QSC PLX Series Technical & Service Manual page 68

8 7
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
INPUT AND FILTER SECTION, CH B
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
N152
C40
SH 4, EURO-INPUTS 100pF-50V-5%
-IN_DPB
-IN_CH-B +IN_CH-B ^C_0805
N151
R123 R129 R135
N475 NEG INPUT
D
A-18, -B
75 5.60K-.1% 5.60K-.1%
J3:18 J4:18
^R_0805
18 18
J9 +14VIC
R RING
J3:19 J4:19
TIP
T 19 19
S A-19, +B
N457
3
J3:17 J4:17 +
17 17 1
A1
U6:1
A-17, GND
2
-
2
MC33078-SMT
3
1
J10
POS INPUT -14VIC
R124 R130 R136
C196
75 5.60K-.1% N154 5.60K-.1%
+XLR_B -XLR_B ^R_0805
N153
.001-5%
C41
SH 2, INPUT-PARALLEL SW
+IN_DPB
^C_1206
100pF-50V-5%
+13IN
SW1:7
J4:11 J3:11 N178
^C_0805
11 11 7 17
DIP-10
A-11, BR-M
DP-BR-F
J5:13 J6:13 N177 D24 N179
SH 4
13 13
C-13, BR-L 4148
C
^D_SOT-23
N182
J5:15 J6:15 N181 D25 N183 R134
15 15
C-14, BR-L 4148 12.7K
BR MONO
STATUS J5:17 J6:17 ^D_SOT-23 ^R_0805
LED
17 17
BR-MONO
N186
R133 CH B INPUT CLAMP
12.7K
N185 J5:18 J6:18
^R_0805
W 18 18
Q50
3904
+13VCL
J5:19 J6:19
^Q_BJTN_SOT-23
19 19
J5:20 J6:20
GAIN
20 20
A1
STEREO - CLAMPED
BR-ON CH_A_SIG N196
R122 R127 BR-MONO - OPEN R137
SH 3
5.90K 2.00K 4.75K
N197
D23
N194 ^R_0805 ^R_0805 ^R_0805
N195 N198
R120 R132
4148 Q46 Q48
^D_SOT-23
7.50K 7.50K
3906 3906
^R_0805 ^R_0805
Q42 ^Q_BJTP_SOT-23 ^Q_BJTP_SOT-23
B
3906
A1
^Q_BJTP_SOT-23
LED-SIGNAL DISPLAY
N249 +14_DISP
R128
1.00K
N251 ^R_1206
Q43
3906
-13VCL ^Q_BJTP_SOT-23
Q44
3906
D26
^Q_BJTP_SOT-23 N253 N254
R125
4.75K
N252
4148
^R_0805
^D_SOT-23
Q45
3906
Q49
^Q_BJTP_SOT-23
3904
^Q_BJTN_SOT-23
N256
Q47
3906
A ^Q_BJTP_SOT-23
D27
PWR GND 4148
^D_SOT-23
J5:11 J6:11
CLIP
11 11 9
P
RED N257 N258
J5:10 J6:10
10 10
LD10
8 7
64
6
DIP SWITCH TABLE, 10-POS
1 - CLIP LIM, CH-A
2 - LF FILT, CH-A
3 - 30 HZ LF, CH-A
4 - PAR INPUT LED
5 - PAR INPUTS, +
6 - PAR INPUTS, -
7 - BR MONO
8 - 30 HZ LF, CH B
9 - LF FILT, CH B
10- CLIP LIM CH B
N156
R148
15.0K
^R_0805
N155 C44 C47 N158
A1
5 U6:2
+
7
.1-5% .1-5%
6
SIGNAL -
MC33078-SMT
POLARITY
INVERTED
SIGNAL
N161 N159
R138
POLARITY
INVERTED
4.75K
^R_0805
NTCBUS
SW1:8
18 8
DIP-10
N162 N163
THERMAL
N160
J4:15 J3:15 SW1:9
N204
15 15 19 9
AND BIAS
DIP-10
A1 N164
A-15, GND
SENSING
N157
N203
R109
1.50K
^R_0805
R140
7.50K P
^R_0805
N206
DISCUSS STAR GND
ROUTE TO SPKR OUTPUT.
