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Search found 4 matches

by costas
October 6th, 2012, 11:02 am
Forum: Series 2000 and Series 2100 DMM's
Topic: Series 2000 EEPROM Issue
Replies: 15
Views: 44090

Re: Series 2000 EEPROM Issue

Hello , I used experimental 2000a20.x file , programmed and split two free memory (29F040) with Labprog48 but my DMM not boots (all segments would light and remain on ) , I have revision A13..OK What can be wrong programmer splits alone in Even and odd files . Looking for 2015 firmware revision B07 ...
by costas
October 6th, 2012, 10:13 am
Forum: Series 2015 & 2016 THD/Audio Analyzers
Topic: Repair Keithley 2000 2015THD
Replies: 2
Views: 13493

Re: Repair Keithley 2000 2015THD

Hello For the many errors found defective circuit is about R271 = TF-245, but do not know what the equivalent circuit can replace, repair manual specified as RES NET circuit. I compared it with ohmmeter with a good track but we found significant differences may be a range of electrical resistance, b...
by costas
September 27th, 2012, 10:55 pm
Forum: Series 2015 & 2016 THD/Audio Analyzers
Topic: Repair Keithley 2000 2015THD
Replies: 2
Views: 13493

Re: Repair Keithley 2000 2015THD

Hello , At Keithley 2000 I measured all voltages after repair manual is within the tolerances , reference voltage of 7V (U141 LM399 ) which I suspected is 6.98 , the more I replaced several of the analog IC's (mux-u163, u165 ADC, u113, u115, u129, u166, u132 operational amplifiers) but errors not di...
by costas
September 27th, 2012, 1:35 am
Forum: Series 2015 & 2016 THD/Audio Analyzers
Topic: Repair Keithley 2000 2015THD
Replies: 2
Views: 13493

Repair Keithley 2000 2015THD

Hello, I have two flawn Keithley multimeters:2000 and 2015THD. For the 2015THD I would need the content of the two memories of 27C020 ( U156 , U157 version B07 ). It starts when I put the memories from 2000 but i don't think it is working in the normal parameters...where could I find the memory cont...

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