HCD-GX8000/RG77
25
25
7-3.
BLOCK DIAGRAM – MAIN Section –
M891
(FAN)
+
–
+
–
+
–
+
–
FRONT SPEAKER
IMPEDANCE
USE 6–16
Ω
L
R
SURROUND
SPEAKER
IMPEDANCE
USE 24
Ω
L
R
PHONES
J631
RY501
• R-ch is omitted due to same as L-ch.
CD L-CH
TAPE L-CH
TUNER L-CH
T501
D507
D511
FAN MOTOR
DRIVE
Q891, 892
FAN MOTOR
ON SWITCH
Q831
OVER LOAD
DETECT SWITCH
Q510, 511
PROTECT SWITCH
Q502
OVER LOAD
DETECT SWITCH
Q509
OVER LOAD
DETECT
Q501, 551
DC DETECT
SWITCH
Q507, 508
M
HEADPHONE MUTING
Q812, 862
MUTING CONTROL
SWITCH
Q861
RY502
+
+
+
TH701
+
TEMPERATURE
DETECT SWITCH
Q505, 506
D502
MUTING
Q103
MUTING CONTROL
SWITCH
Q504, 505
STANDBY
SWITCH
Q503, 504, 581
R-CH
D841
R-CH
R-CH
22
21
INPUT SELECT SWITCH,
TONE CONTROL,
ELECTRICAL VOLUME
IC102
2
24
19
R-CH
J750
L
R
MD/VIDEO
(AUDIO) IN
R-CH
J601
J401
L
R
GAME
INPUT
REC L-CH
SPEANA
MIC
AUDIO
VIDEO OUT
VIDEO
J721
FEED BACK
SWITCH
Q101
: MD/VIDEO (AUDIO) IN
: GAME INPUT (AUDIO)
: GAME INPUT (VIDEO)
: MIC INPUT
SURROUND
SPEAKER PROTECT
RELAY DRIVE
Q513
FRONT SPEAKER
PROTECT
RELAY DRIVE
Q512
–2
–1
RV722
MIC LEVEL
MIC
CONTROL
Q721
A +10V
w w w . x i a o y u 1 6 3 . c o m
Q Q 3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299