Keithley 2000

[klaus11]

I'm trying to repair a K2000, fault 600.1, 600.2, 601.1, 601.2. I have replaced all the transistors marked with 6G mmbf4393 but I find with 3 transistors 132 marked:
2 transistors, pins 2 and 3 in short and third transistor Pins 2 and 3 not short.
Like, you can be a double diode NXP.
Someone help me with device 132.

[RobK_NL]

Have you looked at the schematic? https://dev.xdevs.com/projects/kei2000/repository/raw/schematics/K2000_bbs_38hot_net.pdf

[klaus11]

Yes, the scheme marking all snj132199. But all device 6G, exception 3 device marked 132.
I have replaced 3 mmbf4393 device 132, and have general error in DCV

[klaus11]

I cleaned device 132, now 3 same measures. Become welded in place.
Surprise all bugs fixed 60X.X. 6G also replaced all transistor.
30X.X. errors appear
  Before they were not. You can mistake buffer masked by Q109, Q106, Q105 ...