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7-3.
BLOCK DIAGRAM – MAIN Section –
REC L-CH
D
(Page 24)
J750
L
MD/VIDEO
8
(AUDIO) IN
R
R-CH
+
CD L-CH
A
(Page 23)
IND1
6
INB1
INPUT
4
TUNER L-CH
INC1
SELECT
B
(Page 24)
5
SWITCH
INA1
3
SOUND
TAPE L-CH
CONTROL
C
(Page 24)
CIRCUIT
INEX1
7
2
19
J601
L
AUDIO
J401
R
R-CH
GAME
VIDEO OUT
INPUT
VIDEO
RV722
MIC LEVEL
J721
MIC AMP
MIC AMP
MIC
IC722 (1/2)
IC722 (2/2)
MIC
CONTROL
Q721
A +10V
SPEANA
E
(Page 26)
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: TUNER (FM/AM)
: TAPE PLAY
: REC
: CD PLAY
: MD/VIDEO (AUDIO) IN
: GAME INPUT (AUDIO)
: GAME INPUT (VIDEO)
: MIC INPUT
FEED BACK
INPUT SELECT SWITCH,
SWITCH
TONE CONTROL,
Q101
ELECTRICAL VOLUME
IC102
16
17
+
R-CH
R-CH
OUT1
18
TOUT1
VOLIN1
VOLUME
14
15
CONTROL
R-CH
+
R-CH
MUTING
CPU
Q103
INTERFACE
MUTING CONTROL
SWITCH
24
21
22
Q504, 505
81 82
R-CH
D841
POWER AMP
IC501
R-CH
STANDBY
OVER LOAD
SWITCH
DETECT
Q503, 504, 581
R-CH
Q501, 551
DC DETECT
SWITCH
Q507, 508
D502
OVER LOAD
+
DETECT SWITCH
Q509
PROTECT SWITCH
TEMPERATURE
DETECT SWITCH
Q505, 506
FAN MOTOR
FAN MOTOR
ON SWITCH
DRIVE
Q831
Q891, 892
TH701
80
83
88
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC501 (3/4)
25
25
HEADPHONE MUTING
Q812, 862
MUTING CONTROL
SWITCH
Q861
–2
–1
RY501
FRONT SPEAKER
OVER LOAD
PROTECT
DETECT SWITCH
RELAY DRIVE
Q510, 511
Q512
Q502
M891
(FAN)
M
87
78
79
HCD-RG66T
J631
PHONES
T501
+
L
–
FRONT SPEAKER
IMPEDANCE
+
USE 6–16Ω
R
–
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