Can anyone tell me what these PSU pin abbreviations mean? PSU 614-0446Hi all. I’ve gutted a 27” iMac that suffered the near-universal GPU failure, and I’m converting it into a monitor with a...
"Can anyone tell me what these PSU pin abbreviations mean? PSU 614-0446"에 답변Well, I got the whole thing working. I ran a switch to ground the PS_ON line as required, which activates the stock PSU. The PSU has several 12V outputs, so one of them powers the LCD driver board, another goes through a converter to provide 5V to the backlight-on signal, and another gets converted to 3.3V for a PWM module to control the backlight brightness at 150 kHz. The LCD driver board had its own power supply for the backlight, but some reviews said it asn’t as bright as the stock one so I added the PWM module to drive the stock one.
"iMac Intel 27" EMC 2429 Power Supply voltage values?"에 답변@oldturkey03 Thanks for that info. I have one of the many 27” iMacs with blown GPUs, and I’m converting it into a monitor with a cheap driver board off eBay. But I want to use the original PSU and inverter, not the cheap one (which, based on reviews, doesn’t drive the backlight with original brightness). I have a pinout that's probably right, but I'm not sure what some of these abbreviations mean: http://hqlaptoprepair.co.uk/imac-a1312-psu-pinout/ Can you give me a description of the non-obvious ones? Thanks!