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German
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 Posted: Sat Feb 06, 2016 3:07 am Post subject: Philips PM3200X osciloscope |
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| The focus control does not work the trace is blur. The intens control does not work, The potenciometer is ok the 1500 is ok. Could some ripple or filtering ? Please help |
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vtech
Joined: 08 May 2006
Posts: 1264
Location: USA
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| Posted: Sat Feb 06, 2016 5:42 am Post subject: |
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That is an ancient one. It may be a bad tube however you must have the 1500v and 90v on either end. It can also be filter cap(s) in power supply.
Focus pin#8 should change around 140~275V.
That will give you an idea. Check resistors in between the two voltages.
There is a detailed schematic here. Page 72 shows all the power supply outputs.
http://www.radiodatabase.nl/meetapparatuur/philips/PM3200/PM3200.htm |
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