Read Sony XM-444 Service Manual online
7
7
XM-444
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
7
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
1
6
1
3
CN802 (1/2)
SPEAKER
OUT
BIAS
Q206,207
3
2
2
5
6
(FRONT)
ON
OFF
(FRONT)
ON
OFF
S801-2
HPF
(80Hz)
PRE AMP
IC801 (1/2)
PRE AMP
IC801 (2/2)
HPF
IC802 (1/2)
GAIN CONTROL
AMP
IC803 (1/2)
GAIN CONTROL
AMP
IC803 (2/2)
-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
B
A
C
5
7
HPF
IC802 (2/2)
5
VR801-1
LEVEL
(FRONT)
3
1
7
SWITCH
Q101
(FRONT)
• Signal path
: AUDIO (FRONT)
(Page 8)
(Page 8)
(Page 8)
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