R146 R152 R226 = 5.90K for PLC-2
N189 C43
A1 P1
536 5.90K
^R_0805 ^R_0805 N208
100pF-50V-5% +14VIC
^C_0805
A1
N201 U7:2
5 NE5532
U7:1 + N202
3 NE5532 7
+ SIGNAL
POLARITY
1 6
INVERTED -
2
- C49
U_OPAMP_DUAL1
C46
10pF-50V-5%
47-10NP-10%
N191
R139 ^C_0805
-14VIC
12.7K
^R_0805
SPKR_BUS_B
R147 R153
1.50K 16.5K-1/2W-1%
^R_0805
C50
15pF
+13IN
SW1:10
10 20
DIP-10
J3:16 J4:16
16 16
A-16, CLIP-B
+13VCL
N266
^Q_BJTP_SOT-23
N265
Q51
3906
^Q_BJTP_SOT-23 Q54
3904
^Q_BJTN_SOT-23
N270
U3:2
N271
LM13600M
14 Q55
+
3906
10 12 15
^Q_BJTP_SOT-23
13
-
Q52
N274
3904
^Q_BJTN_SOT-23 Q53
3904
P
R141
^Q_BJTN_SOT-23
N275
20.0K
P
^R_0805
J5:9 J6:9
9
N259
-13VCL
6
5 4
N169
POS STEP DRIVER
N165
N166
POSREF
N167
N168
.36W at full clip
Q59
N212
3906
Q69
TH-SUBC-B
^Q_BJTP_SOT-23 3906
N150
^Q_BJTP_SOT-23
Q63
+15NTC
R164
N210 3904
N211
1.50K
^Q_BJTN_SOT-23
^R_0805
+15NTC
N479
P
250 R383
P
100
VR166 N207
^R_0805
CCW CW
Q61
300V-.2A
^Q_BJTN_SOT-23
MUTE+
N231
SEE SH 4
N232
Q62
300V-.2A
P
^Q_BJTP_SOT-23
N209
N480
P
C55
R384
P
-15NTC
.0027 100
^R_0805
^C_0805
-15NTC
R171
3906
N233
^Q_BJTP_SOT-23
2.00K
N237
^R_0805
Q70
3904
Q60
^Q_BJTN_SOT-23
3904
N239
^Q_BJTN_SOT-23
Q57
3906
N238
PROT
Q58
SH 2
3904
^Q_BJTN_SOT-23
DC_SENSE
R173
DATAPORT, SH 4, CLIP B
SH 4
20.0K
N269 CLIP_B
R167
^R_1206
383
N276
^R_0805 NEGREF
P
CLIP-LIMIT
N278
PROCESSOR
NEG STEP DRIVER
5 4
3 2
N172
N174
N170
N173
N171
POS OUTPUT SECTION
P
R199
12.7K
^R_0805
N213 D34
N214
4148 2SA1302 2SA1302 2SA1302 2SA1302
Q71
^D_SOT-23
MJE15033
D39
Q73 Q79 Q81 Q84
4148
^D_SOT-23
N216
N221
I-MON-B, SH 4
N222
L-Z_B1
D41
Q64
D
N227
2SC4793
L2
200V-.2A-50NS
1 2
N224
^D_SOT-23
2UH-14GA-AIR
Q65
SPKR-B
2N3904
N225
SPKR_BUS_B
R221
5.6-2W
E11A
N229
N226 C62
R368
15-2W
.022 E12A E12B
R203
5.6-2W
P P1
N234
PWR-GND, TO SUPPLY CT
Q66
2N3906
D38
N235
Q67 200V-.2A-50NS
2SA1837 ^D_SOT-23
N236
Q68
Q72
N242
MJE15032
D37
Q74 Q80 Q82 Q85
4148
^D_SOT-23
N243
2SC3281 2SC3281 2SC3281
2SC3281
N240 N241
R200
12.7K
^R_0805
D33
4148
^D_SOT-23
NEG OUTPUT SECTION
N279
V-NEGSTEP
N277
N280
-HI-RAIL
3 2
1
+HI-RAIL
D
+MID-RAIL
D47
JUMPER
C
E10
EMI_G
E11C
N464
BR-POS
E11B
TO CH A
SHEET 2
N465
BR-NEG
E12C
B
N248
D46
JUMPER
-MID-RAIL
A
SIZE FSCM NO. DWG NO. REV
SH-000516-00
D B
SCALE CAD FILE NO. SHEET
NONE plx1602.sch 3 OF 5
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