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M E M
A F O
CHANNEL_1 I
N
F
E
N
I
PHANTOM
C T
+48V PEAK & SIGNAL LED T O
R
POWER AMP1
Lo-Z MAIN PA1
HA EQ
POWER AMP1
EFFECT
Hi-Z INV
MONITOR BRIDGE
PAD SW. BRIDGE SLD/SWA POWER AMP2
GAIN LOW MID HIGH 3 1
MON/MAIN 2
PA2
B
6 4 POWER AMP2
CHANNEL_2..4 AS SAM AS CHANNEL_1 5
CHANNEL_5
PHANTOM PEAK & SIGNAL LED REC. OUT
+48V
DISPLAY
MIC MAIN
MAIN MASTER
MAIN OUT
HA + EQ EQ
EFFECT
LINE1
MAIN/EFF RTN
DISPLAY
GAIN LOW MID HIGH MONITOR
LINE2 125HZ 4KHZ
250HZ 8KHZ
B MONITOR OUT
MON
MASTER 6 4
SLD/SWA
3 1 5
EQ
2
CHANNEL_6..9 AS SAME AS CHANNEL_5
MON/EFF RTN
125HZ 4KHZ
250HZ 8KHZ
AUX IN_LEVEL REVERB
AUX/IN
FOOT/SW
SUM
1 TAPE IN_LEVEL V L S D O
O N
C H H D
A A A E
TAPE/IN
L L L L
L L A
Y
2
EFFECT/OUT
EFFECT OUT
CRATE
M
E O Title
F N
F I PX900DLX BLOCK DIAGRAM
M T
E
A O Size Document Number REV
C
I R
T B BLOCK.SCH A
N
Date: April 14, 2000 Sheet 1 of 20
G1
G1
+15V
R152
JK101 +48V G2
+48V G2 102pF 1K
PLUG AC FEMALE +15V C126 LED101
+15V
C103 -15V
-15V
2+ 3- 2 SW101A
C136 G_LED
Lo-Z G_LED
10uF/63V LN 3 1
1
Q105
22uF/16V LN
R103 2SC1815
R160 R107 R153
6.8K# 10
5.11K#
R111 Q106
R104
MPSA13 1M
390 1/4W
+48V
10 R150
R151 C135
R161 +15V 270K 2.2K 0.1uF
R109
C101 R101 511# C105
4.7K#
47uF/63V 100K R102 470pF
6.8K#
R116 R117
2.2K# 2.2K#
SW101B C137
6 4
R162
5.11K#
5 22uF/16V LN
C102 R106
10
10uF/63V LN PAD SW:TCH R119 47K
R110
DPDT Q101 Q102
JK102 C2240 C2240 C111 56pF
10 D101
R133 C121
PHONEJACK STEREO
C104 C110 C123 1N4148
R108 R112
470pF 2 22 100pF -15V
3.9K# 4.7K#
10uF/25V 1 3
0.01uF
R135 R? C106 VR107 C108 C107
Hi-Z 4
100K 100K 470pF 10K05C 470uF/10V 470pF C112
IC101A 10uF/25V
GAIN 2
1
3
R114 R115
4558
8.2K# 8.2K#
R132 C120
8
C122
3.9K# -15V +15V
10uF/25V
R118
47K
R134 R? 0.01uF
100K 100K
C109
56pF
D102
VR103
50KB 1N4148
HIGH R125 3.3K
C116
0.0022uFM
R124
3.3K
R123 2.7K
R131
18K
VR104 MON
C114 MON
20KA
0.015uF
MON
R122 +15V
2.7K
C117
VR102 100pF
IC102A C124
50KB
0.01uF
MID 8 4558 C119
C115
47uF/25V
0.022uF 3
1
2 R128 220
R120 VR106
R127 20KA
10K
LEVEL R129
3.9K Q103
4 18K
R126 -15V 2SC2878 AIN
AIN
10K
C118 27pF C125 VR105 EFF
EFF
0.01uF 20KA
R130
EFF
R139 18K
R121 10K
VR101 22K CRATE
50KB
LOW Title
48V_MUTE PX900DLX CH_1 IN/OUT
Size Document Number REV
C113
B CH_1.SCH A
0.027uFM
Date: April 14, 2000 Sheet 2 of 20
G1
G1
JK201 +48V G2 +15V
+48V G2 102pF
PLUG AC FEMALE +15V C226
+15V R252
C203 -15V
-15V 1K
2+ 3- 2 SW201A LED201
C236 G_LED
Lo-Z G_LED
10uF/63V LN 3 1
1
R260 22uF/16V LN
R203
5.11K# R207
Q205
6.8K# 10 R211
2SC1815
R253
R204 10
390 1/4W
+48V Q206
1M
MPSA13
R261 +15V
R209
C201 R201 511# C205 R251
4.7K#
47uF/63V 100K R202 470pF 270K R250 C235
6.8K# 2.2K 0.1uF
R216 R217
2.2K# 2.2K#
SW201B C237
R262 6 4
5.11K#
5 22uF/16V LN
C202
R206
10
JK202 10uF/63V LN PAD SW:TCH R210
R219 47K
PHONEJACK STEREO R233 C221 10
Q201 Q202
C2240 C2240 C211 56pF
3.9K#
10uF/25V
C204
R208 R212
R235 R236 470pF 2 C210
Hi-Z 4.7K# 22
100K 100K 1 3 100pF D201
1N4148
C206 VR207 C208 C207 IC101B
470pF 10K05C 470uF/10V 470pF C212
4558 10uF/25V
GAIN 6
R232 C220 7
5
R214 R215
3.9K# 8.2K# 8.2K#
10uF/25V
R234 R237
100K 100K -15V
R218 C209
47K 56pF
D202
VR203
50KB 1N4148
HIGH R225 3.3K
C216
0.0022uFM
R224