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Electronics => Repair => Topic started by: syau on June 23, 2020, 11:43:56 pm

Title: Tek SG5030 E350 error
Post by: syau on June 23, 2020, 11:43:56 pm
Scored a SG3050 with level head, it will throw a E350 error after output enable for a few seconds. Googled and found not much information in repairing this unit.

Will tear it apart and see if any obvious things happened.
Title: Re: Tek SG5030 E350 error
Post by: picburner on June 24, 2020, 10:58:33 am
You can find something here (http://w140.com/tekwiki/wiki/SG5030).
There is also the manual with the schematics.
Title: Re: Tek SG5030 E350 error
Post by: picburner on June 24, 2020, 11:13:03 am
and this is the answer of the manual regarding the E350 error:
Title: Re: Tek SG5030 E350 error
Post by: syau on June 24, 2020, 03:24:03 pm
Open up the unit, smell fishy and all SMD capacitor leaking  :wtf:

[attach=1]

[attach=2]

Also, this type of PCB is my most dislike one as the pad tend to come off very easy  :--
Title: Re: Tek SG5030 E350 error
Post by: syau on June 24, 2020, 03:25:45 pm
Quote from: picburner on June 24, 2020, 11:13:03 am
and this is the answer of the manual regarding the E350 error:

Not much usable troubleshooting information / flow chart. But lucky schematic provided  :-+
Title: Re: Tek SG5030 E350 error
Post by: texaspyro on June 25, 2020, 06:30:33 am
Most levelng head problems that I have seen are due to contact issues with the relays.   The relays consist of a top part (head) that is screwed to the PCB.  It includes the magnets and a leaf spring contact on a pivot.  The contacts touch pads on the PCB.  Remove the relay heads,  inspect and clean (VERY carefully) the leaf springs,  and clean the PCB pads.
Title: Re: Tek SG5030 E350 error
Post by: wizard69 on June 25, 2020, 07:20:25 am
Best of luck with this unit.   It is obvious that a complete recap is needed.   Hopefully you will have a running unit.   I love this old Tektronix hardware, it is too bad they gave up on it.

Quote from: syau on June 24, 2020, 03:25:45 pm
Quote from: picburner on June 24, 2020, 11:13:03 am
and this is the answer of the manual regarding the E350 error:

Not much usable troubleshooting information / flow chart. But lucky schematic provided  :-+
Title: Re: Tek SG5030 E350 error
Post by: syau on June 25, 2020, 08:03:03 am
Quote from: wizard69 on June 25, 2020, 07:20:25 am
Best of luck with this unit.   It is obvious that a complete recap is needed.   Hopefully you will have a running unit.   I love this old Tektronix hardware, it is too bad they gave up on it.


All SMD cap leaking with corrosion around  :palm: Besides cap, ordered some resistor, capacitor, op amp. Spend whole day cleaning up the board with IPA.
Title: Re: Tek SG5030 E350 error
Post by: syau on July 06, 2020, 10:06:20 am
Received batch of Vishay Dale (VA) CRCW1206 1% resistor from Digi-key to replace those damaged by the leaking SMD capacitor and found they didn’t have value printed on top of  :wtf:

Wish me luck  :-BROKE