HP34C Repair

[Zaphod]

(11-08-2018 05:38 PM)javico Wrote:  How can I check if the charger is defective? with a multimeter?

Yeah, select AC volts (a range to accommodate 9VAC - say 20V etc on a manual range meter) , plug it in and stick your test leads on the contacts , you won’t necessarily get exactly 9V because you’re not loading it... so it will undoubtedly read slightly more than 9VAC