Power Supplies: Difference between revisions

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For FCC info [[FCC regulations|click here.]]
==Letting out the magic smoke==
I have seen many eBay listing stating something like the following:
* "Was testing this and it randomly shorted out."
* "Plugged it in seemed to work then it went Pop and didn't work anymore."
One time I even saw this picture:
{|
|-
|
[[File:Letting out the magic smoke.jpg|400px]]
|}
99% of the time it is likely that the RIFA filtering caps blew in your machine.  This is very likely if the machine has not been serviced in a long time.  Use this page and my "A note about Filter Caps" on the page [[FCC regulations]] to address this problem.
==Mounting Notes==
The earliest Kaypro Power Supplies were mounted with the connector on the left side as you look from the front or upside down to most of us.
At somewhere between #4222 and #7954 the board was flipped so that the connector was on the right side.
{| class="wikitable"
|+ Left verses Right Connectors
|-
| #4222 and Earlier || #7954
|-
|
[[File:Left Power supplies.jpg]]
||
[[File:Right Power supplies.jpg]]
|}
==Harness Notes==
The wiring harness on the very early machines appears to have all white wires on the 10 (or 9) pin connector.  This appears on the #2767 and #2775, but my #3590 has black, white, red and green wires as does every later machine does.
{| class="wikitable"
|-
| #2767<br> Photo From Thomas Brase || #2775 || #3590
|-
|
[[File:2767 harness.jpg]]
||
[[File:2775 harness.jpg]]
||
[[File:3590 harness.jpg]]
|}
==Cal DC==
==Cal DC==
{|
{|
Line 6: Line 51:
|In my earliest Kaypros I have the blue board CalDC boards
|In my earliest Kaypros I have the blue board CalDC boards
|-
|-
| [[File:CalDC1.jpg|thumb]] || No RIFAs on these boards || [[File:CalDC1 label.jpg|thumb]]
| [[File:CalDC1.jpg|thumb]] || No RIFAs on these boards<br>Ceremaic Disk Capacitors provide EMI Filtering<br>C1 has 2 0.1microFarad Z caps 500V<br>C2 and C3 are 2200 picoFarad 3000V Y5U<br>C4 has a single cap that matches those in C1  || [[File:CalDC1 label.jpg|thumb]]
|-
|-
| [[File:CalDC1 jumpers.jpg|thumb]] || #2775 - 037085 <br> #3590 - 039421 <br> #4207 - 040864 <br> #4222 - 040858
| [[File:CalDC1 jumpers.jpg|thumb]] || #2775 - 037085 <br> #3590 - 039421 <br> #4207 - 040864 <br> #4222 - 040858
Line 12: Line 57:
|'''Cal DC LR5301-03 "Clear"''' <br> (Note that there is a slightly different board layout)  
|'''Cal DC LR5301-03 "Clear"''' <br> (Note that there is a slightly different board layout)  
|-
|-
| [[File:CalDC1 Clear.jpg|thumb]] || No RIFAs on these boards || [[File:CalDC1 Clear Label.jpg|thumb]]
| [[File:CalDC1 Clear.jpg|thumb]] || Early ones have ceramic caps in C2-4 <br> #21460 has 2 2200pF Ys (C2 and C3) (Lead space requires bending leads) and 0.22microF X2 (C4) || [[File:CalDC1 Clear Label.jpg|thumb]]
|-
|-
| [[File:CalDC1 Clear Jumpers.jpg|thumb]] || #12654 - 48859 <br> #15453 - 50863
| [[File:CalDC1 Clear Jumpers.jpg|thumb]] || #12654 - 48859 <br> #15453 - 50863 <br> #21460 - 53810
|-
|-
| '''Cal DC 2'''
| '''Cal DC LR5301-15 Labeled on Transformer''' Note:65W
|-
|-
| [[File:CalDC2.jpg|thumb]] || [[File:CalDC2 rifa.jpg|thumb]] || [[File:CalDC2 label.jpg|thumb]] ||
| [[File:CalDC2.jpg|thumb]] || [[File:CalDC2 rifa.jpg|thumb]] || [[File:CalDC2 label.jpg|thumb]] ||
|-
| '''Cal DC LR5301-15 Labeled on Capacitor''' Note:85W
|-
| [[File:Cal dc3 288536.jpg|thumb]]
|| [[File:Cal dc3 rifa 288536.jpg|thumb]]
|| [[File:Caldc 3 label 288536.jpg|thumb]]
||
|-
|
[[File:CalDC3 rifa.jpg|thumb]]
| #288536 - 9003067
|}
|}
<br>
<br>
Line 33: Line 89:
| '''Boschert XL53.3601R "Green"'''
| '''Boschert XL53.3601R "Green"'''
|-
|-
| [[File:Boschert1.jpg|thumb]] || [[File:Boschert1 Label.jpg|thumb]] || #7954 - HL 2676 (83/09)<br>#16288 - HH 0074 (82/49)
| [[File:Boschert1.jpg|thumb]] || [[File:Boschert1 Label.jpg|thumb]] || #7954 - HL 2676 (83/09)<br>#16288 - HH 0074 (82/49)<br>#17083 - HH 0856 (82/51)<br>#20250 - HH 3369 (83/01)
|-
|-
| For Both Boschert XL53.3101R & XL53.3601R  
| For Both Boschert XL53.3101R & XL53.3601R  
Line 43: Line 99:
|-
|-
| [[File:Boschert2.jpg|thumb]] || [[File:Boschert2 rifa.jpg|thumb]] || [[File:Boschert2 label.jpg]]
| [[File:Boschert2.jpg|thumb]] || [[File:Boschert2 rifa.jpg|thumb]] || [[File:Boschert2 label.jpg]]
|-
| [[File:Boschert 50 & 60 chart.jpg|thumb]]
[[File:Boschert XLFamily chart back.jpg|thumb]]
|}
|}
<br>
<br>
Line 53: Line 112:


