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HCD-GTX88
HCD-GTX88
6-5. BLOCK DIAGRAM — AMP/SUBWOOFER SECTION —
(Page 33)
(Page 33)
(Page 36)
(Page 36)
(Page 33)
MUTING
Q604, 606, 610
F-R
DBFB F/B
F-L
67
STK MUTE
12
OVER LOAD
DETECT
Q668, 618
+
+
+
MUTE
Q640, 641
MUTE
CONTROL
Q634,682,684
71
LINK RELAY
88
FAN HI SPEED
97
SW VOL LED
100
HP DET
95
SW VOL IN
RELAY DRIVE
Q644, 647
+VL
–VL
IN1
ST BY
+RE1
–RE1
+RE2
–RE2
+VCC
–VCC
SW OUT
+
-
-
+
FRONT SPEAKER
SUB WOOFER
OUT
L
R
PHONES
J1101
RY646
RY862
+
-
-
+
L
R
FAN MOTOR
DRIVE
Q579, 585
DC FAN
M891
M
M
FAN MOTOR
DRIVE
Q586–588
FAN CONTROL
SWITCH
Q584
FAN DETECT
Q580–582
DC FAN
M892
TH629
THERMAL
DETECT
Q628, 630
94
THERMAL VACS
TB001
TM600
D624
D550
18
11
10
9
14
8
• SIGNAL PATH
POWER AMP
IC601
69
PROTECTOR
70
FRONT RELAY
68
HP MUTE
H
MAIN
SECTION
F
MAIN
SECTION
MAIN
SECTION
I
DISPLAY
/POWER
SECTION
K
DISPLAY/
POWER
SECTION
J
TH630
11
4
5
6
7
3
2
13
OCP
CT
OUT
VL(AC)
1
VP
2
4
3
STK MUTE
Q812
SUBWOOFER POWER AMP
IC800
SYSTEM CONTROL
IC401 (5/6)
OVER CURRENT
PROTECTOR
IC550
OVERLOAD
DETECT
Q850
AC OUT
DETECT
Q815
UNDER VOLTAGE
DETECT SWITCH
Q506
RELAY
DRIVE
Q814
OVERLOAD
DETECT
Q800
OVERLOAD
DETECT
SWITCH
Q648
RY665
FAN CONTROL
HI SPEED
SWITCH
Q581
SYSTEM
CONTROL
+9V
CN102
+
-
-
+
SURROUND SPEAKER
L
R
TM601
RELAY DRIVE
Q666
72
SW SPK RELAY
61
UNDER VOLTAGE DET
• R-CH is omitted due to same as L-CH.
: AUDIO
Summary of Contents for HCD-GTX88
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