Sony HCD-GN77D - Block Diagram: AMP Section; Power Amplifier Blocks; System Control and Protection Circuits

HCD-GN77D
3030
– AMP Section –
IC501
POWER AMP
IC301
POWER AMP
IC502
OVER CURRENT
PROTECTOR
: TUNER (FM/AM)
MUTING
Q503, 504, 581
F-R
DBFB
F/B
F-L
REAR-R
CENTER
REAR-L
75 78
STK-MUTE
72
VACS IN
PROTECTOR
STK-MUTE
10
15
14
4
3
12
STK MUTE
FAN DET
FAN-ON
FAN-K
OVER LOAD
DETECT
Q501, 551
+ +
+
+
MUTING
Q621, 671
MUTING
CONTROL
Q652
F-RELAY
HP-DET
HP-MUTE
FAN-K
50
HP-DETECT
76
HP-MUTE
83
FRONT-RELAY
88
FAN KICK
OVER LOAD
DETECT
Q301, 341, 351
RELAY DRIVE
Q516, 517
H/P DET
F-RELAY
HP-MUTE
+
-
-
+
FRONT SPEAKER
IMPEDANCE
USE 6-16Ω
SURROUND
SPEAKER
IMPEDANCE
USE 8Ω
CENTER
SPEAKER
IMPEDANCE
USE 8Ω
L
R
PHONES
J631
RY501
D+3.9V
SYSTEM CONTROL
IC501 (4/5)
TM501(1/2)
MAIN
SECTION
(Page 29)
J
MAIN
SECTION
(Page 29)
M
FAN MOTOR
DRIVE
Q851-854
DC FAN
M891
AC CUT DETECT
AC CUT DETECT
TH502
TH501
Q518
THERMAL
DETECT
Q505, 506
THERMAL
DETECT
Q514
Q602
VACS
CONTROL
+
+
+
85
CENTER-RELAY
84
LINE-RELAY
(REAR L/R
SURR RLAY)
RY381
RY382
TM501 (2/2)
L
R
RELAY DRIVE
Q383, 386
RELAY DRIVE
Q381, 384
I
MAIN
SECTION
(Page 29)
K
DISPLAY
SECTION
(Page 31)
L
5
18
6
OVER
LOAD
DC DET
VP
OCP
CT
OUT
D502
D391
2
1
D509
PROTECT
SWITCH
Q511
Q510
PROTECT
SWITCH
Q385
18 10
14
9
-
-
-
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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