I thank Fabio Bovelacci (Frater Sinister) for the donation.
Donated item:
Autopsy:
The JD-560 and JD -562 are a series of Floppy disk drives that can be connected externally of the computer.
They are completely applicable to IBM PC/XT/AT/386/486 compatible computers and need no any special interface cards.
Payed €12,50 a piece, that is the right price.
Practically, the price of a good pizza and a glass of water ;-D
This is a Commodore CBM 8296-D Motherboard repaired for a Friend.
Gallery of the repair:
Defect:
Replaced parts:
* The replacement of the two PLA has already been made earlier by my friend.
The conditions of this Commodore 8032-SK (Gold Label) are really bad. The CBM 8032-SK is left for over 25 years in a dovecote.
The cleaning, repairing and restoration have taken a very long time, but the result is more than acceptable.
Defects:
Repair:
Gallery of repair and cleaning:
Autopsy:
This version of Coleco Vision SECAM (Péritel/Euroconnector) uses a PCB 91162 REV D which differs from the classical version with PCB 91209 because integrates an internal video encoder from Y (BY) (RY) to RGB which is separate from the motherboard.
This makes think that in theory all PAL versions that use the VDP 9929A with PCB 91162 REV D and RF output can be modified to have a RGB output signal by adding this external video encoder.
from Wikipedia homepage:
The ColecoVision is Coleco Industries’ second generation home video game console, which was released in August 1982. The ColecoVision offered near-arcade-quality graphics and gaming style along with the means to expand the system’s basic hardware. Released with a catalog of 12 launch titles, with an additional 10 games announced for 1982, approximately 145 titles in total were published as ROM cartridges for the system between 1982 and 1984. River West Brands currently owns the ColecoVision brand name.
In 2009, IGN named the ColecoVision their 12th best video game console out of their list of 25, citing “its incredible accuracy in bringing current-generation arcade hits home.”
Coleco licensed Nintendo’s Donkey Kong as the official pack-in cartridge for all ColecoVision consoles, helping to boost the console’s popularity. By Christmas of 1982, Coleco had sold more than 500,000 units, in part on the strength of its bundled game. The ColecoVision’s main competitor was the arguably more advanced but less commercially successful Atari 5200.
The ColecoVision was distributed by CBS Electronics outside of North America, and was branded the CBS ColecoVision.
Sales quickly passed 1 million in early 1983, before the video game crash of 1983. By the beginning of 1984, quarterly sales of the ColecoVision had dramatically decreased.
Over the next 18 months, the Coleco company ramped down its video game division, ultimately withdrawing from the video game market by the end of the summer of 1985. The ColecoVision was officially discontinued by October 1985. Total sales of the ColecoVision are uncertain but were ultimately in excess of 2 million units, as sales had reached that number by the spring of 1984, while the console continued to sell modestly up until its discontinuation the following year.
In 1986, Bit Corporation produced a ColecoVision clone called the Dina, which was sold in the United States by Telegames as the Telegames Personal Arcade.
source: wikipedia
Autopsy:
The Intelli-Table is a round, plastic activity table with a blue, removable top that uses three interchangeable play rings to help children learn numbers, music, and games.
The curiosity of this device that was developed by Mattel in cooperation with Microsoft and distributed by Fisher Price in late 90s.
This game are been withdrawn from the market for construction problems, like say the Mattel Bulletin.
Video:
The conditions of this Commodore Dual Disk 8250 LP are really bad. The CBM 8250 LP is left for over 25 years in a dovecote.
The cleaning, repairing and restoration have taken a long time, but the result is more than acceptable.
Defects:
Repair:
Gallery of repair and cleaning:
Gallery of repair and cleaning:
This computer is arrived for a repair from a friend. The defect is the classic Black Screen of Death and also the PCB has certainly seen better days.
Defects found:
Repair:
Mod:
Autopsy:
The ZX Spectrum +2A was Amstrad’s first Spectrum, coming shortly after their purchase of the Spectrum range and “Sinclair” brand in 1986. The machine featured an all-new grey enclosure featuring a spring-loaded keyboard, dual joystick ports, and a built-in cassette recorder dubbed the “Datacorder” (like the Amstrad CPC 464, but was otherwise identical to the ZX Spectrum 128 in looks. Production costs had been reduced and the retail price dropped to £139–£149
The machine was built in Taiwan (making it the first Sinclair product built outside the UK) and Amstrad’s greater emphasis on quality control made it far more reliable than the first Spectrums.
