I figure that if the 12/24 hr switch goes bad again, I'll simply jumper the PCB contacts in the 24 hr position. I never use the alarm, so haven't touched that switch. However, I never switch from the 24 hour mode. I cleaned the grease and adjusted the contacts to provide more pressure against the PCB contacts.Īfter re-assembling, the clock has been functional ever since. I assume the grease was used to keep the switch from sticking, but this sort of grease is not a good idea for such low currents. In addition, there was 'contact grease' all over the contacts. There is no spring to maintain switch contact only the springiness of the contacts in the switch handle. They are not true switches at all, but simply a set of contacts on the PCB being bridged by spring contacts on the switch handle. The two switches (one for 12/24 hr, one for alarm on/off) are the cheapest junk I have ever seen. What I found when I opened the case was the switch selecting 12/24 hour was not making proper contact. I could have returned the clock to GigaParts where I purchased it, but decided to attempt repair myself, as I had a pretty good idea of what the problem was a bad solder joint. Upon first use, I found a glaring defect the left-most digit had segments missing.
I purchased the MFJ-113 24 hr LED clock in June 2020. It's nothing I would ever plan to sell, and it's head and shoulders better than the MFJ dual LCD battery operated clock (MFJ-108B) I used to use for the previous 10 years until the setting switches went bad. I'd buy it again for ten bucks if this one ever croaked. I got what I paid for and I'm happy with it. What can I say? It's just a run of the mill clock at a decent price. No fancy schmancy microprocessors, nor maps and sunlight profiles. It keeps time off of the 60Hz AC line frequency and uses a transistor radio 9VDC batter to back up the time during brown outs and even "not too long" AC outages. I found an AC outlet in the store, plugged it in, found it worked OK, and handed the counter guy ten bucks for it. It had a scratch on the red bezel, but nothing that made the clock hard to read. There it was sitting on the clearance table at HRO Milwaukee a few years ago.
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