HP9845B (S model with High performance LPU)) and HP98780A Graphics Monitor Schematics. These circuits were traced out when I repaired my HP9845 Power supply and rewound two failed Monitor EHT transformer for 3kV (adding 5x multipliers). They are not complete and I can't guarantee that the diagrams are 100% accurate but hope they may be of use to somebody. (In particular there seemed to be a discrepancy between the power feeds routings in the pillars/monitor backplane and the marked values on card 98780-66514 - but I'd already re-assembled it by then). I hope to upload details of two alternative EHT transformers I wound - one from scratch, with a different core, and one using the original primary winding and core. (I have two computers). Both secondaries were wound for 3kV on a home lathe and home-made multipliers added. Have fun. Martin A. Cragg