Denon PMA-425R - Schematic Diagram; Schematic of Volume Unit; Schematic of µ-COM Unit; Schematic of Main Unit

SCHEMATIC DIAGRAM
LEA
ALAN
(Bass)
(TREBLE)
+
(Vv.
LOUDNESS)
cooy7
Tcoo1a (172!
NuM206800C ROg4 Ross
390 6.8k
é REE COGS
15.4 R077 cost | AOA 5079. RoBs i S60p
1.2K AS po7g 0.0022 200 Ba093
Boos nose , 1c0078 (172) tik rl VROO4A 39%
a BA15218 6°Ss6 soon ON
cos3 : %
Ros3
C043
0.48
Boost
.
|
1090 10/16 Aos3
= VROO3A a OFF
10k Boost |! :
!
CcuT 1
veces cos3 ovosa
30K : ' Z
reo018 (a2) $982 8332 0.33/50 1
1
1
i)
22
RO12 RO14
130K Atk
coi2
bra 2
cose
0.0022
10/16
1.5k po74 220
10k
Roge
390 6.8K
cos4
0.33/50
cut
| vroosB | Boost
10K
gaosTt |
co62
0.086 vVAR0048
0.04 (2)
vROO18
100K
co27
ROG4
cO44.
ROTO.
Y
100
10/16
100
coso
ROSO
:
10/16
2.
4k
wo
1
cD
,
t
Ay
15.4V
t
A301
TR301
Z0303
Ag15
~
3.6K
2802004
(P)
36.9V
MTZJ27A
41V_
4.7
(NB)
A309
i5.9v
2SR35-200a
(4)
{TB393,
.
.)
1
iv;
R345
or
10k
i
TR321
ov
TUNER
28¢17408
(s)
A
R307
aati
A3t2
Loe
onsorr
a!
400k
10k
‘aaK
ary
1
KO028;
+
;
oa
na0s
'
1
R030
tg
oTC14
t
'
\
co30
—
!
i
86p
pkoozal
cost
:
iC)
!
ROS
7?
WL
a
220
:
|
TA
AUX
|
ell
T
Boss
ey
>
R
(Oy
f
R046
R314
F5.5V
A304
TR306
t
2.7
3
fa.
2K
6.2K
2SC1841E/F
i
\
220
GO)
=37V
20
(aw)
--\--
R032
4)
as
4
7
C304
R302
TA302
[
|
yo
C032
s6p
10/S0
3.6K
2561328
(P)
;
'
co33
i
"5
S6D
fo
:
‘Be
|
ae
R047
TaPe-1
P.a
Pera
r
2
ace
ess
KoO38!
i
42-7™
r--
~~
TeESH
1
1
1
i
coa4
\
1
1
:
S60
\
1
WKOO3A;
f
i)
&
‘
1
'
TAPE-2
P.B
\
j
Ri44
0107
}
4.7
(NB)
!
\
?
C104,
19A35-200A
0106
‘
!
0
OL
tz
1SA35-200A
\
1
c103
;
-
;
i
100/6.3
;
Hl
re
ai
sea
Sina
i?
Cia,
ie
seas
Sm
i
Se:
a
A143
F
220K.
f
‘
a
GND
e
5.2V
TAvOG
GND
GND
:
104
R137
TAPE-1
REC
2SC
17408
(E)
7Zd5
3A
ik
a
uxooae!
2.2V
'
i)
\
co78
0.01
(Z)
R139
,
0105
!
Oe
1S8252
'
\
UKOO4A,
ot
o
4U-2879-1
Led
|
=
VOLUME
UNIT
TAPE-2
REG
aides
GN
(0a
aaa
a
(Oya
ee
1
PTHSEM04BE jCN303
471TS2F333
1U
-2860-3
$Ww105
A1t73 SLR
TAPE-2 7 330
|EMOCON
M—-COM
UNIT
SENSOR