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SERVICE MANUAL
K4
MODEL TYPE: YS1045
WEB ACCESS: http://www.yorkville.com
WORLD HEADQUARTERS
CANADA
U.S.A.
Yorkville Sound
Yorkville Sound Inc.
550 Granite Court
4625 Witmer Industrial Estate
Pickering, Ontario
Niagara Falls, New York
L1W-3Y8 CANADA
14305 USA
Voice: (905) 837-8481
Voice: (716) 297-2920
Fax: (905) 837-8746
Fax: (716) 297-3689
Quality and Innovation Since 1963
Printed in Canada
Manual-Service-K4-00-1v3.pdf
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Summary of Contents for YORKVILLE K4 - MANUAL SERVICE
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Page 1: Service Manual
SERVICE MANUAL MODEL TYPE: YS1045 WEB ACCESS: http://www.yorkville.com WORLD HEADQUARTERS CANADA U.S.A. Yorkville Sound Yorkville Sound Inc. 550 Granite Court 4625 Witmer Industrial Estate Pickering, Ontario Niagara Falls, New York L1W-3Y8 CANADA 14305 USA Voice: (905) 837-8481 Voice: (716) 297-2920 Fax: (905) 837-8746 Fax: (716) 297-3689 Quality and Innovation Since 1963... -
Page 2: Important Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS INSTRUCTIONS PERTAINING TO A INSTRUCTIONS RELATIVES AU RISQUE RISK OF FIRE, ELECTRIC SHOCK, DE FEU, CHOC ÉLECTRIQUE, OU OR INJURY TO PERSONS BLESSURES AUX PERSONNES CAUTION: AVIS: AFIN DE REDUIRE LES RISQUE DE CHOC ELECTRIQUE, TO REDUCE THE RISK OF ELECTRIC SHOCK, DO N’ENLEVEZ PAS LE COUVERT (OU LE PANNEAU ARRIERE) NOT REMOVE COVER (OR BACK). - Page 3 K4 Parts List 5/18/2006 YS # Description Qty. YS # Description Qty. YS # Description Qty. YS # Description Qty. 6554 BLUE 3MM LED 3V9 20MA TLHB440VISHAY 5281 _10U 16V 20%CAP T&R RAD .2"NP 2011 1/4W 11R3 1%FLAME PROOF T&R RES 8741 4-40 X 1/2 PAN PH MS JS500 6405 RED 3MM LED 1V7 5MA 5282 _10U 16V 20%CAP T&R 5X7MM .2"NP...
- Page 4 MODEL TYPE: YS1045 Keymaster K4 Block Diagram for D E S I G N E D & M A N U FA C T U R E D B Y Y O R K V I L L E S O U N D Tube Gain Trim L Lead Gain L Tube/Solid State...
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Page 5: Service Bulletin
SERVICE BULLETIN K4 Pre-amp Tube Replacement The Two 12AX7A/7025A tubes are inside the chassis. To remove the chassis from the cabinet follow these instructions. 1. Unplug all connections. Make sure the K4 is unplugged from the AC main line and remove all instrument and other cable connections. - Page 6 SERVICE BULLETIN Remplacement des Lampes Pour le Préamplificateur K4 Les deux lampes 12AX7A/7025A sont à l’intérieur du châssis. Pour retirer le châssis de l’enceinte suivez les instructions ci-dessous. 1. Débranchez toutes les connexions. Assurez-vous que le K4 est débranché du circuit CA et débranchez tous les autres câbles incluant les instruments.
- Page 7 SERVICE BULLETIN January 29, 2009 The K4 is a powerful 300-Watt compact and light-weight combo amplifier for keyboards. The product houses 5 drivers in it's speak- er section and a chassis that has 3 amplifiers, a set of tubes, 2 fans (with heat sinks) and 6 circuit boards.
- Page 8 K4 FINISHING Wiring Diagram 24-inch White R T V YELLOW 100V BLACK WHITE WHITE BROWN ORANGE 100V 5933 R T V 15-inch Orange #7286 #7286 Facing Front #7388 WOOFER #7405 #7405 Bottom FINISHING-K4-speaker-wiring-00-1v1.pdf...
- Page 9 4.75" 8r 30WPGM CUT OUT R10 , R12 UNTIL 2 TO 4 mV 1/4W IS ACROSS TP1 AND MC33079P HORN TP2 WITH AMP COLD TIP142 MC33079P U7:D 100V 100V 7286 1/4W 1/4W 6902 U7:C 100V 100V R181 R182 TO218 1/4W 1/4W 680R 100N...
- Page 10 WARNING: 120 VDC IS BETWEEN C55 TO GROUND.THIS PRESENT A SIGNIFICANT SCHOCK HAZARD. PLEASE, USE EXTREME CAUTION WHEN SERVICING! 0A2 BAT85 6405 R191 1/4W R186 R187 R189 100K 1/4W 1/4W 1/4W BC550C 220K 470R R192 BAT85 1/4W R188 CURRENT LIMIT 6405 BC560C 470R...
