68kMLA Classic Interface
This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.
| Click here to select a new forum. | | Recapping PowerBook AC Adapter M5140X 7.5V 2A - caps? | Posted by: bibilit on 2016-10-26 09:10:04
I have repaired another pair yesterday.
After a complete recap, one is working fine and is able to boot properly my Powerbook, while the other is displaying more than 9 volts once plugged, then drops also down to nothing.
I am suspecting the Optocoupler in the side board... have ordered a few.
reference is PC113 and made by Sharp in the first place, i think this part is exactly the same unit used in LC PSUs (and i also have a faulty unit expecting repair)
Will let you know.
| Posted by: bibilit on 2016-12-01 02:14:14
No chance, replaced the optocoupler with a new one, but the PSU is acting the same way, when plugged, the PSU is delivering more than 10 volts, then the output is decreasing gradually, also replaced a Zener at the same time...
Will probably keep it as spare.
By the way, the Powerbook 150 PSU ( i talked about it in another post) made by Delta and not by Sony seems to be more reliable, only one capacitor in the secondary side (Rubycon IIRC and not Elna)
| Posted by: techknight on 2016-12-01 17:48:42
its probably the controller IC.
You should use an isolated scope and check the drive waveform coming out of that puppy.
| Posted by: bibilit on 2016-12-01 23:10:00
Ok, thanks.
| Posted by: desertrout on 2020-07-05 00:08:31
For additional reference, here is the capacitor list and dimensions for the M5140 (APS-20U) - North American version, which appears to be slightly different in its construction from the European version, and the cap at C151 has different ratings:
Position
Capacitance
Voltage
Operating Temperature
Height
Diameter
Lead Spacing
Replacement Part #
C108
47µF
400V
85oC
25mm
16mm
7.5mm
EEU-ED2G470
C111
47µF
50V
105 oC
11mm
6.3mm
2.5mm
493-1896-ND
C151
33µF
35V
85 oC
11mm
5mm
2mm
493-1856-ND
C201
1200µF
16V
105 oC
31.5mm
10mm
5mm
P12367-ND
C202
180µF
16V
105 oC
19mm
6.3mm
2.5mm
493-14370-ND
C207
82µF
16V
not listed
15mm
5mm
2mm
493-1778-ND
C252
1µF
50V
85 oC
6mm
4mm
2mm
493-5954-ND
The part #'s are what I used for a few of these, all in stock at Digi-Key Canada.
| | < 2 |
|