YORKVILLE Audiopro 3400 Service Manual page 8

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. If not, the amplifier has a power supply (M1013
board), transformer, A.C. switch or line cord problem.
b) If the red protect LED stays on or samples off and on, this usually indicates a problem with one or both
of the M1002 current amplifier modules and possibly damage to the M1012 voltage amplifier board.
Note: Any of the Molex cables from the M1011 circuit board to the M1012 input board as well as the
M1002 current amplifiers can cause the protect LED to stay on or sample on and off.
misaligned pin connections or see if the ribbon cables have been cut or pinched through their insulation.
c) The fan running at full speed on power up usually indicates a problem with the fan circuitry on the
M1013 board, but it can also be caused by M1011 circuit problems. Erratic fan behaviour can be caused
by damaged thermistors located under the M1002 heat sinks.
d) No output on either or both channels can be caused by intermittent push switches at the input.
STEP 2: VISUAL INSPECTION OF INTERNAL CHASSIS
a) After removing the lid, look for any signs of smoke, charring or burnt components. If the M1002
boards have such damage, the M1011, M1012 and M1013 boards may also be damaged even if there is
no similar charring on their components. At the least, there will be some damage to the M1011 voltage
amp board in the form of blown ICs, or possibly open or shorted diodes, LEDs, resistors, transistors or
capacitors. Exploded electrolytic capacitors indicate you have major repairs to the M1002, M1011 and
M1013 boards.
STEP 3: POWER UP PROCEDURE WITHOUT M1002 BOARDS
It is extremely important that you never power up an AP-3000 or AP-3400 without following the
procedure located on the M1011 schematic highlighted within the box drawn in dashed lines. Failure to do
so will possibly result in damaging a good board. This procedure should only be done on a no load
scoped output to insure the rest of the circuit boards are working before installing new or repaired M1011
modules. The output of a fully operational M1011 will give a 70V peak to peak sinusoidal (undistorted)
wave form when a patch plug is attached at Pin #1. If the wave form is distorted or non- existent, or there
is DC offset, do not attempt to connect any M1002 module to the M1011 or you will immediately destroy
the new or repaired M1002 and will also cause more damage to the rest of the amplifier.
Note: M1002?s power supply wires (red, yellow, white, blue and black) must be removed as well as the
input Molex ribbon to the M1002 when attempting to power up an M1011.
STEP 4: DISMANTLING AND REASSEMBLY PRECAUTIONS
a) When removing power supply wires or resoldering wires to eyelets on the M1011 board, double check
that there are no solder bridges or icicles bridging traces or other eyelets. Failure to do so will result in the
destruction of newly installed boards as well as other boards in the unit. Also make sure wire color codes
are correctly oriented in their proper eyelets, and be careful that ribbon cables don?t get pinched or cut
under the M1011 boards as this will result in shut down into the protect mode or even destruction of more
boards.
b) When reinstalling M1002 boards, make sure the output wires, i.e. the red and yellow signal and black
ground wires, are not reversed. If either channels or both are reversed, the amp will stay in protect mode
with the red LED staying on or sampling on and off.
YS # Description
6410 GREEN 3MM LED 1V7 5MA BULK BRT CLR
6411 RED 3MM LED 1V9 5MA BULK BRIGHT
6419 BRIDGE 35A 400V WIRE LEAD GI3504
6425 BAV21 200V 0A25 DIODE T&R
6438 1N4004 400V 1A0 DIODE T&R
6825 1N4148 75V 0A45 DIODE T&R
6934 MR854 400V 3A0 DIODE FAST RECOV
6439 1N5225B 3V0 0W5 ZENER 5% T&R
6440 1N750ARL 4V7 0W5 ZENER 5% T&R
6459 1N4732A 4V7 1W0 ZENER 5% T&R
6461 1N5240BRL 10V0 0W5 ZENER 5% T&R
6450 1N5242B 12V0 0W5 ZENER 5% T&R
6822 1N4745A 16V0 1W0 ZENER 5% T&R
6824 1N5246B 16V0 0W5 ZENER 5% T&R
6432 1N5248B 18V0 0W5 ZENER 5% T&R
6465 1N5250B 20V0 0W5 ZENER 5% T&R
6433 1N5257B 33V0 0W5 ZENER 5% T&R
5101 BC550C TO92 NPN TRANS. T&R
5102 BC560C TO92 PNP TRANS. T&R
5103 MPSA06 TO92 NPN TRANS. T&R
5107 2N5551 TO92 NPN TRANS. T&R
Check for
5113 MPSA42 TO92 NPN TRANS T&R
5114 MPSA92 TO92 PNP TRANS T&R
6854 2N6517 TO92 NPN TRANS.
