Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
---|---|---|---|---|---|
Sony | TAAX285 | DISTORTED (TOP) SINE-WAVE SIGNAL - Q607 FAULTY 8-729-178-55 | After I replaced all output transistors unit still hasdistortion. The bias signal is wrong, the top of the sine-wave signal iscut off when feed in 10KH(signal from generator). I found Q607 shorted. | ||
Sony | TAAX285 | INTERMITTENT AUDIO/FUNCTION SWITCHING | Unit would intermittently switch function input by itself.Also audio would intermittently drop either or both channels. | ||
Sony | TAAX285 | UNIT IN PROTECTION | Unit is in protection. Emitters of output transistors are 0volts. Q-700 is turned on hard causing 9 volts on collector going toprotection IC-700. | ||
Sony | TAAX285 | DEAD AMP | Fuse 1 blown no power. Replaced fuse had power but no audio.Found emitters of Q-511, Q-512 had 55 volts on them - and were shortedfrom emitter to base. |