Diagrams; Block Diagram -Front Section - Sony XM-444 Service Manual

SECTION 3

DIAGRAMS

3-1. BLOCK DIAGRAM — FRONT SECTION —
PRE AMP
IC801 (1/2)
-1
-1
2
L (BTL)
1
3
CNJ801 (1/2)
INPUT
(FRONT)
PRE AMP
IC801 (2/2)
-2
-2
5
R
7
6
CNJ802 (1/2)
HI LEVEL
L R
HPF
GAIN CONTROL
IC802 (1/2)
AMP
IC803 (1/2)
5 7
5
SWITCH
7
Q101
6
S801-1
HPF
(80Hz)
VR801-1
(FRONT)
LEVEL
ON
(FRONT)
OFF
HPF
GAIN CONTROL
IC802 (2/2)
AMP
IC803 (2/2)
3 1
3
SWITCH
1
2 Q201
S801-2
HPF
(80Hz)
VR801-2
(FRONT)
LEVEL
ON (FRONT)
OFF
C
(Page 8)
7
DIFFERENTIAL
DRIVE AMP DRIVE AMP POWER AMP
AMP
Q104 Q108
Q102
BIAS
Q106,107
DIFFERENTIAL
DRIVE AMP DRIVE AMP POWER AMP
AMP
Q105 Q109
Q103
DIFFERENTIAL
DRIVE AMP DRIVE AMP POWER AMP
AMP
Q204 Q208
Q202
BIAS
Q206,207
DIFFERENTIAL
DRIVE AMP DRIVE AMP POWER AMP
AMP
Q205 Q209
Q203
7
CN802 (1/2)
SPEAKER
OUT
(FRONT)
Q110
L
OVERLOAD
DET
Q112
Q111
BTL
B
(Page 8)
Q210
R
OVERLOAD
DET
Q211
Q212
A
(Page 8)
• Signal path
: AUDIO (FRONT)
XM-444