EN-49
ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No.
DESCRIPTION OF CHANGE
L282 CT7 Input Detect.SchDoc
AMP019 Balanced Input
Contact Engineer:
L282CT
08/09/2020
INITIALS
Printed:
7
7
Sheet
of
Notes:
Contact Tel:
(01223) 203201
Jon Henderson
A & R Cambridge Ltd.
Pembroke Avenue
Cambridge CB25 9QR
Waterbeach
A2
ARCAM
IP DET
IP DET
0W063
R619
47K
0W063
R620
47K
100V
C614
1uF
50V
C608
100P
0W063
R612
100K
50V
C604
100N
50V
C617
100P
0W063
R629
100K
50V
C607
100P
0W063
R611
100K
50V
C603
100N
TR600
BC846B
50V
C612
220P
50V
C611
220P
50V
C620
220P
AGND
AGND
AGND
NF
NF
NF
NF
AGND
AGND
AGND
DGND
DGND
DGND
0W063
R617
1K0
+3V3 MCU
0W063
R603
1M0
0W063
R604
1M0
0W063
R623
1M0
0W063
R607
1M0
0W063
R608
1M0
0W063
R626
1M0
2
3
1
8
4
IC602A
TL072CD
6
5
7
IC602B
TL072CD
2
3
1
8
4
IC603A
TL072CD
50V
C616
100P
0W063
R628
100K
50V
C606
100P
0W063
R609
100K
50V
C602
100N
50V
C609
220P
50V
C619
220P
AGND
AGND
NF
NF
AGND
AGND
0W125
R600
47R
0W063
R602
1M0
0W063
R622
1M0
0W063
R606
1M0
0W063
R625
1M0
2
3
1
8
4
IC601A
TL072CD
6
5
7
IC601B
TL072CD
+14V
50V
C615
100P
0W063
R627
100K
50V
C605
100P
0W063
R610
100K
50V
C601
100N
50V
C610
220P
50V
C618
220P
AGND
AGND
NF
NF
AGND
AGND
0W063
R601
1M0
0W063
R621
1M0
0W063
R605
1M0
0W063
R624
1M0
2
3
1
8
4
IC600A
TL072CD
6
5
7
IC600B
TL072CD
INPUT CH7+
INPUT CH7+
50V
C622
100N
-14V
50V
C623
100N
50V
C624
100N
50V
C625
100N
6
5
7
IC603B
TL072CD
+14V_IP
+14V_IP
+14V_IP
+14V_IP
+14V_IP
0W125
R633
47R
-14V_IP
-14V_IP
-14V_IP
-14V_IP
-14V_IP
35V
C621
47UF
35V
C600
47UF
25V
C613
10uF
P600
19_E007
JH
12/02/2019
G.0
No changes to this sheet
AGND
0W063
R614
6K8
0W063
R615
6K8
0W063
R630
6K8
0W063
R632
6K8
0W063
R631
6K8
0W063
R616
6K8
0W063
R613
6K8
0W063
R634
22K
0W063
R637
22K
0W063
R639
22K
0W063
R641
22K
0W063
R635
22K
0W063
R638
22K
0W063
R640
22K
100V
C626
1uF
AGND
0W063
R636
1M0
D600
BAS16
0W063
R618
2K2
19_E027
PK
20/05/19
1.0
Change input detect circuit
19_E040
PK
02/12/19
2.0
PCB change only
INPUT CH6+
INPUT CH6+
INPUT CH5+
INPUT CH5+
INPUT CH4+
INPUT CH4+
INPUT CH1+
INPUT CH1+
INPUT CH2+
INPUT CH2+
INPUT CH3+
INPUT CH3+
20_E009
PK
25/02/20
2.1
Net labels updated to match silkscreen
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 ...