Wavetek 1281 Self test error - Page 1
Forum section: electronics / general

author: Ugur
author_rank: Regular Contributor
timestamp: October 10, 2024, 10:24:38 am
content: Hello Guys,The device gives the error message 9006 when it first starts up, and no action can be taken. Do you have any comments about this problem?Explanation of this error code in the manual."option test failure"

author: TheSteve
author_rank: Unknown
timestamp: October 10, 2024, 08:08:36 pm
content: Was it previously working ok? If options are removed jumpers need to be changed so it doesn't try to communicate with them.

author: TheDefpom
author_rank: Frequent Contributor
timestamp: October 11, 2024, 02:27:29 am
content: I would say to just open it up and check for loose stuff such as cables etc.Failing that I will give you $100 for it...seeing as its broken and everything :-)

author: Bryn
author_rank: Regular Contributor
timestamp: October 11, 2024, 04:56:36 am
content: Could be a hardware malfunction or something's went wrong with the firmware all of a sudden. Try opening it up for any loose connections like what TheDefpom said, update its firmware where possible and also recalibrate it if needed.

author: Ugur
author_rank: Regular Contributor
timestamp: October 11, 2024, 06:02:49 am
content: hello,High voltage was applied to the inputs of the device. Parts such as relays and resistors are broken. I wish there was a problem with the connection cables, but the connection cables are good. The cosmetic condition of the device is also very good considering its age.I checked last night and replaced the broken M404-ULN2003 and Q106-2N3904 on the AC assembly board with new ones.Now the error code has changed. It now gives error 9005. But I noticed that the LTZ1000 references are getting hotter than the other parts.Also, U501-UC3524AN on the Digital Assembly board is getting hotter than the others.

author: Arhigos
author_rank: Regular Contributor
timestamp: October 11, 2024, 09:46:19 am
content: I would suggest - disable all options using the jumpers and start troubleshooting DC board itself first

author: Kleinstein
author_rank: Super Contributor
timestamp: October 11, 2024, 03:17:28 pm
content: Removing all options is a good idea. It makes the system a bit simpler. Fixing the AC part comes later.Another point is checking the supplies, as the UC3524 is part of the supply. It should not get especially hot.The LTZ1000 are reference with heater to a elevated temperature. So a bit warmer operation is normal.

author: TheDefpom
author_rank: Frequent Contributor
timestamp: October 11, 2024, 11:02:03 pm
content: Agreed, strip it back it its most basic function, disableand unplugthe options to eliminate them temporarily, and work on what is left.Check all power rails, both for correct DC and for excess AC ripple, it could be a coincidence that it failed but a bit of extra load on a rail from a faulty IC could bring a marginal rail to the point of failure.Or just give up on it and sell it to me :-)

author: Ugur
author_rank: Regular Contributor
timestamp: October 15, 2024, 05:52:19 am
content: Hello,I changed the UC3524s but the error did not change. When I checked further, I measured the M704 and M705 optocoupler supply inputs on the DC Assembly card as 140 ohms. But when I remove the connection cable with the Digital Assembly card and measure it, the ohm value increases as it should. When I remove the U102 (MC68000) microprocessor on the Digital Assembly card, the ohm value on the supply legs of the optocouplers corrects. I found this integrated circuit on the market as a second hand. However, when it is measured as 140 ohms, 5V comes correctly when I turn on the device. This made me suspicious.

author: Ugur
author_rank: Regular Contributor
timestamp: October 23, 2024, 02:06:35 pm
content: Hello ,When I remove all the options I get the error message "9005.9 Pon Tru/Compl".I replaced 2 qty UC3524 with new ones.I measured that one IRF9530 was faulty and replaced it with a new one.I replaced the MC68000.I replaced all the optocouplers and 74HC244 digital IC's with new ones.All voltages are correct and stable. I still haven't found the reason for this error.

author: Birb
author_rank: Contributor
timestamp: October 24, 2024, 01:28:41 am
content: Hi,Don’t know if this will be helpful, but I hope it is:https://www.febo.com/pipermail/volt-nuts/2016-April/004757.htmlQuoteAccording to this it may be due to option boards being disconnected, which should happen as you’ve removed them.

author: Ugur
author_rank: Regular Contributor
timestamp: October 24, 2024, 01:51:10 pm
content: Hello Birb,Thank you for the support.Actually I'm afraid this is the error.Xdevs also shared a drawing of the card needed to program the RAMs. I want to look at this device a little more. This option should be the last resort for me.https://xdevs.com/fix/d1281/