5105 MPSA13 TO92 NPN DARLINGTONT&R
5106 MPSA63 TO92 PNP DARLINGTONT&R
5123 NJM431L TO92 SHUNT REG T&R2V
6456 BF872 TO202 PNP TRANS.
6873 MJE340 TO126 NPN TRANS
6874 MJE350 TO126 PNP TRANS.
6891 TIP50 TO220 NPN TRANS
6893 MJE5730 TO220 PNP TRANS
6779 MJH11018 TO218 NPN DARLINGTON
6911 BDX54C TO220 PNP DARLINGTON
6912 BDX53C TO220 NPN DARLINGTON
6752 MTP10N15L TO220 N CHAN MOSFET
6923 MTP2P50E TO220 P CHAN MOSFET
6924 MTW10N40E TO247 N CHAN MOSFET
6925 MTP8P20 O220 P CHAN MOSFET
6900 YS6900 (22) TO3 NPN TRANS.
6927 YS6927 (23) TO3 PNP TRANS.
6840 MC33078P IC DUAL OP AMP
6884 NE5532N IC DUAL OP AMP
5190 MBS4992 TO92 8V5 DIAC T&R
6444 MAC224-4 TO220 40A TRIAC 200V
6477 100K 5% 1/4W THERMISTOR T&R 0.2
5401 _10P 500V 5%CAP T&R RAD CER.2"NPO
5404 _27P 100V 10%CAP T&R TUBULAR NPO
5408 _47P 100V 10%CAP T&R BEAD
5410 100P 100V 10%CAP T&R BEAD
5412 220P 100V 10%CAP T&R BEAD
5201 470P 100V 5%CAP T&R RAD CER.2"NPO
5416 470P 50V 10%CAP T&R BEAD
5816 680P 100V 5%CAP T&R RAD CER.2"NPO
5422 __1N 50V 10%CAP T&R BEAD
5273 __1N5 200V 5%CAP T&R RAD CER.2"NPO
5427 __2N2 500V 10%CAP T&R RAD CER.2" YB
6451 __4N7 250V 20%CAP AC Y ONLY RAD10MM
5272 __6N8 100V 5%CAP T&R RADIAL.2"FILM
5204 _10N 100V 10%CAP T&R RADIAL.2"FILM
5834 _10N 250V 20%CAP RAD POLYFILM BULK
5210 _22N 100V 10%CAP T&R RADIAL.2"FILM
6435 _22N 275V 20%CAP AC X2 RAD BLK15MM
5224 _47N 100V 10%CAP T&R RADIAL.2"FILM
5226 _68N 100V 5%CAP T&R RADIAL.2"FILM
5228 100N 100V 5%CAP T&R RADIAL.2"FILM
5314 100N 50V 10%CAP T&R BEAD
5229 150N 63V 10%CAP T&R RADIAL.2"FILM
5882 220N 250V 10%CAP RAD POLYFILM BULK
5234 470N 63V 10%CAP T&R RADIAL.2"FILM
5255 __1U 63V 20%CAP T&R RADIAL ELE.2"
5257 __2U2 63V 20%CAP T&R RADIAL ELE.2"
5259 __4U7 63V 20%CAP T&R RADIAL ELE.2"
5281 _10U 16V 20%CAP NONPOLAR T&R .2"
5629 _10U 160V 20%CAP RADIAL ELECT BULK
5260 _22U 50V 20%CAP T&R RADIAL ELE.2"
5627 _47U 10V 20%CAP NONPOLAR RAD BULK
5267 100U 25V 20%CAP T&R RADIAL ELE.2"
5619 330U 100V 20%CAP RADIAL ELECT BULK
5630 330U 25V 20%CAP RADIAL ELECT BULK
AP3400 Parts List 10/28/98
Qty. YS # Description
3 5621 470U 63V 20%CAP RADIAL ELECT BULK
3 5892 6800U 80V 10%CAP RADIAL ELECT BULK
2 4522 4K7 TRIM POT
6 4400 _10K 25A-AUD/DETENT STYLE"P15"16MM
10 3590 12.0 AMP SWITCH BREAKER WHITE
71 3822 500NH COIL 18AWG 0R000 AIR CORE
24 3820 4UH COIL 14AWG ZOBEL HORIZONTAL
4 3464 WIRE TO BOARD CRIMP 18-24 AWGT/LEAD
5 3465 WIRE TO BOARD CRIMP 16-18 AWG TIN
2 3486 CLIP 250X032 22-18AWG DISCO-LOK
1 3489 CLIP 250X032 18-22AWG DISCO/INSL
4 3490 CLIP 250X032 14-16AWG DISCO/INSL
4 3682 250 MALE PCB TAB BULK ON CATRIGE
4 3447 DUAL BINDING POST TPP3
2 3498 M203-02 PLAIN PC MNT JK SKT
4 3660 FEMALE PC MOUNT XLR NTRX.NC3FPR-H-O
3 3451 0.089 OD SMALL EYELET ELECTROPLATED
19 3542 SE44 LARGE EYELET TIN-PLATED BRASS
10 3630 FAN GUARD METAL 80MM CHROME
1 3860 FAN 80MM X 80MM 40CFM 12VDC
5 3692 HEATSINK THERMALOY 6079-PB
4 3893 AAVID HEATSINK 5811B
5 3894 AAVID 5972-B H/S W/TAB B.O.
