Instruction/ maintenance manual of the product 3400 Yorkville Sound
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SERVICE MANUAL 3 4 00 HIGH EFFICIENCY STEREO POWER AMPLIFIER 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.
1 AUDIOPRO AP-3 400 SERVICE MANUA L M1012A “THE IN PUT BOARD” The input board processes th e audio signal from the input jacks to the voltage a mplifier board, (M 1011A). Each channel cons ists of a ba lanced gain st age, defeatable b ass boost filter, a nd a preemphas is filter netw ork.
2 VOLTAGE AMPLIFIER: The voltage ampl ifier am plifies the au dio sign al?s vo ltage fro m 4.8 v olts peak (at the output of U2) to a pproxi mently 97v peak which is requir ed to drive t he current ampl ifier bo ard M100 2A.
4 5 QUIESCENT CONDITION: This desi gn is c lass A/ B and t herefor e the o utput driver trans istors must be forward biased t o provi de low cr ossover distortion. In mos t class A /B des igns, a diode ch ain or VBE m ultip lier is used to c ontrol the bias volt age and pr ovide a means of a djust ing the bi as.
6 The voltage betwee n the amplifier ?s output and tes t point 4 is appr oximate ly 14.7V DC derived from the v oltage dr op across ZD3 @ ZD4. We ca ll this voltage th e “float ing batt ery” because it floats on top of the out put audi o sign al w ith poi nt 4 always b eing 1 4.
8 EMS Ci rcuit The Energy Mana gement System c irc uit only appli es to Nor th Amer ican line vol tage pr oducts . A North Amer ican AC receptacle can pr ovide 1850 w atts befor e the w all bre aker w.
10 STEP 3: POW ER UP PROCEDURE WITHOUT M1002A BOARDS It is extre mely importan t that y ou never power u p an AP 3400 wit h the i ntercon nectin g cables between t he circ uit boards n ot connec ted. Time and pos sible further damage will be r educed if you tes t M1 011A a nd M1002A boar ds separat ely.
Identifying Defective Boards in the AP-3000 & AP-3400 Please note: All boards used in the AP-3400 are designated with an `A' suffix (e.g. M1002A) and use bright red solder mask STEP 1: VISUAL INSPECTION OF FRONT PANEL AND FAN a) Check to see whether the green power LED is lit.
220R0 R51 6800u 80V C22 6800u 80V C23 T5 T3 T1 T4 6800u 80V C24 6800u 80V C25 T10 T9 T8 T7 T6 T2 249R:1% R5 BC550 Q1 BC550 Q4 BC560 Q2 BC560 Q3 2R2 R3 2R2 R4 150R R7 150R R15 4K7 R10 CW 4K7 LIN RT1 1n.
820R R9 RED LD1 47p C2 47p C1 10K:1% R14 10K:1% R13 1/2 33078 U2 2 3 1 1u 16v C3 100K RV2 D2 D1 100K RV1 1K R2 BC550 Q3 330R R36 MS4 1 2 3 4 5 6 7 8 1/2 33078 U3 2 3 1 BF872 Q11 220K R10 100n C4 2u2 1.
SHEAR SHEAR ROUTE GAGE 0.01"/HOLE .020" .012" .008" .005" VCD .020" .012" .008" .005" SHEAR SHEAR .020" .
TJH1 GUIDE ETCH EY16 F HS1 PART# HS2 PART# R60B 2_WATT 220K @R8 J1 J9 HS3 PART# D21B 4148 D21A 4148 1 _MW1 FUNCTION PART# Q19B MJE350 TP6 TP5 C22B @C1 300V 10P C23B @C1 300V 10P C22A @C1 300V 10P C23A @C1 300V 10P Q19A MJE350 Q18A MJE340 Q18B MJE340 C27B @C2 160V 10U C28B @C2 160V 10U C28A @C2 160V 10U C27A @C2 160V 10U R103 @R3 0.
1/2 5532 U3 2 3 1 4M7 R14 16v 470n C7 OUT IN S1 1 2 3 1/2 5532 U3 6 5 7 17K8:1% R15 16v 150n C9 16v 47n C8 16v 100n C6 16v 68n C5 SRT CH_B_IN NO_GOLD JB2 1 2 3 4 5 6 NUTRIX BAL_IN JB1 1 3 2 1/2 33078 .
VCD .025" .030" .040" .050" .060" SHEAR SHEAR SHEAR SHEAR SHEAR 2.00 2.00 SOLDERSIDE M1012-2.00 1.20 SEPT’89 M1012 M1012 M1012 BLANK SIZE=15.
WC3 MC1 1 40CFM FAN 22n CSA C54 MC1 2 D47 7K5 R123 33v 500mW ZD15 27K R116 8 7 MC1 3 MC1 4 MC1 5 WC8 WC6 WC4 WC7 EY7 EY6 EY3 EY5 EY10 WC11 WC1 1K R124 D48 EY13 EY14 D37 D46 22n CSA C53 4n7 CSA C55 EY4 EY2 EY11 D41 4v7 500mW ZD10 2R2 0.
