Q503
(Q504)
PHONES
Lch IN
1
MUTE
8
W301
2
3
4
5
6
7
9
12
13
14
15
16
17
18
A.GND
POWER
+B(13V)
LED CNT
CT
19
11
10
D.GND
R ch
-B(13V)
+B(16V)
+B(8V)
KEY SE
JOG A
JOG B
HPDET
-B(24V)
FL1
FL2
20
SYNC
Q505
PT701
-B1
-B2
+B1
D308,309
FL1
FL2
D304~307
FL1
FL2
D106
D105
Rch IN
To TUNER
BLOCK
DIAGRAM
Q501
(Q502)
POWER
TRANSFORMER
F1
Z101
RL101
Q307
POWER
TRANSFORMER
PT102
KEY SWITCH
(S501,503~507)
D313
D101~104
D601~604
Q301
D303,310,322
+B2
MUTING
MUTING
CONT.
MUTING
RELAY
DRIVE
AC IN
F2
L101
REGULATOR
PROTECTOR/
OVER LOAD
DET.
-B2
+B2
BUFFER
AMP
-B2
+B2
BUFFER
AMP
M5218AFPE3
IC301
M5218AFPE3
IC501
+B2
-B2
HEADPHONES
AMP
SPEAKERS
(LF)
(6
)
RSN314H41
IC101
POWER AMP
SPEAKERS
(HF)
(6
)
REGULATOR
REGULATOR
Q312
Q313
Q105~107,
113~115,117
D108,109
VR501
(INPUT
SELECTOR)
MUTING
POWER
ON/OFF
BIAS
6
7
(5)
10
(11)
N F
12
3
8
-VM
-B1
-Vcc
SHORT
DET.
4
(1)
13
(14)
N F
2
+Vcc
9
+B1
REGULATOR
D318~320
Q308
D315~317
Q118,120,
126,127
Q506
MUTING
CONT.
+B2
D502
D501
+B2
D503
D504
Q317~319
VR502
(VOLUME)
LED
DRIVE
LED
DRIVE
D510
(VGCA)
D505
(
/ I )
Q311
HP
DET
Q320
SWITCH-
ING
D331
M5218AFPE3
IC302
NOTES
: AUDIO SIGNAL LINE
(
) indicates pin No. Right channel.
Summary of Contents for SE-HD550
Page 14: ...C328 ECBT1H104ZF5 50V 0 1U 1 F1E1H104A001 14 ...
Page 17: ...Q114 15 2SC3311ATA TRANSISTOR 2 2SC3311A0A 17 ...
Page 21: ...15 Packaging 21 ...
Page 22: ...F010400000YM KH 22 ...