Amstrad also took a very different line in marketing the ZX Spectrum +2A. Unlike Sinclair, Amstrad did not attempt to market the Spectrum as anything other than a games machine and sold it in packages such as the “James Bond 007 Action Pack” (with bundled games and a light gun). This approach was extremely successful, and the ZX Spectrum +2A sold very well.
The gun connects to the BT style serial ports on the 128K versions of the Sinclair ZX Spectrum, and allows you to point the gun at your TV screen – the programs then interpret the position of the gun on the screen when you press the trigger, giving you the feel and action of using a real gun to hit targets.
source: computinghistory.org.uk
Gallery:
Software titles:
Autopsy:
from Wikipedia homepage:
The Intellivision is a video game console released by Mattel in 1979. Development of the console began in 1978, less than a year after the introduction of its main competitor, the Atari 2600. The word intellivision is a portmanteau of “intelligent television”. Over 3 million Intellivision units were sold and a total of 125 games were released for the console.
In 2009, video game website IGN named the Intellivision the No. 14 greatest video game console of all time. It became Mattel’s first video game console, though it was their only console until the release of the HyperScan in 2006.
The Intellivision was developed by Mattel Electronics, a subsidiary of Mattel formed expressly for the development of electronic games. The console was test marketed in Fresno, California, in 1979 with a total of four games available, and was released nationwide in 1980 with a price tag of US$299 and a pack-in game: Las Vegas Poker & Blackjack. Though not the first system to challenge Atari, it was the first to pose a serious threat to Atari’s dominance. A series of advertisements featuring George Plimpton were produced, that demonstrated the superiority of the Intellivision’s graphics and sound to those of the Atari 2600, using side-by-side game comparisons.
Mattel Intellivision SECAM Motherboard:
source: wikipedia
Autopsy:
This Floppy Drive VIC-1541 (brown label with white case) unlike the known model of VIC-1541 uses a drive mechanism of Newtronics/Mitsumi White and not the usual ALPS brown.
The drive mechanism probably was replaced over the time but i have published the photos anyway.
from Wikipedia homepage:
The Commodore 1541 (also known as the CBM 1541 and VIC-1541) is a floppy disk drive (FDD) which was made by Commodore International for the Commodore 64 (C64), Commodore’s most popular home computer. The best-known FDD for the C64, the 1541 was a single-sided 170 kilobyte drive for 5¼” disks. The 1541 followed the previous Commodore 1540 (meant for the VIC-20).
The disk drive used Group Code Recording (GCR) and contained a MOS Technology 6502 microprocessor, doubling as a disk controller and on-board disk operating system processor. The number of sectors per track varied from 17 to 21 (an early implementation of Zone Bit Recording). The drive’s built-in disk operating system was CBM DOS 2.6.
source: wikipedia
This gallery shows some stages of the repair of the Sinclair Spectrum 48k.
Defects found on the Sinclair Spectrum #1:
Components replaced:
Defects found on the Sinclair Spectrum #2:
Components replaced:
Defects found on the Sinclair Spectrum #3:
Calibration:
Defects found on the Sinclair Spectrum #4:
Components replaced:
Defects found on the Sinclair Spectrum #5:
Components replaced:
The bad way used some years ago was cut the pin 8 of the all 4116 ram to isolate the bad one, in this case, i didn’t cut the pins of the ram, but i have cut the track of 12v which is part of all the 4116 ram, doing so, the transistor ZTX650(651) doesn’t explode.
At this point there is a short in one or more RAM between +12 and 0v. I have measured the absorption where i have cut the track and it absorbs too much.
I just have to unsolder the pin 8 of the 4116 ram and trying to isolate it for find which ram is short-circuited.
Defects found on the Sinclair Spectrum #6:
Components replaced:
Sinclair Spectrum Faulty / AutoLoad Video:
Autopsy:
How you can see from the gallery i had to remove the scotch tape that has been glued on the keys, the scotch tape with the long time has dried and detached, now the keyboard is perfect.
The Peters WS128 Home Computer is a Russian Clone of a Sinclair Spectrum 128 but with the addition of some features.
The Company Peters, then Peters Plus Ltd. is a company of microelectronic and computer founded in the year 1990 in St. Petersburg, known especially for the clone Sprinter.
Download: Spectrumpedia (1302)
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