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My Creality Ender Pro just crapped out

275 Views 8 Replies 4 Participants Last post by  MadMark
:mad:
The microSD card reader won't keep the card in place. So I went to the web site and sent a help request for a new SD reader.
... time passes ...
chinese ideogram email says replacement is expensive, takes a long time to deliver, and to contact vendor.
Live chat w/Amazon starts out with "it's over 90 days old" and Out Of Warranty. After a bit of crying, Amazon agrees to "one time" deal: ship back unit for credit -- less $50 return fee. I agree and simultaneously order another one. Thus planning on sending the old machine back in the new machines box. Clever, I think to myself.
New machine shows up a few days later (actually two days early!) ... on the same day I get another chinese ideogram email asking for video of fail.
I send brief vid, and about 4hrs later, new email arrives, saying part is on way with two to three week ETA.
Ok, so I get online w/Amazon to return, just delivered and unopened, replacement machine. No problemo, I've got 30 days to return it.
More time passes, and part shows up in days, not weeks. Great!
Time to install replacement card. Machine came with bunch of metric allen wrenches, I figure tool will be in kit. Nope.
Card is under access cover with three screws that NONE of the supplied allen wrenches fit. Is oddball metric round head screw. Two have star lockwashers, and my compound linemens pliers, is able to grab the screws and I get TWO out. 3rd is missing lockwasher and try as I might, no go.
Plan B: Drill it out. This worked -- eventually -- but was harder than expected. Oh, and where DID those metal chip get to?
Finally! All three screws out! But ... panel isn't flat, it forms interior sidewall partition with 4th, hidden and inaccessable, top side screw. (sigh)
Sooo ... I BEND panel to FINALLY expose failed PCB. It's held in with four screws that DO fit one of the suppled allen wrenches and mometarily, card is out but still cabled.
There are about a dozen connectors, and two groups of terminals, with a total of eight wires in four pairs. Making sure to take pics before starting, I discover that the connectors each have been GLUED together with a dab of RTV silicon adhesive caulk. Oh joy!
Circuit component Electrical wiring Electronic engineering Electronic component Computer hardware

You can see drops of sealant on edges of white connectors ...

After some Exacto knife work, pulling and tugging, I manage to transfer, one-by-one, the wiring from the old card to new, get it installed, re-bend the cover back in place (sorta, close enuf) and flip it back over.
After reconnecting the power cord, the moment of truth arrives, and I flip the switch. A moment passes and ... the buzzer starts beeping Morse code or garbage, the display shows the splash screen with some defects and thats it. Garbled beeps and a crappy display. No joy in Muddville, Casey, mighty Casey, has struck out. :(
Ok, fortunately I have a brand new machine, in the box, sitting on the front entryway waiting for UPS pickup.
So, I build the replacement machine, and stow the old machine in the garage in case I need parts. So much for the "return for credit" idea.
(sigh) I'm back in production, slightly poorer but wiser.
Just thought y'all would wanna know.
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Sorry about the dead machine but glad you are still in business able to print.
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:mad:
The microSD card reader won't keep the card in place. So I went to the web site and sent a help request for a new SD reader.
... time passes ...
chinese ideogram email says replacement is expensive, takes a long time to deliver, and to contact vendor.
Live chat w/Amazon starts out with "it's over 90 days old" and Out Of Warranty. After a bit of crying, Amazon agrees to "one time" deal: ship back unit for credit -- less $50 return fee. I agree and simultaneously order another one. Thus planning on sending the old machine back in the new machines box. Clever, I think to myself.
New machine shows up a few days later (actually two days early!) ... on the same day I get another chinese ideogram email asking for video of fail.
I send brief vid, and about 4hrs later, new email arrives, saying part is on way with two to three week ETA.
Ok, so I get online w/Amazon to return, just delivered and unopened, replacement machine. No problemo, I've got 30 days to return it.
More time passes, and part shows up in days, not weeks. Great!
Time to install replacement card. Machine came with bunch of metric allen wrenches, I figure tool will be in kit. Nope.
Card is under access cover with three screws that NONE of the supplied allen wrenches fit. Is oddball metric round head screw. Two have star lockwashers, and my compound linemens pliers, is able to grab the screws and I get TWO out. 3rd is missing lockwasher and try as I might, no go.
Plan B: Drill it out. This worked -- eventually -- but was harder than expected. Oh, and where DID those metal chip get to?
Finally! All three screws out! But ... panel isn't flat, it forms interior sidewall partition with 4th, hidden and inaccessable, top side screw. (sigh)
Sooo ... I BEND panel to FINALLY expose failed PCB. It's held in with four screws that DO fit one of the suppled allen wrenches and mometarily, card is out but still cabled.
There are about a dozen connectors, and two groups of terminals, with a total of eight wires in four pairs. Making sure to take pics before starting, I discover that the connectors each have been GLUED together with a dab of RTV silicon adhesive caulk. Oh joy!
View attachment 148
You can see drops of sealant on edges of white connectors ...

