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LC 630 Power Supply Re-cap


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Posted (edited)

I haven't been able to find much in the way of re-capping info for the power supply for the Quadra 630, LC 630, Performa 630 series machines so I'm going to document my progress here in the hopes it ends up helping others.

 

The power supply I have is from a Quadra 630 badged machine. Apple's Service Source document labels the power supply as "661-0170" but the unit I have is actually labeled:

 

Apple Part Number: 614-0037

ASTEC Model Number: AA19300

+5V 80mA continuous

+5V 7.9A

+12V 2.15A

-12V 0.2A

 

Q630-ps-label.jpg.be6126c4813f55670ef030bdde2d4485.jpg

 

Taking apart the power supply is not tricky, unfortunately you do need to de-solder the AC input connector.

 

One side is open, the top is easily removed (two screws):

IMG_1305.thumb.jpg.875cafa02b0392c582e3e923823e5781.jpg

 

Six screws on one side appear to secure the case to heatsinks:

IMG_1306.thumb.jpg.8d0771aab978536352c82536e8653f7b.jpg

 

On one end you need to cut a zip tie:

IMG_1309.thumb.jpg.412f3bdfd1776e6232a09d37a84192e6.jpg

 

There are 3 screws through the board to the bottom that aren't too hard to find.

But the board can't be removed until you take care of the AC input that needs to be desoldered:

IMG_1310.thumb.jpg.2c57354ea5fdaaf7801f6fe3d0f86084.jpgIMG_1311.thumb.jpg.58fb08d3a52852151b2a8a744bfc35de.jpg

 

Next up, capacitor location diagram and info!

 

 

 

 

 

 

Edited by Fizzbinn
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Apple Part Number: 614-0037

ASTEC Model Number: AA19300

 

Electrolytic Capacitor List:

C3 - 390µf | 400WV d:30mm h:48mm

C8 - 22µf | 35V d:6mm h:8mm

C10, C19 - 1000µf | 16V d:10mm h:28mm

C12 - 470µf | 10V d:8mm h:15mm

C14 - 10µf | 50V d:5mm h:12mm

C18 - 1000µf | 35V d:12mm h:30mm

C21, C26 - 3300µf | 16V d:12mm h:40mm

C22 - 2200µf | 10V d:12mm h:25mm

C24 - 220µf | 35V d:8mm h:20mm

C25 - 470µf | 16V d:8mm h:20mm

C40 - 47µf | 25V d:8mm h:8mm

 

 

ASTEC-AA19300-Q630-PSU-capacitors.thumb.png.39b28ce5b4bac8d988cd535714977fd7.png

 

Notes:

The installed C40 capacitor is larger diameter than the board markings would indicate, I'll probably look to replace with a 5mm diameter cap.

The C10 and C14 capacitors are beneath the top of a metal heat sync plate making them a bit more difficult to access but doable.

 

 

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Posted (edited)

Looking closely as the board after removing all the caps not a lot of goo but it looks like a resistor (R44) was getting pretty hot, charred the board a bit and likely cooked C8:

6FAFEEAE-1F4E-4ED3-9654-E85975B13A32.jpeg.6b6017d4428953810f056847de4c50bb.jpeg
 

I’m thinking it might be a good idea to replace with one that has a higher power rating, a bit confused in trying to decode it though:

DD31515C-B849-48E4-A097-E285D7E667A5.jpeg.178a67e317ce4a69de7f7e280facce64.jpeg

 

Red - Teal - Orange - Gold

 

...but I don’t see “teal” as option for 4 stripe resistors, lol. maybe blue or green but the heat faded? I see another similar resistor on the board with a very royal blue stripe, so green maybe?

 

Red - Green - Orange - Gold = 25k Ohms 5% tolerance 

 

Not sure about power/wattages though, thought their would be stripe for that...

 

 

 

Edited by Fizzbinn
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  • 3 weeks later...
  • 68kMLA Supporter

I ordered the following replacement electrolytic capacitors from Mouser:

 

C3 - 390µf | 400WV - d:30mm h:48mm
871-B43545B9397M000


C8 - 22µf | 35V - d:6mm h:8mm
647-USV1V220MFD


C10, C19 - 1000µf | 16V - d:10mm h:28mm
647-UPW1C102MPD


C12 - 470µf | 10V - d:8mm h:15mm
647-UPM1A471MPD1TD


C14 - 10µf | 50V - d:5mm h:12mm
647-UPV1H100MFD


C18 - 1000µf | 35V - d:12mm h:30mm
647-UPJ1V102MHD


C21, C26 - 3300µf | 16V - d:12mm h:40mm
647-UPA1C332MHD


C22 - 2200µf | 10V - d:12mm h:25mm
647-UPJ1A222MHD


C24 - 220µf | 35V - d:8mm h:20mm
647-UPW1V221MPD6TA


C25 - 470µf | 16V - d:8mm h:20mm
647-UTT1C471MPD


C40 - 47µf | 25V - d:8mm h:8mm
647-UTT1E470MDD - Note: d=6.3mm (better fit)

 

 

I couldn’t figure out what to replace that R44 resistor (or maybe it’s an inductor?) with so I decided to leave it alone and hope for the best. 
 

...and after an evening of soldering ....and cleaning ...and triple checking polarities ...and that there weren’t any solder bridges...

 

Success! :)

 

Quadra 630 is back to working order!


632F4D92-DA81-4C35-9792-7F0CA6261D55.thumb.jpeg.fcb182bef96ace8ac1bc9035bdbe2230.jpeg

 

Next up, figure out a retrobrite plan...

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On 4/7/2021 at 6:10 AM, Fizzbinn said:

R44 resistor (or maybe it’s an inductor?)

 

It probably is a resistor; an inductor would probably have an L in its component designation instead of an R.  I've had some resistors that colour, so it's not unprecedented, but I've never had to replace one, so what the colour means I can't help you with :-).

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That looks like a clean recap job — thanks for sharing your documentation with us!

 

I had a Performa 630CD as a teenager that I have a lot of fond memories with.  It's cool to see someone doing thoughtful component-level work on one :)

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