Olympus BH-2 BHT - Bridge Rectifier; Lamp Intensity Control

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OlympusBH‐2(BHT/BHTU)Electronics   Revision2    Page10of24
BridgeRectifier
ThebridgerectifierisanS15VB10(100V15A)chassis‐mountbridgerectifierwithpush‐onterminals(seeFigure8).Look
forasubstitu tewithacontinuouscurrentratingof15AormoreandaPIVratingofatleast 100V.Suitablesubstitutes
arethe NTE5322, KBPC1501,orKBPC1502.Besure
toinstall  thereplacementwith thermal pastefillingtheinterface
between the part and the chassis, to facilitate heat flow.The NTE5322 is available from Allied Electronics and from
Amazon.
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Figure8‐BridgeRectifierMountedtoBHT/BHTUElectricalBase(100/115VVersion)
LampIntensityControl
The lamp intensity control is a 500Ω sliding potentiometer, with linear taper, and was manufactured by Noble (see
Figure9).Ithas60mmoftravel,andthemountingholesarespaced65mmoncenter.Beforereplacingthispart,try
cleaningitwithvolumecontrol/contactcleaner(withpowerremovedfromthe
equipment).Lookforasubstitutewitha
powerratingofatleast1/2W.
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Figure9–LampIntensityControlMountedtoBHT/BHTUElectricalBase(100/115VVersion) 