Power Macintosh (Performa) 5500/250

From Caps Wiki
Revision as of 02:52, 27 December 2024 by JohnTheMan (talk | contribs) (Added to computer category.)
Jump to navigation Jump to search
For more information, see this article's corresponding Wikipedia page: https://en.wikipedia.org/wiki/Power_Macintosh_5500.

For additional information, see the article on Everymac.com: https://everymac.com/systems/apple/powermac/specs/powermac_5500_250.html#macspecs2 Many great images on Oldcrap.org: https://oldcrap.org/2019/02/17/power-macintosh-5500-225/

Power Macintosh (Performa) 5500/250
Preliminary Information
Release Year 1997
Leak Risk High
Batteries Removable
Mounting Technology Through Hole, SMD
Capacitor Types Aluminum Electrolytic, Tantalum
Destructive Entry No
Hardware Specifications
CPU PowerPC 603e (250Mhz)
Memory Capacity 32MB, expandable to 128MB
Storage CD-ROM, 3.5in FDD, 2GB IDE HDD
Graphics ATI 3D Rage II (2MB) (Integrated)
Display Interface Internal 15in RGB CRT, optional composite/S-VIDEO out
Sound Integrated 16-bit Stereo
Power Requirements
Input Voltage 100V-240V, 50hz-60hz
Current (Amps) Rated 4A
Power Connector IEC 60320 C13, standard.

The PowerMac 5500/250 was released in 1997 as an all-in-one machine, predating the term "iMac". At first, this model was only sold in Japan, Australia, and U.S.A. education facilities. It later entered the wider U.S.A. by popular interest. This computer, as are most PowerPC Macs, has a plastic chassis that doesn't age well. Be careful when handling, the plastics have become very brittle. This computer is strongly related to other 5500 models Macs, and the 5400 series. This model of 5500 shipped with an Ethernet card, video input, and NTSC output. This computer commonly goes by "PowerMac" and "Performa", so try not to get confused on the internet.

This machine was designed from a "Service Friendly" point of view. It is easy to remove many of the parts from this machine. But if you decide to perform a full teardown, you may find great difficulty. Take note and pictures of how cables should be positioned.

This machine has two revisions for the analog boards. They are not compatible, and feature different capacitors. This for sure applies to the supply board, but more info is required to determine this in the CRT neck board and flyback board.

Known Issues

Symptom or Problem Encountered

The machine powers on, but the screen does not light and there is no dong. The heating element in the CRT does not glow. 12v rail reads fine, but no other.

Causes

  • Aged capacitors, possibly blown diodes on motherboard.

Solutions

  • Recap, and replace suspected diodes.

Disassembly Notes

This computer, similar to most PowerMacs, features a plastic that does not age well. All plastic in the system, especially the chassis, is very brittle. Do not force removal of plastic.

The rear of the computer has an IO door. Remove three (3) screws and gently lift the two (2) plastic snaps on the bottom of the computer.

There are six (6) screws behind the CRT lip of the chassis. Two are out of view. Once removed, the front bezel comes off. If the IO door is also removed, the rear chassis comes off.

Behind the IO door, there is a springy metal bar. Flip and down and pull to remove the motherboard. (Check for a purple heatsink).

The battery is a 4.5v alkaline, powering the PRAM. Nothing special. Replace with three (3) AAs or AAAs in series. Or track down a 4.5v battery. Likely required to boot.

There are capacitors on the Microphone board, and the front buttons board.

Original Parts

2nd Rev. Supply Board (SH-SH7 94V-0^, 6870T032C11)

Note: A few capacitors are encased by a heatsink. One heatsink must be removed to access them. In this process, you will also have to desolder two (2) voltage regulators. One with four (4) pins and the other with five (5) pins.

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
1 10 µF 50v Thrgh-Hole Electrolytic
1 22 µF 16v Thrgh-Hole Electrolytic
1 22 µF 50v Thrgh-Hole Electrolytic
1 33 µF 200v Thrgh-Hole Electrolytic
2 47 µF 16v Thrgh-Hole Electrolytic
2 47 µF 25v Thrgh-Hole Electrolytic
1 47 µF 50v Thrgh-Hole Electrolytic
2 47 µF 100v Thrgh-Hole Electrolytic
1 47 µF 160v Thrgh-Hole Electrolytic
1 100 µF 100v Thrgh-Hole Electrolytic
1 220 µF 10v Thrgh-Hole Electrolytic
1 220 µF 16v Thrgh-Hole Electrolytic
1 220 µF 25v Thrgh-Hole Electrolytic
1 330 µF 25v Thrgh-Hole Electrolytic
1 470 µF 10v Thrgh-Hole Electrolytic
1 470 µF 25v Thrgh-Hole Electrolytic
1 560 µF 400v Thrgh-Hole Electrolytic
4 1000 µF 16v Thrgh-Hole Electrolytic
3 1000 µF 25v Thrgh-Hole Electrolytic
1 2200 µF 25v Thrgh-Hole Electrolytic
1 3300 µF 25v Thrgh-Hole Electrolytic
1 6800 µF 10v Thrgh-Hole Electrolytic

