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HCD-GNX88
Q Q
3 7 6 3 1 5 1 5 0
7-5. BLOCK DIAGRAM
– AMP SECTION –
F-L
F-R
MAIN
H
SECTION
(Page 29)
T E
L
1 3 9 4 2 2 9 6 5 1 3
SW OUT
LINE-MUTE
78
w w w
HCD-GNX88
IC600
POWER AMP
18
11
10
+
14
8
9
12
MUTING
TH629
Q604, 606, 610
THERMAL
DETECT
Q628, 630
STK MUTE
CT
VP
4
DC DET
2
OUT
OVER
OCP
3
1
LOAD
IC550
OVER CURRENT
PROTECTOR
IC800
POWER AMP
SW MUTE
14
Q812
14
6
7
+
11
4
5
MUTE
Q810
TH630
THERMAL
DETECT
Q629
70
SYSTEM CONTROLLER
IC401 (4/5)
x
a o
.
i
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MAIN
DBFB F/B
SECTION
G
(Page 29)
D624
+
RY646
OVER LOAD
DETECT
Q668, 618
MUTING
RELAY DRIVE
Q640, 641
Q644, 647
MUTING
CONTROL
Q634,682
D550
HP-MUTE
D812
OVER LOAD
Q
Q
DETECT
3
7
Q800, 850
RELAY DRIVE
Q814, 815
RY862
52
68
u 1 6 3
y
30
30
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8
9
2
4
9
J1103
PHONES
TM600
+
L
+
-
FRONT SPEAKER
+
R
-
PROTECT
SWITCH
TM601
Q666
+
L
-
SURR SPEAKER
+
R
PROTECT
-
SWITCH
Q385
Q648
FAN DET
FAN MOTOR
FAN-ON
M891
M
DRIVE
DC FAN
FAN-K
Q580,581,584
Q583
FAN-CTL
DISPLAY
I
SECTION
(Page 31)
VL(AC)
DISPLAY
J
SECTION
6
3
1
5
1
5
0
8
9
(Page 31)
TM101
-
SUB WOOFER
OUT
+
77
75
36
76
100
• SIGNAL PATH
: FM
m
c o
.
8
2
9
9
2
4
9
8
2
9
9
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