EEVblog Electronics Community Forum

Electronics => Repair => Topic started by: vectra_1098 on April 10, 2019, 10:39:19 am

Title: Tektronix tds 460A PSU
Post by: vectra_1098 on April 10, 2019, 10:39:19 am
Hi ,

I have another Tektronix Scope a TDS 460A with a failed power supply.
Does anybody have any schematics/pcb layouts for this PSU ??

Thanks in advance...
Title: Re: Tektronix tds 460A PSU
Post by: pbarton on April 10, 2019, 09:56:24 pm
Some info here  https://www.eevblog.com/forum/repair/tds400-power-supply/msg2138764/#msg2138764 (https://www.eevblog.com/forum/repair/tds400-power-supply/msg2138764/#msg2138764)
Title: Re: Tektronix tds 460A PSU
Post by: Dacke on April 11, 2019, 12:05:00 am
There isn't really schematics available for the TDS *** scopes as far as I know.   When I rebuilt my TDS 420's power supply I used the schematic for a Lecroy 9354A power supply,  it is about 90% the same power supply,  you just have to be aware of the differences.  I'm not sure if the TDS 460 has a similar supply to the 420,  but a link is here:  http://bee.mif.pg.gda.pl/ciasteczkowypotwor/LeCroy/LeCroy_9354A-M-L-TM_Service_Manual_Complete.pdf (http://bee.mif.pg.gda.pl/ciasteczkowypotwor/LeCroy/LeCroy_9354A-M-L-TM_Service_Manual_Complete.pdf)  -  pages 8-195 and 8-196.
Title: Re: Tektronix tds 460A PSU
Post by: shakalnokturn on April 11, 2019, 11:40:49 am
Is it the PS-1690 model you have?
Title: Re: Tektronix tds 460A PSU
Post by: vectra_1098 on April 11, 2019, 05:10:46 pm
Hi,

The PSU has a TEK number on the top silk TEK 119-3939-02
I tried to send a jpeg photo but the site failed to send it

Thanks 
Title: Re: Tektronix tds 460A PSU
Post by: z80tw on April 11, 2019, 05:18:28 pm
Just fixed my TDS420A yesterday,couldn't power on.the LVPS failed on Line voltage 110V but worked on 220V,
I took out the power supply board and replaced the C10(22uf/50V).it works now.
Title: Re: Tektronix tds 460A PSU
Post by: vectra_1098 on April 11, 2019, 05:54:55 pm
Hi,

The photo you just sent, I am pretty sure its the same PSU as mine.

I do have problems though my GREEN Module is damaged and I have removed it from the PSU,
I do recall that there is some  schematics for them ?
 Somebody actually removed the green coating to reveal the circuit ?

Thanks

 
Title: Re: Tektronix tds 460A PSU
Post by: ctbully on April 11, 2019, 08:45:29 pm
You can find the service manual here https://elektrotanya.com   :)
Title: Re: Tektronix tds 460A PSU
Post by: shakalnokturn on April 11, 2019, 10:13:55 pm
Quote from: vectra_1098 on April 11, 2019, 05:54:55 pm
Hi,

The photo you just sent, I am pretty sure its the same PSU as mine.

I do have problems though my GREEN Module is damaged and I have removed it from the PSU,
I do recall that there is some  schematics for them ?
 Somebody actually removed the green coating to reveal the circuit ?

Thanks
Title: Re: Tektronix tds 460A PSU
Post by: maxxim on January 11, 2020, 06:15:26 pm
Hi, what is the value of the tantalum capacitor on the underside power supply pcb (hybrid pin 13-19).
Thanks