HCD-GTR33/GTR55/GTR77
HCD-GTR33/GTR55/GTR77
35
35
6-20. SCHEMATIC DIAGRAM - MIC, USB AND VOL Board -
1
2
3
4
5
6
7
8
9
10
11
14
15
12
13
A
B
C
D
E
F
G
H
I
J
MIC BOARD
USB BOARD
VOL BOARD
50V
2.2
1.5k
R706
16V
C710
10
RV700
50k
1
3
2
330p
C719
10k
R711
JL702
180p
C722
C701
0.1
C721
0.1
6.3V
100
C711
3
2
50V
2.2
C716
1000p
C702
1000p
C708
220k
R714
18k
R712
50V
C724
0.1
JL703
100
R715
NJM4558V-TE2
(1/3)
IC700
MIC AMP
100k
R716
4.7k
R705
4.7k
R704
100k
R701
C700
0.1
MC2837
D700
JL710
JL711
JL706
JL712
JL720
JL718
JL714
JL713
JL717
JL719
JL722
JL721
JL723
C707
50V
2.2
50V
2.2
C713
TP713
J702
TP712
TP711
C779
0.1
TP714
JL724
MC2837
D701
JL716
R700
1k
R702
10k
ET701
ET702
JL708
C712
47p
1
8
3
4
5
6
7
NO700
8P
MIC SIGNAL
HP-R
MIC GND
A+9V
MIC/HP-DET
HP-L
HP-GND
R720
100k
R721
18k
R722
10k
R723
18k
R724
47k
R725
10k
C777
1000p
J700
JL725
JL726
JL727
JL728
JL730
JL731
1000p
C780
C782
1000p
JL732
MIC
5
2
PHONES
3
1
4
(CHASSIS)
E
(CHASSIS)
E
4.5
4.5
4.5
IC700
TP0086
15k
R1303
22k
R1304
1
2
3
NO1103
3P
DGND
DET SWITCH
VOL
TP0080
TP0082
TP0081
TP0084
S1301
TP0083
S1302
TP0087
10k
R1302
C1301
1000p
DETECT SWITCH
MASTER
VOLUME
MIC
LEVEL
470
R1001
JL1004
JL1003
JL1001
JL1002
470
R1002
1.5k
R1005
1.5k
R1004
470
R1008
470
R1009
4P
CN1000
1
2
3
4
C1004
0.1
10V
C1003
220
C1002
10
MC2837
D1007
MC2837
D1009
MAZ8068GMLS0
D1019
MAZ8068GMLS0
D1013
MAZ8068GMLS0
D1015
C1013 5p
MC2837
D1008
C1005
10
10V
C1006
220
MAZ8068GMLS0
D1018
4P
CN1001
1
2
3
4
MAZ8068GMLS0
D1011
C1007
0.1
MC2837
D1006
MAZ8068GMLS0
D1017
TP1009
TP1004
TP1010
TP1007
TP1006
TP1020
TP1005
TP1017
TP1012
TP1015
MC2837
D1004
MC2837
D1005
JL001
JL002
4
3
2
1
4P
NO1000
SW/USB_LED
LED SEL B
LED SEL A
USB LED CTRL
1
3
4
5
9P
NO1002
USB A+5V
D- A
D+ A
USB A GND
E
ET1001
E
ET1000
6
7
8
9
USB B+5V
D- B
D+ B
USB B GND
1L0351B12C0MXT02
D1003
1L0351V22F0MIT01
D1002
1L0351B12C0MXT02
D1000
C1010
1000p
C1011
1000p
C1009
0.1
C1008
0.1
(BLUE: POWER ON)
(RED: USB ACCESS)
(BLUE: POWER ON)
(CHASSIS)
(CHASSIS)
REC/PLAY B
PLAY A
USB B
USB B
USB A
C1012 5p
• See page 40 for IC Block Diagrams.