
7
7
XM-444W
3-1. BLOCK DIAGRAM — FRONT SECTION —
SECTION 3
DIAGRAMS
DIFFERENTIAL
AMP
Q102
DRIVE AMP
Q104
S801-1
HPF
(80Hz)
DRIVE AMP
Q108
DIFFERENTIAL
AMP
Q103
DRIVE AMP
Q105
DRIVE AMP
Q109
POWER AMP
Q110
POWER AMP
Q111
BIAS
Q106,107
DIFFERENTIAL
AMP
Q202
DRIVE AMP
Q204
SWITCH
Q201
DRIVE AMP
Q208
DIFFERENTIAL
AMP
Q203
DRIVE AMP
Q205
DRIVE AMP
Q209
POWER AMP
Q210
POWER AMP
Q211
OVERLOAD
DET
Q212
CN802 (1/2)
SPEAKER
OUT
BIAS
Q206,207
(FRONT)
ON
OFF
(FRONT)
ON
OFF
S801-2
HPF
(80Hz)
PRE AMP
IC801 (1/2)
HPF
IC802 (1/2)
GAIN CONTROL
AMP
IC803 (1/2)
-1
-2
-2
R
CNJ802 (1/2)
VR801-2
LEVEL
(FRONT)
HI LEVEL
INPUT
(FRONT)
CNJ801 (1/2)
L
L
R
R
BTL
-1
L (BTL)
OVERLOAD
DET
Q112
SWITCH
Q101
(FRONT)
• Signal path
: AUDIO (FRONT)
(Page 8)
(Page 8)
(Page 8)
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