==Astec==
==Astec==
=== Astec AA 12350 ===
{|
{|
|-
|-
| [[File:Astec1.jpg|thumb]] || [[File:Astec1 rifas.jpg|thumb]] || Label || Text
|
[[File:Astec 12350 full board.jpg|thumb]]
||
[[File:Astec 12350 RIFA.jpg|thumb]]
||
[[File:Astec 12350 label.jpg|thumb]]
|-
|
[[File:Astec 12350 old rifa.jpg|thumb]]
||
C13 - 0.01microF (Lead Spacing 1.45/1.21) C-G<br>
C1 - 0.01microF (Lead Spacing 1.45/1.78/2.08) N-L<br>
C2 - 0.1microF (Lead Spacing 1.45/1.78/2.08) PT N-L
|| #57145
|}
Appears to be related to the Astec AA12090 for an TRS-80
 
=== Astec AA 12450 ===
{|
|-
| [[File:Astec1.jpg|thumb]] || [[File:Astec1 rifas.jpg|thumb]] || [[File:PSU Tag 79763.jpg|400px]]
|-
| [[File:Astec1 Rifas.jpg|150px|thumb]] ||
C2 - 0.1microF (Lead Spacing 1.45/1.78/2.08) PT N-L<br>
C1 - 0.01microF (Lead Spacing 1.45/1.78/2.08) N-L<br>
C13 - 0.01microF (Lead Spacing 1.45/1.21) C-G
|-
|-
| [[File:Astec2.jpg|thumb]] || [[File:Astec2 rifa.jpg|thumb]] || [[File:Astec2 Label.jpg]] || Note the change in position for the one cap of the 4 on the right side.
| [[File:Astec2.jpg|thumb]] || [[File:Astec2 rifa.jpg|thumb]] || [[File:Astec2 Label.jpg]] || Note the change in position for the one cap of the 4 on the right side.

Latest revision as of 22:38, 4 August 2025

For FCC info click here.

Letting out the magic smoke

I have seen many eBay listing stating something like the following:

  • "Was testing this and it randomly shorted out."
  • "Plugged it in seemed to work then it went Pop and didn't work anymore."

