Dear club colleagues, I'm forwarding the attached on behalf of Neil, if
you have feedback or can help Neil please contact him directly at
neil@xxxxxxxxxxx
73 Keith
-----Original Message-----
From: Neil Bernard <neil@xxxxxxxxxxx>
To: keithlbird <keithlbird@xxxxxxx>
Sent: Fri, 28 Aug 2015 18:16
Subject: Help required - Bench PSU Help (TTi 1810R) *******
Hi WKARS team
Bench PSU Help (TTi 1810R)
Ive been donated a very fine 18V 10A Bench supply, if I can fix it.
Doesn't power up, you get the familiar tick-tick of a switch mode trying to
start. TTI supplies are good supplies so worth fixing. The primary side seems
ok, and the mains input fuse hasn't blown. With the exception of the incoming
mains reservoir cap which is fine, there are only about 7 other electrolytics,
so i've ordered some low ESR replacements and we can give that a whirl first by
changing them. I did check a couple out of circuit and my ESR meter shows them
to be ok.. but its always hit and miss. All the main rectifier diodes seem ok
and are not short or open....a quick poke at a few key resistors didn't show up
much either..
Ive had a poke around a few key voltages and I do have a service manual
(https://www.dropbox.com/s/txkn4byzkdsvfiw/EX1810R%20Service%20Manual.pdf?dl=0)
althoung the silk screen doesn't always match.
Getting stuck now, any thoughts or help… much appreciated.
Neil
M6DWU
neil@xxxxxxxxxxx
