QSC K Schematics
4
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
3
2
REV DESCRIPTION
A
PROD RLSE W/O CHG. ECO 9034
B
CHG R141 AND R143 VALUE. ECO 9377
CHG C13, C14, C25, R73, R77, R173 VALUE
C
ADD D15, D16, ECO 9457
C1
1
REVISIONS
EFF. DATE CHK
17 MAR 2009
31 JUL 2009
31 AUG 2009
29 JAN 2010CHG C52 TO Y1 TYPE. ECO 9591
INPUT BOARD
INPUT
INPUT_OUTPUT
MIX-OUT
MIX-OUT
or approximately 58 Vrms.
Troubleshoot notes: Rev A, (Revised date: July 22th, 2011)
A. General Notes.
a. AC voltage thresholds: operate at above 70 V and shutdown at below 50 V.
. Idle current: 120V and 230V @ 0.2A; short limit current: less than 1A per CH
b
c. Firmwares (FW): four revisions as follow:
1. FW Rev A - Initial release.
2. FW Rev B - Increased turn on mute time to avoid signal passing when the
system powers off with certain AC input situations.
3. FW Rev C - Increased the fan turn on voltage because some fans
wouldn't come on at the initial startup voltage.
4. FW Rev D - Adjusted fan thresholds to accommodate hardware changes
and modified limiters based on amplifier updates.
Notes:
FW Rev D IS NOT compatible with older amplifiers which have
FW Rev A-C and vise versa amplifier with FW Rev D cannot be
downgrade to earlier FW revisions (A-C).
d. K-Series power amplifier is class D, so passive low-pass filter (Audio
Precision AUX-0025) is required for all measurements - power, %THD, etc.
e. Circuitry revisions.
1. ECO# 9377, Rev B, Eff. date: Jul 2009:
- Change R141 and R143
2. ECO# 9457, Rev C, Eff. date: Aug 2009:
- Change C13, C14, C25, R73, R77, R173, & FW rev D. Add D15, D16.
Due to circuitry changes on both DSP and Power boards, new and old
revisions are incompatible and require correct firmware revision.
f. Service Bulletin:
1. Service bulletin #KSE0001revA, Issue date: Oct 2009,
Title: K Series inductor reinforcement. L13
g. Troubleshoot hints:
1. Power supply failures:
- No blown MOSFETs Q13 & Q14. Check for broken/cracked lead of
inductors L11, L12, L13.
- Blown MOSFETs Q13 & Q14. Always replace both MOSFETs and
diodes D33 & D34
2. Blown MOSFETS outputs of Amplification circuit:
- Always replace both MOSFETs on the defective channel. If the
amplifier still has problem, check its driver - U5 for Q2 & 3 and
U7 for Q4 & Q5.
MIX-OUT
B. Top Box Power Module with DSP feature disabled. To disable DSP, pull out the
GAIN B knob, use a install a shunt across pins 2 & 4 if header J7 has 10 pins (early
K Series production with PCB rev A & B, till Feb 2010) or across
if header J7 has 6 pins
a. Setup: * Apply a 10 mVrms, 1k Hz sinewave to only XLR input of MIC/LINE IN A;
set only GAIN A control fully up; set MIC/LINE switch to LINE.
* K & KW Output Adapter (SG-000576-TS): set the MODE switch to
BYPASS. Do not apply any load on the HF channel if the adapter
is not available to avoid overloading the HF channel.
b. Output measurements:
1. Output = 1.0 Vrms; LF output and HF output are 180 degree out of phase.
2. Turn the MIC/LINE switch to MIC position.
3. Verify an increase of 24.5 dB gain (16.75 Vrms).
4. Turn both gain controls down. Disconnect the signal from LINE IN A’s input
and feed the same signal onto either RCA input. Turn only GAIN B control
fully up and verify each output (should be 2 Vrms). Repeat this step to check
other RCA input.
5. Turn gain control B down. Disconnect input from RCA and then feed the signal
into LINE IN B’s XLR input. Change the input amplitude to 300mV. Turn
GAIN B control fully up. Verify output on each channel; should be 101 W
@8-ohm with <0.2% THD or 28.5 Vrms
6. Change the input amplitude to 560 mV. Verify output on each channel;
should be 358 W @8-ohm with <1.0% THD or 53 Vrms. Note: red LIMIT LED
turns on; it is normal.
C. Sub Box Power Module with DSP feature disabled. To disable DSP, pull
out the GAIN knob, locate W2 on the right side of the gain pot, and temporarily
short two pads of W2 together by soldering a piece of wire on them.
Apply a 600 mVrms, 1k Hz sinewave to only XLR input of MIC/LINE IN A;
a. Setup:
Turn GAIN control fully up.
b. Output measurements:
1. Output power in bridge (two channel outputs are combined) should be
425 W @8-ohm with <0.2% THD
3. Change the input amplitude to 800 mV. Verify output power; it
should be 760 W @8-ohm with <1.0% THD or approximately 78 Vrms.
