Working on marine electronics involves high-frequency signals and sensitive components. The FM8900S service manual emphasizes:
If you have a scanned copy of the original FM8900S service manual and are legally allowed to share it, consider uploading it to the Internet Archive or a relevant electronics forum. Your contribution could save someone’s project—or their career. fm8900s service manual
: Some units contain internal batteries. When disposing of them, terminals must be taped to prevent short circuits. fm8900s service manual