EN-45
ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No.
DESCRIPTION OF CHANGE
L282 CT3 Unbalanced Input.SchDoc
AMP019 Unbalanced Input
Contact Engineer:
L282CT
08/09/2020
INITIALS
Printed:
3
7
Sheet
of
Notes:
Contact Tel:
(01223) 203201
Jon Henderson
A & R Cambridge Ltd.
Pembroke Avenue
Cambridge CB25 9QR
Waterbeach
A2
ARCAM
AGND
AGND
50V
C201
22P
-14V
+14V
AGND
UNBAL 7+
D200
BAT54S
-14V
+14V
AGND
UNBAL 7-
AGND
0W125
R203
47R
AGND
AGND
50V
C205
22P
AGND
UNBAL 6+
D202
BAT54S
-14V
+14V
AGND
UNBAL 6-
AGND
0W125
R221
47R
-14V
+14V
AGND
AGND
50V
C209
22P
-14V
+14V
AGND
D204
BAT54S
-14V
+14V
AGND
AGND
0W125
R239
47R
AGND
AGND
50V
C213
22P
AGND
UNBAL 4+
D206
BAT54S
-14V
+14V
AGND
UNBAL 4-
AGND
0W125
R257
47R
-14V
+14V
AGND
AGND
50V
C203
22P
AGND
D201
BAT54S
-14V
+14V
AGND
UNBAL 3-
AGND
0W125
R207
47R
-14V
+14V
AGND
AGND
50V
C207
22P
-14V
+14V
AGND
UNBAL 2+
D203
BAT54S
-14V
+14V
AGND
UNBAL 2-
AGND
0W125
R228
47R
AGND
AGND
50V
C211
22P
AGND
UNBAL 1+
D205
BAT54S
-14V
+14V
AGND
UNBAL 1-
AGND
0W125
R243
47R
-14V
+14V
UNBAL 3+
UNBAL 7+
UNBAL 7-
UNBAL 6+
UNBAL 6-
UNBAL 4+
UNBAL 4-
UNBAL 3+
UNBAL 3-
UNBAL 2+
UNBAL 2-
UNBAL 1+
UNBAL 1-
50V
C221
100N
50V
C235
100N
AGND
+14V
-14V
50V
C222
100N
50V
C236
100N
50V
C223
100N
50V
C237
100N
50V
C224
100N
50V
C238
100N
50V
C225
100N
50V
C239
100N
50V
C226
100N
50V
C240
100N
50V
C227
100N
50V
C241
100N
0W125
R263
0R0
CH GND
AGND
RCA 7
RCA 6
AGND
RCA 5
RCA 4
AGND
RCA 3
RCA 2
AGND
RCA 7
RCA 6
RCA 5
RCA 4
RCA 3
RCA 2
RCA 1
NF
0W125
R264
0R0
DGND
AGND
CH GND
6
5
7
IC200B
LME49723MA
2
3
1
8
4
IC200A
LME49723MA
6
5
7
IC201B
LME49723MA
2
3
1
8
4
IC201A
LME49723MA
6
5
7
IC202B
LME49723MA
2
3
1
8
4
IC202A
LME49723MA
6
5
7
IC203B
LME49723MA
2
3
1
8
4
IC203A
LME49723MA
6
5
7
IC204B
LME49723MA
2
3
1
8
4
IC204A
LME49723MA
6
5
7
IC205B
LME49723MA
2
3
1
8
4
IC205A
LME49723MA
6
5
7
IC206B
LME49723MA
2
3
1
8
4
IC206A
LME49723MA
0W1
0.10%
R218
2K0
0W1
0.10%
R210
2K0
0W1
0.10%
R213
2K0
0W1
0.10%
R233
2K0
0W1
R224
2K0
0W1
R226
2K0
0W1
0.10%
R254
2K0
0W1
R246
2K0
0W1
R249
2K0
0W1
0.10%
R266
2K0
0W1
R260
2K0
0W1
R262
2K0
0W1
0.10%
R219
2K0
0W1
R211
2K0
0W1
R215
2K0
0W1
0.10%
R237
2K0
0W1
R232
2K0
0W1
R235
2K0
0W1
0.10%
R255
2K0
0W1
R247
2K0
0W1
R251
2K0
NF
0W125
R216
0R0
NF
NF
NF
NF
NF
NF
0W125
R217
0R0
0W125
R231
0R0
0W125
R236
0R0
0W125
R252
0R0
0W125
R253
0R0
0W125
R265
0R0
P226
P236
P
22
3
P222
P230
P231
P228
P227
P239
P237
P242
P244
P241
P240
P234
P238
P225
P224
P233
P235
P232
P229
P245
P243
P248
P249
P247
P246
P263
P265
P266
P264
P269
P271
P268
P267
P256
P253
P252
P261
P262
P260
P257
P274
P276
P270
