Olivetti M24 and ATT 6300: Difference between revisions

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(Created page with "{{WikipediaInfoAlt|Device}} {{DeviceAlerts}} {{InfoboxDevice |Picture = |Release Year = 1983 |Mounting Technology = Through Hole, Sockets |Capacitor Types = Aluminum Electrolytic, Tantalum, Ceramic, |Leak Risk = High |Batteries = Yes, RTC known to leak |Destructive Entry = No }} Created by Olivetti and licensed by AT&T the M24/ 6300 is an 8086 PC clone with some proprietary changes ==Known Issues== ===Battery on Motherboard Leaks=== ====Causes==== *RTC battery can lea...")
 
 
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{{WikipediaInfoAlt|Device}}
{{WikipediaInfoAlt|Olivetti M24}}
{{DeviceAlerts}}
{{DeviceAlerts}}
{{InfoboxDevice
{{InfoboxDevice
|Picture =  
|Picture =ATT-6300.png
|Release Year = 1983
|Release Year = 1983
|Mounting Technology = Through Hole, Sockets
|Mounting Technology = Through Hole, Sockets
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|Destructive Entry = No
|Destructive Entry = No
}}
}}
Created by Olivetti and licensed by AT&T the M24/ 6300 is an 8086 PC clone with some proprietary changes
Olivetti launched the M24 in 1983. This was based around the Intel 8086-2 which ran at a respectable 8 MHz.


On many levels the Olivetti computer was ahead of its time not only in the design but also in it's hardware.
Its graphics capability was to some extend at that time a bit odd, as it had an biuld-in enhanced CGA video card which in addition to the standard 320 x 200 also supported 640 x 400 x 2-colours. It did required a proprietary dual-sync monitor with a 25-pin D-sub connector.
The keyboard connector did also different from the IBM PC/XT, in that it used a 9-pin D-sub instead of a round DIN. But it was compatible with the later PS/2 pinouts. A Olivetti mouse could be plugged directly into the keyboard. The mouse could be configured to simulate the usage of the keyboard's arrow keys in DOS applications without mouse support. This is similar to how the Amstrad PC1512 mouse worked.
All M24s were bundled with MS-DOS 2.1 by Olivetti
Olivetti also licensed both Xerox and AT&T in US and Logabax in France to release the M24 under their respective brands, as the Xerox 6060, the AT&T PC 6300 and Persona 1600.
By 1986 the M24 was the #1 market leader in Europe, with approximately 300,000 M24s being sold that year. Due to this high level of sales, Olivetti was branded the third largest PC manufacturer in the world.
Fun facts
* Internally the Olivetti M series was known as PC1050. A label you will see on all the motherboards and some of Olivetti's own expansion cards such as the CRT card
* Having the Intel 8086-2 CPU running at 8/10 Mhz also made it the worlds first overclocked PC
==Known Issues==
==Known Issues==
===Battery on Motherboard Leaks===
===Battery on Motherboard Leaks===
====Causes====
====Causes====
Line 19: Line 33:
====Solutions====
====Solutions====
*Remove battery and clean with baking soda
*Remove battery and clean with baking soda
 
