Page 1
77
XM-222MK2
3-1. BLOCK DIAGRAM
SECTION 3
DIAGRAMS
DIFFERENTIAL AMP
Q102 DRIVE AMP Q104
S801-1
LPF
(80Hz)
DRIVE AMP Q108
DIFFERENTIAL AMP
Q103 DRIVE AMP Q105 DRIVE AMPQ109
POWER AMP Q110
POWER AMPQ111
BIAS
Q106,107
7
DIFFERENTIAL AMP
Q202 DRIVE AMP Q204 SWITCHQ201
MUTEQ851
DRIVE AMP Q208
DIFFERENTIAL AMP
Q203 DRIVE AMP Q205
DC DETIC851
DRIVE AMP Q209
POWER AMP Q210
POWER AMPQ211 OVERLOADDET
Q212
POWER/
PROTECTOR LD801
1
4 2
12
1
3
16
13 14
B+
SWITCH Q902
POWERON/OFF Q901
15V REG
Q951,952, D953
INVERTER Q903
INVERTERQ904
3
2
7 5
CN802
SPEAKER OUT
CN801
BIAS
Q206,207
9
10 LED
DRIVE Q803
TH801
D802 TH802
32
6
56
ON
OFF
S801-2 LPF
(80Hz)
ON
OFF
PRE AMP
IC801 (1/2)
PRE AMP
IC801 (2/2) LPF
IC802 (1/2) GAIN CONTROL
AMP
IC803 (1/2)
GAIN CONTROL AMP
IC803 (2/2) VR801-1
LEVEL
CNJ802
LPF
IC802 (2/2)
B+
(14.6V)
B-
(-14.6V)
B+
(26.2V)
B-
(-26.2V) DC-DC CONVERTER
TRANSFORMER T901
RECT
D951,952 2
15
ERROR
ERROR
DC-DC CONVERTER IC901
THERMALQ801
F901
20A
+12V
HI LEVEL
INPUT
REM
GND
L
LR
R
BTL
-2 R
-1
L (BTL)
OFFSET DET
Q852,853
OVERLOAD DET
Q112
1
-2 -1
CNJ801
7
SWITCH Q101
3 1
5
VR801-2
LEVEL
PROTECTOR Q802
-15V REG
Q953,954, D954
- Signal path
: AUDIO
Page 2
99
XM-222MK2
3-3. SCHEMATIC DIAGRAM - Refer to page 10 for IC Block Diagram and Common Note on Schematic Diagrams.
C119
C120
C219 C220R138
R139
R239
R238
C117
C118
C218
C217
R137
R237
C858 C101
C201
C202 C106
C206
C853
C105
C205
C103
C203 C854
C855 C104
C204
C107
C108
C208
C207 C111
C211
R861
R860R101
R102
R201
R202 R103
R104
R204
R203 R106 R107
R105
R108 R110R111
R109 R112
R113
R213
R211
R212
R210
R209
R208
R205
R207R206 Q101
Q201
C102
S801 Q107
Q108
Q109 Q110
Q111 Q112
R115 R117D102 R121
C114
R120 R119
R114 R116
D101
C113
R122
R123R124
C115
R125 R126
R127 R129
R130 R133
R118
Q105 Q104
Q102
Q103
C112 R131 R132
R215 R214 R216
Q202D201
C213 R218
Q204
R219
C214 R220
Q205
R217 D202
C212 R231 R221
R232
R223
R222
R224
Q207
C215
R225 Q208
R226 Q210
R229 R233
Q212
R230
R227 Q211
Q209
R915
R918 R916
R919
R917
R920 D903
D904 C907
C908 C951
C952
C953
C954
R951
R956 R952
R953
R957 R958
C955
C956
D953
D954C957
C958
R954
R955
R959 R960
Q852
R856
R857
C852
R858
R851
R852
R853 R854
D852
D851
Q853
Q851
R901 R902 R903 R904Q901
D901 R905
R906
D902 R862
Q902
C801 R801
R803 R814
R802
D803 D801
R804 IC901
R913 R912
C909
R914
R909C903
C905
R910
D802
TH801 TH802
R805
R806
R808 R807
C803 R809
R810
R811R812
Q803 R813LD801
R859 C116
C216
R235
R236 R136
R135
C805
PL801 R855
C901 R961 C959
CNJ802
CNJ801
IC801 (1/2)
IC801 (2/2) IC802 (1/2)
IC802 (2/2) IC803 (1/2)
IC803 (2/2)
VR801 C856
C857
R128
CN802
Q106
Q206
Q203
Q951Q952
Q953 Q954
D952
Q903
Q904 D951
T901
IC851
Q802
C906 R911
CN801
Q801
R907
F901
C902 R228
C109
C110
C210 C209
L951
C851
C802 C904C804
L901
IC B/D
- Waveform
IC901 5
1
1V/DIV, 5µsec/DIV
15µsec
3.4Vp-p
