Apple IIGS

Apple IIGS on Wikipedia

Computers in Collection

• Apple IIGS, model A2S6000, serial A2S2-E905YV8A2S6000
• Apple IIGS, model A2S6000, serial A2S2-E7041H8A2S6000
• Apple IIGS, model A2S6000, serial A2S2-E7302GCA2S6000

General Info

Power Supply

Rifa Capacitors

This power supply contains Rifa capacitors, which will eventually fail and release acrid smoke. It’s best to replace them before that happens, ideally with appropriate X/Y class capacitors that do not have the intrinsic limitations that old Rifa capacitors do.

Qty	Description	Dimensions	Lead Spacing	Replacement
2	0.22uF X2 (a) RIFA PME 271 M 40/085/56 CV2 250V~SH (OVE) 565-1 LD2	23.4 mm x 11.3 mm x 16.8 mm	20.3 mm (also hole for ~23 mm)	KEMET R463N322050M1K
2	4700pF Y (b) RIFA PME 271 Y 40/085/56 CV1 250V~SH (OVE) 565-1 LD2	13 mm x 4.7 mm x 10.3 mm	10 mm, mounted bent-down on the side	KEMET ‎PHE850EA4470MA03R17‎

Fuse

The fuse is soldered in.

Markings on the original fuse: “(UL) BEL 3AG 1A 250V (SA)”. Fuse is best described as “glass cartridge with termination caps and axial solder leads attached”. Bel fuse part number may be “3AG 1-R”, therefore a “fast blow” fuse. Part number “3AP 1-R” should be the axial leaded version. Replace with Littelfuse 0318001.HXP.

Apple IIGS, serial A2S2-E905YV8A2S6000

Inventory

Acquired from nghtgale@eBay on 2017/Sep/10.

Case

Attribute	Value
Name	Apple IIGS Computer
Manufacturer	Apple
Model	A2S6000
Serial	A2S2-E905YV8A2S6000
ROM	01
Source	2017/Sep/10, nghtgale@eBay

Logic Board

TODO:

Internal Power Supply

TODO:

Memory Expansion Card

Attribute	Value
Name	Apple IIGS Memory Expansion Card
Manufacturer	Apple
Model	TODO:
Manufactured In	Singapore
Markings	“BCGS6DSA26002” “S” “670-0035-A”
ICs	8 x NEC A D41256C-15 “8623” - “8629”, 16 x TI TMS4256-10NL “9009”, 8 x Hitachi HM4864P-3 “4A3U”
Source	2017/Sep/10, nghtgale@eBay

Apple IIGS, serial A2S2-E7041H8A2S6000

Inventory

Acquired from Oneonta basement on 2018/Mar/10.

Case

Attribute	Value
Name	Apple IIGS Computer
Manufacturer	Apple
Model	A2S6000
Serial	A2S2-E7041H8A2S6000
Markings	“Woz”
ROM	TODO:
Source	2018/Mar/10, Oneonta

Logic Board

TODO:

Internal Power Supply

TODO:

Memory Expansion Card

TODO: “w/Apple memory expansion 3/4 unpopulated.”

Apple IIGS, serial A2S2-E7302GCA2S6000

Inventory

Acquired from Oneonta basement on 2018/Mar/10.

Case

Attribute	Value
Name	Apple IIGS Computer
Manufacturer	Apple
Model	A2S6000
Serial	A2S2-E7302GCA2S6000
Markings	Apple sticker
ROM	01
Source	2018/Mar/10, Oneonta

Logic Board

TODO:

Internal Power Supply

Attribute	Value
Name	Apple IIGS Internal Power Supply
Manufacturer	Dyna Comp, Inc.
Part	TODO:
Apple Model	699-0126
Serial	17132TL1261
Input	110V AC, 50-60 Hz, 60W maximum
Output	+5V DC @ 4A, +12V DC @ 1A (1.8A peak), -5V DC @ 0.25A, -12V DC @ 0.25A
Certifications	“UR E55974”, “SA LR62786”
Case Markings	“COMPONENT TYPE” “CUSTOM RECTIFIER” “HIPOT 5” “F/QC 2”
Board Markings	“BD76426X3”, “PNE-6”, “28 8717 2”

Memory Expansion Card

TODO: “w/Applied Engineering memory expansion 1/6 populated.”

Maintenance Log

2020/Feb/07

Left system on for a while (ten minutes) and then heard the classic Rifa “frying bacon” hiss. Turned off the computer. The acrid Rifa smell did eventually come out a bit when I moved the system around, but was otherwise well-contained.

Opened up the power supply. Failed to remove the DC power wire bundle grommet with the tools on hand, but was able to work the PCB out of the case with a bit more persistence.

There was expelled soot on the circuit board, likely from the crack in the larger Rifa on the right side of this picture.

All the Rifa capacitors were cracked in the usual manner. There was no evidence of explosive smoking or self-disassembly.

The Rifa capacitors were examined and replaced with modern substitutions.

The fuse was blown, which is a bit unusual for a Rifa capacitor failure. I replaced it with a modern substitution.