YORKVILLE SR300 User manual

U.S.A.
Yorkville Sound Inc.
4625 Witmer Industrial Estate
Niagara Falls, New York
14305 USA
Voice: [phone]
Fax: [phone]
WORLD HEADQUARTERS
WEB ACCESS: http://www.yorkville.com
CANADA
Yorkville Sound
550 Granite Court
Pickering, Ontario
L1W-3Y8 CANADA
Voice: [phone]
Fax: [phone]
Quality and Innovation Since 1963
Printed in Canada
SERVICE MANUAL

IMPORTANT SAFETY INSTRUCTIONS
safety-4v3.eps • Oct. 26/05
CAUTION:
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO
NOT REMOVE COVER (OR BACK).
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
INSTRUCTIONS PERTAINING TO A
RISK OF FIRE, ELECTRIC SHOCK,
OR INJURY TO PERSONS
Read Instructions
The Owner’s Manualshould be read and understood
before operation of your unit. Please, save these instruc-
tions for future reference.
Packaging
Keep the box and packaging materials, in case the unit
needs to be returned for service.
Warning
When using electric products, basic precautions should
always be followed, including the following:
Power Sources
Your unit should be connected to a power source only of the voltage
specified in the owners manual or as marked on the unit.This unit has a
polarized plug. Do not use with an extension cord or receptacle unless
the plug can be fully inserted. Precautions should be taken so that the
grounding scheme on the unit is not defeated.
Hazards
Do not place this product on an unstable cart, stand, tripod, bracket or
table.The product may fall, causing serious personal injury and serious
damage to the product. Use only with cart, stand, tripod, bracket, or
table recommended by the manufacturer or sold with the product.
Follow the manufacturer’s instructions when installing the product and
use mounting accessories recommended by the manufacturer.
The apparatus should not be exposed to dripping or splashing water;
no objects filled with liquids should be placed on the apparatus.
Terminals marked with the “lightning bolt” are hazardous live; the
external wiring connected to these terminals require installation by an
instructed person or the use of ready made leads or cords.
Ensure that proper ventilation is provided around the appliance.
No naked flame sources, such as lighted candles, should be
placed on the apparatus.
Power Cord
The AC supply cord should be routed so that it is unlikely that it will be
damaged.If the AC supply cord is damaged DO NOT OPERATE THE UNIT.
Service
The unit should be serviced only by qualified service personnel.
AVIS:
AFIN DE REDUIRE LES RISQUE DE CHOC ELECTRIQUE,
N’ENLEVEZ PAS LE COUVERT (OU LE PANNEAU ARRIERE)
NE CONTIENT AUCUNE PIECE
REPARABLE PAR L’UTILISATEUR.
CONSULTEZ UN TECHNICIEN QUALIFIE
POUR L’ENTRETIENT
INSTRUCTIONS RELATIVES AU RISQUE
DE FEU, CHOC ÉLECTRIQUE, OU
BLESSURES AUX PERSONNES
Veuillez Lire le Manuel
Il contient des informations qui devraient êtres comprises
avant l’opération de votre appareil. Conservez S.V.P. ces
instructions pour consultations ultérieures.
Emballage
Conservez la boite au cas ou l’appareil devait être
retourner pour réparation.
Attention:
Lors de l’utilisation de produits électrique, assurez-
vous d’adhérer à des précautions de bases incluant
celle qui suivent:
Alimentation
L’appareil ne doit être branché qu’à une source d’alimentation
correspondant au voltage spécifié dans le manuel ou tel qu’indiqué sur
l’appareil. Cet appareil est équipé d’une prise d’alimentation polarisée.
Ne pas utiliser cet appareil avec un cordon de raccordement à moins
qu’il soit possible d’insérer complètement les trois lames. Des
précautions doivent êtres prises afin d’eviter que le système de mise à
la terre de l’appareil ne soit désengagé.
Risque
Ne pas placer cet appareil sur un chariot, un support, un trépied ou une
table instables. L’appareil pourrait tomber et blesser quelqu’un ou subir
des dommages importants. Utiliser seulement un chariot, un support,
un trépied ou une table recommandés par le fabricant ou vendus avec
le produit. Suivre les instructions du fabricant pour installer l’appareil et
utiliser les accessoires recommandés par le fabricant.
Il convient de ne pas placer sur l’appareil de sources de flammes
nues, telles que des bougies allumées.
L’appeil ne doit pas être exposé à des égouttements d’eau ou des
éclaboussures et qu’aucun objet rempli de liquide tel que des vases
ne doit être placé sur l’appareil.
Assurez que lappareil est fourni de la propre ventilation.
Les dispositifs marqués d’une symbole “d’éclair” sont des parties
dangereuses au toucher et que les câblages extérieurs connectés à
ces dispositifs de connection extérieure doivent être effectivés par un
opérateur formé ou en utilisant des cordons déjà préparés.
Cordon d’Alimentation
Évitez d’endommager le cordon d’alimentation. N’UTILISEZ PAS
L’APPAREIL si le cordon d’alimentation est endommagé.
Service
Consultez un technicien qualifié pour l’entretien de votre appareil.

SR-300
YS No. Description Qty. YS No. Description Qty.
