Thandar TG503 service manuals? - Page 1
Forum section: electronics / testgear

author: mikeys
author_rank: Contributor
timestamp: April 08, 2016, 10:09:19 am
content: I purchased a TG503 off of ebay recently, mostly just because I've used one (or one of it's siblings) in the Uni labs for a while and they seem alright, and the price it was going for was under half of what the refurb places are selling this model for in the UK. Anyway, it appears faulty and I'm struggling to find a service manual online. Does anyone have any documents for these?

author: alanb
author_rank: Frequent Contributor
timestamp: April 08, 2016, 01:25:12 pm
content: Have you triedhttp://www.ttid.co.uk/support

author: mikeys
author_rank: Contributor
timestamp: April 08, 2016, 02:08:15 pm
content: Thanks for the suggestion, I hadn't thought to look at the manufacturer's site since it's an old product. They had nothing available on the website but I've sent them a request in case they have anything available that's not on show.

author: MrSlack
author_rank: Frequent Contributor
timestamp: April 10, 2016, 11:50:21 am
content: If you send them a req they usually reply with a ZIP with a PDF in it with service information. TTI are pretty good at this

author: Fraser
author_rank: Super Contributor
timestamp: April 10, 2016, 12:10:23 pm
content: The TG503 manual is only available in paper form from TTi. They charge a 'no profit' fee of £25 for the manual.The TG502 service manual can also be used to aid repairs on a 503.I have A 503 in my pile of kit that I will be selling. Just scratchy pots need sorting with a clean.FraserCorrection ---- TTi do not have a copy of the TG503 service manual. They supply the similar TG501 service manual pdf for free

author: MrSlack
author_rank: Frequent Contributor
timestamp: April 10, 2016, 12:31:23 pm
content: I'd have that off you if it was one of their sweep gens

author: Fraser
author_rank: Super Contributor
timestamp: April 10, 2016, 12:38:48 pm
content: This thread may be of help/interest.It provides links to the only available service data, now stored at the KO4BB site.https://www.eevblog.com/forum/reviews/elderly-thurlby-thandar-tg502-functionsweep-generator/TG501 SMhttp://www.ko4bb.com/getsimple/index.php?id=download&file=06_Misc_Test_Equipment/Thurlby_TTi/Thurlby_Thandar_TTi_TG501_Function_Generator_Service_Manual-TG501ServiceManual.pdfTG502 Schematichttp://www.ko4bb.com/getsimple/index.php?id=download&file=06_Misc_Test_Equipment/Thurlby_TTi/Thurlby_Thandar_TTi_TG502_Function_Generator_with_Sweep_Service_Manual-TG502MainandSweepdiagrams.pdfFraser

author: Saturn
author_rank: Newbie
timestamp: August 15, 2017, 11:11:45 am
content: From Same site as above TG 503 Circuit Diagrams -http://www.ko4bb.com/manuals/80.229.192.65/Thurlby_TG-503_Function_generator_with_pulse_generator_Service_Manual.zipDid you find a Service Manual ?, I have one but the Sine & Ramp functions don't seem to work, Rest look OK

author: mikeys
author_rank: Contributor
timestamp: August 20, 2017, 01:28:10 pm
content: Saturn,I couldn't find the specific service manual for the model but tti sent me what they could, and I'm pretty sure I uploaded that to one of the archive sites. Mine had something like a blown op amp in the output stage and I ended up sending it back to the seller, as I didn't have access to my tools at the time. From what I remember the schematic was fairly easy to figure out.I'll dig about in my emails and see if I can find the material TTI sent me, but can't promise anything since my mailboxes are absolutely tragic.