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HCD-GN880
30
30
HCD-GN880
7-4. BLOCK DIAGRAM – MAIN SECTION –
–
AUDIO1–DATA
AUDIO1–CLK
65
61
39
66
M891
(FAN)
+
–
+
–
+
–
–
+
FRONT
SPEAKER
L
R
L
R
PHONES
J851
RY646
VL (AC)
SYSTEM CONTROL
IC401 (3/4)
CD L-CH
A
CD SECTION
(Page 28)
TAPE L-CH
C
TUNER L-CH
F
TUNER/TAPE DECK
SECTION
(Page 29)
TUNER/TAPE DECK
SECTION
(Page 29)
E
TUNER/TAPE DECK
SECTION
(Page 29)
TM602 (1/2)
TM601 (1/2)
TM602 (2/2)
TM601 (2/2)
D654
D655
FAN MOTOR
DRIVE
Q851, 852
FAN MOTOR
ON SWITCH
Q629
OVER LOAD
DETECT SWITCH
Q648
OVER LOAD
DETECT
Q668, 618
M
HEADPHONE MUTING
Q640, 641
MUTING CONTROL
SWITCH
Q634, 682
RY665
JW691
+
+
TH629
TH630
D760
+
D627
MUTING
Q570
MUTING CONTROL
SWITCH
Q505, 506
STANDBY
SWITCH
Q604, 606, 610
R-CH
D624
R-CH
R-CH
28
27
34
35
TONE/
VOLUME
CONTROL
SOUND
CONTROL
CIRCUIT
INPUT
SELECT
SWITCH
R-CH
R-CH
INPUT SELECT SWITCH,
TONE CONTROL,
ELECTRICAL VOLUME
IC101 (2/2)
4
3
1
59
DATA
AMS
CLOCK
6
2
29
10
8
+
CPU
INTERFACE
R-CH
J501
L
R
VIDEO/MD
(AUDIO) IN
R-CH
RV801
J850
J504
L
R
GAME
INPUT
REC L-CH
SPEANA
D
TUNER/TAPE DECK
SECTION
(Page 29)
H
DISPLAY SECTION
(Page 31)
MIC
AUDIO
VIDEO OUT
VIDEO
J801
MIC AMP
IC850 (1/2)
FEED BACK
SWITCH
Q101
SURROUND
SPEAKER PROTECT
RELAY DRIVE
Q666
FRONT SPEAKER
RELAY DRIVE
Q644, 647
POWER AMP
IC600
OVER CURRENT
PROTECTOR
IC627
MIC
LEVEL
MIC AMP
IC850 (2/2)
+
SUB WOOFER
OUT
J700
RY760
CN504
AD-KEY
VOLUME
SW-MATRIX-SURR-1-LED
SW-LINK-LED
SW-ON-LED
SW-MATRIX-SURR-2-LED
SUB WOOFER
PROTECT
RELAY DRIVE
Q762, 764
SYSTEM
CONTROL
OVER LOAD
DETECT
Q730, 780
78
FR RELAY
72
REAR/SW-RLY
34
LINE MUTE
77
LINK-RELAY
79
HP MUTE
33
HP DET
81
PROT
69
AC CUT MAIN
94
THERMAL VACS
80
STK-MUTE
TEMPERATURE
DETECT SWITCH
Q628, 630
7
9
4
10
2
WOOFER AMP
IC801
POWER AMP
IC700
STANDBY
SWITCH
Q720-722
2
TXD1
REC MUTE
STB
XTCN
RESET
3
RTS1
6
CLK1
31
35
36
37
38
95
100
SW MUTE
EVER +4V
CNVSS
TCN/
MICDET
AMS-IN
AMS MUTE
SW-MATRIX-SURR-1-LED
SW-MATRIX-SURR-2-LED
SW-LINK-LED
SW-ON-LED
SW AD KEY
CNVCC
9
7
RXD1
9
RESET
ON BOARD
PROGRAM
MCU VCC
CN VSS
5
8
CN512
53
25
14
18
11
10
8
9
12
4
3
+
CT
OUT
1 OCP
2 VP
BIAS
Q721
Q402
4
5
6
8
7
15
17
14
EQ
B
CD
SECTION
(Page 28)
G
DISPLAY
SECTION
(Page 31)
D501
AMS AMP
Q115-117
DRIVE
Q124, 526, 527
14
JW681
SURROUND
SPEAKER
1
7
6
2
3
4
5
8
9
1
2
4
5
6
7
8
• R-ch is omitted due to same as L-ch.
• Signal path
F
: TUNER (FM/AM)
E
: TAPE PLAY
G
: REC
J
: CD PLAY
q
: VIDEO/MD (AUDIO) IN
j
: GAME INPUT (AUDIO)
k
: GAME INPUT (VIDEO)
N
: MIC INPUT