3747 CUSTOM .5 LED SPACER BLACK 7 4597 22AWG STRAN TC WIR JMP 11
6405 RED 3MM LED 1V7 5MA BRT 2 5299 24AWG SOLID SC WIR RAD JMP 7
6400 YEL 3MM LED 1V9 6MA HIGHEFF 2 4749 5.0W 0R15 5% BLK RES 4
6401 GRN 3MM LED 1V9 6MA HIGHEFF 3 4748 2.0W 3R9 5% T&R 2
6825 1N4148 75V 0A45 DIODE T&R 41 2008 1.0W 10R 5%FLAME PROOF T&R RES 2
6438 1N4004 400V 1A0 DIODE T&R 2 4605 1/8W 10R 5% T&R RES 4
6827 1N5402 200V 3A0 DIODE 4 2014 1/8W 33R 2%FLAME PROOF T&R RES 6
6434 6A2 200V 6A0 DIODE 4 4604 1/4W 33R2 1% T&R RES 4
6733 BAT85 30V 0A2 DIODE SCHTKYT&R 4 4811 1/4W 68R 5% T&R RES 2
6461 1N5240BRL 10V0 0W5 ZENER 5% T&R 2 4735 1.0W 100R 5% T&R RES 2
6824 1N5246B 16V0 0W5 ZENER 5% T&R 6 4852 1/4W 100R 5% T&R RES 1
6463 1N5251BRL 22V0 0W5 ZENER 5% T&R 1 4921 1/4W 100R 5% .2"U T&R RES 1
5101 BC550C TO92 NPN TRAN T&R TB 8 4897 1/4W 120R 5% T&R RES 2
5102 BC560C TO92 PNP TRAN T&R TB 11 2020 1/8W 150R 2%FLAME PROOF T&R RES 4
5103 MPSA06 TO92 NPN TRAN T&R TA 2 4986 1/4W 270R 5%MINI T&R RES 2
5104 MPSA56 TO92 PNP TRAN T&R TA 2 2025 1/8W 274R 1%FLAME PROOF T&R RES 4
6780 MPSA56 TO92 PNP TRAN TA 2 4950 1/4W 390R 5% .2"U T&R RES 6
5119 2N5638 TO92 NCH JFET T&R TC 2 4821 1/4W 470R 5% T&R RES 3
6810 MJF15030 T221D NPN TRAN TJ 2 2030 1/8W 681R 1%FLAME PROOF T&R RES 2
6811 MJF15031 T221D PNP TRAN TJ 2 4869 1/4W 750R 5% T&R RES 2
6814 MJF6668 T221D PNP TRAN DARL TJ 1 4758 1/4W 953R 1% T&R RES 6
6815 MJF6388 T221D NPN TRAN DARL TJ 1 4823 1/4W 1K 5% T&R RES 4
6988 MJL21194 TO3P NPN TRAN TK 2 4981 1/4W 1K 5%MINI T&R RES 2
6991 MJL21193 TO3P PNP TRAN TK 2 4824 1/4W 1K5 5% T&R RES 2
6840 MC33078P IC DUAL OP AMP 2 4988 1/4W 1K5 5%MINI T&R RES 1
6882 TL072CP IC FET DUAL OP AMP 5 4808 1/4W 2K 5% T&R RES 2
6884 NE5532N IC DUAL OP AMP 1 4705 2.0W 2K2 5% BLK RES 4
6745 LM13600N IC XCONDUCTANCE AMP 1 4847 1/4W 2K2 5% T&R RES 1
6880 4N35 OPTO-COUPLER 2 6124 1/4W 3K 5%MINI T&R RES 2
6467 10K 10% THERMISTOR NTC TO-92 2 4992 1/4W 3K16 1% T&R RES 4
5200 _10P 200V 5%CAP T&R RAD CER.2"NPO 2 4756 1/4W 4K120 0.1% *** T&R RES 2
5406 _33P 50V 10%CAP BLK BEAD NPO 2 4943 1/4W 4K7 5% .2"U T&R RES 2
5410 100P 100V 10%CAP T&R BEAD NPO 2 6121 1/4W 6K98 1%MINI MF T&R RES 2
5416 470P 50V 10%CAP T&R BEAD NPO 2 4787 1/4W 7K960 0.1% *** T&R RES 2
5206 __1N 400V 5%CAP T&R RAD .2"FLM 4 4762 1/4W 9K760 0.1% *** T&R RES 8
5422 __1N 50V 10%CAP T&R BEAD NPO 2 4829 1/4W 10K 5% T&R RES 2
5423 __1N2 50V 10%CAP T&R BEAD X7R 2 4940 1/4W 10K 5% .2"U T&R RES 8
6451 __4N7 250V 20%CAP BLK 'Y' 10MM AC 1 4983 1/4W 10K 5%MINI T&R RES 3
5204 _10N 100V 10%CAP T&R RAD .2"FLM 4 4856 1/4W 12K 5% T&R RES 2
6435 _22N 275V 20%CAP BLK 'X2' 15MM AC 1 4953 1/4W 12K 5% .2"U T&R RES 2
5224 _47N 100V 10%CAP T&R RAD .2"FLM 2 4830 1/4W 15K 5% T&R RES 2
5227 _82N 100V 5%CAP T&R RAD .2"FLM 2 4954 1/4W 18K 5% .2"U T&R RES 2
5228 100N 100V 5%CAP T&R RAD .2"FLM 16 6123 1/4W 20K0 1%MINI MF T&R RES 10
5314 100N 50V 10%CAP T&R BEAD X7R 2 4833 1/4W 27K 5% T&R RES 3
5231 220N 63V 10%CAP T&R RAD .2"FLM 6 4956 1/4W 27K 5% .2"U T&R RES 1
5255 __1U 63V 20%CAP T&R RAD .2"EL 1 6122 1/4W 33K 5%MINI T&R RES 2
5257 __2U2 63V 20%CAP T&R RAD .2"EL 3 4794 1/4W 37K90 0.1% *** T&R RES 2
5281 _10U 16V 20%CAP T&R RAD .2"NP 4 4878 1/4W 43K 5% T&R RES 2
5260 _22U 50V 20%CAP T&R RAD .2"EL 1 4834 1/4W 47K 5% T&R RES 2