WC3 MC1 1 40CFM FAN 22n CSA C54 MC1 2 D47 7K5 R123 33v 500mW ZD15 27K R116 8 7 MC1 3 MC1 4 MC1 5 WC8 WC6 WC4 WC7 EY7 EY6 EY3 EY5 EY10 WC11 WC1 1K R124 D48 EY13 EY14 D37 D46 22n CSA C53 4n7 CSA C55 EY4.
.020" .012" .008" .005" SHEAR SHEAR SHEAR SHEAR SHEAR SHEAR SHEAR SHEAR VCD .020" .012" .008" .005" .020" .012" .008" .005" SOLDERSIDE M1013-2.30 2.30 BLANK SIZE=12.600"X6.500" M1013- 2 OZ COPPER DRILL DETL M1013-2.
R27 2R2 GS Q6A @Q1 MTP2P50E D1 4148 D2 4148 D3 4148 J12 R79 1W 0.R47 D9 4148 C22 @C3 #5892 80V 6800U C23 @C3 #5892 80V 6800U C24 @C3 #5892 80V 6800U C25 @C3 #5892 80V 6800U C3 22U 10V TAB7 WC6 WC6 16AWG 5.
T es ting Repa ired Cir cuit Board Now th at you have rebui lt th e M1002 o r M1002A circuit board . It is just as important to properly power up the boar d.
YORKV ILLE SOUND AP3000 AND AP3400 SERVICE Quick Fix for M1002 and M1002A To speed up the s ervicing of the AP3000 or AP3400 on your bench, Yorkville Sound’s service department has d eveloped a method to replace the components most likely to fail when a M1002/A amplifier board requir es service.
STEP 1. Locate the as sem bly drawin g for the ve rsio n num ber pr inte d on the M1002 or M10 02A circ uit b oard to be se rv iced. 2. Rem ove all of t he tran s is t ors co loure d RED o n the ass em bly draw ing. 3. Measure a nd rem ove any of the d iodes c oloure d BLU E on the assem bly drawin g tha t m a y be dam aged.
5. Measure the resistor coloured GREEN. The measured value should measure within + or – 5% valu e listed in the t able below. Repl ace any res istor t hat measure d bey ond th e + or – 5% value list ed in the ta ble bel ow . Resistor Printed Corre ct Number Value Measured Value -5% +5% R10 4K7 2K25 2K3 2K35 6.
SHEAR SHEAR SHEAR SHEAR VCD SHEAR SHEAR SHEAR SHEAR SOLDERSIDE M1002-9.00 BLANK SIZE=14.750"X8.850" S GG S G S D G S D G G S R27 2R2 GS Q6A @Q1 MTP2P50E D1 4148 D2 4148 D3 4148 J12 R79 1W 0.R47 D9 4148 C22 @C3 #5892 80V 6800U C23 @C3 #5892 80V 6800U C24 @C3 #5892 80V 6800U C25 @C3 #5892 80V 6800U C3 22U 10V TAB7 WC6 WC6 16AWG 5.
BL U RED BL U GR E Y Y ELLOW WH I TE YEL WHT RED FAN- BL K T-BRK BL K RED Y ELLOW BLU AC- W HI TE FAN- L1 WC 7 C44 C45 C46 C47 EY7 EY10 EY11 EY5 EY 1 2 WC8 TJ H 1 WC10 WC 4 WC3 EY13 WC 1 WC11 WC6 EY8 EY6 EY9 RV5 100K EY2 EY3 EY4 C55 4N7 250V EY14 C53 22N 250V C54 22N 250V RV6 100K #1 289 AP-3400C E XFM R WIRING NOV 13.
BL U RED BL U GR E Y Y ELLOW WH I TE YEL WHT RED FAN- BL K T-BRK BL K RED Y ELLOW BLU AC- W HI TE FAN- L1 WC 7 C44 C45 C46 C47 EY7 EY10 EY11 EY5 EY 1 2 WC8 TJ H 1 WC10 WC 4 WC3 EY13 WC 1 WC11 WC6 EY8 EY6 EY9 RV5 100K EY2 EY3 EY4 C55 4N7 250V EY14 C53 22N 250V C54 22N 250V RV6 100K #1 289 AP-3400C E XFM R WIRING NOV 13.
An important point after buying a device Yorkville Sound 3400 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Yorkville Sound 3400 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Yorkville Sound 3400 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Yorkville Sound 3400 you will learn all the available features of the product, as well as information on its operation. The information that you get Yorkville Sound 3400 will certainly help you make a decision on the purchase.
If you already are a holder of Yorkville Sound 3400, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Yorkville Sound 3400.
However, one of the most important roles played by the user manual is to help in solving problems with Yorkville Sound 3400. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Yorkville Sound 3400 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
