Autoranging CombiScope PM3380B full calibration Flash-ROM - Page 1
Forum section: electronics / repair

author: zoltanh
author_rank: Contributor
timestamp: February 19, 2023, 09:46:00 pm
content: Hi,I bought a broken CombiScope PM3380B and I repaired it however Flash-ROM is full. Ten saves have been done in the past. In service manual is saying that:"The Flash-ROM’s contain blocks of calibration data (of which the most recent block is valid) and theoperating software. After operation of softkey ’save calibr data’, the text ’XX CALIBRATION FIELDSFREE’ is displayed. XX can be a figure between 10 ... 1 or ’NO’. In case of ’NO’, the Flash ROM mustbe emptied and redundant blocks of calibration data must be removed. To have this done, send youroscilloscope to the nearest Service Center."There is no Service Center near to my location. Is somebody willing to help me to sort out the issue and free up Flash-ROM? I will really appreciate any help/advice.Thank you.

author: shakalnokturn
author_rank: Super Contributor
timestamp: February 20, 2023, 10:47:48 am
content: Have you tried searching the forum for Combiscope / PM3380 / PM3384 / PM3390 / PM3394 ?I can't remember if there was a solution but the question has been asked here at least once before your topic.

author: zoltanh
author_rank: Contributor
timestamp: February 20, 2023, 11:33:24 am
content: Thank you. Yes. I checked it and I did not find any answer to this issue.

author: kripton2035
author_rank: Super Contributor
timestamp: February 20, 2023, 11:39:52 am
content: Chatgpt answer...not sure it is the good one !!!Quote

author: kripton2035
author_rank: Super Contributor
timestamp: February 20, 2023, 11:44:43 am
content: QuoteQuote

author: kripton2035
author_rank: Super Contributor
timestamp: February 20, 2023, 11:46:22 am
content: Quotemore luck ?Quote

author: zoltanh
author_rank: Contributor
timestamp: February 20, 2023, 06:05:59 pm
content: Thank you. I will give a try. I did not think about asking AI.

author: zoltanh
author_rank: Contributor
timestamp: February 21, 2023, 12:03:36 pm
content: It does not work.

author: GioCosco
author_rank: Newbie
timestamp: February 21, 2023, 02:51:56 pm
content: Hi,very interesting thread. I have this problem with same scope too.There is also another thread about all scopes of this familyhttps://www.eevblog.com/forum/repair/fluke-philips-pm3394a-combiscope-preventive-maintenance/50/and there is an user which is supposed to have all the required stuff to reflash the firmware.BTW I have tried all key combinations with no success.I there are more ideas i will try them for sure.Regards

author: kripton2035
author_rank: Super Contributor
timestamp: February 21, 2023, 05:04:36 pm
content: Quote from: zoltanh onTodayat 13:03:36this does absolutely not surprise me. I would have been surprised if it had worked !if it had been a key combination like chatgpt tried to explain, it would have been on the service manual.pretty sure you need to re-flash the chip with some base calibration data nobody has.

author: KalleMp
author_rank: Newbie
timestamp: November 10, 2024, 08:23:51 am
content: It the site of the calibration data known?If it is a generic EEPROM IC and there is at least one remaining calibration slot it should be possible to save the contents to restore a earlier state or prepare clones of the IC with a suitable programmer.Even if the old data is out of calibration it should always remain readable and the scope will revert back to the old state with N slots left for future calibration.I know of one such scope that has what looks like a DIY rack mount bracket for sale for EUR80 about US$100 and thinking it would be a step up from a 20MHs scope.Kalle--Helsinki, Finland