Amp Check - Yamaha DSP-AX2 Service Manual

AMP CHECK

Confirmation of Idling Current
1) No signal applied.
2) Non-loaded condition.
3) Aging is 10 minutes
Item
Q58 Base – Emitter (MAIN [1] P.C.B.)
MAIN L
Q65 Base – Emitter (MAIN [1] P.C.B.)
MAIN R
Q72 Base – Emitter (MAIN [1] P.C.B.)
CENTER
REAR CT Q79 Base – Emitter (MAIN [1] P.C.B.)
REAR L Q86 Base – Emitter (MAIN [1] P.C.B.)
Q93 Base – Emitter (MAIN [1] P.C.B.)
REAR R
Both ends of R376 (F AMP [1] P.C.B.)
FRONT L
Both ends of R385 (F AMP [1] P.C.B.)
FRONT R
Test Point
Q93 Q89 Q82
100 – 300 mV 100 – 300 mV
(RR) (RL)
MAIN [1] P.C.B.
Q362 Q359 Q357
100 – 350 mV
R385
(FR)
F AMP [1] P.C.B.
Test Point
Q86 Q79 Q75 Q72 Q68
100 – 300 mV 100 – 300 mV
(RC) (C)
Q354 IC355
100 – 350 mV
R376
(FL)
Rating (DC)
100mV – 300mV
100mV – 350mV
Q54
Q65 Q61 Q58
100 – 300 mV 100 – 300 mV
(R) (L)
IC356 IC352 IC354 IC353
DSP-AX2
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