5961 _33U 16V 20%CAP T&R RAD .2"NP 6 4761 1/4W 60K4 1% T&R RES 2
5267 100U 25V 20%CAP T&R RAD .2"EL 4 4898 1/4W 91K 5% T&R RES 4
5630 330U 25V 20%CAP BLK 10X13MM EL 4 4942 1/4W 100K 5% .2"U T&R RES 2
5869 4700U 63V 20%CAP BLK 25X40MM ELS 2 6120 1/4W 100K 5%MINI T&R RES 6
4390 _10K AUD 16MM DETENT P22 2 4991 1/4W 133K 1%MINI T&R RES 2
4522 __4K7 TRIM POT 2 4796 1/4W 180K 5%MINI T&R RES 2
714 1.5 MIL X 36" CLEAR POLY SHEETING 4 4841 1/4W 220K 5% T&R RES 2
3819 ___5UH COIL 18AWG R000 AIR CORE 2 6135 1/4W 270K 5%MINI T&R RES 2
3489 CLIP 250X032 18-22AWG DISCO/INSL 3 4880 1/4W 680K 5% T&R RES 2
3491 CLIP 205/187X020 18-22AWG DISCO/INS 1 4845 1/4W 2M2 5% T&R RES 1
3682 250 MALE PCB TAB BULK CARTRIGE 7 4809 1/4W 10M 5% T&R RES 2
3452 BND POST PCB MT HORZ QUAD ASSEMBLY 1 4751 1/4W 22M 5% T&R RES 2
3498 1/4" JCK PCB MT HORZ 2 3690 _8" 4C-28AWG RIB 1 W/LCK HDR 098 2
3528 1/4" JCK PCB MT HORZ GOLD TR_ 2 3574 _9" 5C-22AWG RIBBON CABLE 0.1" 2
3451 EYELET SMALL 0.089 OD PLATED 5 3603 16" 13C-24AWG RIBBON CABLE 0.1" 1
3412 LOWPROFILE FUSEHOLDER 1/4" LITTLEFS 1 8870 #4 X 1/4 PAN PH TYPE A ZINC 2
3414 INTERNATIONAL PC MOUNT FUSEHOLDER 4 8865 4-40 X 5/16 PAN PH MS JS500 4
2427 5.0 AMP SLO-BLO .25X1.25 FUSE 1 8861 4-40 X 3/8 PAN PH MS JS500 2
2405 10.0 AMP SLO-BLO .25X1.25 FUSE 2 8801 6-32 X 3/8 PAN PH TAPTITE JS500 2
8434 AP SERIES PLASTIC HANDLE PAIR 2 8829 6-32 X 3/8 FLAT PH TAPTITE BO#4 HEA 22
3501 B52200F006 COMP WASH #4 SMALL 2 8824 8-32 X 5/16 PAN QUAD TAPTITE JS500 14
3745 DUAL XSISTOR PBL SPRING PLATE ZN 2 8869 8-18 X 1/2 THRD CUTTING FOR PLASTIC 4
3885 XSISTOR SPRING CLIP TO-220 4 8999 8-32 X 5/8 PAN PH TAPTITE JS500 7
3795 #8 GROUND LUG ZIERICK 505-169 1 8765 1/4-20 X 2 1/2 HEX HD MS JS500 BLK 1
3810 4" NYLON CABLE TIE 4 8607 3/16 NYLON SPACER OD 1/8 X ID .063 18
3827 SQUARE BUMPER BUTTON BLACK 5 3744 SNAP IN .375 SPACER RICHCO 5
8433 AP SERIES PLASTIC KNOB 2 8818 3/4 OD X 5/16 ID X .08 THICK WASHER 2
8661 BUTTON KNOB FLAT GREY 2 3511 #6 FLAT WASHER NYLON 2
3484 8' 3/18 SJT AC LINE CORD 250WH187BL 1 8850 #10 INT TOOTH LOCKWASHER BO 4
3834 HEYCO #1214 STRAIN RELIEF 1 3436 DPDT PUSH SW PCMT H BREAK B4 MAKE 2
3593 PCB CONN 90 5 CIR .156 2 3587 DPDT ROKR SW QUIK 250"AC/PWR ON-OFF 1
3654 PCB CONN 4 CIR .100 LOCKING 2 1248 SR-300 POWER TRANSFORMER T'RD 1
3655 13 CIR CABLE HOLDER .098 2
5989 4 CIR CABLE HOLDER .098 2
8793 4-40 HEX NUT ZINC 2
8800 6-32 KEPS NUT ZINC 2
8788 1/4-20 KEPS NUT ZINC 1
3830 TO218 PREGREASED MICA 56-78-2AP 4

YORKVILLE NAME: PCB#&VER:
MODELS: SCH ISSUE:
TITLE:
DATE:
M1085
SR-300
M1085AMP.SCH
APR/30/2003
AMPLIFIER_150W
1.80
MJE15030
Q8L
2u2
63V
C3L
1n2
C12L
MJ15031
Q10L
MJL21193
Q9L
MJL21194
Q11L
33R
R29L
1n
C11L
100K
R5L
100K
R6L
SRT
USE
GOLD
120R
R19L
390R
R43L
3R9
2W
R38L
HEATSINK
HEATSINK
16V
1N5246A
D8L
D30L
BC560
Q6L
16V
1N5246A
D9L
D16L
270K
R50L
270R
R14L
D15L
D2L
A
C
NC
E
C
B
4N35
U2L
1
2
34
5
6
0R15
5W
R31L
0R15
5W
R33L
1/2
33078
U1L
6
5
7
20K
R12L
D13L
D1L
MPSA56
Q5L
D14L
68R
R36L
100p
C9L
1N5402
D11L
1N5402
D12L
390R
R13L
D17L
56K
R8AL
100n
C4L
100n
C5L
MPSA06
Q4L
750R
R15L BAT85
D3L
1
5uHL1L
1
220n
C8L
5
BC560
Q1L
33pF
C2L
1/2
33078
U1L
2
3
1
7K96
R3L
681R
R4L
4K12
R1L
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
APR/30/03
SEP/30/02
OCT/08/99
.
