multifunction tester tc1 won't turn off - Page 1
Forum section: electronics / testgear

author: hussamaldean
author_rank: Unknown
timestamp: February 11, 2020, 04:41:44 pm
content: hi all,I have multifunction tester tc1, but the tester won't turn off at all. after while, \\it will reset and power one once more and the cycle repeats until the internal battery is deadhow to solve the issue since google search came up emptyregards

author: J-R
author_rank: Super Contributor
timestamp: February 11, 2020, 06:44:52 pm
content: It does sound like it is faulty. If you hold the button down, does it turn off?

author: hussamaldean
author_rank: Unknown
timestamp: February 11, 2020, 06:47:53 pm
content: Quote from: J-R on February 11, 2020, 06:44:52 pmno, it won'tI have for a year now, and it is working like a charmbut it developed this issue today

author: AVGresponding
author_rank: Super Contributor
timestamp: February 11, 2020, 06:54:28 pm
content: Easiest answer might be to add an on/off switch in the battery lead...

author: hussamaldean
author_rank: Unknown
timestamp: February 11, 2020, 06:55:40 pm
content: Quote from: ThickPhilM on February 11, 2020, 06:54:28 pmI am thinking in a switch and power plug for charging

author: klausES
author_rank: Regular Contributor
timestamp: February 12, 2020, 03:30:36 pm
content: You could test how it reacts when this circuit has been completely de-energized.However, this can only be done by completely disconnecting the lithium for a short time (battery empty is far from completely de-energized for the circuit).It was the only chance for me to reset him when he (it only happened once) didn't go out anymore.(At that time the display remained with fragments ...).Otherwise I would wish for my wish it would stay longer (ironic).It is so fast that you can hardly read / remember all the data before the display is off ...This is the only thing that annoys me about this thing. Otherwise it is really useful.

author: aristarchus
author_rank: Regular Contributor
timestamp: February 12, 2020, 04:33:35 pm
content: Maybe a firmware re-flash fixes it ?

author: hussamaldean
author_rank: Unknown
timestamp: February 12, 2020, 05:03:02 pm
content: Quote from: aristarchus on February 12, 2020, 04:33:35 pmmaybe but I am afraid that it will destroy my device

author: hussamaldean
author_rank: Unknown
timestamp: February 12, 2020, 05:04:14 pm
content: Quote from: klausES on February 12, 2020, 03:30:36 pmcould you please elaborate ?

author: Mechatrommer
author_rank: Super Contributor
timestamp: February 12, 2020, 06:16:55 pm
content: that daniu tester is a piece of shit when came from the seller/designer, but after me doing some HW modification and FW reflash, it works charmingly. the 2 capabilities that are best are high voltage tester (using step up transformer? inside) and built in battery, so whenever i need it i just grab and test without needing to plug to wallwart. the battery came with it can hold charges pretty well. here are some reference i recorded when doing the mod... and some attached pictures..https://www.eevblog.com/forum/testgear/tc1-lcr-meter-transistor-tester-fix/msg1622248/#msg1622248https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/msg1894127/#msg1894127https://lygte-info.dk/review/ComponentTester%20Multifunction%20Tester%20T1%20UK.htmlhttp://www.stcmicro.com/rjxz.htmlunfortunately you'll need some tools/programmers/skills to do it, not for faint hearted. after the mod, its the best. but if you dont want to mess with it, just trash it (it has some HW and FW issues) and buy the cheaper tester kit, the one without the nice enclosure (M328 LCD 12864 Transistor Tester Kit) preassembled. if you can go further with the mod, we are here to help (if memory can serve well), cheers and salam.

author: klausES
author_rank: Regular Contributor
timestamp: February 12, 2020, 08:42:01 pm
content: Quote from: hussamaldean on February 12, 2020, 05:04:14 pmSimply unsolder a wire of the battery, wait a minute and then solder again.You cannot say whether it will help in your case, but it is very easy to try it.Quote from: Mechatrommer on February 12, 2020, 06:16:55 pmWill read these threads.What would help me first would be to change the timeout.

author: andy3055
author_rank: Super Contributor
timestamp: February 12, 2020, 09:23:42 pm
content: Is it possible that the switch contacts under the start button are shorting somehow?

author: hussamaldean
author_rank: Unknown
timestamp: February 13, 2020, 05:31:48 am
content: Quote from: andy3055 on February 12, 2020, 09:23:42 pmthere is no such thing, I tried using continuity test using my multimeter and it does work like a charmQuote from: klausES on February 12, 2020, 08:42:01 pmmine came with battery adapter and I tried by removing it for couple minutes but it solved nothing

author: hussamaldean
author_rank: Unknown
timestamp: February 13, 2020, 09:00:02 am
content: I simulated a battery using my power supply and I ended up burnt deviceit needed like 1amp to operate

author: klausES
author_rank: Regular Contributor
timestamp: February 13, 2020, 11:03:56 am
content: Where is something burned ? On your power supply or tester ?What exactly is broken ?You have to tell a little more details ... and photos would be helpful.

author: hussamaldean
author_rank: Unknown
timestamp: February 13, 2020, 03:53:39 pm
content: Quote from: klausES on February 13, 2020, 11:03:56 amI threw it away and get back to the old with glcd 12864

author: grantb5
author_rank: Regular Contributor
timestamp: April 26, 2020, 08:41:18 pm
content: Curiously mine started doing this too. Normally it would turn off after maybe 10s, but now it stays on for much, much longer. Such a weird symptom. It certainly drains the battery much faster. It could inexplicably be related to the battery somehow. I've had it over a year now. If I learn anything I will report back.Apparently it's settable (with jumpers?):https://www.circuitspecialists.com/content/430516/csi-tc1.pdfAccording to the manual a long press will turn it off. After I charge it up I will play with it more. So strange.

author: hussamaldean
author_rank: Unknown
timestamp: April 26, 2020, 08:50:36 pm
content: Quote from: grantb5 on April 26, 2020, 08:41:18 pmmine started doing it too after a yearwhat a coincidence