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220 Current Source error 11111 1

200, 210, 220, 486/7, 60x, 61x, 64x Electrometers
409, 41x, 42x, 44x, 48x -
14x, 18x, 1801 Nanovoltmeters
15x, 18x Null Detectors/Microvoltmeters
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r-wilder
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Joined: January 23rd, 2014, 1:28 pm
Country: United States

220 Current Source error 11111 1

Post by r-wilder » January 23rd, 2014, 1:41 pm

Hello,
I'm repairing a 220 for re-sale. After the P.O.S.T. lights up all segments for a few seconds it displays "11111 1" (not flashing). All buttons are non-responsive. Is this a crc error in rom 1? All p.s. Voltages measure correct. Any ideas?

Thanks in advance,

Richard Wilder

Dale C
Keithley Applications
Keithley Applications
Posts: 2842
Joined: June 10th, 2010, 6:22 am
Country: United States
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Re: 220 Current Source error 11111 1

Post by Dale C » January 24th, 2014, 8:36 am

Model 220 is long obsolete. My best guess is...
Display should light up as 1.888888 not 1.111111
Maybe display cable or driver chip?

r-wilder
Posts: 3
Joined: January 23rd, 2014, 1:28 pm
Country: United States

Re: 220 Current Source error 11111 1

Post by r-wilder » January 24th, 2014, 9:27 am

Thanks Dale,
All the display segments and all the LEDs light up during post so I'm assuming the cable & drivers are OK. Is 11111 1 a valid error code?

Thanks in advance,
Richard Wilder

Dale C
Keithley Applications
Keithley Applications
Posts: 2842
Joined: June 10th, 2010, 6:22 am
Country: United States
Contact:

Re: 220 Current Source error 11111 1

Post by Dale C » January 24th, 2014, 10:17 am

Not that I know of.
This is probably a component level troubleshoot.
Not sure what the next step would be.
Model 6220 is the replacement for the Model 220.

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