I start to saying how much i hate repairing psu switching, one of the most boring things second only to the repair of CRT Monitor, at least for me.

However this repair was made. The failure is almost certainly caused by a copious spillage of electrolyte (conductive fluid usually formed from a salt solution or acid which is located inside of the electrolytic capacitors) and a dangerous test if the machine works again after the electrolyte was leaking over the pcb.

The moral of the story is easy to figure out, a short circuit has made several deaths, a good portion of the Primary (PWM) and Secondary.

The components that have been replaced are the following:

• 1 x Electrolytic Capacitor 3300µF 16v 105°
• 1 x Electrolytic Capacitor 1000µF 25v 105°
• 1 x Electrolytic Capacitor 2200µF 35v 105°
• 1 x Electrolytic Capacitor 1000µF 100v 105°
• 1 x Electrolytic Capacitor 330µF 160v 105°
• 1 x Electrolytic Capacitor 47µF 25v 85°
• 1 x Electrolytic Capacitor 10µF 100v 85°
• 1 x Electrolytic Capacitor 22µF 25v 85°
• 1 x Sanken Hybrid Voltage Reculator Module STR 53041
• 1 x Photocoupler TLP 541G
• 1 x Overcurrent Protection Elements ICP N10
• 1 x Transistor C1815GR
• 1 x Transistor DTC114 ESA (C114 ESA)

After 1 week i have decided to replace also all capacitors of the power supply section of the computer.

Components replaced:

• 1 x Electrolytic Capacitor 3300µF 25v 105°
• 3 x Electrolytic Capacitor 5600µF 10v 105°
• 1 x Electrolytic Capacitor 2200µF 10v 105°
• 1 x Electrolytic Capacitor 330µF 35v 105°
• 1 x Electrolytic Capacitor 1000µF 16v 105°
• 1 x Electrolytic Capacitor 470µF 25v 105°
• 1 x Electrolytic Capacitor 1µF 50v 105°

Gallery of the repair:

12►

A very nice tale of a dear friend of a day spent in my laboratory. Happy reading.

source: ti99iuc.it

Commodore Amiga 500+ #1

Defect:

• Battery Leaks.

Solution:

• Battery Removed.
• Cleaned the PCB with PCC Kontakt.

Commodore Amiga 500+ #2

Defect:

• Battery Leaks.

Solution:

• Battery Removed.
• Cleaned the PCB with PCC Kontakt.

Commodore Amiga 600

Defect:

• Where are the capacitors and the tracks ?

Solution:

• Cleaned the PCB with PCC Kontakt.
• Alternative way to install the capacitors ;-D

AspeQt is a cross-platform, free and open source Atari 8-bit serial peripheral emulator. The name is an acronym for Atari serial peripheral emulator for Qt, Qt being the cross-platform application development framework used by AspeQt.

AspeQt emulates various Atari 8-bit peripherals like disk drives and printers via an SIO-2-PC cable. If you are familiar with software like Sio2Pc, APE, Atari810, AtariSIO etc., you probably won’t have any problems getting used to AspeQt.

Even though AspeQt is not fully mature yet, it is easy to use and, despite its shortcomings, has many features that you may find useful, the highlights being:

• Cross-platform GUI with drag and drop support.
• 15 emulated disk drives with support for 512 bytes per sector disk images.
• High speed operation up to 6 times faster than the normal speed (With compatible OS / DOS)
• Ability to use PC folders as emulated disks.
• Disk image explorer for viewing and modifying disk image contents.
• Ability to run Atari executables directly without using disc images and Doses.
• Printer emulation with preview and ATASCII support.
• Cassette image playback with custom baud rate.
• Ability to save and restore AspeQt sessions with its UI settings..=
• Normal and mini UI modes.

Version 1.0.0 Preview-6 (May 23, 2014) (Ray Ataergin):

• Windows registry entries for AspeQt are now stored under “atari8warez.com” registry tree, the program will automatically migrate settings on the next run. Existing AspeQt session files storing session settings are not affected by this change
• Code needed to compile AspeQt under Mac OS X is added (David Voswinkel – optixx) (see compile.rtf file included with the source archive)
• Folder images are now emulated in DOS 2.5 disk format rather than DOS 2.0 This gives more unique sector numbers to work with before they are re-used in a circular fashion.
• Fixed the “Not a binary file” error loading certain executable files.
• Text conversion is now OS platform aware (Win, Linux, OS X)
• Explorer Window Stay-on-top feature is now user selectable and persistent across sessions.

Download:

• AspeQt v1.0.0 Preview-6 (1431)

source: aspeqt.sourceforge.net