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Keithley 2400 SourceMeter review and teardown

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kawal:
Great job TiN. I should send my unit to you. Do you offer calibration services ?

Minikisscool:

Hi all, I read all.
I have a 2410 who is not working.
When power off, display shows OVP.

After diagnostics, the MAX EPM7160 on analog board is defect.
He is heating hot. (picture of a thermal camera)


The 5Volt  and power supply is good. I check on capacitor C616
L603 is good. Heating a little due to current consummation of EPM160

Anyone tried to read the binary of this CPLD ? or has binary file 2400-801A01 ?
I looked datasheet of components.
There is 4 pins TDO, TCK,  TDI and TDMS to program component.

Anyone to help me.

Thanks

Kleinstein:
CPLDs / PFPGAs do sometimes run quite hot. Also a shortet output or open inputs can drive the power consumption up. So a warm chip does not nedessary mean the chip is bad.
The JTAG interface may be a way to check if there is still a response, though even a broken chip may still respond to JTAG.

inaxeon:

--- Quote from: Kleinstein on March 30, 2022, 10:40:58 am ---CPLDs / PFPGAs do sometimes run quite hot. Also a shortet output or open inputs can drive the power consumption up. So a warm chip does not nedessary mean the chip is bad.
The JTAG interface may be a way to check if there is still a response, though even a broken chip may still respond to JTAG.

--- End quote ---

I would second that. I built something with one of those on a long time ago. It runs stupid hot. In the range suggested by that camera.

Le_Bassiste:
temp of CPLD is defo too high. also, tantalum capacitor at lower left corner of CPLD in your picture seems to be having a hard time.
you may want to check frequency of clock lines that go into CPLD. CPLD is mostly controlling analog switches, so watch out for those as well.

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