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WEB: www.yorkville.com
WORLD HEADQUARTERS
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
U.S.A.
Yorkville Sound Inc.
4625 Witmer Industrial Estate
Niagara Falls, New York
14305 USA
Voice: (716) 297-2920
Fax: (716) 297-3689
AP4020
1. Parts List
2. Pot Board
• M1128 Schematic
• M1128 PCB layout
3. Input Board
• M1129 Schematic
• M1129 PCB layout
4. Power Supply Board
• M1127 Schematic
• M1127 PCB layout
5. Power Amp Module
• M1126 Schematic
• M1126 PCB layout
4. Service Kit
• M1146/m1126
SERVICE MANUAL
s-ap4020.pdf v3.3 6/2002
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Related Manuals for YORKVILLE Professional Series
Summary of Contents for YORKVILLE Professional Series
- Page 1 WORLD HEADQUARTERS CANADA U.S.A. 5. Power Amp Module • M1126 Schematic • M1126 PCB layout Yorkville Sound Yorkville Sound Inc. 550 Granite Court 4625 Witmer Industrial Estate 4. Service Kit Pickering, Ontario Niagara Falls, New York • M1146/m1126 L1W-3Y8 CANADA...
- Page 2 IMPORTANT SAFETY INSTRUCTIONS AP4020 Parts List 2/16/99 YS # Description Qty. YS # Description Qty. YS # Description Qty. 3570 14 PIN SCKT 641261/3 OR W3114T 2448 15.0 AMP CIRCUIT BREAKER 4629 1/2W 10K T&R RES 5906 RED 3MM LED 1V9 20MA .4 SPACER T&R 3820 4UH COIL 14AWG ZOBEL HORIZONTAL 4800 1/4W 10K0 1% T&R RES...
- Page 3 SERVICE MANUAL SERVICE MANUAL Yorkville Sound • http://www.yorkville.com Yorkville Sound • http://www.yorkville.com The activity LED circuit consists of Q1 and the surrounding circuitry. The audio sig- Y Y o o r r k k v v i i l l l l e e A A P P 4 4 0 0 2 2 0 0 P P o o w w e e r r A A m m p p l l i i f f i i e e r r nal enters the activity LED circuit through R2.
- Page 4 SERVICE MANUAL SERVICE MANUAL Yorkville Sound • http://www.yorkville.com Yorkville Sound • http://www.yorkville.com CIRCUIT DESCRIPTION: The voltage amplifier is a mirrored image with circuitry connected to the positive power supply rail being identical (but opposite polarity) to the circuitry connected to the nega- tive power supply rail.
- Page 5 SERVICE MANUAL SERVICE MANUAL Y orkville Sound • http://www.yorkville.com Y orkville Sound • http://www.yorkville.com amount of time was spent on the current limit circuitry so that it may simulate the safe This causes Q40 to turn off until the reduced current flowing through Q5 maintains operating area of the output transistors (SOAR curve).
- Page 6 SERVICE MANUAL SERVICE MANUAL Yorkville Sound • http://www.yorkville.com Yorkville Sound • http://www.yorkville.com If prolonged current limiting occurs on the amplifier’s output transistors then D204 or D205 (depending on which channel is current limiting) will be forward biased turning on NOTE: Every time you replace blown output transistors on a Q202 (from its off state).
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Page 7: Specifications
SERVICE MANUAL SERVICE MANUAL Yorkville Sound • http://www.yorkville.com Yorkville Sound • http://www.yorkville.com is 10 volts across R235 or R236 which is enough to turn on Q210, Q208, and Q207 pro- viding 7 DC volts to the fan. Further heating the temperature sensors results in a larger DC voltage across the fan. - Page 8 100P R_GAIN M1128.SCH_DATABASE_HISTORY GAIN 4K12 20K0 MODEL(S):- AP4020/AP4040/AP2020 DATE VER# DESCRIPTION OF CHANGE OCT/97 1.00 FIRST_PRODUCTION 15v 220p MC33078P APR/22/98 1.10 PC#5694_ADD_CONNECTIONS_FOR_BRPRTCT (4=V-,8=V+) BETWEEN_14_PIN_CONNECTOR_&_RIBBON AP4020/AP4040/AP2020 DATE: APR/22/98 MODELS: SHEET SCH VERSION: 1.10 POT-BOARD YORKVILLE NAME: M1128.SCH PCB#&VER: M1128 TITLE: POT-BOARD...
- Page 9 M1128 AP4020/4040 VER 3.00 CONN3A TO P.S. PCB BLACK 100K 14-PIN.SOCKET 220p SPC2 BC560 100K 220p 470R 470R BC560 L_CLIP 470K R_CLIP 4148 4148 R55A 220R L_GAIN R_GAIN 470K 220R SPC1 470R L_ACTIVITY BC560 220R R_ACTIVITY #6859 LD8 #6859 R136 220K SPC3 220R...
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Page 10: Balanced Input
(4=V-,8=V+) APR/22/98 2.10 PC#5694_ADD_CONNECTIONS_AT_BRIDGE SWITCH_FOR_BRPRTCT/LVGND-28 -1dB 6Hz RIN_XLR R109A NUTRIX -1dB 40Hz 12Db/Oct 220p 220p 16v 150N 16v 150N AP4020/AP2020/AP4040 DATE: APR/22/98 MODELS: SHEET SCH VERSION: 2.10 9K760 9K760 RREF INPUT 120K 1K54 YORKVILLE NAME: M1129.SCH PCB#&VER: M1129-2.00 TITLE: INPUT-BD... - Page 11 M1129 RIGHT AP2020/AP4020/AP4040 PART#3436 FROM POTS VER 4.00 GND_LIFT 1K54 RSPOST 9K760 9K760 1K54 LIMABLE 275V RSIG 9K760 220P LSPOST LSPOST LSPOST LSPRE LREF 33078 RREF RSPRE 10K0 10K0 R119 150N 9K760 220P 9K760 LIMITER PART#3436 9K760 120K 120K 33078 FILTER PART#3436 150N...