2 3501 B52200F006 COMP WASH #4 SMALL
1 3750 VINYL CAP SC 0.500 BLACK 1/2"
3 3789 TERMINAL STRIP (BEAU INTERCONNECT)
4 3806 RECTANGULAR WASHER FOR TRANS SUPPRT
1 8682 #4 TEFLON WASHER .125ID .281OD .031
2 8498 6-32 X 3/8 STEEL PEM STUD
2 8499 6-32X1 STEEL PEM STUD
2 3795 #8 GROUND LUG ZIERICK 505-169
2 3468 8? 3/16 SJT AC LINE CORD STRIP 17"
1 3821 HEYCO #1200 STRAIN RELIEF
1 3521 SIDE ENTRY PCB CONN .156 8POS
1 3541 24 PIN BREAKAWAY 90 .156
2 3543 20 PIN BRKAWAY 90 LOCK .156
4 3593 PCB CONN 90 5 CIR .156
2 8701 4-40 KEPS NUT ZINC
2 8793 4-40 HEX NUT ZINC
16 8760 6-32 KEPS NUT TIN PLATED
16 8800 6-32 KEPS NUT ZINC
5 8854 6-32 X 1/4 HEX NUT ZINC
1 8787 8-32 KEPS NUT ZINC
2 8797 5/16-18 KEPS NUT SJ500
2 3797 TO-247 THERMO CONDUCTIVE PAD
8 3815 TO3 PREGREASED MICA 56-03-2AP
4 3846 TO220 MICA THERMAL CONDUCTOR 56359B
2 4597 22AWG STRAN TC WIR
NPO 4 4599 22AWG SOLID SC WIR T&R
NPO 4 5299 24AWG SOLID SC WIR RAD
NPO 2 4745 5.0W 0R1 5% BLK RES
2 4749 5.0W 0R15 5% BLK RES
NPO 6 4974 1.0W 0R47 5%FLAME PROOF T&R RES
2 4677 1/2W 1R 5% T&R RES
NPO 2 4877 1/4W 1R 5% T&R RES
2 4973 1.0W 1R 5%FLAME PROOF T&R RES
4 4688 1/2W 2R2 5% T&R RES
1 4911 1/4W 2R2 5% T&R RES
2 4748 2.0W 3R9 5% BLK RES
2 4733 5.0W 5R6 5% BLK RES
2 4610 1/4W 10R 2%FLAME PROOF T&R RES
11 4875 1/4W 10R 5% T&R RES
2 4592 1/8W 15R 2%FLAME PROOF T&R RES
2 4591 1/8W 22R1 1%FLAME PROOF T&R RES
2 4607 1/8W 39R 2%FLAME PROOF T&R RES
4 4899 1/4W 39R 5% T&R RES
X7R 9 4817 1/4W 47R 5% T&R RES
2 6134 1/4W 47R 5%MINI T&R RES
6 4811 1/4W 68R 5% T&R RES
2 4593 1/8W 150R 2%FLAME PROOF T&R RES
2 4859 1/4W 150R 5% T&R RES
4 4645 1/8W 220R0 1%FLAME PROOF T&R RES
5 4857 1/4W 220R 5% T&R RES
6 4770 1/4W 249R 1% T&R RES
4 4867 1/4W 270R 5% T&R RES
12 4855 1/4W 330R 5% T&R RES
2 4821 1/4W 470R 5% T&R RES
2 4822 1/4W 820R 5% T&R RES
4 4609 1/8W 1K 2%FLAME PROOF T&R RES
6 4823 1/4W 1K 5% T&R RES
Qty. YS # Description Qty.
