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HCD-ZT4
HCD-ZT4
41
41
7-20. SCHEMATIC DIAGRAM - POWERAMP Board -
S
TRANS2
CN903
BOARD
Q
CN890
JACK
SW
BOARD
MAIN
BOARD
CN479
H
(3/4)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16.5
0
0
16.5
0
16.5
0
0
29.7
-29.7
13.5
-13.5
-58.1
-60.3
60.2
0
0
0
0
58.3
0
0
1.9
0
0
0
0
0
0
22k
R857
1N5402-F46
1N5402-F46
D810
47k
R856
0.1
C840
D10XB20
D801
10
R877
50V
47
C820
JL804
2.2k
R834
2SC3052EF-T1-LEF
Q811
10
R878
1
3
4
5
6
7
7P
NO801
AC-VH
AC-VL
GND
GND
AC-VL
AC-VH
R885
100V
0.1
C802
100p
C817
33k
R860
10
R869
C826
50V
C805
3300
D806
0.1
C807
0.1
C837
1k
R863
2.2k
R883
MA2J1110GLS0
D803
C833
0.1
R826
100
R805
47k
R884
10
R872
100k
R838
100
R816
JL807
100V
0.1
C801
C835
0.1
100
R815
1k
R886
0.1
C839
100
R819
10
R879
ISA1235AC1TP-1EF
Q809
10
R871
2SC3052EF-T1-LEF
Q806
JL802
10k
R851
0.1
C838
4.7k
R850
R848 3.3k
10
R875
10
R874
E
EP800
100k
R806
50V
3300
C806
50V
2.2
C830
R841
10
2SC3052EF-T1-LEF
Q803
2SC3052EF-T1-LEF
Q808
2SC3052EF-T1-LEF
Q807
Q807, 808
TEMPERATURE DETECT
D10XB20
D800
C804
R810
10
5W
0.22
R831
MA2J1110GLS0
D807
100k
R882
MC2836
D802
100k
R839
100p
C816
47k
R830
1
R861
10V
100
C829
22k
R837
22k
R836
5W
0.22
R832
47k
R824
JL800
1000p
C814
100p
C815
33k
R859
1000p
C812
47k
R825
0.1
~
~
~
~
C808
L802
1.7uH
JL803
100
R862
50V
47
C818
L801
1.7uH
5W
0.22
R833
JL806
R808 10
C803
R840
10
R812 10
100
47
100V
R865
27k
47k
36k
R881
R80910
100
R804
R811 10
82
R817
2.2k
R835
JL801
82
R818
100
R814
R813
10
100k
R807
1000p
C813
100V
C827
47
50V
47
C819
100k
R891
100k
R892
1k
R888
R828
R827
R823
R821
22k
R890
33k
R889
JW806
JL852
JL853
JL854
JL855
JL856
JL857
JL858
JL859
JL860
JL861
JL862
JL863
JL864
JL865
JL866
JL867
JL868
JL869
JL870
RY800
MAZ8160GMLS0
D804
MAZ8160GMLS0
D805
JK800
7P
NO800
RLY-
RLY+
SW OUT
SW OUT
SW-SP_GND
SW-SP_GND
CN801
R-IN
PREGND
L-IN
STK MUTE
PROTECT
UNREG+16V
HP-R
HP GND
HP-L
POWER GND
SPK RELAY
SW ON/OFF
SW IN
MC2838-T112-1
D812
22k
R897
50V
10
C843
1k
R895
13P
R896
R822
33k
R868
R866
R829
15k
R898
15k
R899
47k
R853
33k
R849
47k
R854
100k
R855
390
R852
0
R870
0
JR891
C844 1000p
2.2k
R887
MAZ8160GMLS0
D809
(CHASSIS)
POWERAMP BOARD
680
JR894
0
2200
71V
2200
71V
47k
820
820
820
JR892
0
820
JR893
0
680
R
L
7
11
D
B
6
9
10
F
5
15
K
3
G
1
12
C
E
H
8
J
4
13
A
14
2
I
1
3
4
5
6
7
2SC3052EF-T1-LEF
Q804
2SC3052EF-T1-LEF
Q815
RELAY DRIVE
DC DETECT
1
2
3
4
5
6
7
8
9
10
11
12
13
1W
2.2k
R843
1W
2.2k
R842
2SC5625
Q801
OVER
LOAD
DETECT
2SC5625
Q800
OVER
LOAD
DETECT
2SC5625
Q802
OVER
LOAD
DETECT
+
-
+
-
FRONT
SPEAKER
2SC3052EF-T1-LEF
Q805
RELA
Y
DRIVE
DETECT
LOAD
OVER
Q803
MA2J1110GLS0
D811
PROTECT
Q806, 809, 811
DETECT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
19
18
17
16
20
21
22
23
+VL
-VL
+OFF_SET
-OFF_SET
-PRE
-VH
+VH
+PRE SUB GND
STBY
STK416-120-E
IC800
POWER AMP
IC800
TH801
(Page 42)
(Page 38)
(Page 49)