Caple C871i Manual do Utilizador descarregar pdf (Página 375)

100

101

Apple II Computer Info

slime near the base.

If you find something like this, the suspect capacitor should be

replaced by one of the same (or slightly larger) uF value with the same (or

larger) Voltage rating. Size and shape are, also, important in order to get

a good fit.

When removing the bad cap, be sure to mark the "+" side on the board--

use the markings on the cap's cover to identify the "+" side. Install the

replacement cap with its "+" lead in the marked hole.

Messed-up or 'Dirty' Adjustment

The power supply may have a mini-potentiometer mounted on the circuit

board for fine-tuning voltage output. Usually, it will be somewhere near the

end opposite the Switch and will have a slotted plastic 'knob'.

If there is such an adjustment, mark its current position and, then,

turn it back and forth. (If you have some Radio Shack, etc. 'Circuit

Cleaner', into the mini-pot first is a good idea.)

Set the adjustment a bit to one side of the original setting and plug

in the power supply. If it now seems to work the problem was a 'dirty'

voltage adjustment control.

Check the voltage on the +5V line with a meter and adjust it to 5

Volts. (Note: _no_ output due to a dirty adjustment control seems unlikely.

Incorrect output is more probable; and, this could cause a IIe to not work.)

Beyond the above, you are, most likely, looking at a bombed

electrolytic capacitor which is not obviously bad or a blown main power

transistor (the big silvery thing mounted on a heatsink). Unless you enjoy

more involved electronic testing and repair work, your best course is,

probably, to get a replacement power supply.

Rubywand

###################################################### E N D O F F I L E

### power.problems

###################################################### E N D O F F I L E

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 375 of 572

1 2 ... 370 371 372 373 374 375 376 377 378 379 380 ... 571 572

Caple C871i Manual do Utilizador Página 375

Comentários a estes Manuais

Caple C871i Manual do Utilizador Página 375

Comentários a estes Manuais

Manuais e produtos relacionados com Fogões Caple C871i