Weir HSS100 PSU

[Iain Wilkie]

I have a strange problem with aWeir HSS 100 power supply. If its left off
for
maybe 10-15 mins it fires up ok, but switch it off and back on after a few
seconds or
minutes, it doesn't start. Checked all the electrolytics etc, etc, off
load/on load, no
joy.
Anyone else had this type of fault, or better still, anyone got a schematic
?
Willing to pay.

Thanks in advance

Iain

--

http://www.wilkie-electronics.co.uk

Wilkie Electronics
16, Muirhall Terrace
Perth
PH2 7ES
Scotland
United Kingdom

Tel/Fax +44 (0)1738 621492

 

[Clint Sharp]

I have a strange problem with aWeir HSS 100 power supply. If its left off
for
maybe 10-15 mins it fires up ok, but switch it off and back on after a few
seconds or
minutes, it doesn't start. Checked all the electrolytics etc, etc, off
load/on load, no
joy.
Anyone else had this type of fault, or better still, anyone got a schematic
?

Try discharging the main filter capacitor(s) with a high wattage low
value resistor (obviously with power removed) and see if it will restart
quicker, if it does you've got a capacitor bad, check the start-up
circuit for nasty little 47uF (or thereabouts) capacitors and associated
high value resistors (100k-470k)

 

[JANA]

It sounds like there is a thermo sensitive component. Get some freeze spray
and a heat gun. You will have to use the process of heating and cooling the
components in sequence to the power cycling to find the faulty component(s).
Most likely it is a bad cap.

--

JANA
_____

I have a strange problem with aWeir HSS 100 power supply. If its left off
for
maybe 10-15 mins it fires up ok, but switch it off and back on after a few
seconds or
minutes, it doesn't start. Checked all the electrolytics etc, etc, off
load/on load, no
joy.
Anyone else had this type of fault, or better still, anyone got a schematic
?

Try discharging the main filter capacitor(s) with a high wattage low
value resistor (obviously with power removed) and see if it will restart
quicker, if it does you've got a capacitor bad, check the start-up
circuit for nasty little 47uF (or thereabouts) capacitors and associated
high value resistors (100k-470k)