Thread
TAM Power Supply repair
Got a couple of these power supplies in. Both dead. one of them had 5V standby, the other one does not.
Both have good fuses.
This post is about ONE, as I only got the parts for one so far.
Basically, if your fuse is good, but your missing your 5V standby, IC1 is likely shorted, and R4 blows open when IC1 shorts. R4 is the fusible resistor to IC1, and IC1 is a self-contained chopper mosfet, and SMPS controller designed specifically for standby power supply output.
These ICs are discontinued, so you gotta scour ebay for NOS supplies.
After changing out those components, the power supply fired right up. no problems.
Both have good fuses.
This post is about ONE, as I only got the parts for one so far.
Basically, if your fuse is good, but your missing your 5V standby, IC1 is likely shorted, and R4 blows open when IC1 shorts. R4 is the fusible resistor to IC1, and IC1 is a self-contained chopper mosfet, and SMPS controller designed specifically for standby power supply output.
These ICs are discontinued, so you gotta scour ebay for NOS supplies.
After changing out those components, the power supply fired right up. no problems.
Great Job. Thank you for posting.
I am finding like all caps power supplies are right up there in failure now myself.
I am positive you have seen way more than I have but just restating the obvious.
I am finding like all caps power supplies are right up there in failure now myself.
I am positive you have seen way more than I have but just restating the obvious.
yea, these TAM supplies arnt quite old enough to exhibit capacitor failures.
these are general component failures. Whether surge, or whatnot.
these are general component failures. Whether surge, or whatnot.
awesome. well wether it was a surge or bad design, you figured it out asap!! good job!