=== No Power ===
==== Causes ====
* Pins soldered on the power supply board may be broken loose, especially for heavy parts like transformers or connectors like for the molex power cable.
<gallery>
File:6300-transformer-pins-jointbroke.jpg|Pins on transformer on second stage of PSU PCB cracked loose
File:6300-molex-pins-jointbroke.jpg|Pins on Molex power connector for floppy drives on second stage of PSU PCB cracked loose
</gallery>
==== Solutions ====
* In a pinch, reflow the solder to reconnect it. But new solder should be added.
** After reflowing parts could be glued down to help avoid it happening again
==Original Parts==
==Original Parts==
===Power Supply ===
===Power Supply ===
''PCB is split but does not duplicate RefDes', C1050 AL191/1-B, COD 303603 P, P-P3, PSU Model 303219M''
''PCB is split but does not duplicate RefDes', C1050 AL191/1-B, COD 303603 P, P-P3, PSU Model 303219M''
{| class="wikitable sortable"
{| class="wikitable sortable"
|+Capacitor [[Capacitor Specifications|Specifications]] and [[Part Footprints|Footprint]] Information
|+Capacitor [[Capacitor Specifications|Specifications]] and [[Part Footprints|Footprint]] Information
!RefDes
!RefDes
!Qty
!Qty
Line 31: Line 54:
![https://caps.wiki/wiki/Part_Footprints Mount]
![https://caps.wiki/wiki/Part_Footprints Mount]
!Diameter/Size
!Diameter/Size
!Lead Spacing
!Temp
!Temp
![https://caps.wiki/wiki/Capacitor_Types Type]
![https://caps.wiki/wiki/Capacitor_Types Type]
Line 42: Line 66:
|Through Hole Radial
|Through Hole Radial
|30mm
|30mm
10mm Pitch
|10mm
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
|Nichicon
|Nichicon
|PS-M
|[[Capacitor Series#PS|PS-M]] - Temp rating does not match series datasheet
|-
|-
|132, 139
|132, 139
Line 54: Line 78:
|Through Hole Radial
|Through Hole Radial
|5mm
|5mm
|
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
|Nichicon
|Nichicon
|SE-M
|SE-M - Cannot find this series
|-
|-
|50, 62
|50, 62
Line 65: Line 90:
|Through Hole Radial
|Through Hole Radial
|8mm
|8mm
|
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
Line 76: Line 102:
|Through Hole Radial
|Through Hole Radial
|5mm
|5mm
|
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
Line 90: Line 117:
|Through Hole Radial
|Through Hole Radial
|10mm
|10mm
|
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
Line 101: Line 129:
|Through Hole Radial
|Through Hole Radial
|10mm
|10mm
|
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
Line 112: Line 141:
|Through Hole Radial
|Through Hole Radial
|10mm
|10mm
|
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
Line 123: Line 153:
|Through Hole Radial
|Through Hole Radial
|16mm
|16mm
|
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
Line 134: Line 165:
|Through Hole Radial
|Through Hole Radial
|10mm
|10mm
|
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
Line 145: Line 177:
|Through Hole Radial
|Through Hole Radial
|16mm
|16mm
|
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
Line 156: Line 189:
|Through Hole Radial
|Through Hole Radial
|18mm
|18mm
|
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
Line 167: Line 201:
|Through Hole Radial
|Through Hole Radial
|18mm
|18mm
|
|85C
|85C
|Aluminum Electrolytic
|Aluminum Electrolytic
Line 172: Line 207:
|S
|S
|}
|}
==References==
<references />YouTube links:
[https://youtu.be/L5s3u3A1b-0 Olivetti M24 8086 - Episode 1 - Lets get it clean]


==Related Links==
[https://youtu.be/cqOqy7-hQeE Olivetti M24 8086 - Episode 2 - Ram Expansion 512kb to 640kb]
 
[[Category:Computer]]
*[https://www.youtube.com Videos or other things that might be helpful to check out]
[[Category:1980s]]
 
[[Category:WorkNeeded:ReplacementParts]]
==References==
[http://hadesnet.org/olivettim24/docs/PC6300SM.pdf Service Manual]
<references />

Latest revision as of 00:07, 10 April 2023

For more information, see this article's corresponding Wikipedia page: Olivetti M24.
This device is in the WorkNeeded:ReplacementParts category because it was flagged as missing information on replacement parts. If it has the original parts listed you may be able to search for replacements using the parametric searches available from parts distributors. If you have or make a list of replacement parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables
Olivetti M24 and ATT 6300
Preliminary Information
Release Year 1983
Leak Risk High
Batteries Yes, RTC known to leak
Mounting Technology Through Hole, Sockets
Capacitor Types Aluminum Electrolytic, Tantalum, Ceramic,
Destructive Entry No

Olivetti launched the M24 in 1983. This was based around the Intel 8086-2 which ran at a respectable 8 MHz.

On many levels the Olivetti computer was ahead of its time not only in the design but also in it's hardware.

