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SERVICE MANUAL
MODEL TYPE: YS1064
TRAYNOR YCS50H
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-YCS50H-00-1v4.pdf
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Table of Contents
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Summary of Contents for YORKVILLE TRAYNOR YCS50H
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Page 1: Service Manual
SERVICE MANUAL MODEL TYPE: YS1064 TRAYNOR YCS50H 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... -
Page 2: Important Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS This lightning flash with arrowhead symbol, within The exclamation point within an equilatereal triangle is an equilateral triangle, is intended to alert the user to intended to alert the user to the presence of important the presence of uninsulated “dangerous voltage” operating and maintenance (servicing) instructions in within the product’s enclosure that may be of sufficient the literature accompanying the appliance. -
Page 3: Specifications
Specifications Model: YCS50 / YCS50H / YCS90 Type: Combo / Head / Combo Guitar Amplifiers Cabinet Impedance (ohms): 8 / na / 8 Power @ min. impedance (Watts): 50 / 50 / 90 Minimum Impedance (ohms): 4 ohms on all models... - Page 4 Block Diagram for YCS50/50H/YCS90 YCS50H Tube Configuration D E S I G N E D A N D M A N U F A C T U R E D B Y Y O R K V I L L E S O U N D...
- Page 5 3682 +PLATE V5:A R149 R136 2.0W 1/4W To_PreAmp 250V To_PowerSupply 820R EL34 R143 PENTODE W30:A 8 W29:A 9 249K W30:B 8 W29:B W30:C 8 W29:C R133 W29:D 9 W30:D 8 W29:E 9 W30:E 8 W29:F R134 W30:F 8 W29:G 3682 OutCT W30:G 8 W29:H 9...
- Page 6 -PLATE BLU W12 OutCT R142 3984 2.0W R T V 820R R138 249K R144 249K R143 R257 220K Bias 4148 2N5401 R260 R149 3984 2.0W R T V ETCH GUIDE R136 820R R141 To_PreAmp 100R0 100R0 R140 3538 820R To_PowerSupply 3538 CLINCH ETCH...
- Page 7 SEE LAYOUT DIAGRAM PRODUCTION NOTES M1292.PCB_DATABASE_HISTORY MODEL(S):- YCS50 Output DATE VER# DESCRIPTION OF CHANGE APPLY RTV TO C65 AND C67. 19-JUN-2007 1.00 FIRST DESIGN 11-FEB-2008 1.01 REVISION PER PC7456 14-APR-2008 1.02 CHANGED VALUE OF R49 TO 33K PER PC7535...
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Page 8: Input Stage
470P R108 R123 4423 249K Alternate MINI W29:H MINI TO_PRE-OUT R129 450V P6:A 100N 100V -15V W18:A W19:H 8 -15V +15V Product LVGND YCS50H Preamp LVGND Gain/EQ PCB# M1293 Sheet Date: Thu May 24, 2012 Rev: v1.00 YsType: Filename: M1293V04SCH.sch2006... - Page 9 4 W35:A LVGND EC122 STANDBY W31:A LVGND W27:A +15V STANDBY W31:B 4 W35:B LVGND LVGND W27:B -15V LVGND Product YCS50H Preamp W27:C W31:C N085 SPLIT_IN SPLIT_IN 4 W35:C EC121 +15V W27:D N086 LVGND LVGND W31:D -15V 4 W35:D W27:E N004...
- Page 10 PC7865: changes according to PC BC550C J109 MPSA56 24-MAY-2012 PC8405 - Changed resistor values. - ML BC560C MPSA63 2N5638 6882_PC "STYLE_P28" TO-92 TO-92 TO-92 "STYLE_P32" Product YCS50H Preamp Switching PCB# M1293 Sheet Date: Thu May 24, 2012 Rev: v1.00 YsType: Filename: M1293V04SCH.sch2006...
- Page 11 4148 Alternate BOOST Modern M1293 Scoop 100K R132 220K 2N5638 10V0 R134 470K 4148 MPSA06 R140 BC550C BC560C YCS50H Preamp 4148 RELAY 1C 4148 100N 470K 4423 4425 R T V 4423 R143 V4.00 CH-SELECT Presence Resonance R148 R141 MASTER VOL 150N 1.0W...