1. THIS DRAWING USED IN CONJUCTION WITH ASSEMBLY WP-003311-00.
NOTES: UNLESS OTHERWISE SPECIFIED
pins 4 & 6
DSP
POWER_SUPPLY
D. Common parts:
a. K Sub
SP-000183-00 WOOFER,12",PAPER,,,FERRITE,
WP-003310-00 AMP ASSY, KSUB, UNIV SPLY, FULL RNG, PWRD
WP-003314-00 ENTIRE BOARD ASSY. (POWER SUPPLY BOARD)
WP-000334-TS PCB ASSY,INPUT,KSUB,,
b. K8
SP-000180-00 WOOFER, 8", PAPER, FERRITE
WP-003307-00 AMP ASSY,MAIN,K8,UNIVERSAL SUPPLY,
WP-003311-00 PCB ASSY,,K8,UNIVERSAL SUPPLY,
WP-000331-TS PCB ASSY,INPUT,K8,,
c. K10
SP-000181-00 WOOFER, 10", PAPER, FERRITE
WP-003308-00 AMP ASSY, 10", k10, UNIV SPLY, FULL RNG, PWRD
WP-003312-00 PCB ASSY,,K10,UNIVERSAL SUPPLY,
WP-000332-TS PCB ASSY,INPUT,K10,,
d. K12
SP-000182-00 WOOFER, 12", PAPER, FERRITE
WP-003309-00 AMP ASSY, k12, UNIV SPLY, FULL RNG, PWRD
WP-003313-00 PCB ASSY,,K12,UNIVERSAL SUPPLY,
WP 000333-TS PCB ASSY,INPUT,K12,,
e. Common Parts to all models
CO-000386-00 JACK,IEC,3 POS,FEMALE,LOCKING (all models)
SP-000184-00 COMPRESSION DRIVER,1.75",,,PETP,NEODYMIUM,
SR-000145-00 DIAPHRAGM, CELESTION T5510/R, 8 OHM
WC-000361-GP POWER CORD,IEC V-LOCK,18AWG, 3M,,NEMA 5-15,120V
WC-000362-GP POWER CORD,IEC V=LOCK,0.75MM, 3M,,CEE 7/7,230V
WP-000367-00 FAN ASSY,,BOP-2CH,, (all models)
IC-000382-30 DSP 28/56 BIT, , ADAU1701, , U10
IC-000413-30 DRIVER, IRS20957, SMT, U5, U7
QD-000284-00 MOSFET, 600V, 26A, 313W, STW26NM60, TO-247, Q14
QD-000312-GP LED, 3MM, BLUE SP, SLR343BB T 225419 ROHM, , ,
QD-000363-30 DIODE, 30V, 2.0A, , MBR230, SOD-123, D23, D24, D38, D39
QD-000372-00 BRIDGE RECTIFIER,KBU1005, IN-LINE, 600V 10A, BR1
QD-000373-00 MOSFET, 200V, 18A, 100W, IRFB4020, TO-220AB, Q2-Q5
QD-000376-00 MOSFET, 600V, 11A, 160W, STP11NM60FD, TO-220, Q13
QD-000391-00 DIODE, 600V, 8A, FFP08S60S, TO-220, 15NS, D33, D34
QD-000394-10 TRANSISTOR NPN,50V, 2A, 0.9W, 2SC2655, TO-92, Q16, Q7
XF-000376-00 INDUCTOR, CM, TOROID, 4MH, BOP, , 50/60HZ 6.3AL, 11, L12
XF-000377-00 INDUCTOR, 60HZ PFC, TOROID, 774UH, BOP, L13
BB2 FB2FB1
1
1
1
Board_Fiducial1Board_Fiducial
Badboard_Mark
BB1
1
1
1
Badboard_Mark
Board_Fiducial1Board_Fiducial
POWER_SUPPLY AMPDSP
MAIN BOARD
AMP
+VCC
-VCC
CONTRACT NO.
+12VLOW
+VCC
+12VLOW
+VCC
-VCC
PLUMBING SCHEDULE
----------------+/-15V: MAIN BOARD RAW
+/-15V_A: AMP CH 1 AUDIO
+/-15V_B: AMP CH 2 AUDIO
+/-15V_C: INPUT BOARD RAW
+/-15V_D: INPUT BOARD AUDIO
VDD1: MAIN BOARD +7V
VDD2: INPUT BOARD +7V
+/-VCC: AMPLIFIER RAILS
GROUND SCHEDULE
--------------C1: INPUT PCB CHASSIS
P1: MAIN PCB POWER
A1: MAIN PCB AUDIO
C2: XCAP CHASSIS
SCHEMATIC ASSOCIATION
--------------------PC-003311-00 FOR ALL MODELS
WP-003311-00 K8
WP-003312-00 K10
WP-003313-00 K12
WP-003314-00 KSUB
COMPONENT NOTES
--------------'2-WAY' MEANS ONLY FOR K8/10/12
'SUB' MEANS ONLY FOR KSUB
VALUE AS SHOWN AFTER NOTE
DNI MEANS 'DO NOT INSERT'
+12VLOW
AUDIO PRODUCTS, LLC.
COSTA MESA, CALIFORNIA
APPROVALS
1
1
FB4FB3
1
DRAWN
EVAN SHULTZ 29 OCT 2009
CHECKED
D. GALVAN
ISSUED
SEED FILE NO.
SUBVERSION AR-003311-00.ZIPNONE
DATE
29 JUL 2009
30 JUL 2009D. DELARM
PLOT DATE:
SIZE
C
SCALE
SCHEMATIC DIAGRAM
K SERIES 2-CH AMP
CAGE CODE
00PW4
DWG NO.
SH-003311-00
CAD FILE NO.
