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Products => Test Equipment => Topic started by: AB9GO on September 26, 2017, 05:02:37 pm

Title: Sencore LC77 Schematic or service manual needed.
Post by: AB9GO on September 26, 2017, 05:02:37 pm

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 radio
swaps 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

Title: Re: Sencore LC77 Schematic or service manual needed.
Post by: Quarlo Klobrigney on November 28, 2017, 10:26:43 am

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?

Title: Re: Sencore LC77 Schematic or service manual needed.
Post by: kripton2035 on November 28, 2017, 10:41:04 am

topic subscribed ...

Title: Re: Sencore LC77 Schematic or service manual needed.
Post by: coromonadalix on November 28, 2017, 12:04:52 pm

search for the LC102  supposed to be identical or almost identical ....  unobtanuim too

there a few mention of it  here on eevblog

Title: Re: Sencore LC77 Schematic or service manual needed.
Post by: ruairi on November 30, 2017, 02:04:30 am

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

Title: Re: Sencore LC77 Schematic or service manual needed.
Post by: Johnny10 on November 30, 2017, 02:32:41 am

LC 102 Manual is located here: https://elektrotanya.com/sencore_lc102_auto-z_capacitor-inductor_analyzer.pdf/download.html

Has schematics, parts list, Board reference pics.

Schematics are a bit chopped but I printed them out and taped together.

Title: Re: Sencore LC77 Schematic or service manual needed.
Post by: Johnny10 on November 30, 2017, 02:54:25 am

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.

Title: Re: Sencore LC77 Schematic or service manual needed.
Post by: Quarlo Klobrigney on December 05, 2017, 09:01:11 pm

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.