i thought so ok thanks. i ask because i keep blowing the tl072c, and shorting out the 2 q4 & q5 mspa56-06. i cant seem to find out why. I thought i may have them backwards.
Last edited:
Do you mean rectifiers? Why do you consider your problem, he saw very little of them fail the truth.
Check D118 and D119 zener diodes, these provide the +/- 15V to the base of Q4 and Q6 for voltage regulation to the various op-amps. D118 (feeds base of Q4 mpsa56) dies more often then D119 (feeds base of Q6 mpsa06). The part number for D118/119 is MMSZ5245B. Make sure to look at marking to install correctly. D118 is - voltage, D119 is +.
- Home
- General Interest
- Car Audio
- MTX Thunder Power supply drive issues.