4
3
2
1
4
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
3
2
INPUT STAGE, SIGNAL PRESENCE, GAIN, INPUT SUMMING
1
LINE IN B
0.5V IN
J8 & J10: CO-000419-00
LINE IN A
0.5V IN
J9 & J11:CO-000421-00
2-WAY
J12
+6DB GAIN
J10
T
1
2
R
3
S
G
J11
MALE
1
2
3
G
SP3
2-WAY
L5
1K OHM
100MHZ
2-WAY
L6
1K OHM
100MHZ
L7
1K OHM
100MHZ
SP5 SP6SP2
L8
1K OHM
100MHZ
C1
L3
J8
T
1
2
R
3
S
G
J9
MALE
1
2
3
G
1K OHM
100MHZ
SP4
SW4: SW-000168-00
1K OHM
100MHZ
SP1
R104
20.0K
1 PCNT
1/10W
2-WAY
3PDT
456
LINE
MIC
SW4
1
2
3
L4
R105
20.0K
1 PCNT
C1
2-WAY
SW4
MIC
LINE
+3.3VD
789
3PDT
MIC LED
2-WAY
R108
475
1 PCNT
1/10W
2-WAY
LD3
YELLOW
MTG1 MTG2
C1
MTG3 MTG4
C1
SH3: B1
+15V_C
8
V+
U13
LM393A
V-
4
-15V_C -15V_C
C86
0.1UF
10 PCNT
25V
0.1UF
10 PCNT
25V
R102
21
1 PCNT
1/10W
R103
21
1 PCNT
1/10W
C91 C92C87
8
V+
U14
MC33078
V-
4
0.1UF
10 PCNT
25V
C82 C83C68
0.1UF
10 PCNT
25V
10UF
20 PCNT
25V
C1
C88
10UF
20 PCNT
25V
SH3: B2 & C3
2-WAY
R109
10.0K
1 PCNT
2-WAY
R110
10.0K
1 PCNT
1/10W
R111
20.0K
1 PCNT
1/10W
R112
20.0K
1 PCNT
1/10W
SUB: 0R
R106
1.13K
1 PCNT
1/10W
SUB: 0R
R107
1.13K
1 PCNT
1/10W1/10W
MC33078
V+
U17
V-
2
3
6
5
+15V_D
84
-15V_D
F3 = 72KHZ
C93
220PF
5 PCNT
50V1/10W
R113
10.0K
1 PCNT
1/10W
MC33078
U14
R114
10.0K
1 PCNT
1/10W
C94
220PF
5 PCNT
50V
C95
220PF
5 PCNT
50V
R115
10.0K
1 PCNT
1/10W
MC33078
U14
R116
10.0K
1 PCNT
1/10W
C96
220PF
5 PCNT
50V
0.1UF
10 PCNT
25V
0.1UF
10 PCNT
25V
INV
INV
+10DB AT TOP
0DB AT CENTER
-INF AT BOTTOM
CW
VR1
R117
2.21K
1 PCNT
1/10W
5K
G2
W
G1
CCW
C1
C97
0.25V0.25V
1
10UF
20 PCNT
16V
C1
SUB
R118
2.21K
1 PCNT
1/10W
2-WAY
VR2
5K
W
+15V_C
CW
G2
G1
CCW
C1
R120
14.0K
1 PCNT
1/10W
3
2
R121
2.87
1 PCNT
1/10W
2-WAY
C98
10UF
20 PCNT
16V
R119
2.21K
1 PCNT
1/10W
7
C1
R29
1.00K
1 PCNT
1/10W
C1
5
R167
1.00K
1 PCNT
1/10W
6
U13: IC-000505-30
UNITY GAIN AT 0DB GAIN POT
R130
14.0K
1 PCNT
1/10W
U17
2
3
SG3
C1
2-WAY
J13
MALE
1
G
MIX-OUT
1
MC33078
2
3
J13: CO-000421-00
VR1 & VR2: PT-250006-00
2-WAY
R122
LM393A
U13
LM393A
U13
1.0M
1 PCNT
1/10W
1
2-WAY
C99
0.1UF
10 PCNT
25V
-15V_C
SUB
R3
0
NA
NA
7
R123
1.0M
1 PCNT
1/10W
C100
0.1UF
10 PCNT
25V
C1
1.5V if one input of 0.5V applied
3V if two inputs of 0.5V applied
PRE-EMPHASIS: 10DB @ 5KHZ
2-WAY
R131
100
1 PCNT
1/10W
2-WAY
R132
100
1 PCNT
1/10W
2-WAY
2-WAY
R126
10.0K
1 PCNT
1/10W
2-WAY
MMST3906
Q9
SG4
R127
10.0K
1 PCNT
1/10W
MMST3906
Q10
LD6
GREEN
LD7
GREEN
2-WAY
C131
0.1UF
5 PCNT
100V
R13 R17
2.21K
1 PCNT
1/10W
SP10
SP9
C1
2.21K
1 PCNT
1/10W
R67
4.53K
1 PCNT
1/10W
U17
6
5
C1
MC33078
MIX-OUT
7
41 mV if inputs = 10 mV &
gain controls @ maximum
2.28V if one input of 0.5V applied
4.47V if two inputs of 0.5V applied
OUT
4
3
2
SIZE
CAGE CODE DWG NO. REV
00PW4
C
SCALE
CAD FILE NO.
SH-003311-00
AR-003311-00.ZIPNONE
1
4
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
Recommend a 10k pot for
Remote Gain or any pot
value within 2.5k to 50k.
= ((1.13k/2.21k) x 3.3) + 3.3
= 4.99V
3
2
DSP, EEPROM, 3.3V REGULATOR
1
TALL EURO HEADER:
PHOENIX CONTACT 1771965
A-MSTBVA 2,5/ 3-G-5,08-BK
+5V
J6: CO-000422-00
VOLUME:
4.75V = 0DB ATT
0.25V = AMP MUTE
LD1: QD-000054-00
J6
1
SP8
C1
J6
2
SP7
C1
J6
3
C1
MMST3904
FAN+
J5
J5
FAN-
C42
100UF
20 PCNT
SG2
SH5: D1
1K OHM
100MHZ
L10
1K OHM
100MHZ
25V
VDD2
L9
+3.3VD
Q6
+15V_C
C45
1000UF
20 PCNT
16V
10 PCNT
C1
1
2
FAN-GND
C1
0.1UF
U1
7
MC33078
R177
1.13K
R11
1 PCNT
100K
1/10W
1 PCNT
1/10W
R71
100K
1 PCNT
1/10W
C44
1.0UF
20 PCNT
16V
R68
475
1 PCNT
1/10W
LIMIT LED
LD1
RED
R69
10.0K
1 PCNT
1/10W
C1
2.21K
1 PCNT
1/10W
Q7
2SC2655
D45
IMBD4148
U8
NCP1117ST33
3 2
GND
C47
20 PCNT
25V
U8: IC-000420-30
+3.3VD
5
R6
6
2.21K
1 PCNT
1/10W
+15V_D
D17
3
BAT54S
2
-15V_D
C1
DP3POS
567
SW1
1
234
LF EQ
TOP:
FLAT 11
100HZ 10
DEEP 01
SUB:
FLAT 11
R70
DEEP 10
2P2T (SW-111)
