Does anybody about these transistors Q1 and Q7? They are marked W1P (83) and 2F (E). The dot under the F of the latter might be a clue about the manufacturer but so far it's unclear. W1P appears in three places, Q7 is behind the display, Q9 is on the backside of the HV circuitry (also behind the display, near the speaker connector), and Q10 is near the center of the board. 2F (E) has its only appearance as shown in the photo.
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