Yorkville Sound Visual Inspection Of Front Panel And Fan, AP3400 Parts List 10/28/98

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. Check for 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?spower 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.

AP3400 Parts List 10/28/98

YS #	Description					Qty.	YS #	Description				Qty.	YS #	Description				Qty.
6410	GREEN 3MM LED 1V7 5MA BULK BRT CLR					3	5621	470U 63V 20%CAP RADIAL ELECT BULK				1	4854	1/4W	1K2	5%	T&R RES	2
6411	RED 3MM LED 1V9 5MA BULK BRIGHT					3	5892	6800U 80V 10%CAP RADIAL ELECT BULK				8	4624	1/2W	1K5	5%	T&R RES	1
6419	BRIDGE 35A 400V WIRE LEAD GI3504					2	4522	4K7 TRIM POT				2	4824	1/4W	1K5	5%	T&R RES	12
6425	BAV21	200V 0A25 DIODE T&R				6	4400	_10K 25A-AUD/DETENT STYLE"P15"16MM				2	4847	1/4W	2K2	5%	T&R RES	2
6438	1N4004 400V 1A0 DIODE T&R					10	3590	12.0 AMP SWITCH BREAKER WHITE				1	4804	1/4W	3K	5%	T&R RES	8
6825	1N4148	75V 0A45 DIODE T&R				71	3822	500NH COIL 18AWG 0R000 AIR CORE				1	6124	1/4W	3K	5%MINI	T&R RES	2
6934	MR854	400V 3A0 DIODE FAST RECOV				24	3820	4UH COIL 14AWG ZOBEL HORIZONTAL				2	4744	5.0W	3K6	5%	BLK RES	8
6439	1N5225B		3V0 0W5 ZENER 5% T&R			4	3464	WIRE TO BOARD CRIMP 18-24 AWGT/LEAD				2	4827	1/4W	4K7	5%	T&R RES	7
6440	1N750ARL		4V7 0W5 ZENER 5% T&R			5	3465	WIRE TO BOARD CRIMP 16-18 AWG TIN				4	4982	1/4W	4K7	5%MINI	T&R RES	4
6459	1N4732A		4V7 1W0 ZENER 5% T&R			2	3486	CLIP 250X032 22-18AWG DISCO-LOK				14	4778	1/4W	5K36 1%		T&R RES	2
6461	1N5240BRL 10V0 0W5 ZENER 5% T&R					1	3489	CLIP 250X032 18-22AWG DISCO/INSL				2	4862	1/4W	5K6	5%	T&R RES	2
6450	1N5242B		12V0 0W5 ZENER 5% T&R			4	3490	CLIP 250X032 14-16AWG DISCO/INSL				1	4887	1/4W	7K5	5%	T&R RES	11
6822	1N4745A		16V0 1W0 ZENER 5% T&R			4	3682	250 MALE PCB TAB BULK ON CATRIGE				14	4990	1/4W	8K2	5%MINI	T&R RES	2
6824	1N5246B		16V0 0W5 ZENER 5% T&R			4	3447	DUAL BINDING POST TPP3				2	4800	1/4W 10K0		1%	T&R RES	20
6432	1N5248B		18V0 0W5 ZENER 5% T&R			2	3498	M203-02 PLAIN PC MNT JK SKT				2	4829	1/4W 10K		5%	T&R RES	2
6465	1N5250B		20V0 0W5 ZENER 5% T&R			4	3660	FEMALE PC MOUNT XLR NTRX.NC3FPR-H-O				2	4775	1/4W 14K0		1%	T&R RES	5
6433	1N5257B		33V0 0W5 ZENER 5% T&R			3	3451	0.089 OD SMALL EYELET ELECTROPLATED				18	4630	1/2W 15K		5%	T&R RES	10
