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NOTE:
IF EITHER INPUT JACK
IS CONNECTED UNIT
WILL WORK IN MONO
GOLD TIP&RING JACK
R1A
R3A
R5A
GND
953R
9K760
9K760
C1A
2
1n
1
JB1A 1
3
5
C2A
3
U1
GND
GND
GND
GND
1/2
1n
BAL.
TLO72
S
R
T
953R
9K760
R6A
INPUT
2
4
6
R2A
R4A
9K760
GND
CHANNEL
"A"
+15V
HEATSINK
R4
1W
100R
+55V
Q1
15K
C7
R6
STEREO/
100n
R8
MONO
470R
GND
16V
C9
500mW
ZD2
100n
16V
C10
500mW
1.4VRMS
ZD3
100n
FOR FULL
GND
OUTPUT
R9
POWER
C8
470R
15K
HEATSINK
R7
100n
Q2
-55V
R5
1W
100R
-15V
R1B
R3B
R5B
GND
953R
9K760
9K760
C1B
6
JB1B 1
3
5
7
1n
BAL.
5
S
R
T
C2B
U1
GND
1/2
INPUT
2
4
6
1n
TLO72
R6B
953R
9K760
CHANNEL
"B"
9K760
R2B
R4B
GOLD TIP&RING JACK
GND
ALL UNMARKED DIODES ARE IN4148
+15V
C12
C14
C16
C18
C20
C21
100n
100n
100n
100n
100n
100n
-15V
C13
C15
C17
C19
100n
100n
100n
100n
GND
M1085.SCH_DATABASE_HISTORY
MODEL(S):-
SR-300
#
DATE
VER#
DESCRIPTION OF CHANGE
REDREW OUTPUTS TO MATCH PWR AMP SCHEM.
1
NOV/24/95
1.20
.
2
MAR/31/99
1.30
UPDATE_POTS
3
OCT/08/99
1.40
HEATSINK_SYMBOL_ADDED
4
D
V
N
D
5
V
N
6
D
V
N
7
D
V
N
8
D
V
N
9
D
V
N
10
D
V
N
COMPONENTS INSIDE
THE DOTTED LINE ARE
LOCATED ON THE FRONT
PCB WHICH IS CONNECTED
TO THE REAR PCB WITH
A RIBBON CABLE
D6A
1N5240BRL
CLP
10V
LD4A
C22A
RED
470p
R7A
R8A
GND
10K
680K
10u
16V
SIGNAL
2
C3A
LD2A
1
R9A
3
U2
25A
1K
P1A
1/2
GRN
10K
TLO72
GND
POWER ON
LD1
R10
-15V
+15V
GND
GND
1K5
GREEN
+15V
D6B
1N5240BRL
10V
10K
C22B
R7B
SIGNAL
470p
LD2B
R8B
R9B
680K
1K
GRN
6
10u
16V
C3B
7
Q3
5
U2
GND
25A
BC560
P1B
1/2
10K
TLO72
+15V
GND
C11
22u
50V
-15V
-15V
R11
470R
R10B
R40B
R40A
-15V
100K
47K
47K
R31B
R31A
BC550
BC550
R11B
Q1B
Q1A
100K
100K
220K
CLP
R30B
R30A
9
LD4B
2K
2K
RED
YEL
YEL
LD3B
LD3A
LIMITER
LIMITER
PIN 11
GND
GND
11
12
13
14
15
16
V
N
17
18
19
20
21
22
23
24
25
R18A
91K
82n
47n
H.P.F
C6A
C8A
R19A
3
43K
IN
10M
2
R17A
OUT
1
GND
SW1
220n
220n
C7A
C9A
GND
R20A
91K
D1A
R25A
2
20KO
1
2
D3A
R24A
3
U4
1
R10A
20K0
3
1/2
U5
R12A
100K
5532
1/2
27K
D4A
TLO72
R11A
GND
220K
R13A
C5A
10p
18K
8
7
5
GND
3
D
2
LM13600
IABC
4
PIN 11
1/2
1
U3
R16A
-13V
20K0
D2A
R18B
91K
82n
47n
H.P.F
C6B
C8B
R19B
6
43K
IN
10M
5
R17B
OUT
4
GND
SW1
220n
220n
C7B
C9B
GND
R20B
D1B
91K
R25B
6
20K0
7
6
R24B
5
7
U4
20K0
5
1/2
U5
5532
R12B
1/2
TLO72
27K
GND
R13B
C5B
10p
18K
10
12
R14B
GND
100R
14
GND
33U
D
C10B
15
16V
LM13600
R15B
IABC
13
1/2
22M
GND
-13V
16
R16B
U3
20K0
D2B
KIL
(TO AMP "A"&"B")
DATE:
OCT/08/99
YORKVILLE
NAME:
M1085.SCH
STYLE
"P22"
1
TLO72
1/2
2
R23A
GND
3
U6
3
1
953R
2
R22A
4
133K1%
Q3A
R21A
2N5638
60K4_1%
OF AMPLIFIER
R39
KIL
+15V
3K
(TO AMP "A")
GND
R26A
C11A
C12A
Q4A
16V
33u
16V
10u
BC560
20K0
R27A
R28A
R29A
R35A
10K
180K
10K
1K5
2
+15V
1
3
U7
1/2
D5A
TLO72
27K
GND
R33A
Q2A
R37A
4.5V
BC560
10K
R14A
12K
R32A
C13A
R36A
100R
R34A
100u
4K7
1K
25V
33U
C10A
GND
GND
16V
BC560
GND
LIMITER
GND
R15A
-15V
22M
R38A
1K
1
2
GND
TLO72
3
1/2
R23B
4
5
U6
7
953R
Q3B
6
R22B
2N5638
OF AMPLIFIER
R39B
133K1%
R21B
GND
3K
KIL
+15V
60K4_1%
(TO AMP "B")
Q4B
BC560
R26B
C11B
C12B
16V
33u
16V
10u
R35B
20K0
1K5
R27B
R28B
R29B
+15V
10K
180K
10K
6
D3B
7
5
GND
U7
1/2
27K
TLO72
D4B
D5B
R33B
4.5V
Q2B
R37B
BC560
10K
12K
C13B
R36B
R32B
R34B
100u
4K7
25V
1K
GND
LIMITER
BC560
GND
-15V
R38B
1K
MODELS:
SR-300
DWG_1_OF_2
SCH ISSUE:
PCB#&VER:
M1085
TITLE:
INPUT/PREAMP
MJF6388
BC550C
MJF6668
BC560C
2N5638
D G S
C B E
B
C
E
CLP1"A"
CLP2"A"
GND
I/P"A"
TO INPUT
Q5A
CLP1"B"
CLP2"B"
GND
I/P"B"
TO INPUT
Q5B
1.40
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