Tektronix DPO4034 repair (encoder with broken pan/zoom shaft) - Page 1
Forum section: electronics / repair

author: Jwalling
author_rank: Unknown
timestamp: September 12, 2018, 04:11:22 pm
content: So I have a Tek DPO4034 that has a broken shaft on the pan/zoom control. The encoder is quite complex and it cannot be repaired. I explored drilling the shaft down the center and using a screw, but it's not built in such a way where that's possible at all.I'm not sure if this is a custom part or not; I suspect that it is, but I'm hopeful that it's not.The only marking on it is J07J28. At least I think that it's a zero.Has anyone ever seen one of these encoders or know who the manufacturer is, or whether it's custom made for Tek?I'm pretty sure that Tek will not sell the part, and offer only a replacement board for big bucks. These days, I guess they figure if soldering is required, the end loser can't fix it...Thanks!

author: pbarton
author_rank: Frequent Contributor
timestamp: September 15, 2018, 08:04:20 pm
content: I bought a TDS3014B with a broken encoder shaft. I managed to buy a damaged TDS3014B PCB with all the encoders in place. The shaft part of the encoder was attached to the PCB with 'hot melt' plastic rivets. So, its not difficult to remove the shaft half of the encoder. The other half of the encoder is actually part of the PCB. I swapped over the plastic encoder and the problem was fixed.Here is a relevant patent......http://www.google.com/patents/US6542089and Tektronix supplier is here....http://www.bourns.com/products/encoders/contacting-encodersTek sources from Bourns with the condition that Bourns are restricted to Tek sales. So these parts are proprietary, you will not be able to source the individual encoder.Your best chance is to find somebody who is parting out a DPO4034.

author: Jwalling
author_rank: Unknown
timestamp: September 16, 2018, 09:29:07 am
content: Quote from: FRR on September 16, 2018, 06:35:51 amI don't have the resources for that, unfortunately. Also the shaft is missing...I may end up buying a DPO2012 front panel from Tek. They want $252 for it!

author: Jwalling
author_rank: Unknown
timestamp: September 18, 2018, 09:48:06 am
content: Quote from: FRR on September 17, 2018, 08:20:36 amAs I said, I don't even have a part to model from, and, additionally, don't have the software or knowledge to do it anyway. I do appreciate the offer, though...I'll probably bite the bullet and buy a DPO2K front panel PCB from Tek. $252 - ouch.

author: coromonadalix
author_rank: Super Contributor
timestamp: September 18, 2018, 10:32:53 am
content: have you tried to ask for an part number at tektronixor if they have an part leftwell :this link doesn't show the encoder as a separate parthttps://doc.xdevs.com/doc/Tektronix/Tek%20DPO%2C%20MSO%204000%20Series%20Service.pdf

author: Jwalling
author_rank: Unknown
timestamp: September 18, 2018, 11:00:21 am
content: Quote from: coromonadalix on September 18, 2018, 10:32:53 amYes, I have contacted them in the last week. They don't sell any component-level parts for these. Only assembly level parts can be bought. Sucks as they are a high failure part as evidenced by all the broken ones I've seen on Ebay. The damn knob sticks out so far, and the shaft is hollow at the base. A pretty flimsy design...When I replace this one, I'll try to remember to follow up with some pictures of the internals.

author: TinLethax
author_rank: Regular Contributor
timestamp: October 08, 2025, 10:19:49 am
content: I know that this thread is very old but I think this might be useful for someone that need to replace this encoder. I found the part number for the zoom-pan (jog-shuttle) encoder. It's RDS-Y0004 from NOBLEhttps://web.archive.org/web/20060429062002/http://www.noble-j.co.jp/product/pdf/rds.pdf. It's quite an unobtanium For anyone want this, I saw it selling on Taobao right now.