UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Microvitec Cub 1431 Power but no picture.

qsilver · 7th Apr 2018, 12:44 am

Thank you again for the really helpful insight. I've been reading up on SMPSU's recently so is the 5W resistor you mention the "bootstrap" resistor that kick starts the SMPSU perhaps?

Would you recommend removing the circuit board and checking the underside? Would that help the measurement of the capacitors and resistors too? I don't think it would be easy to check the capacitors for charge without removing it.

Does that sound like a sensible first step?

7th Apr 2018, 12:44 am	#13
qsilver Retired Dormant Member Join Date: Jul 2010 Location: Carlisle, Cumbria, UK. Posts: 66	Re: Microvitec Cub 1431 Power but no picture. Thank you again for the really helpful insight. I've been reading up on SMPSU's recently so is the 5W resistor you mention the "bootstrap" resistor that kick starts the SMPSU perhaps? Would you recommend removing the circuit board and checking the underside? Would that help the measurement of the capacitors and resistors too? I don't think it would be easy to check the capacitors for charge without removing it. Does that sound like a sensible first step?