I have one of those scopes. When I acquired it the HV section was
non-functional and in partial disassembly. After first thinking that
the big oscillator transistor was bad and after replacing the HV
rectifier, I discovered that the real problem (probably) was that the
HV cap was leaky and had to be replaced. The scope has been running
for several years (although I don't work it too hard). I'll have a
look at my manual and see how your parts difficulties compare to what
Also, my 7613 has no readout board (I would LIKE one if anyone has
one, BTW ... hint, hint) and so, YES, the scope can run just fine
without it. My scope is USAF surplus and I think was originally
configured as a spectrum analyzer (hence, no readout board, has log
scaled graticule, &c.).
--- In TekScopes@yahoogroups.com, "Stan & Patricia Griffiths"
I don't recall seeing a response to this one. I checked theModification
Summary to see if failures of these parts are common and fixed by somegroup. I
Q1314, andhave a 7613 that continues to blow the HV regulator transistor,
can Idiode CR1215 (from the collector of Q1314 to ground). The switching
goreadoutabout isolating the problem; also, can the scope operate with the
system board disconnected.