SW1&2: SW-000112-00
SW3: SW-000111-00
Q7: QD-0000394-10
LD2: QD-000187-00
LD4: QD-000052-00
OUTIN
4
TAB
8
VCC
1
U11
C48
10UF
24C64A
VSS
25V
4
SH2: C1
IN
4.47v
C1
SH2: A3
U1
1
MC33078
DP3POS
567
8
SW2
234
1
FRONT LED:
ON 11
OFF 10
LIMIT 01
0.1UF
10 PCNT
25V
MIX-OUT
3.65K
1 PCNT
1/10W
8
VDD2
POWER LED
10UF
20 PCNT
25V
R9
R84
20.0K
1 PCNT
1/10W
C1
LD2
BLUE
IC1 & IC18: IC-000048-30
C54
4.47v
10UF
20 PCNT
16V
SUB: 0R
R74
10.0K
1 PCNT
1/10W
+3.3VD
= 60% of U1:1 Out
D4
BAT54S
R10
5.62K
1 PCNT
1/10W
C1
C1
C1
DPDT
456
SW3
1
2
3
HF EQ/POLARITY
TOP: VOCAL BOOST
SUB: POLARITY
+3.3VD
R7
1.00K
1 PCNT
1/10W
STANDBY LED
LD4
GREEN
D13
IMBD4148
10 PCNT
C67 C85C63
0.1UF
10UF
10 PCNT
20 PCNT
25V
25V
CM
0.0033UF
0.1UF
25V
6
5
C122
0.0033UF
10 PCNT
50V
C1
10 PCNT
C5
SUB: 0R
R154
10.0K
1 PCNT
1/10W
2-WAY
U18
MC33078
17.8K
1 PCNT
1/10W
+3.3VD
C50
50V
AMP-SD-DSP
Q17
MMST3904
0.1UF
10 PCNT
25V
R75
4.47v
R79
475
1 PCNT
1/10W
R160
1 PCNT
1 PCNT
1/10W
SUB: 100K
7
6.34K
1 PCNT
1/10W
20 PCNT
C1
TEMP-DSP
C55
0.068UF
10 PCNT
100V
3.65K
1/10W
0.1UF
10 PCNT
25V
21.75DB GAIN OVERLAP
R80
100K
+3.3VD
R81
FRONT-LED
C56
10UF
25V
TEST
12.288MHZ
C59 C61
18PF
5 PCNT
50V
C74C71C70
0.1UF
10 PCNT
25V
DSP GPIO (MP PINS)
------------------MP2-3,8-9 ARE AUX ADCS
ALL SWITCHES HAVE INTERNAL PULLUP
DNI
D18
BAT54S
C1
4
2
3
47
11
10
29
28
8
9
15
14
27
26
16
19
35
38
39
32
31
Y1
+3.3VD +1.8VD
IOVDD
AGND1
1
ADC0
ADC1
ADC_RES
FILTA
MP0
MP1
MP2
MP3
MP4
MP5
SDATA_OUT0
MP7
MP8
MP9
OUTPUT_LRCLK
OUTPUT_BLCK
PLL_LF
PLL_MODE0
PLL_MODE1
MCLKI
OSCO
R82
100
1 PCNT
1/10W
18PF
5 PCNT
50V
C1
PVDD
AVDD1
AGND3
AGND2
37
42 364812
1324183334
DVDD1
AVDD2
DGND1
PGND
+1.8VD
U10
VDRIVE
VOUT0
VOUT1
VOUT2
VOUT3
FILTD
ADDR0
ADDR1_CDATA_WB
CLATCH_WP
SDA_COUT
SCL_CCLK
SELFBOOT
RESET*
ADAU1701
IC10: IC-000382-30
U10
DVDD2
ADAU1701
DGND2
25
FIRMWARE ASSOCIATION
-------------------PG-000210-00 K8
PG-000211-00 K10
PG-000212-00 K12
PG-000213-00 KSUB
+3.3VD
Q8
MMST3906
17
46
45
44
43
41
40
CM
C62
100UF
20 PCNT
25V
7
20
WP
21
SDA
22
SCL
23
6
RST-L
5
30
RSVD
C1
10UF
20 PCNT
25V
3.3V: 92MA
1.8V: 60MA
R87
1.00K
1 PCNT
1/10W
CM
20 PCNT
C64
0.1UF
10 PCNT
25V
+3.3VD
SH2: A3
C84C81C65 C69
0.1UF
10 PCNT
25V
C66
10UF
25V
0.1UF
10 PCNT
25V
3RD ORDER, F3 = 30KHZ
R88
5.62K
1 PCNT
1/10W
R89
5.62K
1 PCNT
1/10W
R90
5.62K
1 PCNT
C1
1/10W
R91
5.62K
1 PCNT
1/10W
+15V_D
8
V+
U1 U18
MC33078
V-
4
-15V_D
R83
2.21K
1 PCNT 1 PCNT 1 PCNT
R92
5.62K
1 PCNT
1/10W
C72
680PF
5 PCNT
50V
R93
5.62K
1 PCNT
1/10W
R94
5.62K
1 PCNT
1/10W
C73
680PF
5 PCNT
50V
R95
5.62K
1 PCNT
1/10W
84
V+
MC33078
V-
R85 R86
2.21K
R96
20.0K
1 PCNT
C75
1/10W
100PF
5 PCNT
50V
3
2
C76
100PF
5 PCNT
50V
R97
20.0K
1 PCNT
1/10W
R98
20.0K
1 PCNT
C77
1/10W
100PF
5 PCNT
50V
5
6
C78
100PF
5 PCNT
50V
R99
20.0K
1 PCNT
1/10W
C41
8
0.1UF
V+
10 PCNT
25V
U19
MC33078
C120
0.1UF
V-
4
10 PCNT
25V
2.21K
1/10W1/10W1/10W
WP
7
WC*
SCL
6
SCL
SDA
5
SDA
24C64A
IC11: IC-000407-30
IC12: IC-000200-30
U19
MC33078
U19
MC33078
U11
E0
E1
E2
1
7
+3.3VD
VCC
GND
1
2
3
C1
C1
2
3
C1
2
RESET*
1
C1
C79
10UF
20 PCNT
16V
C80
10UF
20 PCNT
16V
U12
MAX809S
R100
100
1 PCNT
1/10W
R101
100
1 PCNT
1/10W
Sheet 2:A4
2-WAY
U18
1
MC33078
R28
RST-L
3
475
1 PCNT
1/10W
DNI
C40
100PF
5 PCNT
50V
C1
R173: RE-263401-30
OLD REV: 75K
TEMP-DSP
FRONT-LED
HI = LED ON
AMP-SD-DSP
LO = STANDBY
DNI
C43
100PF
5 PCNT
50V
C1
2 PIN JUMPER: CO-000081-00
PROGRAMMING HEADER
1
C1
2
3
R173
4
63.4K
1 PCNT
1/10W
5
6
VDD2
7
8
C1
9
-15V_C
+15V_C
10
J2A: WC-000398-00
J7
1
SCL
J7
2
RST-L
J7
3
SDA
J7
4
C1
J7
5
WP
J7
6
TEST
WIRE GUIDE:
MOLEX 51016-1000
J2A
AGND
J2A
CH1
J2A
CH2
J2A
TEMP
J2A
FRONT LED
J2A
AMP-SD
J2A
+7V
J2A
PGND
J2A
-15V
J2A
+15V
W2
C1
2.5vdc
4
3
2
SIZE
CAGE CODE DWG NO. REV
00PW4
C
SCALE
CAD FILE NO.
