26
CRX-E300
CRX-E300
■ AMP ADJUSTMENTS
● Confirmation of Idling Current
1) No signal applied.
2) Non-loaded condition.
3) Aging is not neccessary.
Note
If the measured voltage exceeds 5mV, cut the lead wire of R440 (L
ch)or R445 (R ch) and then check again if each measured value satisfies
the rating.
Item
MAIN L
MAIN R
Test Point
R471
(Between terminal)
R474
(Between terminal)
Rating (DC)
0.1mV—5mV
Note)
• If R440 (L ch) or R445 (R ch) have already been cut off and
idling current does not flow, reconnect R440 (680 ohms)
or R445 (680 ohms).
• Q412 and Q413 are transistors for temperature correction.
Apply silicone grease to the contact surface with the heat
sink.
R440 (L ch)
R445 (R ch)
Cut OFF
0.1mV ~ 5mV (DC)
R471 (L ch)
R474 (R ch)
* Confirm that the idling current is 0.25mV — 15mV after 60 minutes.
R471
R445
R440
Q412
Q413
R474
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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