Zenith Data Systems (USA) began operations in 1979 after Zenith acquired Heathkit and ZDS was an early partner with Microsoft, licensing all Microsoft languages for the Heath/Zenith 8-bit computers.
Never heard of Zenith?
Unlike many of the other laptop computer manufacturers, ZDS targeted the large government contracts not the retail market and they were very successful at this. Unfortunately they later experienced difficulties keeping up with demand and their after-sales service obligations and eventually were sold to a French company and became known as Packard Bell.
Zenith Data Systems AC Power Supply
Made In Japan
Released to market 1989
Model: 150-308
120VAC @ 60HZ INPUT NOT AUSTRALIAN 240V
Switchmode supply not linear
Designed for use with the SuperSPORT (ZWL-184-02) laptop - 386SX cpu running at 16Mhz!
16.5V DC @ 2A
DC plug: centre pin is NEGATIVE not the more standard positive for IT equipment.
Tested (powered via a stepdown transformer) - DC output is fine @ 16.65V with no load (within tolerances)
I will NOT supply the AC power input lead, so that this power supply is not accidently powered up with our 240V domestic supply.
Suitable EARTHED USA style IEC power leads are easily obtainable but you still MUST use a step-down transformer with this lead.
WARNING:
IEC male socket is used for the AC input lead - it would be very easy to accidently plug this into our 240V supply so I have wrapped a Warning Notice around this socket so that the user is reminded to only power this via a stepdown transformer if being used in Australia.
WARNING !!!
120V AC INPUT ONLY
DO NOT POWER UP FROM
AUSTRALIAN POWER SOURCES
