Yorkville Sound 3400 - Manuals

Page 2 - AUDIOPRO AP-3400 SERVICE MANUAL; IMPORTANT SAFETY INSTRUCTIONS; CAUTION; REFER SERVICING TO QUALIFIED; Power Sources; CONSULTEZ UN TECHNICIEN QUALIFIE; Alimentation

1 AUDIOPRO AP-3400 SERVICE MANUAL M1012A “THE INPUT BOARD” The input board processes the audio signal from the input jacks to the voltage amplifier board, (M1011A). Each channel consists of a balanced gain stage, defeatable bass boost filter, and a preemphasis filter network. The balanced input, (XL...

Page 7 - SPECIFICATIONS

10 STEP 3: POWER UP PROCEDURE WITHOUT M1002A BOARDS It is extremely important that you never power up an AP3400 with the interconnecting cablesbetween the circuitboards not connected. Time and possible further damage will be reduced if you test M1011A and M1002A boards separately. To do this youmust...

Page 8 - extremely important

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) anduse bright red solder mask STEP 1: VISUAL INSPECTION OF FRONT PANEL AND FANa) Check to see whether the green power LED is lit. If not, the amplifie...

Page 10 - DESCRIPTION OF CHANGE

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 16v C5 D4 D3 1/2 33078 U3 6 5 7 A63 Q5 270R R17 113K0:1% R16 10k:1% R20 113K0:1% R15 27p C32 BC560 Q1...

Page 11 - VCD; SHEAR; RED; WHT; POW SUP; BOTTOM; INPUT BOARD; TOP; GUIDE ETCH; GUIDE; GND; DOWN; NOTE RELAY HAS

SHEAR SHEAR ROUTE GAGE 0.01"/HOLE .020" .012" .008" .005" VCD .020" .012" .008" .005" SHEAR SHEAR .020" .012" .008" .005" 5.13 SOLDERSIDE M1011-5.10 BLANK SIZE=16.000"X11.050" M1011- RED YEL BLK WHT BLU POW SUP BOTTOM INPUT BOARD TOP TJH1 G...

Page 12 - DATE; TO BE HAND INSERTED; WIRE

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 @C 1 300V 10P C23A @C1 300V 10P Q19A MJE350 Q18A MJE340 Q18B MJE340 C27B @C2 160V 10U C28B @C2 160V 10U C28A @C2 160V...

Page 14 - LINEWIDTH GAUGE; GRN; BEFORE

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=15.700"X10.000" 5 5 4 4 1 DRILL DETL M1012-2.00 U3 5532 40 40 40 40 40 40 40 40 U1 33078 @U1 40 40 40 40 40 40 40 40 U2 33078 @U1 40 4...

Page 15 - E B C

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 0.5W R122 D40 MJH11018 Q35 EY8 1N4004 D45 470u 25v C51 1N4004 D44 2...

Page 17 - YELLOW

.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 M1013-2.30 TJH2 L1 #3822 C44 @C1 80V ...

Page 18 - OUTPUT

R27 2R2 G S 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 5.5"BLK R5 249R R3 2R2 R4 2R2 R7 150R R15 150R R10 4K7 R8 15K R9 249R R19 249R R16 15K R14 3...

Page 19 - Testing Repaired Circuit Board; See details of figure 3 in service manual.

Testing Repaired Circuit Board Now that you have rebuilt the M1002 or M1002A circuit board. It is just as important toproperly power up the board. If the sinewave doesn’t look right check the signal at testpoint (1) on M1002 to ensure that the voltage amplifier on board M1011 or M1011A isn’t distort...

Page 20 - YORKVILLE SOUND; To speed up the servicing of the AP3000 or

YORKVILLE SOUND AP3000 AND AP3400 SERVICE Quick Fix for M1002 and M1002A To speed up the servicing of the AP3000 or AP3400 on your bench, Yorkville Sound’s servicedepartment has developed a method to replace thecomponents most likely to fail when a M1002/Aamplifier board requires service. This Quick...

Page 21 - STEP; Locate the assembly drawing for the version number printed on

STEP 1. Locate the assembly drawing for the version number printed on the M1002 or M1002A circuit board to be serviced. 2. Remove all of the transistors coloured RED on the assembly drawing. 3. Measure and remove any of the diodes coloured BLUE on the assemblydrawing that may be damaged. Replace a 1...

Page 23 - VBE; CHECK

SHEAR SHEAR SHEAR SHEAR VCD SHEAR SHEAR SHEAR SHEAR SOLDERSIDE M1002-9.00 BLANK SIZE=14.750"X8.850" S G G S G S D G S D G G S R27 2 R2 G S 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 8...