APR/27/99
MAR/30/99
DEC/08/95
NOV/24/95
.
JUL/12/95 V
1.80
1.70
1.60
.
1.50
1.40
1.30
1.20
.N
ADD_R8AL_FOR_BIAS_ADJUSTMENT
CORRECTION_R27L/R28L->1/8W-FLM-PRF
HEATSINK_SYMBOL_ADDED
R51L,Q15L,D30L
PC#5890_RT1L_100K->10K_ADD_R50L,
R11L_15K->12K
PC#4971
.
SR-300
M1085PA.SCH_DATABASE_HISTORY
10R
1W
R37L
3K16
R25L
3K16
R26L
33R2
R21L
274R
R20L
274R
R23L
33R2
R24L
10K
RT1L
BC550
Q7L
6K98
R18L
D5L
D6L
BC550
Q2L
330u
25V
C6L
100u
25V
C7L
2K2
2W
R30L
2K2
2W
R35L
D7L
D10L
BAT85
D4L
MPSA56
Q3L
390R
R10L
10K
R8L
12K
R11L
33u16V
C1L
CW
4K7
A
R9L
10R
R46L
D26L
D27L
CSA
4n7
2
CSA
22n
T2.5A
13A/85C
T10A
CSA
4n7
C1
EY1
TB7
TB5
TB6
TB3
TB2
TB4
TB1
T10A
63V
2u2
C6
D7
2M2
R3
63V
1u
C5 10K
R2
22VZ
5251B
ZD1
CSA
22n
C2
5A-SB
F1
13A/85C
BR1
S1
10A-SB
F3
10A-SB
F2
IN4004
D6
2K2
R1
50Hz
370VA
#1248E
C4
63V
4700u
37K9
R2L
PX6A02
D3
PX6A02
D4
MJF6668
MJF6388
ECB
MPSA06
EBC
MPSA56
3
DSG
2N5638 BC550C
CBE
BC560C
10K
R42L
D25L
MJL21194
MJL21193
ECB TP
BCE
MJE15031
MJE15030
4
C3
63V
4700u
3
PX6A02
D1
2
330u
25V
C23L
IN4004
D5
60Hz
370VA
#1248
T1
PX6A02
D2
33R
R44L
10R
R47L
33R
R45L
10N
C10L
33K
R51L
BC550
Q15L
10N
C13L
HEATSINK
HEATSINK
HEATSINK
HEATSINK
1/8W
150R-FP
R27L
1/8W
150R-FP
R28L
CLP2
GNDGND
GND
GND GND
GND
KIL
+16V_BAT
+16V_BAT
-16V_BAT
O/P
O/P
-55V
-55V
-55V
+55V
+55V
+55V
+55V
AMP-IN
AGND
AGNDAGND
AGND
AGND
CIRCUIT WITHIN BOX IS NOT
ON POWER AMP BOARD
REMOVE R8AL AS REQUIRED TO ADJUST BIAS
ADDED BATTERY BYPASS CIRCUIT
PIN 8 U1
ADDED O/P JACKS CORRECTED I/P WIRES
1.10 D27L, R43L. R19L FROM 510R TO 120R PC#4850/4851 REMOVE R7L, C13L ADD D26L
1. ADJUST R9 ACCROSS TP1&TP2 FOR
4.5 mV BIAS
N.A. VERSION
EXPORT VERSION
230V A.C 50HZ LINE
BLUEGRN/YELBROWN
-21V -18V
ENCLOSE CIRCUITRY IS OFF-PCB.
ENCLOSE CIRCUITRY IS OFF-PCB.
CHASSIS CHASSIS
120V A.C 60HZ LINE
GREEN WHITEBLACK
GAIN = 6
5. ALL UNMARKED DIODES IN4148
will have a "R" suffix for
4. Reference with a "L" suffix
3.
