On Tue, 2 Oct 2018, machineguy59 via Groups.Io wrote:
Yes, but that is a separate issue. It might also need PS re-capping (that is
a good thing to do once it is already opened for maintenance) but that is
generic and applies to almost any instrument that is 10+ years old.
A5 board in 2467B is the same as in 2465B, just different firmware.
I want to add that it may also need repairs on the A5 control board.?
These used surface mount parts and the electrolytic capacitors leaked onto
the board, etching traces and components until they failed.? I have
repaired three 24x5B scopes that had this failure.? I am not sure if the
2467B are subject to the same faults but I think they are. ?
On Tuesday, October 2, 2018 11:52:18 AM CDT, Sergey Kubushyn <ksi@...> wrote:
On Mon, 1 Oct 2018, jmtfungus via Groups.Io wrote:
2467B is the crown jewel of them all. MCP CRT makes a huge difference
letting you see what you could miss on 2465B.
TEST 4 FAIL 10 is nothing to worry about -- it is dead battery in Dallas
NVRAM chip. You'll have to replace it with a new NVRAM (buy it from DigiKey
or Mouser, not from Ebay so you'll get a really fresh one, not something at
the end of its life) or, better yet, with FRAM and recalibrate.
There is no separate battery in 2467B (don't know if 2467B was ever made
with separate readout board and A5 with DIP chips as older 2465B were; those
had a separate LTC-7P battery that is also available from DigiKey) so you'll
have to remove a 32-pin DIP brick which requires some desoldering station or
accurate work with solder wick. It is worth installing a socket once old
chip is removed so you won't have to unsolder it next time. It is a brick
with all pins underneath so you won't be able to cut the pins and then
remove them one-by-one so it might be tricky if you don't have a desoldering
station.
Other than that it is wonderful scope and MCP CRT allows you to clearly see
that infamous fast edge from tunnel diode pulser at 100kHz repetition rate.
You won't see it on 2465B at daylight, it will be very dim on a regular CRT.
I have 2467B as my primary scope with 1GHz LeCroy DSO sitting on the desk
for some very rare occasional jobs that require digital storage. LeCroy gets
powered on once, maybe twice a year and it is not anywhere near 2467B in
signal display quality and not as easy to use as 2467B is. I even have a
spare 2467B sitting on the shelf, just in case :)
Hi all, a local seller is offering a Tektronix 2467B for around $300 USD.
The catch is it has an error code TEST 4 FAIL 10 at power on and claims it
just requires re-calibration. Would any knowledgeable members be willing
to recommend for or against purchase? My current understanding is that
re-calibration is quite involved and that it could also be potentially be
a hardware issue, such as an NVRAM module not storing the calibration
---
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Sergey Kubushyn