5101	BC550C		TO92 NPN TRANS. T&R			19	3542	SE44 LARGE EYELET TIN-PLATED BRASS				23	4830	1/4W 15K		5%	T&R RES	5
5102	BC560C		TO92 PNP TRANS. T&R			10	3630	FAN GUARD METAL			80MM CHROME	1	4771	1/4W 17K8		1%	T&R RES	11
5103	MPSA06		TO92 NPN TRANS. T&R			1	3860	FAN 80MM X 80MM 40CFM 12VDC				1	6125	1/4W 18K		5%MINI	T&R RES	2
5107	2N5551		TO92 NPN TRANS. T&R			5	3692	HEATSINK THERMALOY 6079-PB				5	4885	1/4W 20K		5%	T&R RES	4
5113	MPSA42		TO92 NPN TRANS T&R			4	3893	AAVID HEATSINK 5811B				2	4777	1/4W 21K5		1%	T&R RES	2
5114	MPSA92		TO92 PNP TRANS T&R			5	3894	AAVID 5972-B H/S W/TAB B.O.				4	4832	1/4W 22K		5%	T&R RES	1
6854	2N6517		TO92 NPN TRANS.			2	3501	B52200F006 COMP WASH #4 SMALL				13	4833	1/4W 27K		5%	T&R RES	6
5105	MPSA13		TO92 NPN DARLINGTONT&R			1	3750	VINYL CAP SC 0.500 BLACK 1/2"				1	4840	1/4W 33K		5%	T&R RES	6
5106	MPSA63		TO92 PNP DARLINGTONT&R			3	3789	TERMINAL STRIP (BEAU INTERCONNECT)				1	4868	1/4W 36K		5%	T&R RES	2
5123	NJM431L		TO92	SHUNT REG T&R2V		4	3806	RECTANGULAR WASHER FOR TRANS SUPPRT				1	4908	1/4W 45K3		1%	T&R RES	1
6456	BF872	TO202 PNP TRANS.				1	8682	#4 TEFLON WASHER .125ID .281OD .031				1	4834	1/4W 47K		5%	T&R RES	8
6873	MJE340		TO126 NPN TRANS			2	8498	6-32 X 3/8 STEEL PEM STUD				4	4836	1/4W 68K		5%	T&R RES	6
6874	MJE350		TO126 PNP TRANS.			2	8499	6-32X1 STEEL PEM STUD				7	4772	1/4W 82K5		1%	T&R RES	6
6891	TIP50	TO220 NPN TRANS				2	3795	#8 GROUND LUG ZIERICK 505-169				3	4898	1/4W 91K		5%	T&R RES	4
6893	MJE5730		TO220 PNP TRANS			2	3468	8? 3/16 SJT AC LINE CORD STRIP 17"				1	4838	1/4W 100K		5%	T&R RES	4
6779	MJH11018		TO218 NPN DARLINGTON			1	3821	HEYCO #1200 STRAIN RELIEF				1	4776	1/4W 113K		1%	T&R RES	2
6911	BDX54C		TO220 PNP DARLINGTON			1	3521	SIDE ENTRY PCB CONN .156 8POS				1	4839	1/4W 150K		5%	T&R RES	4
6912	BDX53C		TO220 NPN DARLINGTON			1	3541	24 PIN BREAKAWAY 90 .156				0.333	4668	2.0W 220K		5%10MM BODY T&R RES		2
6752	MTP10N15L TO220 N CHAN MOSFET					2	3543	20 PIN BRKAWAY 90 LOCK .156				0.75	4841	1/4W 220K		5%	T&R RES	3
6923	MTP2P50E		TO220 P CHAN MOSFET			4	3593	PCB CONN 90 5 CIR .156				3	6126	1/4W 220K		5%MINI	T&R RES	4
6924	MTW10N40E TO247 N CHAN MOSFET					2	8701	4-40 KEPS NUT ZINC				17	4843	1/4W 470K		5%	T&R RES	4
6925	MTP8P20		O220 P CHAN MOSFET			2	8793	4-40 HEX NUT ZINC				6	6127	1/4W 470K		5%MINI	T&R RES	2
