EN-33
ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No.
DESCRIPTION OF CHANGE
L292 CT1 Top Level.SchDoc
AMP024 Top Level
Contact Engineer:
L292CT
06/01/2020
INITIALS
Printed:
1
7
Sheet
of
Notes:
Contact Tel:
01223 203201
Jon Henderson
A & R Cambridge Ltd.
Cambridge CB25 9QE
Waterbeach
A3
ARCAM
TO XLR/PREAMP PCB
FROM LIFTER PCB
FROM LIFTER PCB
+VLIFT
-VLIFT
1
2
3
4
5
6
7
8
44472
CON4
MOLEX
-VLIFT
+VLIFT
P18
P17
STARGND DEC
DGND
+L INPUT
-L INPUT
+R INPUT
-R INPUT
AGND
GND R
GND L
SP1
+14V
AGND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
52806
CON1
MOLEX
-14V
1
2
3
VH
CON5
JST
NLD
PLD
NLD
PLD
+14V
-14V
GND L
GND R
SPEAKER LEFT
SPEAKER RIGHT
GND L
GND R
G2R-1-E-24VDC
RLY1A
Omron
G2R-1-E-24VDC
RLY2A
Omron
2W
R3
4R7
2W
R11
4R7
P5
P2
P8
P11
100V
C1
100N
100V
C2
100N
100V
C4
100N
100V
C5
100N
2W
R2
4R7
2W
R10
4R7
NF
NF
D1
BAS16
SPK ON
0W063
R15
10K
G2R-1-E-24VDC
RLY1B
Omron
G2R-1-E-24VDC
RLY2B
Omron
0W063
R14
1K0
TR1
MMBTA06L
P
14
P13
DGND
DGND
+30V
+L Input
-L Input
DRIVE L-
NLD
OUT L+
OUT L-
OUT L
PLD
DRIVE L+
FEEDBACK L
MUTE
SPK ON
Pre Drive Left
L292 CT2 L Channel.SchDoc
OUT L
DRIVE L+
SHORT L3
SHORT L2
OUT L-
SHORT L1
DRIVE L-
OUT L+
BIAS L1-
BIAS L2-
BIAS L3+
BIAS L2+
BIAS L3-
BIAS L1+
Arc Welder Left
L292 CT3 L Channel Output.SchDoc
-R Input
DRIVE R+
DRIVE R-
OUT R-
PLD
+R Input
OUT R+
NLD
OUT R
FEEDBACK R
MUTE
Pre Drive Right
L292 CT4 R Channel.SchDoc
SHORT R3
DRIVE R+
OUT R+
OUT R
DRIVE R-
SHORT R1
SHORT R2
OUT R-
BIAS R1+
BIAS R3+
BIAS R2+
BIAS R3-
BIAS R2-
BIAS R1-
Arc Welder Right
L292 CT5 R Channel Output.SchDoc
+L INPUT
-L INPUT
+R INPUT
-R INPUT
OUT L
OUT R
OUT L
OUT R
OUT L
OUT R
PA SHORT*
DC OFFSET
DGND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
52806
CON2
MOLEX
LIFT TEMP T2
LIFT TEMP T1/AC FAIL*
MCU BIAS1
MCU BIAS2
MCU BIAS3
BIAS CH SEL
SPK ON
+3V3
OUT L
SHORT L3
SHORT R2
SHORT L2
SHORT R3
PA SHORT*
SHORT R1
DC OFFSET
OUT R
SHORT L1
Protection
L292 CT6 Protection.SchDoc
BIAS R3+
MCU BIAS2
MCU BIAS1
BIAS R3-
BIAS R2-
BIAS R2+
BIAS R1-
BIAS R1+
BIAS L3-
BIAS L3+
BIAS L2-
BIAS L2+
BIAS L1-
BIAS L1+
MCU BIAS3
BIAS CH SEL
Bias Monitor
L292 CT7 Bias Circuit.SchDoc
MCU BIAS1
MCU BIAS2
MCU BIAS3
BIAS CH SEL
OUT R
OUT L
PA SHORT*
DC OFFSET
SHORT L1
SHORT L2
SHORT L3
SHORT L1
SHORT L2
SHORT L3
SHORT R1
SHORT R2
SHORT R3
SHORT R1
SHORT R2
SHORT R3
FEEDBACK L
FEEDBACK R
FEEDBACK R
FEEDBACK L
0W25
R8
47K
NF
0W25
R9
47K
NF
+30V
+65V
-30V
-65V
NLD
PLD
STARGND DEC
LIFT TEMP T2
LIFT TEMP T1/AC FAIL*
STARGND DEC
STARGND DEC
STARGND DEC
STARGND DEC
STARGND DEC
1
2
3
4
5
6
7
8
XH (VERTICAL)
CON3
JST
1
2
3
4
5
6
XH (VERTICAL)
CON8
JST
P75
P76
P64
P66
P62
P61
AGND
1 2 3 4 5 6 7
VH
CON6
JST
1 2 3 4 5 6 7
VH
CON7
JST
GND A
GND B
GND C
AGND
P1
P3
P4
P6
P7
P20
P16
P19
P9
P15
P10
SPK ON
0W5
R13
130R
L292PB
Blank PCB L292PB AMP024 AMP PCB
PCB1
1
FD1
FD2
19_E007
JH
05/02/2019
G.0
CON2 pinout corrected, CON5 made NF
NF
1
2
M20-973
CON9
HARWIN
GND A
GND A
19_E027
PK
17/05/19
1.0
None to this sheet
19_E035
PK
08/11/19
1.1
None to this sheet
19_E040
PK
03/12/19
2.0
PCB change only
20_E002
PK
06/01/20
3.0
PCB change only
Summary of Contents for PA240
Page 1: ...SERVICE MANUAL POWER AMPLIFIER PA240 ISSUE A ...
Page 2: ...EN 2 Revision History Issue A Initial release ...
Page 14: ...EN 14 EN 14 L288 Pre Amplifier PCB Issue 3 ...
Page 24: ...EN 24 EN 24 L292 Power Amplifier PCB Issue 3 ...
Page 40: ...EN 40 EN 40 L283 PSU PCB Issue 1 ...
Page 44: ...EN 44 L308 Lifter PCB Issue 1 ...
Page 49: ...EN 49 L285 Front Panel PCB Issue 1 ...
Page 52: ...EN 52 Overall Dimensions ...
Page 54: ...EN 54 Exploded Drawings ...