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Search found 4 matches

by Krischu
January 31st, 2015, 5:37 am
Forum: Older and Obsolete Signal Sources
Topic: TG501 Repair
Replies: 0
Views: 7512

TG501 Repair

I acquired a PM501 with some modules, among others a TG501 - Time Mark Generator (old style). The TG501 has some trouble. One of the FDN70 Fairchild 7 segment chips (the right one) has a dead segment, lowest one, so, an 8 appears a "A". I ordered a replacement part on the Internet (hopefully exchang...
by Krischu
December 27th, 2014, 6:18 am
Forum: Other or Discontinued Oscilloscopes
Topic: 2465B Error 05 44 Trouble Tracing Down Issue
Replies: 16
Views: 45496

Re: 2465B Error 05 44 Trouble Tracing Down Issue

I don't know whether the issue has been solved meanwhile. Anyway, since I have a similarly situated problem may I append it here: I have a 2445B which ran fine for some years but recently all of a sudden it stops during startup with Test 05 fail 44. I followed the trouble shooting flow chart and it ...
by Krischu
January 25th, 2010, 2:16 am
Forum: Other or Discontinued Oscilloscopes
Topic: 2445B no beam
Replies: 1
Views: 18473

Re: 2445B no beam

I'm new to this forum and I'm hoping to get help in repairing that instrument. After powering on it seems to me that selftest and logic operates fine. I can select channels and logic seems functioning. Only the CRT stays dark. No beam at all. Any ideas how I should proceed? I opened the cover of th...
by Krischu
January 18th, 2010, 4:36 am
Forum: Other or Discontinued Oscilloscopes
Topic: 2445B no beam
Replies: 1
Views: 18473

2445B no beam

I'm new to this forum and I'm hoping to get help in repairing that instrument. After powering on it seems to me that selftest and logic operates fine. I can select channels and logic seems functioning. Only the CRT stays dark. No beam at all. Any ideas how I should proceed? I opened the cover of the...

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