EN-46
ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No.
DESCRIPTION OF CHANGE
L282 CT4 Net.SchDoc
AMP019 Net
Contact Engineer:
L282CT
08/09/2020
INITIALS
Printed:
4
7
Sheet
of
Notes:
Contact Tel:
(01223) 203201
Jon Henderson
A & R Cambridge Ltd.
Pembroke Avenue
Cambridge CB25 9QR
Waterbeach
A3
ARCAM
USB VBUS
P338
DGND
+3V3 ETH
0W063
R321
2K2
0W063
R320
2K2
DGND
+3V3 ETH
0W
06
3
R
30
0
49
R
9
0W
06
3
R
30
1
49
R
9
0W
06
3
R
30
2
49
R
9
0W
06
3
R
30
3
49
R
9
RED
LED300
0603
+3V3 ETH
RED
LED301
0603
RED
LED302
0603
0W063
R308
2K2
0W063
R313
2K2
0W063
R316
2K2
+3V3 ETH
+3V3 ETH
+3V3 ETH
LINK LED
ACT LED
SPEED LED
50V
C313
100N
50V
C314
100N
50V
C315
100N
+3V3 ETH
DGND
50V
C308
100N
50V
C309
100N
50V
C310
100N
6.3V
C311
10UF
DGND
PFOUT
TX CLK
1
TX EN
2
TXD0
3
TXD1
4
TXD2
5
TXD3/SNI MODE
6
PWR DOWN/INT
7
RD-
13
RD+
14
TD-
16
TD+
17
25MHz OUT
25
LED ACT/COL/AN EN
26
LED SPEED/AN1
27
LED LINK/AN0
28
RESETN
29
MDIO
30
MDC
31
X2
33
X1
34
RX CLK
38
RX DV/MII MODE
39
CRS/CRS DV/LED CFG
40
RX ER/MDIX EN
41
COL/PHY AD0
42
RXD0/PHY AD1
43
RXD1/PHY AD2
44
RXD2/PHY AD3
45
RXD3/PHY AD4
46
IC300A
DP83848CVVX/NOPB
RESERVED
8
RESERVED
9
RESERVED
10
RESERVED
11
RESERVED
12
AGND
15
AGND
19
RESERVED
20
RESERVED
21
AVDD33
22
IOVDD33
32
IOGND
35
DGND
36
IOGND
47
IOVDD33
48
PFBIN1
18
PFBOUT
23
PFBIN2
37
RBIAS
24
IC300B
DP83848CVVX/NOPB
0W063
R322
560R
0W063
R323
4K3
DGND
0W063
R312
1K5
+3V3 ETH
NET INT
DGND
TX EN
TX D0
TX D1
0W063
R310
33R
0W063
R311
33R
RX D0
RX D1
RX ER
CRS DV
0W063
R315
2K2
+3V3 ETH
MDC
MDIO
0W063
R317
1K5
+3V3 ETH
50V
C302
100N
+3V3 ETH
DGND
DGND
REF CLK
TX EN
TX D0
TX D1
RX D0
RX D1
RX ER
MDC
MDIO
CRS DV
REF CLK
NET INT
VBUS EN
VBUS EN
M300
FDN340P
+5V STBY
USB VBUS
0W063
R319
47K
TR300
MMUN2211LT1
P332
DGND
C1+
1
V+
2
C1-
3
C2+
4
C2-
5
V-
6
T2OUT
7
R2IN
8
R2OUT
9
T2IN
10
T1IN
11
R1OUT
12
R1IN
13
T1OUT
14
G
N
D
15
V
C
C
16
STATIC PROTECTED
SO16 WIDE
IC301
MAX3232ECWE
50V
C316
100N
50V
C318
100N
50V
C317
100N
50V
C319
100N
DGND
DGND
50V
C312
100N
DGND
L305
220R@100MHz
TX 232
RX 232
RS232 RX
RS232 TX
RS232 TX
RS232 RX
+3V3 MCU
+3V3 MCU
50V
NPO
C321
22P
50V
NPO
C322
22P
DGND
RS232
ETHERNET
USB
0W063
R309
560R
0W063
R314
560R
0W063
R318
560R
DGND
D
30
0
P
E
S
D