1 4854 1/4W 1K2 5% T&R RES 2
8 4624 1/2W 1K5 5% T&R RES 1
2 4824 1/4W 1K5 5% T&R RES 12
2 4847 1/4W 2K2 5% T&R RES 2
1 4804 1/4W 3K 5% T&R RES 8
1 6124 1/4W 3K 5%MINI T&R RES 2
2 4744 5.0W 3K6 5% BLK RES 8
2 4827 1/4W 4K7 5% T&R RES 7
4 4982 1/4W 4K7 5%MINI T&R RES 4
14 4778 1/4W 5K36 1% T&R RES 2
2 4862 1/4W 5K6 5% T&R RES 2
1 4887 1/4W 7K5 5% T&R RES 11
14 4990 1/4W 8K2 5%MINI T&R RES 2
2 4800 1/4W 10K0 1% T&R RES 20
2 4829 1/4W 10K 5% T&R RES 2
2 4775 1/4W 14K0 1% T&R RES 5
18 4630 1/2W 15K 5% T&R RES 10
23 4830 1/4W 15K 5% T&R RES 5
1 4771 1/4W 17K8 1% T&R RES 11
1 6125 1/4W 18K 5%MINI T&R RES 2
5 4885 1/4W 20K 5% T&R RES 4
2 4777 1/4W 21K5 1% T&R RES 2
4 4832 1/4W 22K 5% T&R RES 1
13 4833 1/4W 27K 5% T&R RES 6
1 4840 1/4W 33K 5% T&R RES 6
1 4868 1/4W 36K 5% T&R RES 2
1 4908 1/4W 45K3 1% T&R RES 1
1 4834 1/4W 47K 5% T&R RES 8
4 4836 1/4W 68K 5% T&R RES 6
7 4772 1/4W 82K5 1% T&R RES 6
3 4898 1/4W 91K 5% T&R RES 4
1 4838 1/4W 100K 5% T&R RES 4
1 4776 1/4W 113K 1% T&R RES 2
1 4839 1/4W 150K 5% T&R RES 4
0.333 4668 2.0W 220K 5%10MM BODY T&R RES 2
0.75 4841 1/4W 220K 5% T&R RES 3
3 6126 1/4W 220K 5%MINI T&R RES 4
17 4843 1/4W 470K 5% T&R RES 4
6 6127 1/4W 470K 5%MINI T&R RES 2
64 4844 1/4W 1M 5% T&R RES 1
28 4797 1/4W 1M2 5% T&R RES 1
6 4888 1/4W 4M7 5% T&R RES 2
3 3699 RELAY 2C 01AMP DC48 ???MA PC-S 1
1 3594 9.5" 5C-24AWG RIBBON HEAVY DUT.100" 3
3 3595 17" 8C-24AWG RIBBON HEAVY DUT.100" 1
32 8865 4-40 X 5/16 PAN PH MS SJ500 4
8 8742 4-40 X 3/8 PAN PH TAPTITE JS500 4
19 8861 4-40 X 3/8 PAN PH MS SJ500 1
79 8741 4-40 X 1/2 PAN PH MS JS500 13
43 8871 4-40 X 5/8 PAN PH MS SJ500 2
12 8799 #6 X 1/4 PAN PH TYPE B JS500 2
4 8801 6-32 X 3/8 PAN PH TAPTITE SJ500 1
4 8829 6-32 X 3/8 FLAT PH TAPTITE BO#4 HEA 15
4 8747 6-32 X 1/2 HEX ND MS ZINC 16
2 8761 6-32 X 1/2 PAN PHIL MS ZINC CLEAR 64
4 8806 6-32 X 1/2 PAN PH TAPTITE SJ500 2
7 8802 8-32 X 3/8 PAN QUAD TPTTE SJ500 #6H 7
8 8749 10-32 X 1/2 QDX PH TAPTITE JS500 6
2 8762 10-32 X1/2 TRUSS QUAD TAPTITE JS500 4
2 8833 10-32 X 7/8 HEX CAP GRD 5 SJ500 4
8 8783 10-32 X 1 PAN QUAD TT JS500 BLACK 10
2 8736 5/16-18X2-3/4 GRD 5 HEX BOLT JS500 1
1 3433 0.080 SPACER OD.700 ID.330 PLASTIC 2
2 8663 11/64 NYLON SPACER (MICRO PLASTIC) 66
8 8629 10-32 X 1/4 SPACER PHENOLIC 16
8 3741 .5 SPACER ID-.171 OD-.25 #912-500 2
6 3743 SNAP ON 0.5" SPACER RICHCO 3
4 8679 6-32 X 1/4 X 1.75 NYLON SPACER(HEX) 1
2 8667 SHOULDER WASHER SWS-229 LENGTH 1/8 9
4 8818 3/4 OD X 5/16 ID X .08 THICK WASHER 1
4 3511 #6 FLAT WASHER NYLON 2
4 8485 #6 SPLIT WASHER ZINC 6
3 8491 #10 SPLIT LOCK WASHER BO 10
12 8817 #10 FLAT WASHER BLACK OXIDE 8
7 8850 #10 INT TOOTH LOCKWASHER BO 4
3 8873 1.250ODX5/16ID FENDER WASHER BARE 1
10 3436 DPDT PUSH SW PCMT H BREAK B4 MAKE 2
2 3422 THERMO/BRKR:N/CLOSED OPEN@60C 1
4 1288 AP-3400 T?RD 1
17