Block Diagram - Amp Section - Sony HCD-GN88D Service Manual

HCD-GN88D
– AMP Section –
F-L
F-R
STK MUTE
MAIN
J
SECTION
(Page 29)
REAR-L
REAR-R
CENTER
75 78
IC501
POWER AMP
18 10
+
14
9
12
OVER LOAD
DETECT
MUTING Q501, 551
TH502
Q503, 504, 581
THERMAL
DETECT
Q505, 506
Q518
CT VP
4 2
DC DET
D502
OUT
OVER OCP
3 1
LOAD
D391
IC502
OVER CURRENT
OVER LOAD
PROTECTOR
DETECT
Q301, 341, 351
14 6
+
10 5
15 18
IC301
POWER AMP
Q602
VACS
TH501
CONTROL
THERMAL
DETECT
Q514
72
SYSTEM CONTROL
IC501 (4/5)
MAIN
I
SECTION
(Page 29)
DBFB
F/B
+
RY501
PROTECT
SWITCH
Q511
MUTING RELAY DRIVE
D+3.9V
Q621, 671 Q516, 517
D509
MUTING
PROTECT
CONTROL
SWITCH
Q652
Q385
Q510
HP-MUTE
RELAY DRIVE
Q381, 384
RY381
RELAY DRIVE
Q383, 386
RY382
84 85 76 88
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: TUNER (FM/AM)
30 30
J631
PHONES
TM501(1/2)
+
L
+
-
FRONT SPEAKER
IMPEDANCE
+
USE 6-16Ω
R
-
AC CUT DETECT
MAIN
K
SECTION
(Page 29)
AC CUT DETECT
DISPLAY
L
SECTION
(Page 31)
M891
DC FAN
FAN DET
FAN MOTOR
FAN-ON M
DRIVE
FAN-K
Q851-854
TM501 (2/2)
+
L
SURROUND
-
SPEAKER
+ IMPEDANCE
USE 8Ω
R
-
+
CENTER
SPEAKER
- IMPEDANCE
USE 8Ω
83 50