U.S.A.
Yorkville Sound Inc.
4625 Witmer Industrial Estate
Niagara Falls, New York
14305 USA
Voice: (716) 297-2920
Fax: (716) 297-3689
WORLD HEADQUARTERS
WEB ACCESS: http://www.yorkville.com
CANADA
Yorkville Sound
550 Granite Court
Pickering, Ontario
L1W-3Y8 CANADA
Voice: (905) 837-8481
Fax: (905) 837-8746
Quality and Innovation Since 1963
Printed in Canada
SERVICE MANUAL
NX250P
TYPE: YS1030
Manual-Service-NX250P-1v00.pdf
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.
1 2 34
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A4
Date: 24-Dec-2003 Sheet of
File: D:\LYM\YORKVILLE\20031219-200FA.ddbDrawn By:
R10
1.2K
R5
1.2K
R2
330
R1
330
2
3
1
4
S3
OUT
2
3
1
5
6
4
S2
LINE IN
2
3
1
4
S1
MIC IN
C2
22P
D2
15V
D4
15V
D1
15V
D3
15V
R4
330
R3
330
D6
15V
D8
15V
D5
15V
D7
15V
C3
22P
1
2
3
4
5
6
7
8
9
CN1
R6
10R/0.5W
R11
10K
C1
0.01U/400V
1 2
3
SW1
1
2
S4
1
2
3
4
CN2
TR1
BC550C
C4
0.1U/400V
-15V G
R
K
DL1
SINGL/COMP
TR2
BC559C
R12
10K
R7
1K
R13
10K
R8
2.7K
DL2
POWER
R9
2.7K
-15V
1U/50V
C5
P-200FAPRE
1 2 34
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A4
Date: 24-Dec-2003 Sheet of
File: D:\LYM\YORKVILLE\20031219-200FA.ddbDrawn By:
1
2
3
4
5
6
7
8
9
CN2
12
13
14
IC2D
TL074CN
C6
22P
R26
15K
R25
330
R27
2.2K
VR5
C10K
R28
1K
C21
22P
10
9
8
IC2C
TL074CN
R22
15K
R23
15K
R21
4.7K
C20
22P
R29
15K
R24
15K
C11
22P
3
2
1
IC1A
TL072CN
R18
10K
C16
22P
C17
10U/50V NP
R17
4.7K
R16
4.7K
R13
4.7K
C10
0.33U/63V
5
6
7
IC2B
TL074CN
R20
4.7K
C19
22P
R19
1.5K
C1
10U/50V NP
VR1
B5K
R14
22K
R15
22K
R4
4.7K
C2
22P
12
34
DL1 VTL5C4
TR1
BC559C
R1
330
C3
10U/50V NP
R10
4.7K
R7
2.7K
R5
10K
VR4
B10K
VR3
B10K
VR2
B10K
R11
4.7K
R9
2.7K
R6
10K
C5
0.0068U/100V
C4
0.047U/63V
C7
0.0056U/63V
C9
0.018U/63V
R8
10K
R12
12K
C8
22P
R30
10K
R2
330
1
2
3
4
5
6
7
8
9
10
11
12
CN1
+15V
-15V
C13
10U/50V
C12
10U/50V
C14
0.1U/50V
C15
0.1U/50V
C18
0.1U/50V
C22
0.1U/50V
411
IC2E
TL074CN
84
IC1C
TL072CN
+15V
-15V
VOL
P-200FATONE
MID
HIGH
LOW
MIC GAIN
5
6
7
IC1B
TL072CN
3
2
1
IC2A
TL074CN
R3
1.5K
Yorkville Revisions
Date
• 4 ohm speaker used
REV
Jan 20/04 1.0
Feb 20/04 1.1
Feb 23/04 1.2
Production Notes
1
2
4
3
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6
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0.0
3
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5
1
5
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6
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B4CI
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C4
7
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3
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0
1
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2
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8
1
6
2
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2
2
3
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1
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1
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N
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270
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3
2
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70
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6
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NC2
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V05/U1.0
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5
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2
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63
