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HCD-XGR88
– MAIN SECTION –
J802
MIC1
J801
MIC AMP
+
MIC2
IC850 (1/2)
RV801
MIC LEVEL
VC
VREF
A+9V
Q884
CD-L
(Page 22)
A
PB-L
(Page 23)
B
ST-L
D
(Page 23)
FUNCTION SELECT
VREF
+9V
Q611
SWITCH
IC181
VC
J701 (1/2)
PHONO
X0
X
EQ AMP
L
12
13
PHONO
X1
IC601
14
IN
X2
R
R-CH
15
X3
11
L
A
B
MD IN
10
9
R
R-CH
Q181
Q182
J500 (2/2)
L
FRONT
INPUT
AUDIO
R
R-CH
J500 (1/2)
MUTE
FRONT
Q471
INPUT
VIDEO
1
D462
20
J721
2
3
MUTEOL
VIDEO OUT
AMP
IC422 (2/2)
22
PWML+
24
PWML–
XIS
XOS
28
X401
8.19MHz
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: TUNER (FM/AM)
: CD PLAY
: TAPE PLAY
: RECORD
: MIC INPUT
MIX AMP
IC422 (1/2)
MIC OUT
MIC AMP
+
6
7
IC850 (2/2)
2
8
INPUT SELECT SWITCH,
GRAPHIC EQUALIZER CONTROL,
ELECTRICAL VOLUME
IC111
INC1
5
INB1
INPUT
4
+
INA1
SELECT
3
IND1
SWITCH
6
SURROUND OR
DPL BUFFER
INEX1
7
+
R-CH
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC501 (3/4)
XC-OUT
11
EQIC-DAT
80
X501
EQIC-CLK
81
32.768kHz
10
XC-IN
13
X-OUT
X502
TEMP DET
97
16MHz
AUDIO-OUT 1
15
X-IN
71
AU-SEL0
72
AU-SEL1
D461
Q802,803
LEVEL SHIFT
66
ML-MUTE
LINE-MUTE 82
R-CH
STK-MUTE 83
4
60
ML-RESET
TSTB
HP-MUTE
86
MCK
6
7
PARTY-CLK
MSD
7
6
PARTY-DATA
MLAB
8
59
ML-WR
MEMP
9
54
ML-BUSY2
TEMPO
10
42
PARTY-TEMPO
27
RHYTHM
PHRASE
PROTECT
88
PLAYER
IC461
FRONT-RELAY 87
HP-IN 95
R-CH
C
VL
MID/
F OUT2
IN1
A
VOLUME
BASS &
14
15
CONTROL
B
TREBLE
C
CPU
A
COMMAND
R-CH
INTERFACE
B
L+R
+
19
21
SPEANA
E
(Page 25)
POWER AMP
18
11
IC801
12
TEMPERATURE
MUTE
DETECT SWITCH
Q114
Q842, 843
TH831
STANDBY SWITCH
Q803, 804, 834
TEMPERATURE
DETECT SWITCH
Q831, 832
D401
OVER LOAD
DETECT
R-CH
Q801, 851
+
R-CH
POWER AMP
14
9
IC101
OVER LOAD
DETECT
R-CH
Q101, 151
24
24
Q805,806
SWOUT
+
LEVEL SHIFT
NC
24
OUT1
18
22
16
17
R-CH
Q115
D803
+
Q166,167
–1
R-CH
–2
R-CH
DBFB
R-CH
MUTE
Q805,855
DELAY
Q833
PROTECTOR
IC912
1
OCP
F
(Page 25)
RY401
AC DET
PROTECT SWITCH
Q431
2
VP
CT
4
Q923
OUT
3
FRONT SPEAKER PROTECT
RELAY DRIVE
Q401, 402
D410
R-CH
RY402
REC-L
C
(Page 23)
L
MD OUT
MUTE
R-CH
R
Q701
J701 (2/2)
FAN MOTOR
M901
B+
(FAN)
FAN MOTOR
M
DRIVE
Q961, 962
TM401
TWEETER & WOOFER
IMPEDANCE
USE 6 – 16Ω
+
L
–
+
R
–
J891
PHONES
TM402
SUPER WOOFER
IMPEDANCE
USE 6 – 16Ω
+
L
–
+
R
–
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