Block Diagram - Amp Section - Sony HCD-GT111 Service Manual

7-3.

BLOCK DIAGRAM - AMP Section -

F BASS AGC
(Page 24)
LINE AMP
D
OUT
IC252
(Page 24)
MUTING
Q402
R-CH
LINE AMP
E
SW OUT
IC253
(Page 24)
MUTING
Q430
(GT444/GT555)
(TYPE A)
STANDBY SWITCH
MUTING
CONTROL
Q670
58
HCD-GT111/GT222/GT444/GT555
+
OVER LOAD OVER LOAD
+
DETECT DETECT
POWER
Q801 Q803
AMP
IC800
D807
+
R-CH Q806, 809 - 811 (TYPE A)
Q806, 809, 811 (TYPE B)
DC DETECT
Q812, 814, 815
(TYPE A)
OVER LOAD
DETECT
Q802
(TYPE B)
Q813
51
SYSTEM CONTROLLER
IC401 (3/4)
R-CH
R-CH
RY800
R-CH
D632
PROTECT DETECT
RELAY RELAY
DRIVE DRIVE
Q804 Q805
50 53 52
Note: A part of circuit composition of POWERAMP board has been changed in the midway of production.
POWERAMP board that has not been changed appears as TYPE A, and the changed POWERAMP
board appears as TYPE B.
25 25
C
HP IN
(Page 24)
J702
R-CH
PHONES
JK800
+
L
–
FRONT
– SPEAKER
R
+
FAN MOTOR
DRIVE
M102
M
Q690, 691,
(FAN)
Q693 -695,
Q697
J
STBY LED
(Page 26)
G
PROTECT
(Page 26)
LEVEL SHIFT
Q447
H
DC DETECT
(Page 26)
(GT222/GT444/GT555)
FAN MOTOR
M101
M
DRIVE
(FAN)
Q110 - 113
JK890
+
SUBWOOFER
–
RY890
(TYPE B)
DC DETECT
Q815
R-ch is omitted due to same as L-ch.
SIGNAL PATH
: TUNER (FM/AM)
HCD-GT111/GT222/GT444/GT555
Ver. 1.2