6900	YS6900 (22) TO3			NPN TRANS.		16	8760	6-32 KEPS NUT TIN PLATED				64	4844	1/4W	1M	5%	T&R RES	1
6927	YS6927 (23) TO3			PNP TRANS.		16	8800	6-32 KEPS NUT ZINC				28	4797	1/4W	1M2	5%	T&R RES	1
6840	MC33078P		IC DUAL OP AMP			5	8854	6-32 X 1/4 HEX NUT ZINC				6	4888	1/4W	4M7	5%	T&R RES	2
6884	NE5532N		IC DUAL OP AMP			1	8787	8-32 KEPS NUT ZINC				3	3699	RELAY 2C 01AMP DC48 ???MA PC-S				1
5190	MBS4992		TO92 8V5 DIAC T&R			2	8797	5/16-18 KEPS NUT SJ500				1	3594	9.5" 5C-24AWG RIBBON HEAVY DUT.100"				3
6444	MAC224-4		TO220 40A TRIAC 200V			2	3797	TO-247 THERMO CONDUCTIVE PAD				3	3595	17" 8C-24AWG RIBBON HEAVY DUT.100"				1
6477	100K 5% 1/4W THERMISTOR T&R 0.2					8	3815	TO3 PREGREASED MICA 56-03-2AP				32	8865	4-40 X 5/16 PAN PH MS SJ500				4
5401	_10P 500V 5%CAP T&R RAD CER.2"NPO					4	3846	TO220 MICA THERMAL CONDUCTOR 56359B				8	8742	4-40 X 3/8 PAN PH TAPTITE JS500				4
5404	_27P 100V 10%CAP T&R TUBULAR NPO					2	4597	22AWG STRAN TC WIR				19	8861	4-40 X 3/8 PAN PH MS SJ500				1
5408	_47P 100V 10%CAP T&R BEAD				NPO	4	4599	22AWG SOLID SC WIR T&R				79	8741	4-40 X 1/2 PAN PH MS JS500				13
5410	100P 100V 10%CAP T&R BEAD				NPO	4	5299	24AWG SOLID SC WIR RAD				43	8871	4-40 X 5/8 PAN PH MS SJ500				2
5412	220P 100V 10%CAP T&R BEAD				NPO	2	4745	5.0W	0R1	5%	BLK RES	12	8799	#6 X 1/4 PAN PH TYPE B JS500				2
5201	470P 100V 5%CAP T&R RAD CER.2"NPO					2	4749	5.0W	0R15 5%		BLK RES	4	8801	6-32 X 3/8 PAN PH TAPTITE SJ500				1
5416	470P 50V 10%CAP T&R BEAD				NPO	6	4974	1.0W	0R47 5%FLAME PROOF T&R RES			4	8829	6-32 X 3/8 FLAT PH TAPTITE BO#4 HEA				15
5816	680P 100V 5%CAP T&R RAD CER.2"NPO					2	4677	1/2W	1R	5%	T&R RES	4	8747	6-32 X 1/2 HEX ND MS ZINC				16
5422	__1N 50V 10%CAP T&R BEAD				NPO	2	4877	1/4W	1R	5%	T&R RES	2	8761	6-32 X 1/2 PAN PHIL MS ZINC CLEAR				64
5273	__1N5 200V 5%CAP T&R RAD CER.2"NPO					2	4973	1.0W	1R	5%FLAME PROOF T&R RES		4	8806	6-32 X 1/2 PAN PH TAPTITE SJ500				2
5427	__2N2 500V 10%CAP T&R RAD CER.2" YB					4	4688	1/2W	2R2	5%	T&R RES	7	8802	8-32 X 3/8 PAN QUAD TPTTE SJ500 #6H				7
6451	__4N7 250V 20%CAP AC Y ONLY RAD10MM					1	4911	1/4W	2R2	5%	T&R RES	8	8749	10-32 X 1/2 QDX PH TAPTITE JS500				6
5272	__6N8 100V 5%CAP T&R RADIAL.2"FILM					2	4748	2.0W	3R9	5%	BLK RES	2	8762	10-32 X1/2 TRUSS QUAD TAPTITE JS500				4