0.1%
0.1%
0.1%
0.1%
MX2L
MX1L
4V RMS
the right channel amplifier.
TEST POINT
HEAT SINK
2. Q3 IS THERMALLY COUPLED TO
NOTES:
-0.58V
INPUT
150 WATTS @ 4R
25.4VRMS
+0.60V
-0.58V
-0.85V
+.67V
CONNECT TO M1085
AMP-REF.
CLP1
PREAMP PCB
4
3
2
1
4
8
U:\M1085V18.PRN

VCD
M1085-9.00
M1085-9.00
SOLDERSIDE M1085-9.00
M1085-9.00
BLANK SIZE=13.075" X 10.600"
USE 2 oz. COPPER
PCB MECH M1085-8.10
Q3
BC560
U2
TLO72
R8A
680K
"P22"
STYLE
TB7 RED_SEC2
XFMR
SW2
LIMITER
#3436
C6
2u2
63V
D7 4148
C8
100n
LD1
PWR_ON(GRN)
BE
Q1
+15V
MJF6388
JB2B
OUTPUT"B"
D6
IN4004
R5
1W
100R
C12B
16V 10u
U3
LM13600
P1A
25A
10K
#4390
CHANNEL"A"
Q3B
2N5638
JB1B
LINE_IN
C4
#5869
4700u
63V
BAR DOWN
D3
#6434
PX6A02
Q5B
BC560
Q4B
BC560
Q5A
BC560
Q2B
BC560
Q1B
BC550
Q4A
BC560
Q2A
BC560
Q1A
BC550
U1
TLO72
U6
TLO72
U7
TLO72
U4
5532
U5
TLO72
R7B
10K
R9A
1K
R3
2M2
R2
10K
R32B
1K
R10
1K5
R9
470R
R38A
1K
R7
15K
R615K
R1
2K2
R38B
1K
R23B
953R
R17B
10M
R20B
91K
R35A
1K5
J29
R8B
680K
R23A
953R
C23R
330u
25V
R33B
27K
R27B
10K
R17A
10M
R20A
91K
R21B
60K4_1%
R22B
133K1%
R34A
12K
R26B
20K0
R28B
180K
J20
R3B
9K760
R2B
953R
R1B
953R
R4B
9K760
R5B
9K760
R6B
9K760
J28
R31A
100K
R21A
60K4_1%
R22A
133K1%
R10A
100K
R16B20K0
J7
R24B
20K0
R25B
20K0
R30B
2K
R15B
22M
J19
R29A
10K
R36B
4K7
R14B
100R
R12B
27K
R19B
43K
R18B
91K
R9B1K
R8
470R
J18
J33
R32A
1K
D5A 4148
R24A
20K0
R16A
20K0
R30A
2K
R15A
22M
J17
R12A
27K
R19A
43K
R18A
91K
R11B
220K
R11A
220K
R39A
3K
R11
470R
R10B
100K
R6A
9K760
R5A
9K760
J15
R2A
953R
R1A
953R
R3A
9K760
ZD1
22V
R42L
10K
R42R
10K
J35
C2
5
SEE
TB5RED_SEC1
XFMR
TB6
YEL._C-TAP
XFMR
TB3
WHT_PRI
LINE-CORD
TB2
BLK_PRI
XFMR
TB4
WHT_PRI
XFMR
TB1
BLK_PRI
WIRE
SW1
HIGH-PASS-FILTER
#3436
C5
1u
63V
C10A
33u
16V
C13B
100u
25V
C13A
100u
25V
C11
22u
50V
C10B
33u 16V
C11B
33u 16V
D1B 4148
J21
D25R4148
R28A
180K
D3B 4148
J34
R27A
10K
D3A
4148
D25L4148
R36A 4K7
C10
100n
C9
100n
C21100n
C18
100n
C19
100n
C16
100n
C17
100n
C14
100n
J8
C13
100n
C12
100n
C7B
220n
C9B
220n
C7A
220n
C9A
220n
C5B
10p
C1B
1n
C2B
1n
C20
100n
C6B
47n
C8B
82n
C7100n
C5A
10p
C6A
47n
C8A
82n
C2A
1n
C1A
1n
LD4B
CLIP(RED)
LD4A
CLIP(RED)
LD3B
LIM.(YEL)
LD2B
SIG.(GRN)
LD3A
LIM.(YEL)
LD2A
SIG.(GRN)
BE
Q2
-15V
MJF6668
F2
T10A
10ASB
#3414 SEC1._FUSE
1
#3574
D5
IN4004
R4
1W
100R
C3B
16V
10u
C12A
16V 10u
C3A
16V 10u
Q3A
2N5638
JB1A
LINE_IN
C3
#5869
4700u
63V
BAR DOWN
D4
#6434
PX6A02
BAR DOWN
D2
#6434
PX6A02
BAR DOWN
D1
#6434
PX6A02
JB2A
OUTPUT"A"
C23L
330u
25V
#3593
V
T
R
GREEN
1
#3574
MX1.
CTRL-PCB.#3603
J1
J3
J4
J5
J6
J2
F3
T10A
10ASB
#3414 SEC2._FUSE
#3593
J13
250VAC
680N
J14
J23
J24
J12
J25
J31
J30
J32
1.
