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Deze versie is geschreven door: Kostas ,

Titel:

No display image in the vectrex

Tekst:

My vectrex has no image displayed on the screen after replacing two chips in the logic board with the same type. The filament of the tube does not light up. I measured the filament for continuity and it is ok but no voltage on it. It worked before I replaced these chips. Is there any way that the logic board sends commands to light up the filament? I do not think so.
However, I do not hear any sound when powering up the vectrex,shouldn’t I regardless of the screen working or not?
Please help
+
+=== Update (03/01/2019) ===
+
+Only 6,7 and 8 pins at the output transrofmer have 12v on them. These are in the primary. The secondaries have no voltage. Probably a blown HV transformer?

Apparaat:

Vectrex

Status:

open

Origineel bericht door: Kostas ,

Titel:

No display image in the vectrex

Tekst:

My vectrex has no image displayed on the screen after replacing two chips in the logic board with the same type. The filament of the tube does not light up. I measured the filament for continuity and it is ok but no voltage on it. It worked before I replaced these chips. Is there any way that the logic board sends commands to light up the filament? I do not think so.

However, I do not hear any sound when powering up the vectrex,shouldn’t I regardless of the screen working or not?

Please help

Apparaat:

Vectrex

Status:

open