One time I even saw this picture:

99% of the time it is likely that the RIFA filtering caps blew in your machine. This is very likely if the machine has not been serviced in a long time. Use this page and my "A note about Filter Caps" on the page FCC regulations to address this problem.

Mounting Notes

The earliest Kaypro Power Supplies were mounted with the connector on the left side as you look from the front or upside down to most of us. At somewhere between #4222 and #7954 the board was flipped so that the connector was on the right side.

Left verses Right Connectors
#4222 and Earlier #7954

Harness Notes

The wiring harness on the very early machines appears to have all white wires on the 10 (or 9) pin connector. This appears on the #2767 and #2775, but my #3590 has black, white, red and green wires as does every later machine does.

#2767
Photo From Thomas Brase		 #2775 #3590

Cal DC

Cal DC LR5301-03 "Blue"
In my earliest Kaypros I have the blue board CalDC boards
No RIFAs on these boards
Ceremaic Disk Capacitors provide EMI Filtering
C1 has 2 0.1microFarad Z caps 500V
C2 and C3 are 2200 picoFarad 3000V Y5U
C4 has a single cap that matches those in C1
#2775 - 037085
#3590 - 039421
#4207 - 040864
#4222 - 040858
Cal DC LR5301-03 "Clear"
(Note that there is a slightly different board layout)
Early ones have ceramic caps in C2-4
#21460 has 2 2200pF Ys (C2 and C3) (Lead space requires bending leads) and 0.22microF X2 (C4)
#12654 - 48859
#15453 - 50863
#21460 - 53810
Cal DC LR5301-15 Labeled on Transformer Note:65W
Cal DC LR5301-15 Labeled on Capacitor Note:85W
#288536 - 9003067



From the Tech Manual for switching to 220V: Identified by a bright blue circuit board. A white sticker with "California DC", model, and serial number is located on solder side of board.
There are two ceramic power resistors in the upper right-hand corner of the board. These resistors get quite hot during operation. Wiring should be tied down AWAY FROM THESE COMPONENTS.
Locate a jumper block labelled 115VAC and 230VAC. With the jumper in the 115VAC position the board is configured for 110V.
Remove the jumper from the socket labelled 115 VAC and replace it in the socket labelled 230VAC. The power supply is now configured for 220V use.

Boschert

Boschert XL53.3101R "Clear"
#8409 - MBO 9876 (82/43)
#12275 - MBO 3773 (82/48)
Boschert XL53.3601R "Green"
#7954 - HL 2676 (83/09)
#16288 - HH 0074 (82/49)
#17083 - HH 0856 (82/51)
#20250 - HH 3369 (83/01)
For Both Boschert XL53.3101R & XL53.3601R
Original RIFA Caps:
1-0.22 microFarad X and 3-4700 picoFarad X (both 250V)
I would suggest replacing the 4700 picoFarad X Caps
with Y2 for safety reasons
Boschert XL60.3601R



From the Tech Manual for switching to 220V: Identified by the word "Boschert" on the component side of the board at lower right and above the fuse and capacitor C2. Locate a six-inch wire that is soldered to point JP1. If the board is configured for 110V, the other end of the wire is attached to point E1 (labelled 110V). Unplug the wire from point E1 and plug it into E2 (labelled 220V). Point E2 is to the left of point E1. The power supply is now configured for 220V use.

Astec

Astec AA 12350

C13 - 0.01microF (Lead Spacing 1.45/1.21) C-G
C1 - 0.01microF (Lead Spacing 1.45/1.78/2.08) N-L
C2 - 0.1microF (Lead Spacing 1.45/1.78/2.08) PT N-L

#57145

Appears to be related to the Astec AA12090 for an TRS-80

Astec AA 12450

C2 - 0.1microF (Lead Spacing 1.45/1.78/2.08) PT N-L
C1 - 0.01microF (Lead Spacing 1.45/1.78/2.08) N-L
C13 - 0.01microF (Lead Spacing 1.45/1.21) C-G

Note the change in position for the one cap of the 4 on the right side.



From the Tech Manual for switching to 220V:

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