Dr Dre Beatbox problems
This is a 3-terminal To-92 device in the Power Supply circuit of a Dr. Dre Beatbox. At first I thought it was partiall s;c because I measured about 10 ohms each way between what I took to be the base & emitter terminals. When desoldering said item, I noted that it is marked 'T8' on the PCB, whereas other transistors are designated 'Q1' or whatever. Could it be a Thyristor maybe? Betweeen what i took to be the base & collector terminals I read ca. 500 ohms using the Diode test function on my DMM, with the positive probe on the 'base', but O/C the other way round. Oddly enough the low resistance I mentioned above is still present with T8 removed, and, from what little of the cicuit I traced, I cannot see from where this comes. Incidentally the Beatbox won't power up, and I've established that none of the DC voltages are present, so there is nothing for the 'power on' button to detect/switch.
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