APC SU1400 All lights flashing issue

Tool suggestions, soldering tips, general useful electronics knowhow.
Post Reply
User avatar
exxos
Site Admin
Site Admin
Posts: 8564
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

APC SU1400 All lights flashing issue

Post by exxos » Mon Jun 17, 2019 1:25 pm

So my APC 1400 would go for a few weeks, then just die with every light on the front flashing. APC's support pages just says "hardware failure" which is of no help. After searching the web for hours, it seems a couple people claim to have suggested its the relays inside going faulty. I came across a video of a guy with a similar PSU and a similar sounding fault (here).

I documented my progress as I went along, as no doubt I will forget what wire goes where all something :lol: anyone else reading this in the future, this isn't a "how-to guide", its just simply documenting it as I am going along as it may help others in the future..of course at the time of typing, I do not know if this will fix the issue until I try it and that is run for a few weeks... It may well just explode after I fiddled with it, who knows...


The very dusty and poorly power supply..
IMG_4341.JPG
IMG_4341.JPG (357.45 KiB) Viewed 1877 times

Removing the bottom screws to release the black case..
IMG_4342.JPG
IMG_4342.JPG (363.99 KiB) Viewed 1877 times

removing the top plastic cover, which just pulled off..
IMG_4343.JPG
IMG_4343.JPG (518.18 KiB) Viewed 1877 times

Annoying metal lug things, I managed to fiddle the board out of these.. There is also a screw on the back of the case which needs to be removed as it holds the circuit board in place..
IMG_4344.JPG
IMG_4344.JPG (304.42 KiB) Viewed 1877 times

..and it would be too easy if the board just lifted out at this point...
IMG_4346.JPG
IMG_4346.JPG (220.4 KiB) Viewed 1877 times


Time to investigate..
IMG_4347.JPG
IMG_4347.JPG (277.83 KiB) Viewed 1877 times

The main one is the huge connector at the end of the transformer cables needs to come out..
IMG_4348.JPG
IMG_4348.JPG (286.09 KiB) Viewed 1877 times

The ribbon cable needs unplugging from the right side of the board, and the battery backup cables need the screw removing to release them...
IMG_4349.JPG
IMG_4349.JPG (268.88 KiB) Viewed 1877 times
IMG_4350.JPG
IMG_4350.JPG (287.34 KiB) Viewed 1877 times


Large connector comes out by pushing their tabs inwards and simply lifts out..
IMG_4351.JPG
IMG_4351.JPG (283.56 KiB) Viewed 1877 times

The black cable need some plodding next as this is in the way...
IMG_4352.JPG
IMG_4352.JPG (262.8 KiB) Viewed 1877 times

There is also a cable tie hidden away at the back that needs decapitating.
IMG_4353.JPG
IMG_4353.JPG (241.94 KiB) Viewed 1877 times

This annoying plastic box had to be moved out of the way as there was some plastic bits on the heatsink fins preventing the board from pulling out, so I just unscrew the box, and pushed the clips gently inside, so it will come out, and the ribbon cable comes out with it..
IMG_4354.JPG
IMG_4354.JPG (223.28 KiB) Viewed 1877 times
IMG_4356.JPG
IMG_4356.JPG (228.73 KiB) Viewed 1877 times

White connector comes out next...
IMG_4357.JPG
IMG_4357.JPG (274.53 KiB) Viewed 1877 times

a better view of the cable tie (not yet chopped) and black cable removed...
IMG_4358.JPG
IMG_4358.JPG (258.61 KiB) Viewed 1877 times

lot more freedom now, getting there..
IMG_4359.JPG
IMG_4359.JPG (343.79 KiB) Viewed 1877 times

The blue and brown cables come out next....then unscrew the white and black cables on the heatsink..
IMG_4360.JPG
IMG_4360.JPG (278.23 KiB) Viewed 1877 times

freedom!
IMG_4361.JPG
IMG_4361.JPG (543 KiB) Viewed 1877 times

These are the relays I'm going to un-solder next and see if I can find some compatible replacements..
IMG_4362.JPG
IMG_4362.JPG (275.09 KiB) Viewed 1877 times

more to come later...
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

User avatar
exxos
Site Admin
Site Admin
Posts: 8564
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: APC SU1400 All lights flashing issue

Post by exxos » Mon Jun 17, 2019 2:08 pm

These were a bugger to get out :roll:

4 of the relays are the same, so makes life a little easier.. now to see if they still exist...

