pamminger
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Aug 30, 2007, 6:22 PM
Post #3 of 5
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Re: [mikemaiertv] philips repair
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The H.O.T has 3 pins. I assume that from left to right, the first pin is (B)the base. The middle pin is (C)the collector, and the last pin on the right is (E) the emitter. I first tested the H.O.T. using the analog MM in a 10 ohm setting. There can only be 6 combinations with the test readings as follows where continuity = 0 or some measurable ohms of resistance; no continuity = infinite resistance:
Red lead of mm to B, Black lead of mm to C; the reading is no continuity
Black lead of mm to B, Red lead of mm to C; the reading is + continuity
Red lead of mm to B, Black lead of mm to E; the reading is +continuity
Black lead of mm to B, Red lead of mm to E; the reading is +continuity
Red lead of mm to C, Black lead of mm to E; the reading is + continuity
Black lead of mm to C, Red lead of mm to E; the reading is no continuity
Next the six various combinations were then tested with a digital MM set into the diode testing mode where non-touching leads display a reading of 1 and when the leads are touching the device reads 0:
Red lead of dmm to B, Black lead of dmm to C; the reading is .426
Black lead of dmm to B, Red lead of dmm to C; the reading is 1
Red lead of dmm to B, Black lead of dmm to E; the reading is 0
Black lead of dmm to B, Red lead of dmm to E; the reading is 0
Red lead of dmm to C, Black lead of dmm to E; the reading is 1
Black lead of dmm to C, Red lead of dmm to E; the reading is .426
I am not sure exactly what these results represent! Based on the above test results, is the H.O.T. is good or bad? Would appreciate any feed back.
Thanks, peter
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