5V
0U
1B
B
D
30
1
P
E
S
D
5V
0U
1B
B
D
30
2
P
E
S
D
5V
0U
1B
B
D
30
3
P
E
S
D
5V
0U
1B
B
16V
C300
100N
16V
C301
100N
+3V3 ETH
GND
1
IO1
2
IO2
3
VCC
4
IC302
TPD2E001DZDR
50V
C320
100N
DGND
USB VBUS
+3V3 ETH
50V
C307
100N
DGND
50V
NPO
C306
22P
DGND
G
N
D
2
O/P
3
V
C
C
4
EN
1
X300
50MHz
1
2
3
4
5
6
7
8
9
DSB
CON302
ZH
E
J
IA
N
G
J
IN
J
IA
E
LE
C
TR
O
N
IC
S
C
o
LT
D
1
2
3
4
5
6
7
8
5075AUR-04
CON301
Neltron
DGND
P341
CH GND
CH GND
0W125
R307
0R0
0W125
R306
0R0
DGND
CH GND
L300
220R@100MHz
L301
220R@100MHz
L303
220R@100MHz
NF
DGND
CH GND
0W125
R304
0R0
0W125
R305
0R0
NF
1
3
4
2
L302
2200R @ 100MHz
1
3
4
2
L304
2200R @ 100MHz
C
30
3
100V
C305
1N0
PFOUT
+3V3 ETH
50V
C
30
4
33P
RX D1
DGND
RX D0
NF
P
31
3
P
32
1
P
32
7
P314
P323
P328
P302
P305
P301
P310
P311
P312
P316
P317
P318
P
31
5
P319
P320
P324
P325
P326
P
33
6
P330
P333
P334
P331
P329
P335
P342
P344
P345
P347
P348
P349
P343
P346
P350
P351
P352
P303
P322
P304
P300
P337
USB_N
USB_P
USB_N
USB_P
RXIN_N
RXIN_P
TXIN_N
TXIN_P
RX_N
RX_P
TX_N
TX_P
16V
C323
470UF
50V
C324
10N
50V
C325
10N
50V
C326
10N
M301
FDN340P
TR301
MMUN2211LT1
DGND
DGND
NET PSU EN
+3V3 STBY
0W063
R324
10K
6.3V
C327
10UF
NET PSU EN
+3V3 ETH
6.3V
C330
10UF
50V
C329
10N
50V
C328
33P
DGND
50V
C331
33P
DGND
2A
L306
330R@100MHz
50V
C332
100N
DGND
P307
P308
P306
P309
P339
19_E007
JH
12/02/2019
G.0
No changes to this sheet
TXP
1
TXC
4
TXN
2
RXP
3
RXC
5
RXN
6
CH
8
S
C
R
N
1
S
C
R
N
2
TM111B01GX1
CON300
Tian Mu Elec
19_E027
PK
20/05/19
1.0
Add 120pF on XTAL output, connect power down pin
DGND
0W063
R325
0R0
0W063
R326
0R0
NET PSU EN
NF
50V
C333
120P
19_E040
PK
02/12/19
2.0
PCB change only
20_E009
PK
25/02/20
2.1
None to this sheet
20_E038
PK
08/09/20
2.2
None to this sheet
Summary of Contents for HDA PA720
Page 1: ...SERVICE MANUAL POWER AMPLIFIER PA720 ISSUE A ...
Page 2: ...EN 2 Revision History Issue A Initial release ...
Page 14: ...EN 14 EN 14 L281 Power Amplifier PCB Issue 3 ...
Page 36: ...EN 36 EN 36 L282 Pre amp PCB Issue 2 ...
Page 50: ...EN 50 EN 50 L283 PSU PCB Issue 1 ...
Page 54: ...EN 54 L284 Lifter PCB Issue 1 ...
Page 59: ...EN 59 L285 Front Panel PCB Issue 1 ...
Page 62: ...EN 62 Overall Dimensions ...
Page 64: ...EN 64 Exploded Drawings ...