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DRAWING NO.
23425
DRAWING TITLE
Drawn by:
DATE
Filename
ECO No.
DESCRIPTION OF CHANGE
J:\PROJECTS\A10amp\L829pb_Main_PCB\Circuits_&_PCB\wip\l829ct2_6.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
Alpha 10 Amp Power Ctrl
Circuit Diagram
L829CT2
SJB
10-Jul-1998
INITIALS
Date Printed
4
5
Sheet
of
Notes:
PWR
1
N1
2
N2
3
0V
4
V-
5
O
6
FB
7
RC
8
V+
9
Z5
TA7317P
R124
33K SM
R186
120K SM
R125
33K SM
+
C50
1U0 EL
R43
47K SM
+
C25
100U EL
R32
100K SM
+
C26
100U EL
+
C27
100U EL
R44
47K SM
R45
47K SM
R126
33K SM
R127
33K SM
+SUP
RLY1B
RLY SPST SPKR
RLY2B
RLY SPST SPKR
Speakers 1
Speakers 2
Speaker/Amp Protection
D23
1N4003F
D24
1N4003F
Q45
2SC2547
Q46
2SC2547
R200
2K7 1W CF
D35
BAS16W SM
D36
BAS16W SM
R19
1K0 FU
R20
1K0 FU
RLY5NC
RLY 51SB12T
D25
1N4003F
D26N
1N4003F
R201N
2K7 1W CF
Soft Start
Pre-Amp Out
Q47
2SC2547
D37
BAS16W SM
R21
1K0 FU
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
SK9N
FFC22V
-SUP
+
C15
10U EL
R46
47K SM
D38
BAS16W SM
Q56
BC859B
R203
2K4 SM
Q38
2SA1085
R204
10K SM
R205
6K8 1W CF
D43
5V6 400MW
+
C16
10U EL
8
4
Z8C
LM393A SM
-SUP
ABSUP
Auto-Bias supply
Power-off Auto-Bias defeat
ABSUP1
RLY3B
RLY SPST SPKR
RLY4B
RLY SPST SPKR
PRTSUP1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
SK6
FFC22V
D9
10V 400MW
D29
4V7 400MW
R206
100K SM
R207
100K SM
X1
CST4.00
C34
100N SM
+
C17
10U EL
LVProt
RVProt
R70
10K SM
D27
1N4003F
ACDet
Fault
+5V
1
2
3
SW3A
2PCO
4
5
6
SW3B
2PCO
1
2
3
SW4A
2PCO
4
5
6
SW4B
2PCO
1
2
3
SW5A
2PCO
4
5
6
SW5B
2PCO
SP 1
SP 2
STANDBY
Powerup
Fault
+PRE
-PRE
Rmin
RemOut
REMI1
REMO1
Fault
SP2MuteN
SP1MuteN
PreMuteN
Prot
SP2MuteN
SP1MuteN
Prot
PREMTN1
SP3_PWR
SP1
PROT1
FAULT1
+8V
SCK1
SDA1
REQ1
STBYLED1
STBYLED
REQ
SDA
SCK
VFault
VFault
SP2
VFAULT1
SP3_PWR
THERMX1
ThermX_RST
Option PCB
Display PCB
+5V
Rmin
Remote PCB
PWR Amp Control
Thermal Protection
Mains/VI Fault detection
R218P
220R SM
Q58R
BC859B
R225R
1K0 SM
REMK LL1
ATE IR RX Disable pad
User IR RX Disable Link
RLY6B
RLY SPDT 24V
1
2
3
LK10R
L815CA
LED PCB
1
2
3
4
LK9P
L836CA
1
2
3
4
LK9X
L836CA
R
G
LED1P
LED RED/GRN
STBY/POWER
!
LED PCB
!
Replace with same
type component only
!
!
C3
100N SM
SP1SW1
SP2SW1
STBYSW1
Designators ending in...
N - For integrated amp only,
P - For power amp only,
R - For power amp with remote only,
S - For power amp with no remote
only,
X - Other end of wire link.
PB5
1
PB4
2
PA3
3
PA2
4
PA1
5
PA0
6
PB3
7
PB2
8
PB1
9
PB0
10
VSS
11
(TMR)/INT
12
PC0
13
PC1
14
PC2
15
PC3
16
PC4
17
PC5
18
RES
19
VDD
20
OSC1
21
OSC2
22
PA7
23
PA6
24
PA5
25
PA4
26
PB7
27
PB6
28
Z9
HT48R30 28-DIP-B-0
R235
100K SM
VREF
1
Vt2
2
Vt1
3
GND
4
Vtemp
5
OUT2
6
OUT1
7
VCC
8
Z11
LM56CIM
VREF
1
Vt2
2
Vt1
3
GND
4
Vtemp
5
OUT2
6
OUT1
7
VCC
8
Z10
LM56C M
R33
12K SM
R34
11K SM
R189
22K SM
R191
22K SM
+5V
+5V
R65
220R SM
Powerup
Powerup
Cutout
RFProt
Therm
ProtStat
RemMute
R234
10K SM
R233
10K SM
FAN
Q_1
Q_15
THTESTR
ATE_PAD
THTESTL
ATE_PAD
Q58
BC859B
R116
10K SM
+5V
Q59
BC849B
Q_9
Q_28
Q_31
Q_32
+UREG
R147
470R SM
R173
470R SM
C81
22P SM
C82
22P SM
R100
4K7 SM
R142
4K7 SM
D20
BAS16W SM
D28
BAS16W SM
D30
BAS16W SM
D40
BAS16W SM
Lout
Rout
Rout
Lout
RF Protection
R98
27K SM
R175
4K7 SM
D48
4V7 400MW
+SUP
Pwrok
Power Supply Detection
A0
1
A1
2
A2
3
VSS
4
SDA
5
SCL
6
WP
7
VDD
8
Z12
24C02 SM
+5V
R190
1M0 SM
R192
470K SM
+
C11
1U0 EL
Q34
BC849B
Q_14
Q_27
Q_33
C84
100N SM
R214
4K7 SM
R215
4K7 SM
RESET
R218
120K SM
Fit Jumper to PL1 for
test power-up from
external d.c. supply
-SUP
R219
10K SM
Send
Break
Demod
Raw
REMOTE
L829CT5_6 SCH
5
SJB
Hardware Remote RX
n.b. R33 & R34 are supposed to be different!
No Change
2
SJB
26-9-97
22-9-97
97_1085
97_1086
SJB
No Change
3
22-10-97
97_1096
SJB
No Change
11-11-97
97_1102
4
6
Q_53
Q_54
Q_64
R31
27K SM
R185
27K SM
Pwrok
1
2
PL1
2WVERTJUMPER
SJB
PCB Issue 2 to 3 changes
9-7-98
98_1042