SH-003311-00
AR-003311-00.ZIPNONE
1
4
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
3
2
2-CHANNEL CLASS D AMPLIFIER AND PROTECTION
1
AGND
CH1
CH2
TEMP
FRONT LED
AMP-SD
+7V
PGND
-15V
+15V
+15V_A
WIRE TRAP:
MOLEX 52004-1010
J2B
1
J2B
2
J2B
3
J2B
TEMP-MAIN
4
J2B
5
HI = LED ON
J2B
6
LO = STANDBY
VDD1
J2B
7
J2B
8
-15V
J2B
9
+15V
J2B
10
LM19: TEMP - VOUT
0C - 1.8V
25C - 1.570V
45C - 1.327V
55C - 1.218V
75C - 0.997V
85C - 0.878V
95C - 0.772V
R78
3.65K
R163 C39
1 PCNT
1.13K
1/10W
1 PCNT
1/10W
A1
P1
0.1UF
10 PCNT
25V
+15V
R14
10.0K
1 PCNT
1/10W
IMBD4148
IMBD4148
C12
0.1UF
10 PCNT
25V
P1
IC9: IC-000315-00
U9
1 2
TEMP-MAIN
VO
V+
GND
LM19CIZ
3
R4
10.0K
1 PCNT
1/10W
D1
D2
A1
CH2-SD
CH1-SD
C3
0.1UF
10 PCNT
25V
VDD1
R5
4.53K
1 PCNT
1/10W
J3
9
FRONT LED
J3
10
Q1
MMST3904
P1
IC2&U4: IC-000279-30
10
9
10
9
A1
R22
10.0K
1 PCNT
1/4W
R20
1.00K
1 PCNT
1/10W
A1
R19
10.0K
1 PCNT
1/4W
1.00K 1.00K
1 PCNT
1/10W
A1
U2
7
LM319
8
U4
7
LM319
8
C9
120PF
5 PCNT
200V
R25
1.13K
1 PCNT
1/10W
R24
1.00K
1 PCNT
1/10W
C7
0.0039UF
5 PCNT
50V
C8
120PF
5 PCNT
200V
R23
1.13K
1 PCNT
1/10W
R21R18
1 PCNT
1/10W
C6
0.0039UF
5 PCNT
50V
+15V
-15V
A1
A1
R38
21
1 PCNT
1/10W
R39
21
1 PCNT
1/10W
C51
220PF
5 PCNT
50V
A1A1P1
C49
220PF
5 PCNT
50V
A1
C58
120PF
5 PCNT
200V
C60
120PF
5 PCNT
200V
D15&16: QD-000102-30
R77&R73: RE-111301-30
C13&C14: CA-610021-30
U5&U7: IC-000413-30
R180
+15V_B
243
1 PCNT
P1
5
4
A1
5
4
A1
C15
10UF
20 PCNT
25V
C16
10UF
20 PCNT
25V
R125
10
1 PCNT
1/10W
R72
10
1 PCNT
1/10W
SN1
1 PCNT
SN2
1/10W
R181
243
1/10W
R30
1.13K
1 PCNT
1/10W
R176
17.8K
1 PCNT
1/10W
U4
12
6.34K
1 PCNT
1/10W
A1
R32
3
LM319
R178
2.21K
1 PCNT
1/10W
R33
1 PCNT
1/10W
+15V_A
R31
1.13K
1 PCNT
1/10W
R124
17.8K
1 PCNT
1/10W
U2
12
LM319
3
R179
2.21K
1 PCNT
1/10W
116
V+
U2 U4
LM319
V-
A1
R34
6.34K
1 PCNT
1/10W
R35
2.21K
1 PCNT
1/10W
+15V_A +15V_B
C26
0.1UF
10 PCNT
25V
C121 C138
0.1UF
10 PCNT
25V
D15
IMBD4148
1.13K
1 PCNT
1/10W
CH2-SD
C10
10PF
5 PCNT
50V
1 PCNT
D16
IMBD4148
1.13K
1 PCNT
1/10W
CH1-SD
C11
10PF
5 PCNT
50V
1 PCNT
R1
21
1 PCNT
1/10W
R2
21
1 PCNT
1/10W
HF AMP IN 2-WAY
R77
4.53K2.21K
1/10W
R36
C13
10UF
20 PCNT
25V
A1
U5
1
VDD
2
CSD
IN
VSS
6
VREF
OCSET
8
IRS20957
R40
14.0K
1 PCNT
1/10W
LF AMP IN 2-WAY
R73
4.53K
1/10W
R37
1
2
6
8
VDD
CSD
IN
VSS
VREF
OCSET
IRS20957
C37
10UF
20 PCNT
25V
C103
10UF
20 PCNT
25V
C14
10UF
20 PCNT
25V
A1
U7
R41
14.0K
1 PCNT
1/10W
OLD REVISION:
D15&16: NOT EXISTED
R77&R73: 3.65K
C13&C14: 0.1 UF, 25V
R42
5.62K
1 PCNT
1/10W
16
CSH
15
VB
143
HO
134
VS
11
VCC
107
LO
9
COMDT
C17
10UF
20 PCNT
25V
R43
5.62K
1 PCNT
1/10W
16
CSH
15
VB
143
HO
134
VS
11
VCC
107
LO
9
COMDT
C18
10UF
20 PCNT
25V
C27
116
0.1UF
V+
10 PCNT
25V
LM319
0.1UF
V-
10 PCNT
25V
-15V_B-15V_A
R49
2.87
1 PCNT
1/10W
R51
2.87
1 PCNT
1/10W
IN
IN
R46
10.0K
1 PCNT
1/10W
D9
BAS21
R47
10.0K
1 PCNT
1/10W
D10
BAS21
D11
BAS21
D12
BAS21
+VCC
-VCC
R44
3.65K
1 PCNT
1/10W
C23
10UF
20 PCNT
25V
D5
ES1D
Q2-Q5: QD-000373-00
U5&U7: IC-000413-30
R45
3.65K
1 PCNT
1/10W
C24
10UF
20 PCNT
25V
D6
ES1D
R48
150K
1 PCNT
R52
21
1 PCNT
1/10W
R12
+12VLOW
21
1 PCNT
1/10W
R53
21
1 PCNT
1/10W
R50
150K
1 PCNT 1 PCNT
1/8W
R54
21
1 PCNT
1/10W
R15
+12VLOW
