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Yorkville

SERVICE MANUAL

WORLD HEADQUARTERS CANADA Yorkville Sound
550 Granite Court Pickering, Ontario L1W-3Y8 CANADA Voice: (905) 837-8481 Fax: (905) 837-8746

U.S.A. Yorkville Sound Inc.
4625 Witmer Industrial Estate Niagara Falls, New York 14305 USA Voice: (716) 297-2920 Fax: (716) 297-3689

EP378
PROFESSIONAL BALANCED SOUND PROCESSING SYSTEM

Quality and Innovation Since 1963
Printed in Canada

Manual-Service-ep378 Oct20/2000

IMPORTANT SAFETY INSTRUCTIONS
YS No. 5990 5991 6438 6825 6822 5106 6774 6926 6840 6882 6889 5417 5413 5425 5205 5226 5228 5229 5231 5233 5234 5267 5630 4518 3489 3602 3682 3498 3414 2435 3827 8661 8706 3461 3826 5989 8800 4599 5299 4973 4896 4637 4811 4852 4855 4873 4823 4802 4808 4847 6124 4774 4639 6128 4870 4801 4810 4762 6116 4856 4901 4830 4784 4885 4832 4902 4890 4941 4840 4895 4835 4760 4838 6120 4844 3616 9005 9020 9640 8801

EP378 Parts List 9/30/98
Description GREEN 3MM LED 1V7 20MA RAD W/STOPER RED 3MM LED 1V9 20MA RAD W/STOPER 1N4004 400V 1A0 DIODE T&R 1N4148 75V 0A45 DIODE T&R 1N4745A 16V0 1W0 ZENER 5% T&R MPSA63 TO92 PNP DARLINGTONT&R BD139 TO126 NPN TRANS BD140 TO126 PNP TRANS. MC33078P IC DUAL OP AMP TL072CP IC FET DUAL OP AMP TLO74CN IC QUAD O/A TEXASI ONLY 330P 50V 10%CAP T&R BEAD NPO 390P 50V 10%CAP T&R BEAD NPO __1N8 50V 10%CAP T&R BEAD X7R _15N 100V 10%CAP T&R RADIAL.2"FILM _68N 100V 5%CAP T&R RADIAL.2"FILM 100N 100V 5%CAP T&R RADIAL.2"FILM 150N 63V 10%CAP T&R RADIAL.2"FILM 220N 63V 10%CAP T&R RADIAL.2"FILM 330N 63V 5%CAP T&R RADIAL.2"FILM 470N 63V 10%CAP T&R RADIAL.2"FILM 100U 25V 20%CAP T&R RADIAL ELE.2" 330U 25V 20%CAP RADIAL ELECT BULK _10K STEREO/LINEAR HORIZ 12MM CLIP 250X032 18-22AWG DISCO/INSL RING TERMINAL 18AWG WIRE & #8 SCREW 250 MALE PCB TAB BULK ON CATRIGE M203-02 PLAIN PC MNT JK SKT INTERNATIONAL PC MOUNT FUSEHOLDER 0.100 AMP SLO-BLO .25X1.25 FUSE SQUARE BUMPER BUTTON BLACK BUTTON KNOB FLAT GREY ROTARY KNOB BLACK W/BLUE POINTER 8? 3/18 SVT AC LINE CORD HEYCO #1150 STRAIN RELIEF 4 CIR CABLE HOLDER .098 6-32 KEPS NUT ZINC 22AWG SOLID SC WIR T&R 24AWG SOLID SC WIR RAD 1.0W 1R 5%FLAME PROOF T&R RES 1/4W 15R 5% T&R RES 1/8W 68R 5% T&R RES 1/4W 68R 5% T&R RES 1/4W 100R 5% T&R RES 1/4W 330R 5% T&R RES 1/4W 680R 5% T&R RES 1/4W 1K 5% T&R RES 1/4W 1K21 1% T&R RES 1/4W 2K 5% T&R RES 1/4W 2K2 5% T&R RES 1/4W 3K 5%MINI T&R RES 1/4W 4K12 1% T&R RES 1/4W 4K99 1% T&R RES 1/4W 4K99 1%MINI MF T&R RES 1/4W 6K2 5% T&R RES 1/4W 6K98 1% T&R RES 1/4W 9K1 5% T&R RES 1/4W 9K760 0.1% *** T&R RES 1/4W 10K0 1%MINI MF T&R RES 1/4W 12K 5% T&R RES 1/4W 13K 5% T&R RES 1/4W 15K 5% T&R RES 1/4W 17K40 0.1% *** T&R RES 1/4W 20K 5% T&R RES 1/4W 22K 5% T&R RES 1/4W 24K 5% T&R RES 1/4W 30K 5% T&R RES 1/4W 30K 5% .2"U T&R RES 1/4W 33K 5% T&R RES 1/4W 51K 5% T&R RES 1/4W 56K 5% T&R RES 1/4W 75K 5% T&R RES 1/4W 100K 5% T&R RES 1/4W 100K 5%MINI T&R RES 1/4W 1M 5% T&R RES 13" 8C-26AWG RIBBON CABLE 2.5MM 20GA COLD ROLLED STEEL 4X8? SHEET 18GA COLD ROLLED STEEL 4X8 SHEET .025" FISHPAPER ( FLAT 48" SHEETS ) 6-32 X 3/8 PAN PH TAPTITE SJ500 Qty. 1 2 4 10 2 2 1 1 2 12 2 4 12 4 12 4 24 4 8 8 4 4 2 2 2 1 2 8 2 1 3 4 2 1 1 2 1 63 2 2 2 1 11 6 12 12 2 4 6 3 4 4 4 4 4 4 2 8 30 4 2 2 2 4 2 6 1 1 2 4 2 2 5 1 4 0.5 0.7 1.741 0.52 1 YS No. 8829 8809 8905 3517 8491 3436 1242 Description 6-32 X 3/8 FLAT PH TAPTITE BO#4 HEA 10-32 X 1/4 PAN PH TAPTITE SJ500 YORKVILLE PRODUCT SCHEMATIC NYLON WASHER #8 0.062 #10 SPLIT LOCK WASHER BO DPDT PUSH SW PCMT H BREAK B4 MAKE PROCESSOR PC MOUNT CE 220/125V XFMR Qty. 14 2 1 1 2 4 1

