Is this a good price for a HP 54645D? - Page 1
Forum section: electronics / testgear

author: poot36
author_rank: Frequent Contributor
timestamp: July 29, 2016, 04:01:27 am
content: I can get this scope LA combo for $100 but it does not work correctly and does not come with probes (I do have probes from a Tektronics 465 scope so that is no problem). It does power on but does not operate correctly according to the ad. Would bad caps or a dead Dallas ram module be the most likely fault in this model? I have sent the seller a message about what the self test reports.

author: PaulAm
author_rank: Frequent Contributor
timestamp: July 29, 2016, 10:08:51 pm
content: There is very limited service information available on these. Service was basically by board swap. If you are very good, you might be able to troubleshoot it.Does it have the logic pod? You can spend up to a couple hundred on that if it doesn't come with the scope.There were also piggyback modules for that scope that added fft and gpib or serial comm. Does it come with any? Those can be $50-150I have one that's all tricked out and I like it. But I would probably go for one that doesn't have any problems or more likely a 54622d. The 54622d is around the same price but is the 54645d replacement and the firmware can be updated.

author: poot36
author_rank: Frequent Contributor
timestamp: July 30, 2016, 02:26:57 am
content: I don't know if it has the logic pod but if it is like the HP 1660 series pods I would just use a floppy drive cable to my existing pod from my HP 1661C logic analyser. I have no clue as to what modules it comes with. Because I am in Calgary in Canada getting a scope here is fairly hard and the cheapest 54622d that I can find on eBay would cost over $400 once it gets here a 54645d on the other hand that is working but cosmetically beat up costs around $300 to $350. The seller has gotten back to me and says that the display is garbled. Would a bad rom chip cause this or could the video chip of the system be bad?

author: EEVblog
author_rank: Unknown
timestamp: July 30, 2016, 03:21:04 am
content: Bargain if you can fix it.Did Free_Electron mention on here that these models suffer from bad caps or some other PSU issue?

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: July 30, 2016, 04:23:39 am
content: Quote from: poot36 on July 30, 2016, 02:26:57 amGarbled could be logic garbled, random characters or it could be hardware in the monitor assembly. A picture of the garbled display would help.(In your first post you offered to send the seller a 'mAssage' I think you mean mEssage. Anybody who sent me a massagemayget a discount)Fixing a bad scope can be more exciting than buying a good one. Plenty of examples on the forum.Regards,Jay_Diddy_B

author: poot36
author_rank: Frequent Contributor
timestamp: July 30, 2016, 05:22:16 am
content: Ok, typo in original post has been fixed. As far as I can tell the place that is selling the scope + LA is a surplus re-seller for other companys. The website iswww.allsold.caif you want to check it out. I am not sure if bargaining would be on the table in this case. I guess I could wait a few weeks and then try offering them a lower price to see how desperate they are to move old product. I will ask for a picture of the screen but I don't have high hopes of getting one due to the aforementioned case. If I can get it for around $50 or so I may go for it.

author: Ice-Tea
author_rank: Super Contributor
timestamp: July 30, 2016, 06:43:30 am
content: Just a quick thought: these pods container RC Networks tobwork properly. Using a floppy cable isnotthe same.

author: poot36
author_rank: Frequent Contributor
timestamp: July 30, 2016, 06:01:30 pm
content: I have some pods from a HP 1661C Logic analyser that have the termination network in them. I just realised that a floppy drive cable does not have enough pins for the connector so I will have to use a IDE cable and remove some of the extra holes on the plug side.