#3655
1
#3655
R7A
10K
D4B
4148
MX1
CTRL-PCB.#3603
D4A 4148
R29B
10K
R13B 18K
D2B 4148
J16
1
MX3A
#3574
J27
D2A
4148
ZD2
16V
ZD3
16V
J11
D11L
IN5402
R26A
20K0
R25A
20K0
R14A 100R
D1A
4148
R13A
18K
R33A
27K
1
MX2A
#3683
1
MX2B
#3683
J26
D5B
4148
RTV
V
T
R
D12L
IN5402
C11A
33u 16V
C22A
470p
RTV
BE
Q10L
MJE15031
#6897
R39B
3K
BE
Q8L
MJE15030
#6896
Q11L
#6988
MJL21194
Q9L
#6991
MJL21193
J2R
R36L
68R
D11R
IN5402
R15R750R
R3L 7K96 R4L 681R
R1L
4K12/0.1%
R26L
3K16
R51R33K
R23L
274R
R24L
33R2
R29L
33R
R19L
120R
R8AR
56K
R11L
12K
C7L
100u
25V
C6L
330u
25V
U2L 4N35
R31L
5W
0R15
R33L
5W
0R15
U1L MC33078
R27L
150R
L1L
#3819
5uH
R30L
2W
2K2
R37B
10K
R35L
2W
2K2
R38L
3R9
2W
R37L
10R
1W
R9L
BIAS
4K7
J5L
C11L
1n
C9L 100p
D27L
4148
C5L
100n
J3L
R40B
47K
D9L
16V
D8L
16V
D2L 4148
D1L 4148
D3L
BAT85
D7L
4148
D5L
4148
D6L
4148
R20L 274R
Q6LBC560
Q7L
BC550
Q1L
BC560
Q2L
BC550
D15L
4148
R45L
33R
D4L
BAT85
D13L
4148
Q5L
A56
Q4L
MPSA06
C8L
220n
C10L 10n
R4A
9K760
R43L
390R
R31B
100K
R8L
10K
R13L
390R
R46L10R
R5L
100K
D17L
4148
Q3L
A56
R8AL
56K
D6B
10V
R18R6K98
R12L
20K0
R40A
47K
J1L
J4L
R10L
390R
R15L
750R
R2L
37K90
TP3L
TP2L TP1L
C1L
33u 16V
C3L
2u2
63V
MX1L
PWR._SUP.&O/P(#3538)
C22B
470P
J7R
D7R
4148
J6R
V
T
R
R37A 10K
V
T
R
D6A
10V
RTV
1
MX3B
#3574
R35B
1K5
C4L
100n
C12L
1N2
MX1R
PWR._SUP.&O/P(#3538)
C3R
2u2
63V
C1R
33u 16V
TP1R
TP2R
TP3R
R2R
37K90
J1R
R10R
390R
J5R
RT1L
10K
R12R
20K0
P1B
25A
10K
#4390
CHANNEL"B"
Q3R
A56
R5R
100K
R13R 390R
R8R10K
C4R
100n
R34B
12K
C10R
10n
C8R
220n
Q4R
MPSA06
Q5R
A56
D17R
4148
D13R 4148
D4R
BAT85
D14R
4148
D16R
4148
D15R 4148
Q2R
BC550
Q1R
BC560
Q7R
BC550
Q6R
BC560
D10R
4148
D6R
4148
D5R
4148
D3R
BAT85
D1R
4148
D2R
4148
D8R
16V
D9R
16V
J24R
C5R
100n
D27R 4148
4148
C9R
100p
C11R
1n
R29R
33R
R9R
BIAS
4K7
R37R
10R
1W
R38R
3R9
2W
R35R
2W
2K2
R30R
2W
2K2
L1R
#3819
5uH
D12R
IN5402
U1R
MC33078
R33R
5W
0R15
R31R
5W
0R15
U2R
4N35
C6R
330u
25V
C7R
100u
25V
R28L 150R
R19R
120R
R11R
12K
R20R274R
J20R D30R
4148
U2AR
TLP62_
R26R
3K16
R1R
4K12/0.1%
R4R
681R
R3R
7K96
C1
CSA
4N7
R36R
68R
R25R
3K16
Q9R
#6991
MJL21193
Q11R
#6988
MJL21194
BE
Q8R
MJE15030
#6896
BE
Q10R
MJE15031
#6897
R43R 390R
D26R
4148
C2L
33p
RTV
U2LA
TLP62_
C2R
33p
V
T
R
V
T
R
#5989
#5989
V
T
R
V
T
R
C12R
1N2
R51L 33K
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
D JUN/17/05 APR/30/03 JUL/03/02 MAR/02/00 MAR/30/99 . FEB/24/99 JAN/26/99 AUG/14/97 . MAR/19/97 AUG/22/96 . APR/22/96 . NOV/20/95 OCT/23/95 . JUL/07/95
V 9.00 8.10 8.00 7.00 . . . 6.00 5.00 . 4.00 3.00 . 3.00 . 2.20 2.10 .
