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Confirmation Of Idling Current Of Amp Unit - Yamaha KMA-1000 Service Manual

Digital karaoke mixing amplifier
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KMA-1000/KMA-950

CONFIRMATION OF IDLING CURRENT OF AMP UNIT

Item
Condition
No input signal
Idling current
Wait for 2–3 minutes
14
Test point
TP413–TP415 (L ch)
TP414–TP416 (R ch)
20 mV – 350mV
(DC)
TP413–TP415 (L ch)
TP414–TP416 (R ch)
Rear side
R430
R429
Front side
Raiting
If measured voltage exceeds 350 mV,
DC 20–350mV
open (cut off) R429 (L ch), R430 (R ch)
and reconfi rm the voltage.
Open (cut off)
R429 (L ch)
R430 (R ch)
TP416
TP414
TP415
TP413
Remark

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This manual is also suitable for:

Kma-950