The strange thing is when you install new fuses and remove the power output transistor and install the driver board the fuses dont blow but the moment when you install the new power output transistors and turn the power on the fuses blow taking the expensive power output transistors with them!!! Does anyone has and idea?! what might be causing the problem?! I have the service manual but it for serial numbers of mac 1900 starting with AN1001 mine has serial number starting with 6X there some small differences in the circuit components but otherwise everything else seem to be the same. I suspect something is bad on the power output drivers board I am thinking the TR 401 triac or the electornic bilateral switch. The strange thing is all the voltages in the power supply except the 110 volt(this shows 150v on digital meter) line is within specs. zip file has been downloaded to your computer, click to unpack the file. The Mac must also be using macOS High Sierra or later, the latest version of macOS Sierra, or the latest version of OS X El Capitan.Hi everyone, My MAC 1900 RECEIVER keeps on blowing 5A protection fuses and shorting the power output transistors in the process. To download an installer suitable for creating a bootable installer, use the App Store or use a web browser to download from a compatible Mac.

If you’re using an Apple Silicon M1, M2 or M3 Mac it will download and install Windows 11 ARM. Parallels will then automatically download and Install Windows 11 when you click Install Windows. Follow the onscreen installation instructions.Ī bootable installer can be useful if you want to install macOS on multiple computers without downloading the installer each time, or when you can't install using the other methods. Parallels will ask permissions to access your Mac Desktop, Downloads and Documents folders.

Open your Applications folder and double-click the macOS installer, named Install. pkg file, then follow the onscreen instructions to install the macOS installer into your Applications folder. dmg file to open it and see the package (.pkg) file within.ĭouble-click the.

Use these links to download a macOS disk image (.dmg) file.ĭouble-click the.

Transistor instal the new for mac