HCD-GNX780/GNX880
30
30
HCD-GNX780/GNX880
7-4. BLOCK DIAGRAM – AMP SECTION –
H
MAIN
SECTION
(Page 29)
MAIN
SECTION
(Page 29)
G
DISPLAY/POWER
SECTION
(Page 31)
J
DISPLAY/POWER
SECTION
(Page 31)
I
MUTING
Q604, 606, 610
F-R
DBFB F/B
F-L
SW OUT
LINE-MUTE
78
70
STK-MUTE
PROT
STK-MUTE
14
13
11
4
3
12
STK MUTE
FAN DET
FAN-CTL
FAN-ON
FAN-K
HI SPEED
OVER LOAD
DETECT
Q668, 618
+
+
+
+
MUTING
Q640, 641
MUTING
CONTROL
Q634,682
F-RELAY
HP-DET
HP-MUTE
FAN-K
100
HD DETT
75
HP-MUTE
77
LINE/SURR-RLY
60
FAN HI SPEED
76
FR-RELAY
36
FAN KICK-OFF
OVER LOAD
DETECT
Q800, 850
RELAY DRIVE
Q644, 647
H/P DET
F-RELAY
HP-MUTE
+
-
-
+
FRONT SPEAKER
SUB WOOFER
OUT
L
R
PHONES
J1103
RY646
RY665
SYSTEM CONTROLLER
IC401 (4/5)
TM600
+
-
-
+
SURR SPEAKER
L
R
TM601
M
FAN MOTOR
DRIVE
Q580,582,585
DC FAN
M891
GNX880
VL(AC)
TH629
THERMAL
DETECT
Q628, 630
SW MUTE
Q812
MUTE
Q810
Q583, 584
+
68
SW RY/IO-EXP CLK
RY862
TM101
RELAY DRIVE
Q814, 815
6
4
OVER
LOAD
DC DET
VP
OCP
CT
OUT
D624
D812
GNX880
D550
2
1
PROTECT
SWITCH
Q666
Q648
18
11
10
9
14
8
-
HI SPEED
SWITCH
Q581
7
5
• SIGNAL PATH
IC600
POWER AMP
IC550
OVER CURRENT
PROTECTOR
IC800
POWER AMP
: FM
