2021-07-03: Since I'm dealing with some issues powering a project with a Meanwell IRM-01-5 5V Power supply, I thought it would be easier to diagnose if I tore the unit apart a little first. But first a quick description of the problem: This little power supply works very well when powering a circuit from a normal 120V or 240V wall socket. But take this same power supply and attempt to feed it power from a battery powered inverter or inverter generator and it doesn't seem to work properly - there's a base 5V output, but there are also large numbers of apparently random voltage spikes/dips also coming from the power supply. Still doing testing, but thought others might like looking over the guts of this unit.

 

IRM

Top Cover

 

IRM

Outside Shot

Snap the bottom off (no glue at all?) and you can literally pull the circuit board out. After removing some gray silicone type potting compound (peeled it away - there really wasn't that much) we are left with a circuit board like this:

IRM

FS1 = T1A300VCQMST Subminature Fuse?

C6 = Lelon 4.7uF 450V 105°C Capacitor

L1 = Brown/Black/Red/Silver - 1 mH +/-10%

R2 = Yellow/Black/Black/Gold - 40 Ohm +/-5%

IRM

BD1 = LT0B01 ABS10M Bridge Rectifier

C5

D1 = A7

R3 = 1004

IRM

Side View

IRM

Output Side View (lost the little choke sitting over the negative pin somewhere along the way)

IRM

C10 = 560uF 6.3v ORE105°C H014(M) (Brand marking is facing the transformer assume Lelon until I desolder it and update)

IRM

C31 = AH102M Ceramic Disc Capacitor, X1:400VAC, Y1:400VAC

IRM

Bottom of board

D2 = A7

IRM

U1 = LNK364 LinkSwitch-XT Energy Efficient, low Power Off-Line Switcher IC - the brain!

Q2? = LJ06 1008*W Assumed to be Vishay TCLT1008 Optocoupler, Phototransistor Output in SOP-4L

R5 = 68B Resistor - 4.99kOhm 1% (EIA-96)

IRM

D89 = Z6V2 Zener Diode = 5.89-6.51V

IRM

D100 = P5L45F 29N0

R125 = 103 10kOhm

IRM

Mean well TF-5367 CPE R0 2011 E339516 SBI4.2

IRM

Two 33C Resistors - 21.5kOhm 1% (EIA-96)

(And if you've made it this far - good for you! - all these pictures are high resolution pictures; I just haven't taken the time to figure out how to make them zoomable - You can right click and chose 'open in new window' if you want to see them larger. Any part identifications? Corrections? Links to datasheets? Use the 'Contact Us' Link at the bottom of the page)

2021-07-09 Since I'm not getting around to adding the other pictures and a deeper explanation of the problem I was running into, I thought maybe I should at least put in a plug for the guys at TRC Electronics. These guys (Kevin Sanders and Craig?) helped point me in the right direction - Noise reduction with chokes on the input power lines. What is especially noteworthy is the fact that I haven't bought anything from them yet. They were willing to help solve a problem and spent multiple hours working through the problem with me before I spent a dollar with them. If you need any of the Meanwell IRM series, they have them... And they currently beat Mouser&Digikey's Pricing... Ok, enough advertising for now.

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