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UN
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5
1
-
5
3
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4N74N7
22K22K
47N47N
47N47N
(jumper)(jumper)
5k15k1
4k74k7
360R360R
xxxxxxxxxxxxx
xxxxxxxxxxxxx
xxxxxxxxxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
1 2 3 4
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Title
Number RevisionSize
D
Date: 24-Dec-2003 Sheet of
File: D:\LYM\YORKVILLE\20031219-200FA.ddbDrawn By:
1
2
3
4
5
CN2
D31
BP25-06PWS
D30
KBU-806
C57
0.01U/400V
C60
0.01U/400V
D33
1N4002
D32
1N4002
C52
4700U/80V
C53
4700U/80V
C46
4700/50V
C47
4700U/50V
C5
10U/50V
C29
10U/50V
Vin
2
GND
1
Vout
3
IC4
LM337SP
Vin
3
GND
1
Vout
2
IC3
LM317T
R6
2.7K
R20
2.7K
R5
220
R21
220
C10
10U/50V
C30
10U/50V
C11
10U/50V
C23
10U/50V
C6
0.1U/50V
C28
0.1U/50V
C12
0.1U/50V
C22
0.1U/50V
74
IC2C
TL071CN
84
IC5C
TL072CN
C25
0.1U/50V
C34
0.1U/50V
C3
0.1U/50V
C1
0.1U/50V
R72
390
R66
1K
R39
68K
R36
4.7K
R35
12K
R23
470
R41
820
R40
68/0.25W
R59
12K/0.25W
R58
8.2K/0.25W
R62
8.2K//0.25W
R63
47/0.25W
R69
47K/0.25W
R71
2.2K/0.25W
R70
1K
R42
12K
R44
470
R46
12K
R38
820
R43
1.5K
R60
8.2K/0.25W
R61
47/0.25W
R56
8.2K/0.25W
R57
12K/0.25W
R27
68/0.25W
R37
820
R28
68K
R25
12K
R24
4.7K
R73
390
R51
470
R65
2.2K/0.25W
R64
47K/0.25W
C36
220P
C50
470P
C49
470P
C51
0.0047U/100V
C37
100P
C39
0.001U
C54
0.0047U/100V
C35
100P
TR6
MJE350
TR3
MJE350
TR2
MJE340
TR10
MJE340
TR1
2N5401
TR4
2N5551
D25
1N4002
TR5
MJE802P
R67
8.2K/2W
D27
7.5V/1W
D26
7.5V/1W
C45
220U/25V
D22
1N4002
D20
1N4002
D19
1N4002
D21
1N4002
VR1
500
C33
10/50V
TR14
MJE340
TR16
MJE15031
TR18
TIP36C
TR9
MJE15030
TR12
2SC5200
R52
10/0.25W
R45
4.7/0.5W
D15
1N4002
D28
1N4002
D23
6A2
C32 0.1U/50V
TR15
MJE350
TR11
MJE15031
TR17
MJE15030
TR13
2SA1943-O
TR19
TIP35C
D29
1N4002
D24
6A2
C44
0.0047U/400V
R68
8.2K/2W
C48
220U/25V
R53
0.2/5W
R54
0.2/5W
C38
220P
D7
1N4148
D4
1N4148
R55
10/0.25W
R50
4.7/0.5W
C43
0.0047U/400V
+VCC1
-VCC1
+VCC2
-VCC2
+VCC2
-VCC2
+VCC1
-VCC2
R75
47K
R74
4.7K
R78
10K
R84
47K
D12
1N4002
TR24
BC550
TR20
BC550
TR25
BC550
TR22
BC560
TR23
BC560
TR8
BC327-25
TR21
BC560
C58
1000U/6.3V
C59
220U/25V
R77
330
R49
10K
R76
33K
R80
10K
R83
10K
R81
10K
R47
150/0.25W
R79
10K
R82
150K
C61
1U/50V
C42
0.1U/50V
LOW OUT
D8
1N4148
TR7
BC560
R48
10K
-15V
-15V
+15V
RL1A
24V/16A
RL1C
24V/16A
1
2
3
4
5
6
7
8
9
10
11
12
CN1
5
6
7
IC5B
TL072CN
3
2
1
IC5A
TL072CN
D6
1N4148
D5
1N4148
R22
1K
R32
10K
R34
10K
R33
1K
R26
2.7K
R29
100K
C31
33P
R31
1K
R30
1K
R18
47K
C24
0.0047U/100V
C14
10U/50V NP
C15
10U/50V NP
C26
22P
+15V
-15V
t
R17
PTC/330
-15V
+15V
D11
1N4002
C41
47U/100V
D14
1N4002
D17
1N4002
D15
1N4002
D16
1N4002
D10
6A2
D13
6A2
C55
0.1U/250V
C56
0.1U/250V
D9
1N4002
C40
47U/100V
LOW OUT
OUT
3
2
6
IC2A
TL071CN
D2
1N4148
D3
1N4148
R2
10K
R1
10K
R3
33K
R7
33K
R10
15K
C2
22P
MUTE
ST-BY
1
2
3
4
5
6
78
9
10
11
12
13
14
15
IC1
TDA7294
R4
1K
R11
22K
R8
680
R12
1K
R16
22K
R9
10K
C13
1U/50V NP
R15
33K
R14
10K
D1
1N4148
C4
82P
C18
10U/50V
R13
22K
C8
22U/50V
R19
10/0.5W
C17
0.1U/100V
C27
100U/50V
C19
1U/25V
C20
1U/25V
C21
100U/50V
HI OUT
C7
22U/50V
C9
10U/50V
+VCC1
-VCC1
+15V
-15V
P-SP200AMP
220R
1N
PRODUCTION NOTES
1. Tack on #4977 220R and
#5422 1N 50V bead cap to
J1, J3 jumpers of IC1 TDA7294
J1
J3
220R 1N
pin 2
of
TDA7294
pin 3
of
TDA7294
2. Heatshrink the 220R and 1N
together and RTV into place
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
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