Nordmende WM3335 Sweep Generator. - UK Vintage Radio Repair and Restoration Discussion Forum

lucavic · 21st Oct 2020, 11:24 am

Hi dear All,
let me introduce myself I'm luca from Italy,
so apologize for my poor english.
I have this sweep marker model
nordmende WM3335
but no sweep output and no marker spectrum.
Is ther anyone who can help me in repair it?

ps I have pdf service manual with schematics but 13Mb too fat
to attach. I can send it thru email.

many thanks

Diabolical Artificer · 22nd Oct 2020, 4:58 am

Hi Luca, welcome to the forum. As with any bit of gear start with a thorough visual examination looking for loose wires, burnt/exploded components and bulging electrolytic capacitors,then its a matter of checking the power supply and other voltages.

When I need help with a problem, I ask my question and attach screenshots of relevant sections of a device, like the power supply and in your case a block diagram and sweep OP section. So,find the right page/schematic, screenshot, so you have a good quality image. Some decent pics of the device would help too.

Andy.

lucavic · 23rd Oct 2020, 5:31 pm

hi Andy,
I checked voltages outputs of power supply unit and are all ok.
horizontal signal for x axis of the oscillosco is ok to.
Low frequency oscillators 1MHz to 50Mhz are ok too.
But I can't check higher frequency oscillations with my 60MHz oscilloscope.

21st Oct 2020, 11:24 am	#1
lucavic Diode Join Date: Oct 2020 Location: Modena, Italy. Posts: 2	Nordmende WM3335 Sweep Generator. Hi dear All, let me introduce myself I'm luca from Italy, so apologize for my poor english. I have this sweep marker model nordmende WM3335 but no sweep output and no marker spectrum. Is ther anyone who can help me in repair it? ps I have pdf service manual with schematics but 13Mb too fat to attach. I can send it thru email. many thanks

22nd Oct 2020, 4:58 am	#2
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 5,729	Re: Nordmende WM3335 Sweep Generator. Hi Luca, welcome to the forum. As with any bit of gear start with a thorough visual examination looking for loose wires, burnt/exploded components and bulging electrolytic capacitors,then its a matter of checking the power supply and other voltages. When I need help with a problem, I ask my question and attach screenshots of relevant sections of a device, like the power supply and in your case a block diagram and sweep OP section. So,find the right page/schematic, screenshot, so you have a good quality image. Some decent pics of the device would help too. Andy. __________________ Curiosity hasn't killed this cat...so far.

23rd Oct 2020, 5:31 pm	#3
lucavic Diode Join Date: Oct 2020 Location: Modena, Italy. Posts: 2	Re: Nordmende WM3335 Sweep Generator. hi Andy, I checked voltages outputs of power supply unit and are all ok. horizontal signal for x axis of the oscillosco is ok to. Low frequency oscillators 1MHz to 50Mhz are ok too. But I can't check higher frequency oscillations with my 60MHz oscilloscope.