INSTRUCTIONS PERTAINING TO A RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS.
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE.

INSTRUCTIONS RELATIVES AU RISQUE DE FEU, CHOC ÉLECTRIQUE, OU BLESSURES AUX PERSONNES.
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.

CAUTION:

AVIS:

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

CONSULTEZ UN TECHNICIEN QUALIFIE POUR L'ENTRETIENT.

Read Instructions: Packaging: Warning:

The Owner's Manual should be read and understood before operation of your unit. Please, save these instructions for future reference. Keep the box and packaging materials, in case the unit needs to be returned for service. When using electric products, basic precautions should always be followed, including the following:

Veuillez lire le manuel: Emballage: Warning:

Il contient des informations qui devraient êtres comprises avant l'opération de votre appareil. Conservez S.V.P. ces instructions pour consultations ultérieures 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:

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.

Alimentation:

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. No naked flame sources, such as lighted candles, should be placed on the apparatus.

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.

Hazard:

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.

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. 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.

Service:

Cordon d'alimentation: Service:

The unit should be serviced only by qualified service personnel.

Évitez d'endommager le cordon d'alimentation. N'UTILISEZ PAS L'APPAREIL si le cordon d'alimentation est endommagé. Consultez un technicien qualifié pour l'entretien de votre appareil.