21
1 PCNT
1/10W
R55
21
1 PCNT
1/10W
C32
0.047UF
10 PCNT
250V
R16 R56
1.5
5 PCNT
1W
R26
150K
1 PCNT
1/8W1/8W
IN
R27
150K
1/8W
IN
C36
0.047UF
10 PCNT
250V
1.5
5 PCNT
1W
+VCC
IRFB4020
IRFB4020
-VCC
+VCC
IRFB4020
IRFB4020
-VCC
P1
STATIC CHECK MOSFETS Q2 & Q3
IN CIRCUIT:
- Q2: GS = 3M (0.6V/1.7V);
GD = 3M (>3V/1.80V);
DS = >36K (0.5V/>3V)
- Q3: GS = 3M (0.6V/1.7V);
R60
GD = 3M (>3V/1.80V);
19.6
Q2
Q3
C28
120PF
5 PCNT
200V
R61
19.6
1 PCNT
1/8W
C29
120PF
5 PCNT
200V
T94-2 60T 21AWG
L1
30UH
C34
0.68UF
5 PCNT
100V
C109
0.1UF
5 PCNT
100V
R182
10
1 PCNT
1/8W
R169
10
1 PCNT
1/8W
DS = >36K (0.5V/>3V)
1 PCNT
1/8W
0.022UF
10 PCNT
R197
10
1 PCNT
1/8W
R198
10
1 PCNT
1/8W
SUB
C123
500V
3
-VCC
P1
SYNC CAP
C2
0.047UF
10 PCNT
30UH
250V
L2
R183
R199
10
10
P1
C35
0.68UF
5 PCNT
100V
1 PCNT
1 PCNT
1/8W
1/8W
R196 R200
10
10
1 PCNT1 PCNT
1/8W
1/8W
C119
0.1UF
5 PCNT
100V
8
C57
0.022UF
10 PCNT
500V
7
J3
J3
SH5: C1
R62
19.6
1 PCNT
1/8W
Q4
Q5
D3
ES1D
D8
ES1D
C30
120PF
5 PCNT
200V
R63
19.6
1 PCNT
1/8W
C31
120PF
5 PCNT
200V
C4: CA-468006-00
C53: CA-322013-30
J3
R159: RE-030002-10
R156: RE-282501-30
HF PAD
PREP R159 OFF BOARD
2-WAY
0.68UF
5 PCNT
250V
2-WAY
R159
5 PCNT
2-WAY
R156
82.5K
1 PCNT
1/8W
C4
300
2W
2
2-WAY
C53
0.022UF
10 PCNT
500V
1
J3
J3
J3: CO-000413-00
CH1 OUT+
CH1 OUT-
CH2 OUT+
CH2 OUT-
4
3
2
SIZE
CAGE CODE DWG NO. REV
00PW4
C
SCALE
CAD FILE NO.
SH-003311-00
AR-003311-00.ZIPNONE
1
4
THIS DOCUMENT CONTAINS PROPRIETARY
INFORMATION WHICH IS THE PROPERTY
OF QSC AUDIO PRODUCTS, THAT MAY NOT
BE DISCLOSED, REPRODUCED OR USED
WITHOUT EXPRESS WRITTEN CONSENT FROM
QSC AUDIO PRODUCTS.
QSC AUDIO PRODUCTS.
QSC AUDIO PRODUCTS.
QSC AUDIO PRODUCTS.
QSC AUDIO PRODUCTS.
3
UNIVERSAL INPUT POWER SUPPLY
2
1
RAB
RAB
APPROVED/DATE
DD
DD
D
D
D
D
D
C
C
C
C
C
F1: MS-10.250-FU
J14
10A
250V
0.68UF
10 PCNT
250VAC
J15
REGULATED, FIXED FREQUENCY 200K HZ,
D
D
D
D
ACTIVE CLAMP FLY-BACK POWER SUPPLY
D
SH4: C4 &
SH4: B3 & C4
D38
MBR230
P1
D39
MBR230
+85V
+VCC
R170
56K
5 PCNT
1W
R171
1.13K
1 PCNT
1/10W
-VCC
-85V
F4
24V
1.0A
R8
6.34K
1 PCNT
1/10W
OUT
R76
3.65K
1 PCNT
1/10W
R66
3.65K
1 PCNT
1/10W
C149
0.68UF
5 PCNT
250V
0.1UF
10 PCNT
C33
25V
D37
BAT54S
R58
100
1 PCNT
1/10W
D36
ES1D
P1
1
Q15: QD-000105-30
U6: IC-000157-30
F2, F3, F4: MS-000115-30
F2
D31
F3
R161
100
5 PCNT
2W
C126
100PF
5 PCNT
500V
C127
100PF
5 PCNT
500V
R162
100
5 PCNT
2W
ES1D
R59
100
1 PCNT 5 PCNT
1/10W
R64
100
1 PCNT
1/10W
D32
ES1D
FFP08S60S
20 PCNT
20 PCNT
W1
FFP08S60S
5 PCNT
D33
C135
1800UF
100V
P1
C136
1800UF
100V
D34
C19
120PF
200V
C20
120PF
200V
24V
8
1.0A
S8
T2
S9
R166
100
5 PCNT
2W
9
S11
11
24V
1.0A
7
S7
T2
S10
10
S12
12
T106-26B 79T 18AWG
L13
774UH
F1
L11
R133
243K
1 PCNT
1/8W
R134
243K
1 PCNT
1/8W
A2A1
B1 B2
4MH
0.5*960UF*375V^2 = 67.5J
C102C101
0.68UF
10 PCNT
250VAC
C104
0.0022UF
20 PCNT
125VAC
MTG9
C2
C105
0.0022UF
20 PCNT
125VAC
R140
NTC
2.5 OHMS
L12
B1 B2
4MH
A2A1
1
2
C108
0.1UF
20 PCNT
250VAC
R139
1 PCNT
1/10W
C111
0.022UF
10 PCNT
500V
5
6
100
BR1
KBU1005
AC1
-
AC2
R185
243
1 PCNT
1/10W
C130
20 PCNT
0.022UF
10 PCNT
500V
PRI_LO
STATIC CHECK MOSFETS Q13 & Q14 IN CIRCUIT:
- Q13: GS = 1.3K (0.48V);
GD = 1M/33K (OL/0.9V); DS = 1M (0.5V/OL)