- Page 11 R126 1N5251BRL 22V0 R127 MC7815CT TUBE120VDC 1.0W R128 1/4W +29VDC FLMP 6872 R129 MC7815CT 220U 160V 1.0W R130 4007 4007 FLMP 220U 6872 R131 4148 1/2W 160V 4007 220U 6871 R132 4007 160V 4007 1.0W MC7915CT FLMP W50 BLU -29VDC TUBE AG2 3414 DPDT Switch...
- Page 12 BlankSize - 17000x11000 4032 ETCH 3498 3498 3498 GUIDE Pcb Mech M1238 3V00 3602 Top Assy M1238 3V00 CH-4 GAIN M1238 L-MID R-MID 3V00 250V 6451 PCB CONN 4 CIR BOTTOM .156 SUB-OUT LEFT RIGHT R175 3903 3538 R167 R166 100N 3903 R174...
- Page 13 SEE LAYOUT DIAGRAM PRODUCTION NOTES K4 M1238 8841 3977 - Yellow spring 8581 TO220 parts Sil pad 1--ADD THERMAL JOINT COMPOUND (GOOP) BETWEEN Q25 AND Q26; Inner heatsink Outer heatsink Q31 AND Q32 . COVER WITH VINYL CAP (8609) AND RTV. 8841 8833 screw 3719 - Spring...
- Page 14 SEE LAYOUT DIAGRAM M1238 DATABASE HISTORY POT LIST MODEL(S):- MODEL(S):- DATE VER# DESCRIPTION OF CHANGE FUNCTION PART# KNOB 08-FEB-2007 1.00 FIRST PROTO CH-4 GAIN 4032 9922 08-MAR-2007 2.00 REPLACE OPTOCOUPLER PIN CONFIGURATION PC#7281,CHANGE W3,W6,W8 & W9 TO NORMAL EYELET 13-FEB-2008 3.00 PC#7291,REPLACE FAN EYELETS WITH MOLEX.
- Page 15 1/4W 4148 100K R119 CHANNEL-1 INPUT -1 TO92 1/4W ORGAN 100V 400V 5106 1/4W 220P 100V MC33079P 4148 MINI R110 R111 R114 R115 1/4W R165 1/4W 1/4W 1/4W 1/4W U2:B 10K0 100K 150N 1/4W R321 MPSA63 1/4W 20K0 4148 1/4W 4148 6405 MINI...
- Page 16 4148 R162 CHANNEL-1 INPUT-2 C110 C111 1/4W ORGAN 100V 400V 1/4W 220P 100V MC33079P C108 R143 R142 R146 R145 R185 C123 1/4W 1/4W 1/4W 1/4W 1/4W U9:B R325 100K C114 150N 10K0 1/4W 1/4W 1/4W 20K0 4148 113K MINI 100N 220P CH-1 I/P-2 LEFT R157...
- Page 17 4148 R252 R250 R270 1/4W 1/4W 1/4W TO92 270R C138 5106 6405 4148 R251 4148 BASS R210 R211 1/4W 1/4W R189 MPSA63 1/4W 1/4W 1/4W 1/4W P7:A 3K74 249R 562R 4K99 B LIN 4478 R262 100P MC33079P 1/4W 4148 C142 270R R216 C155...
- Page 18 BlankSize - 19100x10400 Top Assy M1239 V1.01 Pcb Mech M1239V1.01 R291 M1239 2/3 10K0 5989 4041 3672 V1.01 C189 R286 C164 C188 681R0 4036 C207 C166 X149 C170 X157 X154 X150 X183 10K0 R289 X156 X155 C114 10K0 R290 C102 R270 C118 C119...
- Page 19 SEE LAYOUT DIAGRAM PRODUCTION NOTES K4 M1239 --------------------------------- 1- CUT METAL PIN OF J8 , J13 AND J14 XLR 2- RTV ALL CAPACITORS Break this connection here. 3- C167, B.A. WILL PUT A 220N #5600 INSTEAD OF 22N...
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Page 20: Pin Configuration
SEE LAYOUT DIAGRAM M1239.PCB_DATABASE_HISTORY POT LIST MODEL(S):- MODEL(S):- DATE VER# DESCRIPTION OF CHANGE FUNCTION PART# KNOB {NEW} MAY-10-2005 1V00 FIRST LAUNCH 5POS-2S SWITCH 3393 8400 FEB-07-2008 1V01 PC#7464, REPLACE R248 & R249 FROM 1K TO 2K #4808 CH-1 GAIN 4477 8399 PC#7217, REPLACE C167 22N #6435 WITH 220N #5600 P2,P3,P5,... - Page 21 M1240 L-MID R-MID V100P0 3903 PCB CONN 4 CIR BOTTOM .156 3538 M1240 .156 BOTTOM CONN V100P0 3903 L-TWEETER R-TWEETER CLINCH ETCH INSERT ORIGIN GUIDE LONG AXIS ORIGIN SEE LAYOUT DOCUMENTATION...
- Page 22 SEE LAYOUT DIAGRAM MODEL(S):- M1240-P0 DATE VER# DESCRIPTION OF CHANGE APRIL-14-2008 V1.00 MULTIPLE X-OVER BOARDS FOR SERVICE...
- Page 23 CH1339E...