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Electronics => Repair => Topic started by: Paulo Rato on August 01, 2020, 07:47:58 pm

Title: Hitachi V-660 oscilloscope is shrinking the stroke
Post by: Paulo Rato on August 01, 2020, 07:47:58 pm

My Hitachi V-660 oscilloscope is showing a defect it is shrinking the line and I need help to fix it, thanks in advance

Title: Re: Hitachi V-660 oscilloscope is shrinking the stroke
Post by: George Edmonds on August 02, 2020, 01:55:28 am

 :-BROKE

Hi first check the power supplies, but be careful they are switch mode

George

Title: Re: Hitachi V-660 oscilloscope is shrinking the stroke
Post by: Paulo Rato on August 02, 2020, 02:38:38 pm

already checked friend and everything is fine.

Title: Re: Hitachi V-660 oscilloscope is shrinking the stroke
Post by: SilverSolder on August 02, 2020, 04:04:27 pm

Have you got the service manual?

Title: Re: Hitachi V-660 oscilloscope is shrinking the stroke
Post by: Paulo Rato on August 02, 2020, 04:32:44 pm

https://mega.nz/file/uMt2zQiT#584Mxxu3S8IuSTqq669yHTCyJ-3hfG_2P1ffHZkpDwA

Title: Re: Hitachi V-660 oscilloscope is shrinking the stroke
Post by: madao on August 02, 2020, 04:35:23 pm

and pleas check HV,, probably is HV to much high.  (small and bright picture = to much HV )


greetings
matt