Amp Adjustments; Confirmation Of Idling Current - Yamaha MCR-E810 Service Manual

RX-E810/RX-E410/NX-E800
I AMP ADJUSTMENTS
G

Confirmation of Idling Current

1) No signal applied.
2) Non-loaded condition.
3) Aging is not necessary.
Item Test Point
R94
MAIN L
(Between terminal)
R95
MAIN R
(Between terminal)
* Confirm that the idling current is 0.25mV – 15mV after 60 minutes.
Q17
Q18
16
Rating (DC)
If the measured voltage exceeds 2.6mV, cut the lead wire of R80 (L ch)
or R81 (R ch) and then check again if each measured value satisfies the
rating.
0.05mV–2.5mV
MAIN (1) P.C.B.
R94
R80
R95
R81
Note
0.05mV ~ 2.5mV (DC)
R94 (L ch)
R95 (R ch)
Note)
• If the idling current exceeds 2.6mV after a power
amplifier repair, check for a defective component
before cutting the resistor.
• If R80 (L ch) or R81 (R ch) have already been cut off
and idling current does not flow, reconnect R80 (1k-
ohms) or R81 (1k-ohms).
• Q17 and Q18 are transistors for temperature correc-
tion. Apply silicone grease to the contact surface with
the heat sink.
R80 (L ch)
R81 (R ch)
Cut OFF