it is still good.
Then measured the primary windings of the switch mode power supply transformer with the Dicksmith meter.
All leds lighted.
Good.... no shorts in the secondary side.
Then I go straight to the flyback transformer.
Also measured the primary windings with the Dicksmith meter.
This time there's only 2 leds lighted.
This shows there's a shorted component or components at the secondary side.
Next, I used my Fluke multimeter and tested the horizontal transistor.
Found it shorted on all 3 pins.
Desoldered it out and tested it again.
Sure enough it shows all rounds shorted.
Replaced with a new transistor restored the display.
Tuesday, February 26, 2008
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