- Page 12 SEE LAYOUT DIAGRAM M1293 PRODUCTION NOTES 1. DO NOT AUTO INSERT OR HAND INSERT COMPONENTS MARKED WITH "X" 2. DIP #6544 SWITCH IN SOLDER POT BEFORE INSERTION. 3. PCBSA: BREAK OUT BOARD BEFORE TESTING 4. PCBSA: HAND INSERT R24 WITH YS#4618. 6544-MTG Notch 6544...
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Page 13: Pin Configuration
SEE LAYOUT DIAGRAM M1293 PCB_DATABASE_HISTORY M1293 POTLIST MODEL(S):- YCS50H YCS50H MODEL(S):- DATE VER# DESCRIPTION OF CHANGE FUNCTION PART# KNOB 11/APR/2008 1.00 RELEASED FOR PRODUCTION SEND LEVEL 4417 8431 2008/04/30 2.00 PC#7535 & flipped standby switch. OD GAIN 4425 8431 23-SEP-2009 . -
Page 14: Variant Parts
Variant Parts C86 and C87 PCB# Value Part# M1295 470U 470U 5957 5957 M1353 330U 330U 6574 6574 16AWG 16AWG OUTX-F_CT SCREEN SPLITTER D13 W1 R221 10K0 R178 R203 OUTX-F_CT 2.0W 1.0W 1.0W 1.0W +225V {Description} R205 10K0 HER508 HI V HER508 Choke 3682... - Page 15 BREAK PANEL IN 2 ALONG THIS SCORE LINE BEFORE CLINCHING. CLINCH ORIGIN SCORE M1353 V05 YCS50/50H StepAndRepeat - X3@5.375Y2@5.400 SCORE R184 100R 100R 470U 1.0W 1.0W 1000U R T V R185 5618 100U 5635 8799 4007 5635 3692 R T V 3692 4007 To_PowerAmp...
- Page 16 SEE LAYOUT DIAGRAM PRODUCTION NOTES X8001(M1295, M1353) X8001.PCB_DATABASE_HISTORY 1. BEFORE CLINCHING, BREAK PANEL IN 2 ALONG LINE WHERE INDICATED. MODEL(S):- YCS50, 50H, 90 DATE VER# DESCRIPTION OF CHANGE 2. B.A. Variant parts: 26-FEB-2007 1.00 2nd Proto BOARD 20-MAR-2007 Moved R171 0.05in away from tab W11. Rotate C8 to M1295 #5857, 470U #5857, 470U...
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Page 17: Amp Mode
M1353 V4.00 YCS50H 100R 100R 470U R184 1.0W 1.0W 1000U R T V R185 8799 5618 100U 5635 3538 .4"Fins 5635 3692 4007 8799 R T V 3692 4007 To_PowerAmp R182 100U M1295 YCS90 HI V 16AWG M1353 YCS50/50H 5635... - Page 18 M1353 V4.00 YCS50H 100R 100R 470U R184 1.0W 1.0W 1000U R T V R185 8799 5618 100U 5635 3538 .4"Fins 5635 3692 4007 8799 R T V 3692 4007 To_PowerAmp R182 100U M1295 YCS90 HI V 16AWG M1353 YCS50/50H 5635...
- Page 19 M1353 V4.00 YCS50H 100R 100R 470U R184 1.0W 1.0W 1000U R T V R185 8799 5618 100U 5635 3538 .4"Fins 5635 3692 4007 8799 R T V 3692 4007 To_PowerAmp R182 100U M1295 YCS90 HI V 16AWG M1353 YCS50/50H 5635...
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Page 20: Service Bulletin
Traynor YCS50, 2. Turn the amplifier on; allow it to warm up for 2-3 minutes. YCS50H & YCS90 3. Once the amplifier is warmed up, make sure the amplifier is out of Standby mode. Do not apply any input stimulus (signals etc.). - Page 21 3428 8' 3/18 SJT AC LINE CORD REMOVABLE 8832 6-32 X 1/4 PAN PH TAPTITE JS500 5103 MPSA06 TO92 NPN TRAN T&R TA 8269 TRAYNOR LOGO PLASTIC W/ BLK INSERT 8801 6-32 X 3/8 PAN PH TAPTITE JS500 5104 MPSA56 TO92 PNP TRAN T&R TA...