2nd Rev. (?) Flyback Board (340-323A, 805-1841-08, 6870T032A21)

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
2 0.22 µF 50v Thrgh-Hole Electrolytic
3 1 µF 50v Thrgh-Hole Electrolytic
1 1 µF 160v Thrgh-Hole Electrolytic
1 10 µF 50v Thrgh-Hole Electrolytic
3 22 µF 16v Thrgh-Hole Electrolytic
1 22 µF 50v Thrgh-Hole Electrolytic
2 33 µF 16v Thrgh-Hole Electrolytic
2 47 µF 16v Thrgh-Hole Electrolytic
2 47 µF 25v Thrgh-Hole Electrolytic
2 47 µF 50v Thrgh-Hole Electrolytic
1 47 µF 100v Thrgh-Hole Electrolytic
2 47 µF 200v Thrgh-Hole Electrolytic
2 100 µF 10v Thrgh-Hole Electrolytic
4 100 µF 16v Thrgh-Hole Electrolytic
2 100µF 160v Thrgh-Hole Electrolytic
1 220 µF 10v Thrgh-Hole Electrolytic
1 470 µF 16v Thrgh-Hole Electrolytic
3 1000 µF 16v Thrgh-Hole Electrolytic

2nd Rev. (?) CRT Neck Board (SH SH7 94V-0^, 11-Q13A 10)

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
3 0.1 µF 50v Thrgh-Hole Electrolytic
1 0.47 µF 50v Thrgh-Hole Electrolytic
4 1 µF 100v Thrgh-Hole Electrolytic
1 4.7 µF 250v Thrgh-Hole Electrolytic
1 47 µF 16v Thrgh-Hole Electrolytic
1 47 µF 100v Thrgh-Hole Electrolytic
2 470 µF 16v Thrgh-Hole Electrolytic

Motherboard (820-0816-D)

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
12 47 µF 16v SMD 6.3mm Electrolytic
6 100 µF 6v SMD 6.3mm Electrolytic
1 100 µF 25v SMD 6.3mm Electrolytic

Microphone Board

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
2 4.7 µF 25v SMD 6.3mm Electrolytic

Front Buttons Board

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
1 100 µF 6v SMD 6.3mm Electrolytic

**Total**

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
3 0.3 µF 50v Thrgh-Hole Electrolytic
2 0.22 µF 50v Thrgh-Hole Electrolytic
1 0.47 µF 50v Thrgh-Hole Electrolytic
3 1 µF 50v Thrgh-Hole Electrolytic
4 1 µF 100v Thrgh-Hole Electrolytic
1 1 µF 160v Thrgh-Hole Electrolytic
1 4.7 µF 250v Thrgh-Hole Electrolytic
1 10 µF 50v Thrgh-Hole Electrolytic
1 10 µF 100v Thrgh-Hole Electrolytic
4 22 µF 16v Thrgh-Hole Electrolytic
2 22 µF 50v Thrgh-Hole Electrolytic
2 33 µF 16v Thrgh-Hole Electrolytic
5 47 µF 16v Thrgh-Hole Electrolytic
4 47 µF 25v Thrgh-Hole Electrolytic
3 47 µF 50v Thrgh-Hole Electrolytic
4 47 µF 100v Thrgh-Hole Electrolytic
1 47 µF 160v Thrgh-Hole Electrolytic
2 47 µF 200v Thrgh-Hole Electrolytic
2 100 µF 10v Thrgh-Hole Electrolytic
4 100 µF 16v Thrgh-Hole Electrolytic
1 100 µF 100v Thrgh-Hole Electrolytic
2 100 µF 160v Thrgh-Hole Electrolytic
2 220 µF 10v Thrgh-Hole Electrolytic
1 220 µF 16v Thrgh-Hole Electrolytic
1 220 µF 25v Thrgh-Hole Electrolytic
1 330 µF 25v Thrgh-Hole Electrolytic
1 470 µF 10v Thrgh-Hole Electrolytic
3 470 µF 16v Thrgh-Hole Electrolytic
1 470 µF 25v Thrgh-Hole Electrolytic
1 560 µF 400v Thrgh-Hole Electrolytic
7 1000 µF 16v Thrgh-Hole Electrolytic
3 1000 µF 25v Thrgh-Hole Electrolytic
1 2200 µF 25v Thrgh-Hole Electrolytic
1 3300 µF 10v Thrgh-Hole Electrolytic
1 6800 µF 10v Thrgh-Hole Electrolytic
2 4.7 µF 25v SMD 6.3mm Electrolytic
12 47 µF 16v SMD 6.3mm Electrolytic
7 100 µF 6v SMD 6.3mm Electrolytic
1 100 µF 25v SMD 6.3mm Electrolytic

Replacement Parts

Still working on that one.

Basic PCB Name

Capacitors
RefDes Qty Compatible Part Number Order Links
Digikey

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

Related Links

References

Retrieved from "https://caps.wiki/index.php?title=Power_Macintosh_(Performa)_5500/250&oldid=5629"