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7-3.
BLOCK DIAGRAM – MAIN Section –
(GRX50: Saudi Arabia)
DIGITAL ECHO
IC711
J711
MIX MIC
MIC AMP
IC712 (1/2)
RV712
MIC LEVEL
CD-L
(Page 20)
A
IN E2
65
PB-L
IN D2
B
(Page 22)
66
INPUT
IN B2
68
SELECT
IN A2
69
SWITCH
IN C2
67
J101 (1/2)
L
R-CH
VIDEO
(AUDIO) IN
R
R-CH
INPUT SELECT SWITCH,
GRAPHIC EQUALIZER CONTROL,
ELECTRICAL VOLUME
L
IC101
MD IN
R
R-CH
SPEANA
(Page 25)
D
(R770/RXD7: AEP)
FM 75
COAXIAL
FM/AM TUNER UNIT
FM ANT
ST-L
FM
75
ST-R
R-CH
FM ANT
ST-MUTE
AM ANT
STEREO
AM
TUNED
AM ANT
ST-DIN
ST-DOUT
ANTENNA
ST-CLK
ST-CE
(R770/RXD7: AEP)
(GRX50/RXD7: Canadian)
RDS-DATA
RDS-INT
• SIGNAL PATH
: TUNER (FM/AM)
: CD PLAY
: TAPE PLAY
: RECORD
: MIC INPUT
05
RESET
E
(Page 25 )
RV711
ECHO LEVEL
MIC AMP
IC712 (2/2)
2
58
GRAPHIC EQUALIZER
+
CONTROL CIRCUIT
+
R-CH
SOUND
CONTROL
L+R
+
CIRCUIT
30
60 5
59 6
493-DATA
47
493-CLK
48
493-LATCH
38
D607
DBFB-H/L
7
D644
BASS FREQ.
44
SYSTEM CONTROLLER
IC501 (3/4)
49
ST-MUTE
50
STEREO
TUNED
51
53
ST-DOUT
54
ST-DIN
55
ST-CLK
STK-MUTE
1
52
ST-CE
21
RDS-DATA
20
RDS-INT
LINE-MUTE
6
AC-CUT 22
RESET SWITCH
RESET
12
Q501
11
XC-OUT
X601
32.768kHz
PROTECTOR
27
10
XC-IN
F-RELAY
3
13
X-OUT
X613
16MHz
15
X-IN
RY-SW 36
– 23 –
R-CH
+
57
VOL
BASS BOOST
IN2
F OUT2
VOLUME
42
41
CONTROL
CONTROL
CIRCUIT
CPU
COMMAND
INTERFACE
+
38, 39
33
32
34
DBFB CONTROL
SWITCH
Q111
POWER AMP
IC801
MUTING
(EXCEPT RXD7: Canadian)
Q113
STANDBY SWITCH
R-CH
Q803, 804, 881
TH831
DETECT SWITCH
+5V
MUTING CONTROL
SWITCH
OVER LOAD
Q508, 509
DETECT
Q801
RESET SIGNAL
GENERATOR
IC502
DC DETECT
+
SWITCH
Q433, 434
R-CH
(GRX50/RXD7: Canadian)
SUPER
WOOFER
72
D191
BUF
OUT2
PROTECT
36
SWITCH
Q192
37
FEED BACK
R-CH
SWITCH
Q112
D141
+
R-CH
–1
BASS FREQUENCY
CONTROL SWITCH
Q201
–2
R-CH
R-CH
R-CH
R-CH
Q411, 471
TEMPERATURE
Q831, 832
MUTING CONTROL
SWITCH
Q412
D803
+
OVER LOAD
OVER LOAD
DETECT SWITCH
DETECT SWITCH
R-CH
Q432
Q437
PROTECT SWITCH
Q439
PROTECT SWITCH
Q435, 436
– 24 –
HCD-GRX50/R770/RXD7
REC-L
C
(Page 22)
L
MD OUT
R-CH
R
J101 (2/2)
J191
SUPER
MUTING
WOOFER
Q191
(EXCEPT RXD7: Canadian)
M501
(FAN)
M
FAN MOTOR
DRIVE
Q401, 402
TM401
SPEAKER
IMPEDANCE USE 6 – 16
+
L
–
+
R
–
MUTING
J701
PHONES
RY401
RELAY
DRIVE
Q431
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