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DSP-A5
I AMP ADJUSTMENT
Confirmation of Idling Current of Main Amplifier
•
Right after power is turned on, confirm that the voltage across the
terminals of R688(Main Lch),R690(Main Rch), R692(Center),
R694(Rear Lch), R696(Rear Rch) are between 0.1mV and 10.0mV.
•
If it exceeds 10.0mV, open (cut off) R571 (Main Lch), R577 (Main
Rch), R583 (Center), R589 (Rear Lch), R595 (Rear Rch) and
reconfirm the voltage.
•
Confirm that the voltage is 0.20mV ~ 15.0mV after 60 minutes.
R692
MAIN (1)
R694
R577
R690
R571
R688
Front Panel
19
R583
R595
R696
R589
POWER (3)
R688(Lch)
R690(Rch)
Q523
R692(Cch)
Q525
R694(RLch)
R696(RRch)
Q524
R571(Lch)
R577(Rch)
R583(Cch)
R589(RLch)
Q522
R595(RRch)
Q521
0.1mV ~ 10.0mV
(DC)
0.1mV ~ 10.0mV
(DC)
Cut off
Note)
•
If R571, R577, R583, R589 and
R595 have already been cut off
and idling current does not flow,
reconnect R571, R577, R583,
R589 and R595.
•
Q521 ~ Q525 are transistors for
temperature correction.
Apply silicone grease to contact
surface with the heat sink.
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