P251
P250
P258
P259
P255
P254
G6K-2F-TR DC12
RLY200A
OMRON
0W063 R202
0R0
G6K-2F-TR DC12
RLY200B
OMRON
0W063
R205
0R0
DANTE 2+
DANTE 2+
DANTE 2-
DANTE 2-
G6K-2F-TR DC12
RLY202A
OMRON
0W063 R220
0R0
G6K-2F-TR DC12
RLY202B
OMRON
0W063
R223
0R0
DANTE 1+
DANTE 1+
DANTE 1-
DANTE 1-
G6K-2F-TR DC12
RLY204A
OMRON
0W063 R238
0R0
G6K-2F-TR DC12
RLY204B
OMRON
0W063
R241
0R0
DANTE 4+
DANTE 4+
DANTE 4-
DANTE 4-
UNBAL 5+
UNBAL 5-
UNBAL 5+
UNBAL 5-
G6K-2F-TR DC12
RLY206A
OMRON
0W063 R256
0R0
G6K-2F-TR DC12
RLY206B
OMRON
0W063
R259
0R0
DANTE 3+
DANTE 3+
DANTE 3-
DANTE 3-
G6K-2F-TR DC12
RLY201A
OMRON
0W063 R206
0R0
G6K-2F-TR DC12
RLY201B
OMRON
0W063
R209
0R0
DANTE 6+
DANTE 6+
DANTE 6-
DANTE 6-
G6K-2F-TR DC12
RLY203A
OMRON
0W063 R227
0R0
G6K-2F-TR DC12
RLY203B
OMRON
0W063
R230
0R0
DANTE 5+
DANTE 5+
DANTE 5-
DANTE 5-
G6K-2F-TR DC12
RLY205A
OMRON
0W063 R242
0R0
G6K-2F-TR DC12
RLY205B
OMRON
0W063
R245
0R0
DANTE 7+
DANTE 7+
DANTE 7-
DANTE 7-
G6K-2F-TR DC12
R
LY
20
0C
OMRON
G6K-2F-TR DC12
R
LY
20
1C
OMRON
G6K-2F-TR DC12
R
LY
20
2C
OMRON
G6K-2F-TR DC12
R
LY
20
3C
OMRON
G6K-2F-TR DC12
R
LY
20
4C
OMRON
G6K-2F-TR DC12
R
LY
20
5C
OMRON
G6K-2F-TR DC12
R
LY
20
6C
OMRON
RCA/DANTE*
D207
BAS16
AGND
TR200
MMBTA06L
0W063
R267
2K2
1
2
M20-973
CON200
HARWIN
AGND
+11V
P273
P
27
5
RCA/DANTE*
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
NF
25V
C214
10uF
25V
C215
10uF
25V
C216
10uF
25V
C217
10uF
25V
C218
10uF
25V
C219
10uF
25V
C220
10uF
25V
C228
10uF
25V
C229
10uF
25V
C230
10uF
25V
C231
10uF
25V
C232
10uF
25V
C233
10uF
25V
C234
10uF
P209
P277
P279
P280
P283
P285
P287
P288
P284
P286
P281
P282
P272
P278
P289
19_E007
JH
12/02/2019
G.0
Net name changes
19_E027
PK
20/05/19
1.0
Input resistor value changes for gain matching
50V
C200
100P
0W125
Thin Film
R204
1K0
0W125
Thin Film
R212
22K
0W125
Thin Film
R222
1K0
0W125
Thin Film
R240
1K0
0W125
Thin Film
R258
1K0
0W125
Thin Film
R208
1K0
0W125
Thin Film
R225
22K
0W125
Thin Film
R248
22K
0W125
Thin Film
R261
22K
0W125
Thin Film
R214
22K
0W125
Thin Film
R234
22K
0W125
Thin Film
R250
22K
50V
C204
100P
50V
C208
100P
50V
C212
100P
50V
C202
100P
50V
C206
100P
50V
C210
100P
0W125
Thin Film
R229
1K0
0W125
Thin Film
R244
1K0
19_E040
PK
02/12/19
2.0
PCB change only
NOTE DANTE CHANNELS ARE SWAPPED
20_E009
PK
25/02/20
2.1
Net labels updated to match silkscreen
3
1
4
2
5
R
C
A
-2
13
F
SKT202
D
on
g
B
o
E
le
ct
ro
ni
cs
B
K
B
K
RCA-413
SKT201
Trenpro
B
K
B
K
RCA-413
SKT200
Trenpro
B
K
B
K
RCA-413
SKT203
Trenpro
20_E038
PK
08/09/20
2.2
Change sockets to black
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 ...