DIYbanter - View Single Post - Tektronix 2445B Scope Problem , Help needed (Video Included)

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In article . com, wrote:

the right side PCB is the (IIRC,A5) microprocessor assembly(controls
everything),where the S&H amps and caps are located.That is how the
position and reference voltages are created;a MUXed DA converter and S&H
caps and buffer amps.There are even exerciser routines to check the range
of output voltages from them,as you vary the front panel controls.

--
Jim Yanik

i got another problem with 2430A , its got this DALLAS memory+battery
chip (U350 if i recall) , and of course the battery is dead .
the CAL data can't be saved , and you can't find those chips anymore .

If it's a typical "chunky" device like the DS1287, then internally it's
a small PCB with two Dallas chips on it (one sram, one battery backup
controller). On top of the PCB is a regular PCB mount 3V lithium cell.
So it is possible to carve the device open (in from the top side) and
fit a new cell.

Mike.