Its graphics capability was to some extend at that time a bit odd, as it had an biuld-in enhanced CGA video card which in addition to the standard 320 x 200 also supported 640 x 400 x 2-colours. It did required a proprietary dual-sync monitor with a 25-pin D-sub connector.

The keyboard connector did also different from the IBM PC/XT, in that it used a 9-pin D-sub instead of a round DIN. But it was compatible with the later PS/2 pinouts. A Olivetti mouse could be plugged directly into the keyboard. The mouse could be configured to simulate the usage of the keyboard's arrow keys in DOS applications without mouse support. This is similar to how the Amstrad PC1512 mouse worked.

All M24s were bundled with MS-DOS 2.1 by Olivetti

Olivetti also licensed both Xerox and AT&T in US and Logabax in France to release the M24 under their respective brands, as the Xerox 6060, the AT&T PC 6300 and Persona 1600.

By 1986 the M24 was the #1 market leader in Europe, with approximately 300,000 M24s being sold that year. Due to this high level of sales, Olivetti was branded the third largest PC manufacturer in the world.

Fun facts

  • Internally the Olivetti M series was known as PC1050. A label you will see on all the motherboards and some of Olivetti's own expansion cards such as the CRT card
  • Having the Intel 8086-2 CPU running at 8/10 Mhz also made it the worlds first overclocked PC

Known Issues

Battery on Motherboard Leaks

Causes

  • RTC battery can leak and cause corrosive damage

Solutions

  • Remove battery and clean with baking soda

No Power

Causes

  • Pins soldered on the power supply board may be broken loose, especially for heavy parts like transformers or connectors like for the molex power cable.
  • Pins on transformer on second stage of PSU PCB cracked loose

    Pins on transformer on second stage of PSU PCB cracked loose

  • Pins on Molex power connector for floppy drives on second stage of PSU PCB cracked loose

    Pins on Molex power connector for floppy drives on second stage of PSU PCB cracked loose

Solutions

  • In a pinch, reflow the solder to reconnect it. But new solder should be added.
    • After reflowing parts could be glued down to help avoid it happening again

Original Parts

Power Supply

PCB is split but does not duplicate RefDes', C1050 AL191/1-B, COD 303603 P, P-P3, PSU Model 303219M

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Lead Spacing Temp Type Brand Series
124, 134 2 680µF 200V Through Hole Radial 30mm 10mm 85C Aluminum Electrolytic Nichicon PS-M - Temp rating does not match series datasheet
132, 139 2 22µF 25V Through Hole Radial 5mm 85C Aluminum Electrolytic Nichicon SE-M - Cannot find this series
50, 62 2 100µF 25V Through Hole Radial 8mm 85C Aluminum Electrolytic Nichicon SE-M
83B 1 4.7µF 63V Through Hole Radial 5mm 85C Aluminum Electrolytic ? 0.03(M)

8410

Jacket is Yellow

74 1 470µF 16V Through Hole Radial 10mm 85C Aluminum Electrolytic Ace SE-M
69 1 1000µF 6.3V Through Hole Radial 10mm 85C Aluminum Electrolytic Ace SE-M
28 1 220µF 35V Through Hole Radial 10mm 85C Aluminum Electrolytic Ace SE-M
35 1 2200µF 10V Through Hole Radial 16mm 85C Aluminum Electrolytic Nichicon SE-M
65 1 1000µF 16V Through Hole Radial 10mm 85C Aluminum Electrolytic Ace SU
35B 1 2200µF 25V Through Hole Radial 16mm 85C Aluminum Electrolytic Nichicon SE-M
21 1 10,000µF 6.3V Through Hole Radial 18mm 85C Aluminum Electrolytic Nichicon SE-M
20 1 4700µF 16V Through Hole Radial 18mm 85C Aluminum Electrolytic Ace S

References

YouTube links: Olivetti M24 8086 - Episode 1 - Lets get it clean

Olivetti M24 8086 - Episode 2 - Ram Expansion 512kb to 640kb Service Manual

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