SAFE_V4.doc Version 4.0 02/11/99 11:54 AM

4148

4148

D6A

6 22N C42A GND 22N C44A GND

20K R50A GND 10K R56 220N C54 330N C55 12 24K 13 R57 TLO74
1/4

D5A

4K12

FREQ. 10K CW D A P1A

12K

1/2 TLO72

4K12

FREQ. 10K CW D A P1A

U:\M560 1.PRN

22K 10K0 R12A TLO72
1/2

R32A 4K99 6K98 R13A 7 5 6 9K1 R14A 6K2 R15A TLO72
1/2

HIGH PASS
3

R28A 4K99 2 1 3 U2A
1/2

1K21/1% IG JB1A 1 CH1
S

9K76/0.1% R3A 390p 2

9K76/0.1% R5A 1 3 U1A
1/2

GND 4K990 R9A

5 15N C3A 6

U1A

U2A

PLAY_BACK/VOICE
IN OUT

7
2 1

15N C6A R27A

1N8 C8A 100K R22A -V
RED

24K R30A 6 7 5 1 75K R24A GND U4A
1/2

680R R37A 10K0 10K0 R34A 2 3 R35A 1 U4A
1/2

HORN CH1_OUTPUT 6
T

330R 15n C17A R38A 100R R39A 330R R40A 68R R41A 68R R42A 680R R43A IG

4
R

2
S

R1A

17K40_0.1% R11A 15N C4A 4K990 R10A

S2 33K R7A 13K R20A GND

TLO72

51K R31A 6K98 R21A R18A GND

1N8 C10A

2 3 U3A
1/2

3
R

5
T

C1A 390p R2A 1K21/1% IG C2A R4A 9K76/0.1%

TLO72 10K0 R33A GND

5

3

1 JB2A

TLO72 10K0 R36A

TLO72 R6A 9K76/0.1%

33078

INPUT 2

4

6

GND BAND-PASS CENTERED AT 2KHZ

GND

LD2A GND 1K GND CLIP CIRCUIT

IG

GND GND 4148 D7A 100K R16A 15K

390p C16A C12A 330P 100K 6 7 56K R26A 5 U8A
1/2

**NOTE** ONLY CHAN A IS SHOWN CHAN B IS IDENTICAL ACCEPT OP-AMP PINS REVERSED.

MPSA63 Q1A 4148 D3A GND

3.5K AND 16K NOTCHES 390p C9A

GND

TLO72

R17A D4A 4148

R25A 51K

C11A 330P 6K2 R29A

6 5

R23A 7 U3A
1/2

GND 680R R71A 10K0 10K0 2 3 R66A 1 10K0 U8A
1/2

33078

100N C41A LOW PASS 2K R45A 3K R46A 3 2 TLO72
1/2

100N C43A

3K R49A 3K TLO74
1/4

330R 15n C58A R67A 100R R68A 68R R74A

6
T

4
R

2 MID/FULL_RANGE
S

GND TLO74
1/4

GND

R65A

CH1_OUTPUT

LOW PASS 2K 1 R47A 3K R48A 5 TLO72
1/2

3 IN 2 OUT 1

220N C45A

HIGH PASS 150N C46A 220N 1 C47A 150N C48A 3 2

R52A HIGH PASS

5

3

1 JB3A

R64A 7

TLO72 IG 10K0 R69A 390p C60A GND 330R R70A 68R R73A 680R R72A IG

U6A

U5A

U5A

S1 7

FULL_RANGE/BI_AMP

5 20K R51A 6

U6A

GND

SUB_IN
GND
3 IN 2 OUT 1

S3A 680R

10K 220N 14 C49A 330N C50A 24K R54A R53A TLO74
1/4

U6A

FULL_RANGE
8 R84A 2K 10K0 HP WITH 6dB BOOST AT 35Hz R93A 10K0 10K0 R94A 2 C35A 470N
(4=V-,8V+)

R98A 330R 15n 7 5 U11A
1/2

SUBWOOFER CH1_OUTPUT 6
T

10 9

U6A

4
R

2
S

6

R97A

R99A 100R R100A 68R R101A

C39A

5

3

1 JB4A IG

LOW PASS C21A 330N R78A R79A 2 3
(4=V-,8V+)

GND HIGH PASS WITH LOW Q AT LOW CUT-OFF C33A 330N LOW PASS R81A R82A 12K 6 5
(4=V-,8V+)

TLO72 10K0 330R R96A 68R R102A 680R R103A IG

GND

1 3 U10A 1/2 TLO72 GND 390p C40A 30K R85A GND

R95A

1 U9A

7 U9A 1/2 TLO72 1W 1R R6 C5 25V 100uF

C34A 470N

VARIABLE LOWPASS FILTER

1M

R80A C20A 68N

VARIABLE LOWPASS FILTER 1M

R83A C32A 68N +15V

GND +V 0.1A D1 1N4004 A
2
XF1

15R R2 2K2 R3 C1 25V 100uF 16V 1W ZD1 16V 1W ZD2 C3 25V 330U GND C2 25V 100uF R5 2K2 R4 15R C4 25V 330U Q1 BD139

+15V

GND GND BYPASS CAPS ARE CONNECTED ACROSS I.C SUPPLIES. 100n C22A 100n C24A 100n C26A 100n C28A 100n C30A GND 100n C23A 100n C25A 100n C27A 100n C29A 100n C31A 100n C22B 100n C24B 100n C28B 100n C30B 100n C23B 100n C25B 100n C27B 100n C29B C26B 100n GND GND

