Sencore LC77 Schematic or service manual needed. - Page 1
Forum section: electronics / testgear

author: AB9GO
author_rank: Contributor
timestamp: September 26, 2017, 05:02:37 pm
content: Hello all,Looking for a Sencore LC77 Schematic or service manual. I have found the users or owners manual for the LC77 but not the service manual. Anyone have a lead on one?Just picked one up and would like to get it going again. Takes up much less room that my Sprauge TO-6A plus it is battery operated so I can take it to hamfests or radioswaps and check out the caps or transformers I am buying without the trouble of finding an outlet. A real pain when the swap in in a parking lot or field.Thanks,Randy AB9GO

author: Quarlo Klobrigney
author_rank: Super Contributor
timestamp: November 28, 2017, 10:26:43 am
content: Yeah what that guy just said...Me too. Can't find it anywhere. I need it to repair the LC101. It too is unobtainium.Anybody?

author: kripton2035
author_rank: Super Contributor
timestamp: November 28, 2017, 10:41:04 am
content: topic subscribed ...

author: coromonadalix
author_rank: Super Contributor
timestamp: November 28, 2017, 12:04:52 pm
content: search for the LC102 supposed to be identical or almost identical .... unobtanuim toothere a few mention of it here on eevblog

author: ruairi
author_rank: Frequent Contributor
timestamp: November 30, 2017, 02:04:30 am
content: Hi guys,I have an LC77 with original schematics that I am literally boxing up tonight to sell. I don't have time to scan properly and I don't have photoshop anymore to tidy up the scans so I've laid the schematics out and taken quick iPhone photos of every page.Can someone else rotate and crop these into something useful for everyone?This is not a permanent link so grab them and feel free to tidy up and reupload to some place useful.https://spaces.hightail.com/receive/a2MeZDC4AG

author: Johnny10
author_rank: Frequent Contributor
timestamp: November 30, 2017, 02:32:41 am
content: LC 102 Manual is located here:https://elektrotanya.com/sencore_lc102_auto-z_capacitor-inductor_analyzer.pdf/download.htmlHas schematics, parts list, Board reference pics.Schematics are a bit chopped but I printed them out and taped together.

author: Johnny10
author_rank: Frequent Contributor
timestamp: November 30, 2017, 02:54:25 am
content: I don't know the problem with your unit but I have fixed a few Sencore LC102 units.Connector issues were in both units.They used a sharp v-slotted wire type connector which cut too deep into the wires inserted and after a few removals the wire would break.Very difficult to diagnose unless you were looking specifically for the problem.

author: Quarlo Klobrigney
author_rank: Super Contributor
timestamp: December 05, 2017, 09:01:11 pm
content: Thanks for the links, I did check Elektrotanya and did not see the 101 or 102. My issue is it is way out of spec compared to my LC75. Maybe a pot twiddle or a defective component.We'll see.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 16, 2025, 02:07:38 am
content: years later here you can find many docs for the lc102 ...https://bama.edebris.com/manuals/sencore/lc102here's for the lc77 :https://bama.edebris.com/manuals/sencore/lc77since KO4BB is having problems once in a while