IMG_4364.JPG
IMG_4364.JPG (141.08 KiB) Viewed 1867 times
r1.jpg
r1.jpg (74.4 KiB) Viewed 1867 times
r2.jpg
r2.jpg (124.31 KiB) Viewed 1867 times

Original datasheets...
RP920145.pdf
(260.45 KiB) Downloaded 32 times
az755.pdf
(225.19 KiB) Downloaded 34 times


The ones I think I am going to order are...

https://uk.farnell.com/omron/g2rg2a424d ... dp/2213726

https://uk.farnell.com/schrack-te-conne ... dp/1175017


There are so many variations and series of relays its unreal :stars: :stars: But these are same contact ratings, same (ish) coil resistances (I didn't want to use a lower coil resistance as I don't know if the driver transistors could cope (to lazy to check) and didn't want to risk it). Farnell relays may switch a bit quicker.. but overall, they seem like they will do the job and I am sick of looking at relays now anyway :roll:
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

User avatar
exxos
Site Admin
Site Admin
Posts: 8564
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: APC SU1400 All lights flashing issue

Post by exxos » Mon Jun 17, 2019 3:48 pm

Hmm that can't be right...

IMG_4367.JPG
IMG_4367.JPG (362.46 KiB) Viewed 1856 times
IMG_4369.JPG
IMG_4369.JPG (400.66 KiB) Viewed 1856 times

2 of the relays measured odd..

DISSECTION TIME!!!

IMG_4370.JPG
IMG_4370.JPG (183.13 KiB) Viewed 1856 times

That looks pretty toasted to me.
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

User avatar
exxos
Site Admin
Site Admin
Posts: 8564
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: APC SU1400 All lights flashing issue

Post by exxos » Thu Jun 20, 2019 12:57 pm

New relays soldered in... next to try and work out how to put this thing back together again...

IMG_4388.JPG
IMG_4388.JPG (303.37 KiB) Viewed 1811 times
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

User avatar
exxos
Site Admin
Site Admin
Posts: 8564
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: APC SU1400 All lights flashing issue

Post by exxos » Thu Jun 20, 2019 1:45 pm

OK so back together.. this didn't end well :(

I started with it plugged direct into the mains, and it seemed to turn on do self test fine. So I put it on my variac and turned down the voltage slowly until the under voltage light turned on.. which it did at 199VAC

IMG_4401.JPG
IMG_4401.JPG (208.11 KiB) Viewed 1802 times

So I slowly started turning the voltage up and at around 200V the thing went dead and just the top red light was on... so I turned it off and on again then got the original fault...

IMG_4399.JPG
IMG_4399.JPG (203.64 KiB) Viewed 1802 times
Then there was a loud POP and the magic smoke escaped :roll:

So I will take it to bits and see what blew... but overall it looks like new PSU time :cry:
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

User avatar
exxos
Site Admin
Site Admin
Posts: 8564
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: APC SU1400 All lights flashing issue

Post by exxos » Thu Jun 20, 2019 1:58 pm

Looks like the MOV's have blown up. I don't understand why since I was only inputting 220VAC.

Though oddly the overvoltage light didn't come on in all this, just went into "all lights flashing again". I know it was working previously as it was normally on most of the day. So I suspect the "all lights flashing" is when the input voltage goes to high , or out of spec of the PSU and it can't "deal with it" and goes nuts.

IMG_4404.JPG
IMG_4404.JPG (258.36 KiB) Viewed 1799 times

So in conclusion.. While changing the relays may fix some peoples issues, it didn't in this case. I would suggest anyone reading this and having "all lights flashing" not to bother messing with it and buy a new PSU... Which is what I am now going to do :)
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

Post Reply

Return to “ELECTRONICS”