Block Diagram - Amp/Subwoofer Section - Sony HCD-GTX88 Service Manual

6-5. BLOCK DIAGRAM — AMP/SUBWOOFER SECTION —
POWER AMP
IC601
MAIN
F
18 11
F-L
SECTION
10
(Page 33)
F-R 14 8
9
12
MUTING
Q604, 606, 610
SUBWOOFER POWER AMP
MAIN
H
SW OUT 11 IN1
SECTION
(Page 33)
13 ST BY
STK MUTE
Q812
67
HCD-GTX88
MAIN
I DBFB F/B
SECTION
(Page 33)
D624
+ +
OVER LOAD
MUTE
DETECT
Q640, 641
Q668, 618
MUTE
THERMAL
CONTROL
DETECT
Q634,682,684
Q628, 630
TH629
OVERLOAD
OVER CURRENT
PROTECTOR
IC550
D550
1
OCP CT 4
OUT 3
2 VP
DISPLAY
OVERLOAD
K
/POWER
DETECT
SECTION
Q800
IC800
(Page 36)
+RE1 4
5
–RE1
OVERLOAD
DETECT
Q850
+RE2 6
7
–RE2
RELAY
+VCC 3 +VL
DRIVE
–VCC 2 –VL Q814
TH630
UNDER VOLTAGE
DETECT SWITCH
94 72
RY646
+
RELAY DRIVE
Q644, 647
DETECT
SWITCH
Q648
FAN DETECT
Q580–582
FAN CONTROL
DISPLAY/
J SWITCH
POWER FAN CONTROL
Q584
SECTION
VL(AC)
(Page 36)
HI SPEED
SWITCH
Q581
RY862
AC OUT
DETECT
Q815
Q506
61 69 70 68 88
SYSTEM CONTROL
IC401 (5/6)
35 35
+
-
+
-
+
RY665
-
+
-
RELAY DRIVE
Q666
FAN MOTOR
M892
M
DRIVE
DC FAN
Q586–588
• R-CH is omitted due to same as L-CH.
• SIGNAL PATH
: AUDIO
FAN MOTOR
DRIVE M M891
Q579, 585 DC FAN
+
-
+
-
+9V
71 100 97 95
HCD-GTX88
J1101
PHONES
L
TM600
FRONT SPEAKER
R
L
TM601
SURROUND SPEAKER
R
TB001
L
SUB WOOFER
OUT
R
CN102
SYSTEM
CONTROL