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Robotrontechnik-Forum » Technische Diskussionen » K7222 used CRT types » Themenansicht

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000
Heute, 11:25 Uhr
RetroNora



Hello
I have bought a K8915 computer, sadly the seller did not do a good job packing it and the unit arrived smashed.


What is the worst the CRT was also damaged.


I have started to look for a replacement but I do not understand one thing:
K7222 schematics list a M31-340 type CRT that is 90 angle deflection tube.

While my unit used Z31-101KA tube by Unitra Zelos (polish production).

There is no much known about Z31-101KA tube other than it was used interchangeably with M31-310 tube. They are both 110 angle deflection tube.

I have checked my other K7222 monitors and they all used M31-310 tubes (by different manufacturers).

Is this an error in the schematics or there were different revisions of K7222 monitors that used different deflection angle tubes?
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001
Heute, 12:35 Uhr
RP



https://www.radiomuseum.org/tubes/tube_b31g1.html

In Monitor ist die B31G21 das ist die B31G1 mit grüner Leuchtschicht, die B31G1 geht auch, mit S/W Anzeige, die findet man in ,den DDR Koffer Fernsehern Combi Vision.

Rolf

Dieser Beitrag wurde am 20.05.2026 um 12:47 Uhr von RP editiert.
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002
Heute, 12:50 Uhr
Rüdiger
Administrator
Avatar von Rüdiger


Zitat:
RetroNora schrieb
I have bought a K8915 computer, sadly the seller did not do a good job packing it and the unit arrived smashed.



It was levity to choose parcel transport.
Such computers always should be picked up personally.
--
Kernel panic: Out of swap space.
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003
Heute, 13:58 Uhr
RetroNora



Well, I didn't have means to drive 1600 km (in both ways) to pick it up.

If it would be packed good I bet it would survive, the seller did really poor job with packing.
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