- Page 12 BROWN/BLACK LEAD TO OCT/27/98 3.30 R241_4K7->C216_100u/25V DUMMY TAB LNFB RNFB NOV/17/98 3.40 CORRECT_C+,C-_AT_REL1 LNFB RNFB JAN/21/99 3.50 XFMR_WIRE_COLOURS_UPDATED LSIG LOSIG RSIG ROSIG 230 VAC 50 Hz LINE AP4020 DATE: JAN/21/99 MODELS: SHEET SCH VERSION: 3.50 YORKVILLE NAME: M1127.SCH PCB#&VER: M1127 TITLE: POWER_SUPPLY/FAN...
- Page 13 M1127.PCB_DATABASE_HISTORY M1127 AP4020 MODEL(S):- SHEAR FIRST AP4020 SHEAR FIRST DATE VER# DESCRIPTION OF CHANGE WC10 WC13 OCT/97 1.00 FIRST_PRODUCTION R232_150R->270R_R233_10R->2R BLACK NOV/13/97 1.01 PC#5514_R232_270R->470R C207 NOV/25/97 2.00 PC#_____DELETE_TRIAC_ADD_RELAY_R233 V T R 2R0->10R_ZD208/209_20V->18V_U201_TL 470u WC14 EY12 -072->33078 V T R DEC/12/97 3.00 UPDATE_FOR_AP4040 470u...
- Page 14 6800U DEC/17/97 1.20 PC#5550_R36,R39_47K->68K_R40A,R35B JAN/24/02 1.90 PC#6506_ZD10/ZD11_4V7->3V0 16K->13K MAY/23/02 2.00 PC#6514_Q13->Q20_#6900->#6909 MAR/03/98 1.30 CORRECTIONS Q21->Q28_#6927->#6910_R5/R17_249R-> AP4020 JUL/09/99 1.40 SPKON_JACKS_ADDED ->150R_R13_27K->43K_ZD5_12V->14V DATE: MAY/23/2002 MODELS: SHEET SCH VERSION: 2.00 AUG/30/99 1.50 BRIDGED_SPKON_B->A MAY/31/01 1.60 PC#6381_ADD_R86/R87_C33/C34 YORKVILLE NAME: M1126.SCH PCB#&VER: M1126 TITLE: OUTPUT-BD...
- Page 15 PRODUCTION NOTES M1126 AP-4020 MOUNTING DETAILS FOR 5W ADD #8629 SPACERS ONLY ON 5 WATT RESISTORS MARCONI HOLE YS6900 R29, R29A R45 AND R45A YS6900 YS6900 YS6900 MOUNTING HARDWARE FOR Q5,Q6 MR854 MR854 MR854 MR854 #8871 4-40X 1/2" BOLT MARCONI YS6900 YS6900 #3501 BELL WASHER...
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Page 16: Service Bulletin
AP4040 Quick Fix for M1146 & M1126 To speed up the servicing of the AP4020 or AP4040 on your bench, Yorkville Sound’s service department has developed a method to replace the compo- nents most likely to fail when a M1146 amplifier board requires service. - Page 17 . y o r k v i l l e . c o m w w w . y o r k v i l l e . c o m Yorkville Sound Yorkville Sound Inc. Yorkville Sound Yorkville Sound Inc.
- Page 18 M1146 KIT #6444 MAC224-4 YS6927 #4973 1R/1W 1WATT YS6900 YS6900 #4973 1R/1W 1WATT #4607 1/8WFP #4607 1/8WFP #6201 200R 1/4WFP 200R YS6927 #6201 200R 1/4WFP 200R YS6900 #6201 200R 1/4WFP 200R #4645 220R0 1/8WFP 220R0 #4645 220R0 1/8WFP 220R0 #4911 1/4W #4911 1/4W...
- Page 19 AUG/26/98 1.10 PC#5806_ADD_33u/16V_33R_IN_SERIES ACROSS_R57A_AND_ACROSS_R64A -145 JUL/12/99 1.20 SPKON_JACKS_ADDED 4700U 4700U AUG/30/99 1.30 BRIDGED_SPKON_B->A E B C E B C C B E AP4040 DATE: AUG/30/99 MODELS: SHEET SCH VERSION: 1.30 YORKVILLE NAME: M1146.SCH PCB#&VER: M1146 TITLE: OUTPUT-BD M1146kit Version 1.0...
- Page 20 M1146 AP-4040 MARCONI HOLE YS6900 YS6900 YS6900 YS6900 CHECK 3. TEST THIS ROW THIRD CHECK CHECK CHECK MR854 MR854 MR854 MR854 MARCONI YS6900 YS6900 HOLE YS6900 YS6900 1. TEST THIS ROW FIRST CHECK CHECK CHECK CHECK BLUE YS6927 YS6927 2. TEST THIS ROW SECOND YS6927 YS6927 CHECK...
- Page 21 A P4020CE AC WIRING OCT,24,2000 4 " S HOWN WIRE D FOR 230V BROWN/BLACK GREY 1196E YELLOW GREY BLUE M 1127-5. 00 BROWN 15 " BLACK WHITE 17"...
- Page 22 A P4020CE AC WIRING OCT,24,2000 4 " S HOW N WIRE D FOR 245V BROWN GREY 1196E YELLOW GREY BLUE M 1127-5. 00 15 " BLACK WHITE 17"...
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