- Q14: GS = 1K/12K (0.124V/2V);
C132
GD = >2OK (>2V); DS = >1M (0.5V/OL)
0.022UF
10 PCNT
500V
+
C112
470UF
400V
C113
470UF
20 PCNT
400V
C114
0.022UF
10 PCNT
500V
R186
243
1 PCNT
1/10W
BR1: QD-000372-00
Q13: QD-000376-00
Q14: QD-000284-00
PRI_HI
R144
R152
82.5K
11K
1 PCNT
5 PCNT
1/8W
1W
R145
R172
82.5K
11K
1 PCNT
5 PCNT
1/8W
1W
R188
R146
82.5K
11K
5 PCNT
1 PCNT
1/8W
1W
R189
R147
11K82.5K
1 PCNT
5 PCNT
1W
1/8W
QCL-DR
QM-DR
EE42 3C90
100X40AWG LITZ PRI
100X40AWG LITZ SEC
22AWG AUX
PSU-VSW
4
B2
T1
B1
3
R150
29.4K
1 PCNT
1/10W
C116
0.68UF
5 PCNT
250V
Q13
STP11NM60FD
Q14
STW26NM60
C124
0.0022UF
20 PCNT
125VAC
T2
C52
220PF
10 PCNT
250VAC
3
P3
P1
1
C133
100UF
20 PCNT
25V
C134
100UF
20 PCNT
25V
R174
1.5
5 PCNT
1W
C46
0.047UF
10 PCNT
250V
C89
0.047UF
10 PCNT
250V
R184
1.5
5 PCNT
1W
+15V
-15V
regulated
regulated
VDD1
D28
ES1D
C1
120PF
5 PCNT
200V
Q16: QD-000394-10
D14&D29: QD-000108-30
P1
Q16
2SC2655
C125
0.68UF
5 PCNT
100V
U3
MOC205R2V-M
R65
11K
5 PCNT
1W
Q15
MMBTA42
R175
100
1 PCNT
1/10W
3 12
U6
ZR431
2
OUT
+7V
C129
100UF
20 PCNT
25V
P1
+12VLOW
D29
BAS21
D14
BAS21
-VCC
SH3: B4
SH4: B2 & C2
OUT
C25
C25: CA-810009-01
1000UF
20 PCNT
OLD REV: 100 UF, 16V
16V
C
C
C
C
C
B
B
B
B
B
A
A
A
A
A
R135
150K
1 PCNT
1/8W
R136
150K
1 PCNT
1/8W
C106
0.1UF
10 PCNT
25V
R137
17.8K
1 PCNT
1/10W
IMBD4148
AC DETECTOR
ON ABOUT 24VAC
OFF IN 30MS
D22
0.1UF
10 PCNT
25V
R138
100K
1 PCNT
1/10W
Q11
MMST3904
C110C107
10UF
20 PCNT
PSU-BIAS
25V
Q12
MMST3904
TESTING MOSFET IN CIRCUIT
* With DIODE-CHECK
Reference
Q13
Q14
G --> S G --> D D --> S S --> D
0.45V OL 0.42V OL
0.125V
** With RESISTANCE-CHECK
Reference
Q13
Q14
G --> S G --> D D --> S S --> D
1.13k > 1M > 1M > 1M
> 900
LINEUV = 1.27V
C38
1.0UF
20 PCNT
16V
R142
100K
1 PCNT
1/10W
R141
7.87K
1 PCNT
1/10W
R141: RE-178701-30
R143: RE-263401-30
OLD REVISIONS
R141: 3.65K; R143: 75K
> 2V
> 1M
R148
6.34K
1 PCNT
1/10W
R143
63.4K
1 PCNT
1/10W
R149
63.4K
1 PCNT
1/10W
U15
16
VIN
15 13
LINEUV
1
RTDEL
2
RTON
VREF
3
RTOFF
8
RSLOPE
10
SS_SD
5
SYNC
UCC2893
C115
1.0UF
20 PCNT
16V
PRI_LO
U15: IC-000412-30
0.50V > 2V
> 1M > 1M
OC = 26.1A = 0.75V
C117
220PF
5 PCNT
7
CS
OUT
12
AUX
4
2.21K
9
1 PCNT
FB
1/10W
6
7
U3
MOC205R2V-M
5
50V
R151
10 PCNT
C21
0.1UF
PRI_LO
10 PCNT
25V
R153
768
1 PCNT
1/10W
C118
0.1UF
D25
IMBD4148
2.87
1 PCNT
1/10W
D27
BAS21
R157
10
1 PCNT
25V
1/8W
R168
1 PCNT
1/8W
D24
MBR230
10
R158R155
1.00K
1 PCNT
1/10W
QM-DR
2
A2
T1: XF-000360-30
T1
T2: XF-000362-00
A1
1
T3: XF-000361-30
C128 C137
R57
21
1.0UF
1 PCNT
20 PCNT
1/10W 16V
D23
MBR230
1
T3 T3
3
4
20 PCNT
6
IMBD4148
PSU-VSW
1.0UF
16V
D35
D40
BAS21
R165
1 PCNT
1/10W
R164
1.13K
1 PCNT
1/10W
SG1
QCL-DR
10
C22
120PF
5 PCNT
200V
5
B5
T2
B6
6
UCC2893 RUN CURRENT = 3MA MAX
R187
GATE DRIVE CURRENT:
(102NC + 40NC) * 200K = 29MA
100
TOTAL OPERATING CURRENT = 32MA
1 PCNT
1/10W
U16
D43
8 1
ES1D
C90
0.1UF
10 PCNT
25V
T2: XF-000362-00
U16: IC-000431-30
U15: IC-000412-30
236
A1
LM78L12A
VOUTVIN
7
MTG5 MTG7
P1
MTG6 MTG8
D7
IMBD4148
C145
1000UF
20 PCNT
SIZE
C
SCALE
PSU-BIAS
C148
VDD
1.0UF
U15
20 PCNT
16V
UCC2893
16V
CAGE CODE DWG NO. REV
00PW4
GNDPGND
6
11 14
SH-003311-00
CAD FILE NO.
