Commodore VIC-20 (ASSY 250403) Repair
Commodore VIC-20 Repair.
Defect:
- Black Screen.
Replaced parts:
- Replaced MOS VIA 6522 (UAB1)
- Replaced BASIC ROMS 901486-01 (UE11)
Gallery of the repair:
Commodore VIC-20 Repair.
Defect:
Replaced parts:
Gallery of the repair:
Commodore 64C (ASSY 250469) Repair
Defect:
Replaced parts:
Note:
Gallery of the repair:
Atari 600XL Repair & Memory Upgrade
Defect:
Repair:
Enhancements:
Gallery:
This is a very simple composite video and audio mod for the Interton VC4000 console.
You need to remove the RF modulator (recommend to removing it completely) by removing all pins and then connect the video (V) Audio (A) and ground (G) signals like the photo and then use the same hole of the RF cable for the new video and audio cable.
Gallery:
Olivetti Prodest 128S (Acorn BBC Master Compact) Modding
I found in the box of the rubbish dump two Olivetti Prodest 128S that was given to me long time ago by a dear friend: Andrea Pierdomenico.
Both computers are without the Floppy Drive and Power Supply external module.
I chose one of two in a better conditions and i did a modding to use it with a VGA Monitor and SDCARD instead of Floppy Disk plus some extras.
Work that has been done:
TurboMMC pinout for the internal installation:
Gallery of work that was done:
Download:
Commodore Amiga 500+ Replace Keyboard Membrane
Defect:
Replaced parts:
Gallery of work that was done:
Conversion Amiga 500 REV 8A (512k Chip RAM) to 500+ (1MB CHIP Ram)
Some Amiga 500 sold at the end of 1991/beginning of 1992 have a motherboard of an Amiga 500+ but limited to the capabilities of a regular Amiga 500 with 512k of Chip RAM.
These motherboards can be converted to 500+ simply installing the missing pieces; RAM section and REALTIME CLOCK.
What i did is add a 512K to have 1MB of Chip RAM like the amiga 500+.
Gallery of work that was done:
Chinon FB-354 ReCAP (Amiga Floppy Drive)
Defect:
Replaced parts:
Gallery of work that was done:
Panasonic JU-253-043P ReCAP (Amiga Floppy Drive) #1
Defect:
Replaced parts:
Gallery of work that was done:
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Panasonic JU-253-043P Replace Micro Switch (Amiga Floppy Drive) #2
Defect:
Replaced parts:
Gallery of work that was done:
Teac FD-235F ReCAP (Amiga Floppy Drive)
Defect:
Replaced parts:
Gallery of work that was done:
Commodore 16 Repair
Defect:
Replaced parts:
Texas Instruments TI-99-/4A Empty PCB
This is what remained after the recovery. Some components (all TTL) are not been recovered, others were are already recovered some times ago for spare parts.
Gallery:
Hyperkin Supaboy S – RGB/Svideo HACK
I have decided to make this hack because the native video output of the Hyperkin Supaboy S is really bad, uses the composite video.
The photos with the LCD monitor use the SVIDEO output while the photos with the Sony CRT monitor use the RGB output.
The photos and the schematic describe very well the work that needs to be done, the hack is not complex but you always have to be makes particularly attention to the SMD (CXA 1645M) side welds.
RGB/Svideo Schematics:
Gallery of the work that was done:
Philips Videopac+ G7400 RGB/Composite Hack – Repair – Recap
I have received a gift from my dear friend Andrea Pierdomenico a Videopac+ G7400 console with the BASIC Microsoft module and some cartridges that go into my collection of videopac cartridges.
This console running smoothly but with some problems.
The works that have been made:
Videopac+ G7400 RGB/Composite Hack (components that need to be added):
All the works that have been made are documented in the photos below:
source: g7400 guide rgb mod
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