Comments on: GENT OF LEICESTER XC408 CHRONOPHER 3 MASTER CLOCK REPAIR https://jestineyong.com/gents-xc408-master-clock-repair/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Wed, 09 Aug 2023 08:14:38 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: Sherif https://jestineyong.com/gents-xc408-master-clock-repair/comment-page-1/#comment-405515 Wed, 09 Aug 2023 08:14:38 +0000 https://jestineyong.com/?p=21659#comment-405515 please , can you tell me what is the output from the device ? , I mean the clock input , thank you in advance .

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]]> By: Alireza https://jestineyong.com/gents-xc408-master-clock-repair/comment-page-1/#comment-375848 Fri, 10 Sep 2021 21:45:36 +0000 https://jestineyong.com/?p=21659#comment-375848 Hi.
I don't writing and speak English,
Excuse me.
I repair battery of clock xc408
Consist of:
1-Power supply and ups mode mean well
2-Battery 12v2.3a
3-Module xl6009
4-8 slave clock original for xc408

Power supply is charger for battery and supply 13.8 v DC
Out put of power joint to xl6009 that convert 13.8 to 28 v DC
Out put of module joint to diode bridge on the board of clock.

For another information please ask me.
Thanks

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]]> By: Albert van Bemmelen https://jestineyong.com/gents-xc408-master-clock-repair/comment-page-1/#comment-368377 Tue, 28 Apr 2020 05:11:38 +0000 https://jestineyong.com/?p=21659#comment-368377 Important note: I noticed that the TL866A programmer as IC tester is unable to test most counters like the CD4024, the 7490 and the 7492, because it can't check any of them. (not in the support device list!). But the Genius G540 universal programmer tester does in that respect a bit better because it would recognize a bad CD4024 counter chip. Sadly doesn't do the 7490 or 7492 either!

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]]> By: Albert van Bemmelen https://jestineyong.com/gents-xc408-master-clock-repair/comment-page-1/#comment-368363 Mon, 27 Apr 2020 09:07:46 +0000 https://jestineyong.com/?p=21659#comment-368363 In reply to Andrea Del Corso.

Yes, Thanks Andrea! And often we are only able to fix circuits and devices after a bit of reverse engineering was done first. Which I like too!

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]]> By: Albert van Bemmelen https://jestineyong.com/gents-xc408-master-clock-repair/comment-page-1/#comment-368355 Sun, 26 Apr 2020 06:40:18 +0000 https://jestineyong.com/?p=21659#comment-368355 I am glad I could save this XC408 Master clock for my friend, Humberto. My watchmaker friend Charles told me that they chose this higher 24V pulse output signal because a strong pulse is needed to sync-control many Slave clocks in series over long wire distances. Given your example it would leave only about 24V/60V for every slave clock. Which I guess is no problem if the signal is amplified electronically in every clock. But I've not seen the internal circuit of a Slave clock yet. Maybe fixing a Slave clock will be the subject in a future article. We'll never know what my watchmaker friend has in store next.

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]]> By: Humberto https://jestineyong.com/gents-xc408-master-clock-repair/comment-page-1/#comment-368351 Sun, 26 Apr 2020 00:14:33 +0000 https://jestineyong.com/?p=21659#comment-368351 Hi Albert, this article recalled me when I was just graduated from the University, I worked in a huge Factory and one day we had to fix the Master Clock similar to this one(Czech made)and later we synchronized about 60 Slave Clocks inside the whole Factory. Thanks for the article.

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]]> By: Albert van Bemmelen https://jestineyong.com/gents-xc408-master-clock-repair/comment-page-1/#comment-368339 Sat, 25 Apr 2020 06:39:22 +0000 https://jestineyong.com/?p=21659#comment-368339 In reply to Albert van Bemmelen.

By-the-way: Only 2 of my portable battery operated universal digital IC tester failed totally in testing the bad CD4024 7bit counter correctly!
I also have at least 2 other PC controlled IC testers that passed the test in disapproving the bad chip. They are the Elektor March 1998 IC tester, the Xeltek SP/L Super Pro L universal programmer. (and probably also the Genius G540 and the TL866A, but I just have not tested them yet with the bad counter chip).

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]]> By: Andrea Del Corso https://jestineyong.com/gents-xc408-master-clock-repair/comment-page-1/#comment-368334 Fri, 24 Apr 2020 12:52:05 +0000 https://jestineyong.com/?p=21659#comment-368334 Compliment Albert!Another big repairing with complete explanation of the job.
Only your passion for electronics can do!

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]]> By: Albert van Bemmelen https://jestineyong.com/gents-xc408-master-clock-repair/comment-page-1/#comment-368320 Thu, 23 Apr 2020 15:34:44 +0000 https://jestineyong.com/?p=21659#comment-368320 Thank you Greenford William, but therefore I think you are, like my watchmaker friend, a much better educated man in clocks and watches then I am. I never followed any training in fixing those tiny special mechanical and/or electronic watchmaker parts. Fixing mechanics is just not my thing. My best regards to you.

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]]> By: Greenford William Mafuleka https://jestineyong.com/gents-xc408-master-clock-repair/comment-page-1/#comment-368318 Thu, 23 Apr 2020 14:07:49 +0000 https://jestineyong.com/?p=21659#comment-368318 As indicated before you are great men. I tried and did halfway clock and watch repair Hological training with UK online training. It was tough because parts are very small and need to be very careful. Regards. Greenford William Mafuleka

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