[TechAssist] Re: Tektronix 485 Oscilliscope - Power Supply Cycling ON/OFF
- From: "Wally Heise" <sirepair@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 21 Feb 2005 22:29:05 -0600
David,
I don't know if the 485 is similar to the 465 scope, but my 465 died last
year. I traced the problem to the sealed high voltage module which is no
longer available from Tektronix. My scope would power up when I removed
this module, except no high voltage of course. I still have service manual
but gave the scope to a friend. Hope that helps in troubleshooting it.
Wally Heise
South Isle Repair
Isle, Mn.
sirepair@xxxxxxxxxx
----- Original Message -----
From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: February 21, 2005 7:31 PM
Subject: [TechAssist] Tektronix 485 Oscilliscope - Power Supply Cycling
ON/OFF
> Hello All, My week just got tougher, my scope failed today. I may need a
scope to fix my scope. When powered "ON" I can hear the power supply
cycling - on/off/on, etc. The rear fan starts to spin and panel lights start
to light up but only when the power supply is on for that brief 1/2 second.
Would anyone have a schematic of the power supply or tips.
> Thank you,
> David Lessard
> mr_fixit@xxxxxxxxxxxx
>
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