Electrohome G07 - VR 2SC1106 testing

[callanbrown]

Hi guys,

I was dealing with a G07 in HV shutdown. Removing X701 got the monitor on so I knew it was in the power section.

I took out the C1106 "voltage regulator" fr X04 and tested it and it read as two diodes which I have seen before in dead transistors, fine.

I had a spare old NEC C1106 from a G07 presumably, and since I kept it around I figured it worked, so I tested it and it was recognized as an NPN with reasonable parameters. Put this one in and still HV shutdown.

I decided to order some new old stock 2SC1106 (manufacturer Signetics I think), and it measured nearly identical to the last C1106. To my surprise, this new one worked fine in the G07.

So I just think it's odd the old C1106 tested fine but failed under load. Thought I should leave this info here in case someone else is struggling with the power section and a supposedly working X04. Since 2SC1106 and variants are still around and not expensive, you might as well just swap it out!

 

[PassivePac-Man]

This isn't super rare for bottle caps. I've never seen it in anything but a 3055, but it's fairly common with those

 

[chilibear13]

Just had a similar experience with some 3716,3792, and 3055 in an Asteroids. Old ones tested fine, but didn't work under load. Put in new ones and everything works.