8

1N4004 GND D2 1N4004 D3 D4 1N4004

V+

V- V+

V-

C6 25V 100uF

R1 2K2 LD1
GREEN

TRANSFORMER #1238 PC MOUNT 220VAC OPERATION D = AC NEUTRAL B + C ARE JOINED A = AC LINE TRANSFORMER #1238 PC MOUNT 120VAC OPERATION B + D TO AC NEUTRAL A + C TO AC LINE

F1

B1 C4
3

7 5

D

XF1 60HZ #1242 120VAC

BD140 Q2

-15V

R7 -15V 1R 1W -V

NOTE: ALL UNMARKED DIODES ARE IN4148 ALL SWITCHES ARE MAKE BEFORE BREAK, #3436
DATE: JUNE/01/98 YORKVILLE NAME: ELITE.SCH MODELS: PCB#&VER: ELITE_PROCESSOR_EP378 M560_V1.00 SCH ISSUE: TITLE: ELITE P1

SHEAR
R95A

10K0
R96A R99A R98A R84A R97A R100A

R101A

C39A D5A R94A C40A

M560 EP378

15n

VER.1.00
100n 100n
C27A C49A C50A

U11A

R93A

R102A

10K0 10K0 100R 2K 680R 330R 330R 68R 68R
4148

390P 10K0

SUBA_OUTPUT TL072 220N
C55 J1A

330N 330N
R53A

C26A

C34A

680R
C54 R103A R79A R82A R56

470N 30K 220N 10K
R57 R54A C32A C44A R85A C35A

470N

JB4A
WIPA

12K
R48A C43A

BOTA

68N 3K

100N

22N

BOTB

#4518

C33A

1A
WIPB

330N 12K 4K12
R81A

10K/STEREO 10K 24K 24K
J7A
TOPB TOPA

P1A
J6A

VCD
330N
J2A J3A J4A J8A

TL072 1M 2K
U6A U5A

TL072

TL074

U9A (4=V-,8V+)