N REDO SOLDERMASK ADD_R8AL/R_FOR_BIAS_ADJUSTMENT PC#6227_MOVE_D16L,D17L,D14L PC#6211_FIX_ERROR_Q6R->Q15R R11R/L_15K->12K_PC#5982 Q15L/R,R50L/R,R51,R/L_D30L/R PC#5890_100K_THERMISTOR->10K_ADDED_ PC#5908_ADD_TLP621_(U2RA_U2LA) SPACE_ADDED_FOR_680N_CAP_C15->RADIA C15_RADIAL->AXIAL OUTPUT_TERMINALS_REPLACED_ MACPIN_UPDATED PC#5103 PC#4971 PC#4952 PC#4951 PC#4919
SR-300
M1085.PCB_DATABASE_HISTORY
C15100n
R47L
10R
D14L
4148
D16L
4148
R44L
33R
C13L
10n
R6L
100K
R14L
270R
R47R
10R
R46R
10R
R45R
33R
R44R
33R
R14R
270R
R6R 100K
C13R
10n
J2L
R18L6K98
R50R270K
Q15R
BC550
R21R33R2
D30L
4148
1-1+
BLKRED
FUNCTION
R50L 270K Q15L
BC550
R21L 33R2
RT1R
10K
R25L 3K16
D10L
4148
R23R
274R
R24R
33R2
R28R
150R
R27R
150R
CLP1"B"
O/P_R
O/P_R
I/P"A"
-45V
+45V
I/P"B"
CLP1R
O/P"A"
O/P"B"
CLP1"A"
AGND
AGND
V-
V-
SGND
SGND
V+
V+
CLP2L CLP1L
I/P"R"
O/PL
O/PL
I/P"L"
CLP2R
GND
GNDGND
REMOVE R8AL/R AS REQUIRED TO ADJUST B
I
NOTE 8
ASSEMBLY M1085-9.00
(TLP621) NOT BOTH
STUFF 4N35 U2R, U2L OR U2RA, U2LA
NOTE 7
NOTENOTE
SEESEE
POT P22
SCREW
8870
WASHER
3511
PCB
USE PART#5266 680N FOR EMC UNITS
NOTE 6
SPACER
SPACER
#8607
#8607
ECB
ECB
Q8L/R
Q10L/R
Q9L/R
Q11L/R
BLANK SIZE=13.075" X 10.600"
MOVE THERMISTOR ADD BATTERY BYPASS CIRCUIT
USE PART#6435 22N FOR N.A. UNITS
D14L, D16L D17L Q1L AND Q2L MOVED FOR RADIAL INSERTION
5
NOTE
SEE
FOR C2
NOTE 5
RETAPE TO ACCEPT 470N AC CAP PT#5243 FOR EMC UNITS
RIBBON MARK
RIBBON MARK
R19L/R 510R-->120R
PC#4850/4851 DELETE R7L/R,C13L/R. ADD D26L/R, D27L/R, R43L/R.
2.00
TUBING TO R22L/R
ALLOWED
NO SUBSTITUTION #6780 FOR Q3L/R
USE ONLY PART
NOTE 3A
NOTE 4
NEW SPACER
#3747
LED
NOTE 3
SOLDERING
BEFORE WAVE
ADD HEATSHRINK
NOTE 2
ENGINEERING NOTES
NOTE 1
TO MX3B
RIBBON CABLE
TO MXRA
RIBBON CABLE
R22L/R
THEABOVE
EXTEND
MUST NOT
TUBING
HEATSHRINK
THERMISTOR
SHEAR HERE AFTER BOARD TEST
DETAIL
MOUNTING
TRANSISTOR
SPACER
#8607
Q3L/R
C
BE
O/P
O/P
O/P O/P
V-
GND
V+
V-
GND
V+
#3528 #3528 #3498 #3498
VER:9.00
M1085-9.00
M1085-9.00
SR-300
M1085
RIGHT CHANNEL
LEFT CHANNEL
2-OZ COPPER
2-OZ COPPER
2-OZ COPPER 1
1
CLP2"B"
CLP2"A"
PCB MECH M1085-9.00
P:\1085V81.PRN

BC560
Q3
1/2
TLO72
U2
2
3
1
680K
R8A
10K
R7A
1K
R9A
OUT
IN
SW2
4 5 6
YORKVILLE NAME: PCB#&VER:
MODELS: SCH ISSUE:
TITLE:
DATE: DWG_1_OF_2
M1085
SR-300
M1085.SCH
OCT/08/99
INPUT/PREAMP
1.40
100n
C8
1K
R38B
1K5
R10
GREEN
LD1
470R
R9
16V
33U
C10B
OUT
IN
SW2
1 2 3
1K
R38A
100n
C10
15K
R7
100n
C9
16V
500mW
ZD3
16V
500mW
ZD2
MJF6388
Q1
15K
R6
MJF6668
Q2
1/2
TLO72
U2
6
5
7
16V
33U
C10A
YEL
LD3B
2K
R30B
100n
C21
100n
C18
100n
C19
100n
C16
100n
C17
100n
C14
100n
C15
100n
C13
100n
C12
D1B
D1A
1K5
R35B
953R
R23B
3K
R39B
10M
R17B
OUT
IN
H.P.F
SW1
4
5
6
91K
R20B
1K5
R35A
100K
R31A
680K
R8B
953R
R23A
BC550
Q1A
100R
1W
R5
100R
1W
R4
100K
R31B
220n
C7B
220n
C9B
12K
R34B
27K
R33B
10K
R27B
10M
R17A
OUT
IN
H.P.F
SW1
1
2
3
91K
R20A
220n
C7A
220n
C9A
60K4_1%
R21B 133K1%
R22B
CLP
RED
LD4B
12K
R34A
27K
R33A
20K0
R26B
180K
R28B
25V
100u
C13B
10u16V
C12B
PIN 11
D
IABC
1/2
LM13600
U3
13
15
14
16
12910
BC560
Q5B
10p
C5B
10K
R27A
9K760
R3B
1n
C1B
1/2
TLO72
U1
6
5
7
953R
R1B
953R
R2B
9K760
R4B
1n
C2B
9K760
R5B
9K760
R6B
CW
25A
10K
P1B
10u 16V
C3B
18K
R13B
10K
R29B
2N5638
Q3B
SRT
BAL.