AR-003311-00.ZIPNONE
SHEET 1 OF
SHEET
SHEET
SHEET
SHEET
2 OF 5
3 OF 5
4 OF 5
5 OF 5
REV
C1
C1
C1
C1
C1
5
B
B
B
B
B
A
A
A
A
A
4
3
2
1
ACTIVE-CLAMP FLYBACK SUPPLY
INPUTS & SIGNAL PROCESSING
XF-000391-00
PFC-IMPROVING
INDUCTOR
XF-000376-00
RE-000300-NR
MAIN DC VOLTAGE
RECTIFIER & FILTER CAPACITORS
140VDC@100VAC or 340VDC@230VAC
POWER SUPPLY CONTROL CIRCUIT
START-UP - PROVIDING CURRENT
FOR CHARGING C145 THROUGH U15
UNDERVOLTAGE
AC DETECTOR
MAIN +/-85V RAIL
REGULATION (U3, U6, Q15)
PWM (U15, U3, T1, T3)
CH2 ZOBEL
NETWORK
CH2 HF 1ST.
ORDER FILTER
CH1 ZOBEL
NETWORK
FRONT
LED
EEPROM
CLOCK
GAIN A
2-WAY
DSP
+1.8VD
+3.3VD
SIG. PRE. LED
INPUT A, 2-WAY
MIC/LINE SW
2-WAY
MIC LED, 2-WAY
LINE IN B
J8, J9,
U14:B
2-WAY:
LF SW
EXT SUB/NORM/DEEP
SUB: MODE SW
NORMAL/DEEP
2-WAY: HF SW
VOCAL BOOST/FLAT
SUB: POLARITY SW
NORMAL/REVERSE
STATUS INDICATORS
RED: LIMIT
GREEM: STBY
BLUE: POWER
XF-000376-00
blue
100 - 260vac
brown
MS-10.250-FU
AC LINE FILTER
HI-CUR. SWITCHING
Q13, Q14, XF-SEC
+/-VCC (+/-85V)
SF-PRI, RECTIFIERS, FILTER
CAPACITORS, AND C124+C52
+R166 (REDUCE SECONDARY
GROUND RIPPLE, EFFECTIVELY
INCREASE SNR)
SELF-OSCILLATING CLASS-D AMPLIFIER
VDD (+12V PSU-BIAS)
-15V SUPPLY
+15V SUPPLY
+12VLOW SUPPLY
VDD1 (+7V SUPPLY)
HOUSEKEEPING VOLTAGES
CH2: GATE DRIVE U5,
HI-CUR. SWITCHING Q2 & Q3,
OUTPUT FILTER NETWORK L1 & C34
CH2 PWM
U4, F(IDLING) = 400k Hz
CH1 PWM
U2, F(IDLING) = 400k Hz
FAN SPEED
CONTROLLER
TEMP-TO-VOLT
SENSOR U9
CH1: GATE DRIVE U7,
HI-CUR. SWITCHING Q4 & Q5,
OUTPUT FILTER NETWORK L2 & C35
GAIN B
+/-15V_D
LINE OUTS
(POST DSP)
U19:A = CH1
U19:B = CH2
J5 PINOUTS
1: 2: FAN+; FAN-
SIGNAL
PRESENCE
LED - INPUT B
J2A&J2B PINOUTS
1: AGND; 2: CH1; 3: CH2; 4: TEMP; 5: FRONT LED
6: AMP-SD; 7: +7V; 8: PGND; 9: -15V; 10: +15V
PC-003311-00 K-SERIES BOARD - TOP SIDE - REV. D
LINE IN B
J10, J11,
J12, U14:A
LINE OUT (U17:A)
(POST GAIN - MIX)
PRE-EMPHASIS (U17:B):
10dB @ 5K HZ
FRONT LED
SW
REMOTE
GAIN
J6 PINOUTS
1: +5V; 2: VOL; 3: GND
DATE: JULY 22th, 2010
REV.: B
SHEET 1 OF 3
J3 PINOUTS (2-WAY)
1: CH2 OUT- (YEL); 2: CH2 OUT+ (YEL/BLK)
7: CH1 OUT- (GRN); 8: CH1 OUT+ (GRN/BLK)
9: LED+ (WHT); 10: LED- (BLK)
3, 4, 5, 6: N/C
J3 PINOUTS (SUB)
1: CH2 OUT- (YEL); 3: CH2 OUT+ (YEL/BLK)
7: CH1 OUT- (GRN); 8: CH1 OUT+ (GRN/BLK)
9: LED+ (WHT); 10: LED- (BLK)
2, 4, 5, 6: N/C
PSU SWITCHING
Q14: MAIN SWITCHING FET
Q5 ACTIVE CLAMP FET
CH2 SWITCHING
Q2: POSITIVE; Q3 NEGATIVE
TEMP-TO-VOLT SENSOR
RECTIFIER DIODES
D33: POSITIVE; D34 NEGATIVE
U9: PIN1 = V+, PIN2 = VO; PIN3 = GND
CH1 SWITCHING
Q4: POSITIVE; Q5 NEGATIVE
PC-003311-00 K-SERIES BOARD - BOTTOM SIDE - REV. D
DATE: JULY 22th, 2011
REV.: B
SHEET 2 OF 3
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