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Archive for July 9th, 2014

Repair Commodore Amiga 600 (White Screen)

July 9th, 2014 1 comment
Repair Commodore Amiga 600 (White Screen)

Gallery of the repair:

Repair Commodore Amiga 600 (White Screen)

Defect:

  • White Screen.

Replaced parts:

  • 1 x LM555 (SMD)
  • 1 x Electrolytic Capacitor 10uf 25v

Note:

I have thought it was a problem of RAM (U17) since i have measured oddities but the problem instead is a capacitor of 10uF, dead LM555 (smd) and some pcb tracks corroded.

Repair Philips 8220 (MSX2) Black Screen with Sound

July 9th, 2014 1 comment
Repair Philips 8220 (MSX2) Black Screen with Sound

Repair Philips 8220 (MSX2) Black Screen with Sound.

Defect:

  • Black Screen but with sound (keyboard works)

Replaced parts:

  • 2 x Fuse 250v 315ma
  • 4 x Tantalum Capacitor 22uf 6v
  • 1 x Electrolytic Capacitor 100uf 25v

Note:

The main problem was caused by the lack of +12 volts that power the RGB Encoder module. The other voltage of -12 volts are used only for the cartridges port (but not all cartridges using this voltage)