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Old 2nd Feb 2020, 2:03 pm   #1
Whaam68
Hexode
 
Join Date: Feb 2007
Location: Luton, Bedfordshire, UK.
Posts: 285
Default 2P1M 7Y SCR equivalent

Hi
Iím slowly working through the mechanism power supply board of an early 1980s TEAC A300 cassette deck (see thread on page 2 of the tape sub forum) - attempting to solve the lack of power to the mechanism. All the diodes so far have been ok but Iíve just tested the SCR a 2P1M. With my meter on the 20k range and negative on the anode and positive on the cathode (per the datasheet pinout) Iím reading O/C rather than high resistance. Doctor google suggests that this is a bad thing! Can I replace this with any TO-202 SCR with a 4A 100v rating? Can anyone recommend a common substitute.

Supplemental question what is likely to have caused the failure? Assuming my conclusion above is right!
Thanks
Mike
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