EN-20
ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No. DESCRIPTION OF CHANGE
L288 CT1 Top Level.SchDoc
AMP024 Top Level
Contact Engineer:
L288CT
16/12/2020
INITIALS
Printed:
1 4Sheet of
Notes:
Contact Tel: (01223) 203207Peter Kuell
A & R Cambridge Ltd.
Pembroke Avenue
Cambridge CB25 9QR
Waterbeach
A3
ARCAM
PA L +
PA L -
BRIDGED
PA R +
PA R -
IP DET*
MONO
RCA/XLR*
DANTE 2+
DANTE 1+
DANTE 2-
DANTE/XLR*
DANTE 1-
GAIN 25 RCA
GAIN 25 XLR
Inputs
L288 CT2 Input.SchDoc
RX D0
RS232 TX
TX EN
RX D1
RX ER
MDIO
RS232 RX
CRS DV
REF CLK
TX D0
TX D1
VBUS EN
NET INT
MDC
USB_P
USB_N
NET PSU EN
Network
L288 CT3 Net.SchDoc
TX D0
DC OFFSET
PA TEMPL
TX D1
TX EN
REF CLK
SS BYP
CRS DV
LIFT TEMP T2
RX D0
RS232 RX
VBUS EN
RS232 TX
PA TEMPR
RX D1
MDIO
PA SHORT*
NET INT
SS EN
RX ER
BRIDGED
IP DET*
GREEN LED
BIAS SEL
MCU BIAS 3
MCU BIAS 2
MCU BIAS 1
RED LED
MDC
MONO
DANTE EN
DANTE RESET*
DANTE PRES*
RCA/XLR*
SPK MUTE
DANTE/XLR*
GAIN 25 XLR
GAIN 25 RCA
STBY KEY*
MUTE KEY*
USB_P
USB_N
NET PSU EN
DANTE TX
DANTE RX
LIFT TEMP T1/AC FAIL*
WHITE LED
DANTE/PIC* RS232
MCU
L288 CT4 Micro.SchDoc
RED LED
DGND
+5V STBY
+3V3 STBY
DGND
SS BYP
SS EN
1
2
3
4
5
6
PH
CON4
JST
PA TEMP L
PA TEMP R
GREEN LED
WHITE LED
50V
NPO
C1
22P
50V
NPO
C2
22P
50V
NPO
C3
22P
DGND
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 MUTE
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
-14V
+3V3 STBY
+5V STBY
Blank L288PB AMP024 Input PCBL288PBPCB1 1
DANTE RESET*
DANTE EN
DANTE/PIC* RS232
DANTE TX
DANTE RX
DANTE PRES*
DANTE 1+
DANTE 1-
DANTE 2+
DANTE 2-
1
2
3
4
5
6
7
8
52808
CON3
MOLEX
FD1 FD2
TOOL1 TOOL2 TOOL3 TOOL4
1
FIX3
Dia 3.2mm
0W063
R3
0R0
1
FIX4
Dia 3.2mm
0W063
R4
0R0
NF
1
FIX5
Dia 3.2mm
0W063
R5
0R0
NF
DGND AGNDAGND
0W125
R1
0R0
+3V3 STBY +3V3 MCU
+14V
-14V
35V
C6
47UF
35V
C7
47UF
AGND
50V
C8
1N0
DGND AGND
NF
50V
C9
1N0
50V
C10
1N0
50V
C11
1N0
NF
NF
NF
MUTE KEY*
STBY KEY*
P16
P17
P3
P5
P6
P8
P10
P12
P25
P26
PA R +
PA R -
PA L +
PA L -
P19
P21
P22
P1
P2
P4
P7
P9
P11
P13
P14
P15
P18
P20
P23
P24
P27
DANTE RESET*
DANTE EN
DANTE/PIC* RS232
DANTE 1+
DANTE 1-
DANTE 2+
DANTE 2-
DANTE 8+
DANTE 8-
DANTE TX
DANTE RX
DANTE PRES*
DANTE 3+
DANTE 3-
DANTE 4+
DANTE 4-
DANTE 5+
DANTE 5-
DANTE 6+
DANTE 6-
DANTE 7+
DANTE 7-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
52808
CON5
MOLEX
DGND
AGND
50V
C4
1N0
50V
C5
1N0
P29
P28
0W063
R7
10K
0W063
R8
10K
+3V3 STBY
1
2
3
PH
CON6
JST
DGND
1
2
3
PH
CON7
JST
DGND
0W063
R9
100K
0W063
R10
100K
NF
NF
PA TEMP L
PA TEMP R
+3V3 MCU
+3V3 MCU
+3V3 MCU
+3V3 MCU
19_E007 JH 05/02/2019 G.0Temp sensor connectors added, Net name changes
FIX1
1
FIX2
1
19_E027 PK 17/04/19 1.0None to this sheet
CH GND
L1
220R@100MHz
DGND
19_E040 PK 02/12/19 2.0PCB change only
20_E038 PK 08/09/20 2.1None to this sheet
0W063
R2
0R0
DGND
20_E050 PK 16/12/20 3.0Add R2, fit R3
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