lc575

I obtained this schematic from someone else but will avoid naming them for now. I am very thankful to have obtained it; 2but honestly, it's not a very good scan. All the gray parts are very hard to read. But everything other than that is quite good, and you'll find it useful when diagnosing...

Somehow I killed my Mystic merely by making some 4-wire resistance measurements in the vicinity of the XC88916DW55 chip on my LC575 motherboard. I know it's a problem on the motherboard, not the analog board. I believe the 88916DW chip is now bad because when I put my scope on it, the Q0 and...

Hi there, Taking a break from my Amiga 500 restoration I thought I'd turn my attention to my LC 575 restoration. I previously received a 575 via mail that arrived in, shall we say, less than ideal condition. I managed to salvage a few parts from it including the logic board and I've slowly...

Greetings. I was hoping someone here could help me solve a mystery. I have an LC 575 that's been running happily with a SCSI2SD as its internal drive. I recently got a ZuluSCSI mini I was hoping to use as an external drive. The ZuluSCSI worked great on my LC 630, but when I connected it to the...

I was wondering if anyone knew how exactly the Color Classic 575 logic board resistor swap trick works? This allows the 575 board work on a 512x384 stock Color Classic Monitor. Method in question: https://powercc.org/mystic/ Are we letting the 575 board know that we are connected to a...

I recently picked up a non-working Macintosh TV that is not in the best shape. I'm hoping a good cleaning will restore the black plastic to a respectable condition. However, the CRT has a scratch on it, and I'm wondering if the 14" Trinitron is shared with other LC / Performa models. I have...

I posted this question on FaceBook (Vintage Apple Macintosh Enthusiasts group) 5 days ago and not a single person replied, so let's see if the amazingly knowledgable folks here at TinkerDifferent can do better! Do any of you have experience using any of the following Keystron RAM SIMMs in your...

Just picked up an LC 575 to use for my Mystic Color Classic upgrade. I was told it would power on but no image, so I thought maybe the analog board may be bad, which didn't concern me too much since I just want the logic board from it. However, when I got it home, I was pleasantly surprised to...