Block Diagram - Amp Section - Sony HCD-GTR33 Service Manual

6-3.

BLOCK DIAGRAM - AMP Section -

HP DET
(Page 16) J
BASS AGC
(Page 16) F
OUT
LINE AMP
(Page 16) D
3 1
IC252
R-CH
MUTING
SW OUT
E LINE AMP
(Page 16)
IC253
HCD-GTR33/GTR55/GTR77
19 10
8
15
MUTING
Q425 Q402
OVER LOAD OVER LOAD
DETECT DETECT
Q800 Q801
POWER
AMP
IC800
OVER LOAD
DETECT
Q802
BUFFER
20 22
Q431
17
MUTING
Q430
MUTING
CONTROL
Q670
58 51
–1
–2
RY800
DC
DETECT
Q803, 806
D807
PROTECT DETECT
Q809, 811
THERMAL
DETECTOR
Q807, 808
TH802
RELAY
DRIVE
Q502
53
SYSTEM CONTROLLER
IC401 (3/4)
17 17
J702
R-CH
PHONES
JK800
+
L
–
FRONT
– SPEAKER
R
+
JK801
(GTR77)
+
L
–
SATELLITE
– SPEAKER
R
+
FAN MOTOR
DRIVE
M101
M
Q697, 699 (FAN)
PROTECT
G (Page 18)
(GTR77)
JK501
+
–
SUBWOOFER
+
–
JK500 (GTR33/55)
+
SUBWOOFER
–
RY500
RELAY
DRIVE
Q500
AC CUT
AC DETECT
H (Page 18)
DETECT
Q501
50 38 52
R-ch is omitted due to same as L-ch.
SIGNAL PATH
: AUDIO
HCD-GTR33/GTR55/GTR77