After some Exacto knife work, pulling and tugging, I manage to transfer, one-by-one, the wiring from the old card to new, get it installed, re-bend the cover back in place (sorta, close enuf) and flip it back over.
After reconnecting the power cord, the moment of truth arrives, and I flip the switch. A moment passes and ... the buzzer starts beeping Morse code or garbage, the display shows the splash screen with some defects and thats it. Garbled beeps and a crappy display. No joy in Muddville, Casey, mighty Casey, has struck out. :(
Ok, fortunately I have a brand new machine, in the box, sitting on the front entryway waiting for UPS pickup.
So, I build the replacement machine, and stow the old machine in the garage in case I need parts. So much for the "return for credit" idea.
(sigh) I'm back in production, slightly poorer but wiser.
Just thought y'all would wanna know.
I have read where the hot glue is there to keep the connections intact during shipping on the slo boat. :)
Yepp they just love to plaster that hot glue everywhere...i seldom come across it on any pcb/product that isn't made in China.

Silicone sealant (although dearer ££$$) is more practical as it can flex; hot glue is brittle and therein is it's Achillies heel, the component (e.g. a large capacitor) will snap/give-way/other first before the solidified hot glue does...horrible stuff...ymmv.
The hard stuff popped off cleanly, the RTV type stuff never let's go and has to be cut down instead of breaking off.
True but a PCB or circuit (with connectors) that is designed properly and constructed with good quality (especially tolerances in connectors) parts/components won't need either the hard stuff nor the soft stuff (downside is the cost increases)...it's a bodge to get around quite a few things; shipping as mentioned, to keep the assembly-line failure rate down and other stuff...back in the day melted wax was poured over certain circuits/components/parts and could be easily melted with a soldering iron or hot-air source. Sometimes varnish/shellac was also used to stop parts "resonating", especially Line Output Transformers in old school (CRT) tv's. The worst i ever encountered were when i first started out; Commodore 64 power supply units were encapsulated in epoxy resin; one had to chip away with a small hammer and a flat screwdriver to "carefully" chip just enough epoxy resin away as to get at the circuit board but without also damaging it in the same breath. Stuff (e.g walkie-talkie) to be used on oil-rigs is the worst of all...totally sealed to keep it spark-free should it be dropped/other.
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The worst i ever encountered were when i first started out; Commodore 64 power supply...
Dang, your old. Me too! :)
My wife bought our first computer at Montgomery Ward for $250 or something like that. It was a keyboard with a tape deck on the right end. She was studying to be a programmer, and eventually spent her career progamming COBOL.

As for me, I read the manual and spent all day one day learning to program that thing. This was late 70's I think. When she got home I was so proud and showed her my work. She wasn't as thrilled as I was. I ran the program and text was displayed on the screen that said... "And on the seventh day, God created the Cowboys"! :)
That's my story and I'm stickin' to it!
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Dang, your old...
Old, old, i'm still a spring chicken i'll have you know lol...i just turned 56 at the end of February...still plenty of miles left in this "old" model :p

P.S. i was 17 when i started out (previous post 👆👆) in electronics, started Uni the following year, but still worked part-time at the same place, went on to become an Amiga & Atari ST guru (amongst others).
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Started out with an ASR-33 teletype on time share at 110 baud. "storage" was punched paper tape. Built SEL 32-55 32-bit superminis. Built hand-made, wire wrapped, 6800 on S-100 buss system BITD. Owned, or used, or coded: APL, Commodore VIC-20, Atari ST (wrote the "Mushroom Interceptor"), TRS-80 Model III, PC 5150/XT/AT/486 et seq., IBM System 34, 6502, 6802, 68k, 8088, Z-80, 80x86, hp-85, hp hpib (ieee-488) controllers, DOS, .bat files, novell, dBase-III, Lotus 1-2-3, ed, vi, edlin, WordVision, ImageZ, PICK, AutoLisp, debug, Qbasic, cc:mail, NT, Lotus Notes, PHP, LAMP, PLC/ladder logic, VB, SQL, C++, Arduino, Dell server, Windoze server, html, etc.
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