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SECTION 3
DIAGRAMS
3-1. BLOCK DIAGRAM
PRE AMP
IC801 (1/2)
-1
-1
6
7
L (BTL)
5
CNJ801
INPUT
PRE AMP
IC801 (2/2)
-2
3
-2
1
R
2
CNJ802
HI LEVEL
L
R
15V REG
B+
Q951,952,
(14.6V)
D953
-15V REG
B-
Q953,954,
(-14.6V)
D954
RECT
D951,952
B+
(26.2V)
B-
(-26.2V)
LPF
GAIN CONTROL
IC802 (1/2)
AMP
IC803 (1/2)
5
7
5
SWITCH
7
6
Q101
S801-1
LPF
(80Hz)
VR801-1
ON
LEVEL
OFF
LPF
GAIN CONTROL
IC802 (2/2)
AMP
IC803 (2/2)
3
1
3
SWITCH
1
2
Q201
S801-2
LPF
(80Hz)
VR801-2
ON
LEVEL
OFF
MUTE
Q851
DC-DC CONVERTER
TRANSFORMER
T901
INVERTER
Q903
INVERTER
Q904
DIFFERENTIAL
DRIVE AMP
DRIVE AMP
AMP
Q104
Q108
Q102
BIAS
Q106,107
DIFFERENTIAL
DRIVE AMP
DRIVE AMP
AMP
Q105
Q109
Q103
DIFFERENTIAL
DRIVE AMP
DRIVE AMP
AMP
Q204
Q208
Q202
BIAS
Q206,207
DIFFERENTIAL
DRIVE AMP
DRIVE AMP
AMP
Q205
Q209
Q203
DC DET
4
2
IC851
12
9
1
LD801
POWER/
ERROR
2
PROTECTOR
LED
10
3
DRIVE
Q803
15
ERROR
16
THERMAL
13
14
Q801
DC-DC CONVERTER
IC901
TH801
TH802
D802
7
7
CN802
SPEAKER
OUT
POWER AMP
Q110
OVERLOAD
DET
POWER AMP
Q112
Q111
OFFSET
DET
Q852,853
POWER AMP
Q210
OVERLOAD
POWER AMP
DET
Q211
Q212
PROTECTOR
Q802
F901
CN801
20A
B+
SWITCH
+12V
Q902
POWER
ON/OFF
Q901
REM
GND
• Signal path
: AUDIO
XM-222MK2
L
BTL
R
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