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HCD-ZT4
HCD-ZT4
25
25
7-3. BLOCK DIAGRAM - AMP Section -
OUT
LINE AMP
IC252
D
BASS AGC
F
SW OUT
E
POWER
AMP
IC800
MUTING
Q402
OVER LOAD
DETECT
Q801
OVER LOAD
DETECT
Q802
R-CH
MUTING
Q430
LINE AMP
IC253
+
R-CH
R-CH
R-CH
MUTING
CONTROL
Q670
LINE MUTE
58
STK MUTE
51
SW SPK RELA
Y
52
+
R-CH
PROTECT
DETECT
Q806, 809, 811
FAN MOTOR
DRIVE
Q690, 691,
Q693 -695,
Q697
RY800
+
–
–
+
RY890
D632
D807
TH801
M
M102
(FAN)
FAN MOTOR
DRIVE
Q110 - 113
M
M101
(FAN)
PHONES
+
–
SUBWOOFER
JK890
RELAY
DRIVE
Q805
FR SPK RELA
Y
53
PROTECT
50
RELAY
DRIVE
Q804
R-CH
J702
SYSTEM CONTROLLER
IC401 (3/4)
: TUNER (FM/AM)
SIGNAL PATH
R-ch is omitted due to same as L-ch.
+
OVER LOAD
DETECT
Q803
R
L
FRONT
SPEAKER
JK800
PROTECT
G
DC DETECT
H
STBY LED
J
HP IN
C
DC DETECT
Q815
LEVEL SHIFT
Q447
TEMPERATURE
DETECT
Q807, 808
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