Olympus BH-2 BHT - AC Power Switch; Voltage Selector Switch

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OlympusBH‐2(BHT/BHTU)Electronics   Revision2    Page12of24
ACPowerSwitch
TheACpowerswitch(seeFigure11)is anAlpsSDT‐7chassis‐mountDPSTrockerswitchwith aTV‐5ratingforUL/CSA.
This switch cannot be cleaned with control/contact cleaner since there are no openings  to inject the cleaner.The
mountingholesofthisswitcharespaced34mm
oncenter.
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Figure11–ACPowerSwitchMountedtoBHT/BHTUElectricalBase(100/115VVersion)
VoltageSelectorSwitch
Thevoltageselectorswitch(seeFigure12)is achassis‐mountDPDTslideswitchratedfor4A/125VACand2A/250VAC.
Theslideprotrudes 3/8” from the mounting surface and the mountingholes are spaced 1‐1/8” on center.There are
openings on both ends of this switch through which control/contact cleaner
may be sprayed while the slider  is
positionedattheoppositeend(withpowerremovedfromthe equipment).The low‐voltageposition ofthis switchis
rarely needed, and if a compatible replacement cannot be found, the switch could simply be bypassed in order to
hardwirethemicroscopetooperateat
itsnominaloperatingvoltage.Sinceonlyonepoleonthisswitchisused,aSPDT
replacementcouldbeused.
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Figure12–VoltageSelectorSwitchMountedtoBHT/BHTUElectricalBase(100/115VVersion)