R72A R45A

S3A
C21A R47A C42A

#3436 BRIDGE
R46A

68N
R83A

R51A R50A C46A

JB3A
C20A C45A

20K 20K 220N 3K
R49A C47A D7A

22N

680R 2K 3K
R78A C41A R80A

4K12

1M

150N

3K
C48A

R52A

100N
R65A J11A

220N

150N

C28A

4148

100n
C29A D6A

WOOFERA_OUTPUT
J26A J12A

10K0 680R TL072
R64A

R71A

4148
J10A

100n
J9A J27A R16A

10K0

68R
U8A R73A R74A

100K

68R
R66A

100n 100n 390P
C60

D

C25A C24A

R69A

R17A

10K0 15n
C58A

15K
Q1A C9A R34A

R68A R67A

10K0 100R 330R 330R
R70A U4A

1K
R18A

MPSA63
R30A R32A D3A

HORNA_OUTPUT TL072
R41A C17A

390P 24K 10K0 22K
J17A R35A

4148 4148

D4A J13A J14A C11A

68R
R42A

15n
R39A R33A C16A

JB2A 68R 680R
R43A R38A R37A R40A

10K0 10K0 390P 10K0 100R 330R 680R 330R
R36A

330P 330P 75K 56K
C12A

51K 6K2

51K 6K98

JB1A 100n
C31A

100K
J18A R23A R31A R29A R25A R21A

JB4
U1A

R10A

R24A

R26A C3A

4K990 17K40
R11A

U3A

15N 15N TL072
R2A J21A

33078
C4A J19A

J15A

R22A

100K
C10A

CHANNELA_INPUT 390P
J22B R1A R3A

1N8 1N8

R13A C30A

R 100n R9A
R6A R4A

CLIP_B RED

LD2B

R12A

C8A J25A R15A R14A R5A C2A R7A

9K760 1K21 9K760

390P 9K760 9K760

1K21
J22A C1A

6K98 4K990 10K0 6K2 9K1
U2A

LD2A

C22A

33K
J23A

C23A

CLIP_A RED

100n

TL072 390P DNS
R19A C5A
R28A

R 100n 15N PLAY/LIVE S2
J24A J30B J1 J33A -V +V

#3436

C6A
R27A

4K99 4K99 13K
R20A

2K2
GND

J6

J5

J34B

S1
R1B

C1B

#3436 1K21

FULLRANGE/BI-AMP
R7B

C5B

C6B

R27B

1

FUNCTION PART#

15N DNS 33K
J23B R19B U2B

4K99 4K99
R28B

J4

TL072
R14B R15B

GND

POWER GREEN

13K
R20B R31B

G LD1 1K21
R3B

9K760

390P 9K760 9K760 9K760

100n JB1B
C30B

R12B R9B R21B J19B R2B C2B R5B R4B R6B R13B C10B

9K1 6K2 10K0 4K990 6K98 JB4 1N8
C4B U1B J29B J21B C8B R24B R26B

51K 6K98
J16B J31B J3

1N8 TL072 100K 15N 15N
C3B R11B R10B C31B R40B R33B C16B R22B C23B J15B

J32B C22B

100n 17K40 4K990 100n
R43B R37B R38B

100n 33078
U3B R29B

J2
PART#

100K

CHANNELB_INPUT 680R 68R JB2B
R42B

R36B R35B J17B R39B R30B

56K 75K

FUNCTION

C11B R23B

6K2 51K
R25B J13B C12B J14B

1

330P 330P 22K 68R
R41B R32B C9B D3B

330R 680R 330R 100R 15n
C17B

390P 10K0 10K0 10K0

MPSA63
Q1B

1K
R18B

390P 24K 10K0 TL072
U4B R34B D4B C50B C55 C49B

4148 4148

330N 330N
R70B C58B

220N 220N 10K 100n 100n 15n
R67B R68B R53B R57 C24B C25B R66B R73B R74B R71B R65B R54B U6B

15K 100K
R56 C54 R16B

R17B

4148

D7B

2K 10K 24K 24K 10K0
U8B R69B C60 J7B J8B C41B

R45B C42B

HORNB_OUTPUT 680R
R72B

100N 3K
R47B

330R 330R 100R 10K0

22N
R46B

390P 10K0 TL072 10K0 680R 68R 68R
R78B R51B R64B J6B J5B J10B J11B C46B R52B J4B

TL074

J12B

2K

TL072 20K
R50B J9B

3K 3K 4K12
4148
D6B

R48B

U5B

20K 3K
R49B C44B C45B

100N
C43B C28B

WOOFERB_OUTPUT JB3B #3436
C21B
WIPA

150N
C20B C48B

220N 68N
R79B

22N
C47B

100n
C29B

100n 12K
R80B

150N

220N

J7

1M

J3B C26B

J2B

100n

4148

BRIDGE S3B P1B JB4B SUBB_OUTPUT
"020. "210. "800. "500. 1A

TL072
U9B

C27B

D5B

C33B (4=V-,8V+)

100n

330N

4K12
R81B R82B
BOTA WIPB

330N
C34B

1M
R83B

R7 1R 1WATT

1WATT 1R R6

C32B

470N 12K
BOTB TOPB

470N
R84B #4518 C39B C35B

68N 2K
R93B

C5 100uF 25V

C6 100uF 25V

30K

ZD1

ZD2

10K/STEREO

R85B U11B

C40B

15n

METAL

METAL

TOPA

16V
J1B R100B

16V

390P 10K0 TL072 680R
R103B R94B

10K0 10K0R97B 680RR98B 330RR99B 100R 68R 68R
R101B R102B

Q2

C2 100uF 25V

330U 25V

Q1

BD139 330R
R96B

BD140 10K0
R95B

C4 R4 330U 25V

100uF C1 25V C3 R3 2K2 15R R2 1N4004 D3 D4
1N4004

R5 2K2 15R

J8 J9

D1 D2

5
XF1 CUT J10 FOR N.A. CUT J11 & J12 FOR EUROPEAN. TAB2 NEUTRAL/WHITE J12 TAB1 CE-T0.1A/230Vac CSA-0.1ASB/120Vac F1 J11 J10

6

7

8
1N4004 1N4004

120VAC

GUIDE ETCH

ASSEMBLY PCB MECH

LINE/BLACK

60HZ XXVA

1

2

3

4

M560-1.00 M560-1.00

SHEAR

00.1-065M EDISREDLOS