ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No.
DESCRIPTION OF CHANGE
L943C5_5.1.SCH
A80/P80 - Power Amp Right
Contact Engineer:
L943C5
9-Sep-2003
INITIALS
Printed:
5
8
Sheet
of
Notes:
Contact Tel:
(01223) 203 200
Mark Tweedale
A & R Cambridge Ltd.
Pembroke Avenue
Cambridge CB5 9PB
Waterbeach
23425
->
0V_FB_R
PRE_OUT_R
0V_HF_R
0V_LS_R
0V_HF_R
VIPROT_R
OUTPUT_R
0V_LS_R
0V_HF_R
+45V_R
-45V_R
0V_HF_R
0V_HF_R
BIAS
MEASURE BIAS
INPUT FILTER
V TO I AMP
INTEGRATING DC SERVO
PNP CURRENT MIRROR
NPN CURRENT MIRROR
PRE DRIVER
PRE DRIVER
OUTPUT STAGE
V-I PROTECTION
V-I PROTECTION
VI PROTECT
SIGNAL TO MICRO
ZOBEL NETWORK
BOOT
ST
R
A
P
BOOT
ST
R
A
P
DZ504
BZX84C
15V
SOT-23
C510
100UF
25V
YK
TR508
FMMT497
SOT-23
C517
100N
50V
0805
C516
470P
100V
FKP2
C519
100N
50V
0805
C520
100N
50V
0805
C522
470N
100V
MKS2
C502
100P
100V
0805
C514
100UF
25V
YK
C525
10UF
50V
YK
C523
100UF
100V
YK
C505
10N
100V
0805
C524
100UF
100V
YK
C512
100UF
25V
YK
C513
100UF
25V
YK
C526
10UF
50V
YK
C527
100N
100V
MKS2
C521
100N
50V
0805
R522
100R
0W125
0805
R527
100R
0W125
0805
R524
100R
0W125
0805
R543
4K7
0W125
0805
R520
1M0
0W125
0805
TR507
FMMT497
SOT-23
TR502
FMMT597
SOT-23
R531
22R
0W125
0805
R510
1K0
0W125
0805
R502
22K
0W125
0805
2
3
1
8
4
IC500A
TL072CD
SO-8
6
5
7
IC500B
TL072CD
SO-8
TR504
FMMT597
SOT-23
DZ505
BZX84C
15V
SOT-23
TR511
FMMT497
SOT-23
R534
22R
0W125
0805
TR505
FMMT597
SOT-23
D501
BAS16
SOT-323
R511
1K0
0W125
0805
R554
100K
0W125
0805
R556
330R
0W125
0805
R525
100R
0W125
0805
D502
BAS16
SOT-323
TR509
FMMT497
SOT-23
TR506
FMMT597
SOT-23
TR510
FMMT497
SOT-23
TR503
FMMT597
SOT-23
R514
1K0
0W125
0805
1
2
CON501
HARWIN
M20-973
R557
330R
0W125
0805
R529
100R
0W125
0805
R530
100R
0W125
0805
D503
BAS16
SOT-323
D506
1N4003
DO-41
D507
1N4003
DO-41
R559
5R6
2W
CF
R536
10K
0W125
0805
R542
4K7
0W125
0805
R526
100R
0W125
0805
DZ500
BZX84C
22V
SOT-23
DZ501
BZX84C
22V
SOT-23
R541
10K
0W125
0805
R538
10K
0W125
0805
TR516
BC849B
SOT-23
TR517
BC849B
SOT-23
TR500
BC859B
SOT-23
TR501
BC859B
SOT-23
SHEET
3
R506
47R
0W125
0805
R507
47R
0W125
0805
R505
47R
0W125
0805
R508
47R
0W125
0805
R516
220R
0W25
MF
R515
220R
0W25
MF
R545
22R
0W25
MF
R546
22R
0W25
MF
R532
22R
0W125
0805
R535
22R
0W125
0805
R552
1K0
1W
CF
R553
1K0
1W
CF
D504
BAS16
SOT-323
D500
BAS16
SOT-323
C508
22UF
63V
YK
C509
22UF
63V
YK
0V_HF_R
0V_HF_R
C503
100P
100V
0805
RV500
220R
LIN
DZ506
BZX84C
3V9
SOT-23
0V_FB_R
0V_FB_R
0V_FB_R
NF
PRE DRIVER BIAS
& TEMP. COMP.
NF
R544
10K
0W125
0805
C500
47P
100V
0805
R513
1K0
0W125
0805
0V_HF_R
R500
22K
0W125
0805
R504
22K
0W125
0805
R501
10K
0W125
0805
C507
10N
100V
0805
C504
10N
100V
0805
R533
22R
0W125
0805
C511
100UF
25V
YK
C506
10N
100V
0805
* - Default jumper setting on pins 2 & 3; fit jumper
~1.6V
NF
C501
47P
100V
0805
C515
100UF
25V
YK
Q503
Q509
D505
1N4003
DO-41
D508
1N4003
DO-41
0V_FB_R
0V_FB_R
ADJUST
TR513
SAP15NY
SAP
TR515
SAP15PY
SAP
Q500
Q511
ITEM500
1
Con Jumper Socket 0.1IN Gold Blue
8K004
TR514A
ZDT758
SM-8
TR514B
ZDT758
SM-8
TR512A
ZDT6758
SM-8
TR512B
ZDT6758
SM-8
R549
820R
0W25
MF
R550
820R
0W25
MF
R547
820R
0W25
MF
R548
820R
0W25
MF
R509
1K0
0W125
0805
R512
1K0
0W125
0805
NF
NF
ANNOTATION
REF500
LM431AIM3
SOT-23
DZ502
BZX84C
3V9
SOT-23
DZ503
BZX84C
3V9
SOT-23
R519
470K
0W125
0805
R521
470K
0W125
0805
D509
BAV99
SOT-23
NF
R551
18K
0W25 MF
R558
18K
0W25 MF
P501
P502
P504
P505
P507
P508
P509
P510
P511
P513
P514
P515
P520
P527
P529
P530
P531
P532
P533
P538
P539
P540
P542
P544
P546
P549
P551
P552
P554
P556
P558
P559
R523
220R
0W25
MF
R528
220R
0W25
MF
0V_FB_R
0V_FB_R
0V_FB_R
0V_FB_R
OUT_R
R517
1K0
0W125
0805
R518
1K0
0W125
0805
R560
330R
0W125
0805
R503
10K
0W125 0805
R540
4K7
0W125 0805
R539
22K
0W125
0805
1
2
3
CON500
HARWIN
M20-973
remove jumper to decrease bias voltage
on pins 1 & 2 to increase bias voltage;
*
NF
NF
03_E116
TGP
NO CHANGE TO THIS SHEET
2.1
17 APR 03
03_E120
TGP
13 May 03
LEDs, BIAS & DOCUMENTATION CHANGE
3.0
R537
5K6
0W125
0805
03_E147
MJT
23 May 03
None to this sheet. PCB change.
4.0
03_E230
MJT
04 Aug 03
None to this sheet. Display snapoff fixing holes reduced to 3.2mm
5.0
A80
03_E264
MJT
09 Sept 03
None to this sheet. Remove EMC can from around IEC inlet.
5.1