INPUT
JB1B 1
2
3
4
5
6
100K
R10B
60K4_1%
R21A 133K1%
R22A
20K0
R16B
D2B
1N5240BRL
10V
D6B
1K
R32B
CLP
RED
LD4A
20K0
R24B
D4B
D3B
20K0
R25B
10K
R7B
BC550
Q1B
2K
R30A
20K0
R26A
180K
R28A
25V
100u
C13A
10u16V
C12A
10K
R37B
100R
R14B
100n
C20
27K
R12B
43K
R19B
91K
R18B
47n
C6B
82n
C8B
1K
R9B
100n
C7
GRN
LD2B
50V
22u
C11
1/2
TLO72
U6
6
5
7
1/2
TLO72
U5
6
5
7
4K7
R36B
470R
R8
470p
C22B
PIN 11
D
IABC
1/2
LM13600
U3
4
2
3
1
587
1/2
5532
U4
6
5
7
D5B
BC560
Q5A
1/2
TLO72
U7
6
5
7
10p
C5A
18K
R13A
10K
R29A
47K
R40B
47K
R40A
2N5638
Q3A
22M
R15B
20K0
R16A
D2A
1K
R32A
20K0
R24A
D4A
D3A
20KO
R25A
HEATSINK
HEATSINK
"P22"
STYLE
BC560
Q2B
10K
R37A
YEL
LD3A
100R
R14A
22M
R15A
27K
R12A
43K
R19A
91K
R18A
47n
C6A
82n
C8A
1/2
TLO72
U6
2
3
1
1/2
TLO72
U5
2
3
1
220K
R11B
220K
R11A
4K7
R36A
470R
R11
1/2
5532
U4
2
3
1
100K
R10A
D5A
SRT
BAL.
INPUT
JB1A 1
2
3
4
5
6
10u 16V
C3A
CW
25A
10K
P1A
9K760
R6A
9K760
R5A
1n
C2A
9K760
R4A
953R
R2A
953R
R1A
GRN
LD2A
1/2
TLO72
U1
2
3
1
1n
C1A
9K760
R3A
1/2
TLO72
U7
2
3
1
BC560
Q2A
33u16V
C11A
33u16V
C11B
BC560
Q4A
3K
R39
BC560
Q4B
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
# DESCRIPTION OF CHANGEVER#DATE
MODEL(S):-
D
D
D
D
D
D
D
OCT/08/99
MAR/31/99
NOV/24/95 V
V
V
V
V
V
V
V
1.40
1.30
1.20 N
N
N
N
N
N
N
N
HEATSINK_SYMBOL_ADDED
UPDATE_POTS
.
SR-300
M1085.SCH_DATABASE_HISTORY
1N5240BRL
10V
D6A
470p
C22A
DGS
2N5638
BC550C
CBE
BC560C
MJF6388
MJF6668
ECB
+55V
KIL
KIL
KIL
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND GND GND
GND
GND
GND
GND
GND
GND
GND
GND GND
GND
GND GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GNDGND
GND
GND
GND
GND
GND
GND
-15V
-15V -15V
-15V
-15V
-15V
-15V
-15V
I/P"A"
CLP1"A"
-55V
+15V
+15V
+15V
+15V
+15V
+15V
+15V
+15V
+15V
I/P"B"
REDREW OUTPUTS TO MATCH PWR AMP SCHEM.
(TO AMP "B")
(TO AMP "A")
-13V
-13V
4.5V
4.5V
OF AMPLIFIER
OF AMPLIFIER
TO INPUT
TO INPUT
POWER
OUTPUT
FOR FULL
1.4VRMS
CLP2"A"
4
4
3
3
2
2
1
1
CLP2"B"
POWER ON
CLP1"B"
SIGNAL
SIGNAL
LIMITER
(TO AMP "A"&"B")
ALL UNMARKED DIODES ARE IN4148
STEREO/
GOLD TIP&RING JACK
GOLD TIP&RING JACK
"B"
"A"
CHANNEL
CHANNEL
MONO
LIMITER
WILL WORK IN MONO
IS CONNECTED UNIT
IF EITHER INPUT JACK
NOTE:
PIN 1 PIN 1
A RIBBON CABLE
TO THE REAR PCB WITH
PCB WHICH IS CONNECTED
LOCATED ON THE FRONT
THE DOTTED LINE ARE
COMPONENTS INSIDE
LIMITER LIMITER
U:\SR300IP2.PRN

T
T
N
L
B LA C K D B L/IN S
14" B LAC K DBL /INS
17 " W H IT E D B L /I NS
W H IT E D B L /IN S
W H IT E D B L /IN S
G R N/Y E L L
S R -300E AC W IR ING
V E R S IO N 1. 30
F E B 02, 99
19 1/2" W HIT E
4 1/2" B LAC K
1248E
R E D DBL/INS