5204	_10N 100V 10%CAP T&R RADIAL.2"FILM					2	4733	5.0W	5R6	5%	BLK RES	2	8833	10-32 X 7/8 HEX CAP GRD 5 SJ500				4
5834	_10N 250V 20%CAP RAD POLYFILM BULK					2	4610	1/4W 10R		2%FLAME PROOF T&R RES		8	8783	10-32 X 1 PAN QUAD TT JS500 BLACK				10
5210	_22N 100V 10%CAP T&R RADIAL.2"FILM					11	4875	1/4W 10R		5%	T&R RES	2	8736	5/16-18X2-3/4 GRD 5 HEX BOLT JS500				1
6435	_22N 275V 20%CAP AC X2 RAD BLK15MM					2	4592	1/8W 15R		2%FLAME PROOF T&R RES		1	3433	0.080 SPACER OD.700 ID.330 PLASTIC				2
5224	_47N 100V 10%CAP T&R RADIAL.2"FILM					2	4591	1/8W 22R1		1%FLAME PROOF T&R RES		2	8663	11/64 NYLON SPACER (MICRO PLASTIC)				66
5226	_68N 100V 5%CAP T&R RADIAL.2"FILM					2	4607	1/8W 39R		2%FLAME PROOF T&R RES		8	8629	10-32 X 1/4 SPACER PHENOLIC				16
5228	100N 100V 5%CAP T&R RADIAL.2"FILM					4	4899	1/4W 39R		5%	T&R RES	8	3741	.5 SPACER ID-.171 OD-.25 #912-500				2
5314	100N 50V 10%CAP T&R BEAD				X7R	9	4817	1/4W 47R		5%	T&R RES	6	3743	SNAP ON 0.5" SPACER RICHCO				3
5229	150N 63V 10%CAP T&R RADIAL.2"FILM					2	6134	1/4W 47R		5%MINI	T&R RES	4	8679	6-32 X 1/4 X 1.75 NYLON SPACER(HEX)				1
5882	220N 250V 10%CAP RAD POLYFILM BULK					6	4811	1/4W 68R		5%	T&R RES	2	8667	SHOULDER WASHER SWS-229 LENGTH 1/8				9
5234	470N 63V 10%CAP T&R RADIAL.2"FILM					2	4593	1/8W 150R		2%FLAME PROOF T&R RES		4	8818	3/4 OD X 5/16 ID X .08 THICK WASHER				1
5255	__1U 63V 20%CAP T&R RADIAL ELE.2"					2	4859	1/4W 150R		5%	T&R RES	4	3511	#6 FLAT WASHER NYLON				2
5257	__2U2 63V 20%CAP T&R RADIAL ELE.2"					4	4645	1/8W 220R0 1%FLAME PROOF T&R RES				4	8485	#6 SPLIT WASHER ZINC				6
5259	__4U7 63V 20%CAP T&R RADIAL ELE.2"					5	4857	1/4W 220R		5%	T&R RES	3	8491	#10 SPLIT LOCK WASHER BO				10
5281	_10U 16V 20%CAP NONPOLAR T&R .2"					6	4770	1/4W 249R		1%	T&R RES	12	8817	#10 FLAT WASHER BLACK OXIDE				8
5629	_10U 160V 20%CAP RADIAL ELECT BULK					4	4867	1/4W 270R		5%	T&R RES	7	8850	#10 INT TOOTH LOCKWASHER BO				4
5260	_22U 50V 20%CAP T&R RADIAL ELE.2"					12	4855	1/4W 330R		5%	T&R RES	3	8873	1.250ODX5/16ID FENDER WASHER BARE				1
5627	_47U 10V 20%CAP NONPOLAR RAD BULK					2	4821	1/4W 470R		5%	T&R RES	10	3436	DPDT PUSH SW PCMT H BREAK B4 MAKE				2
5267	100U 25V 20%CAP T&R RADIAL ELE.2"					2	4822	1/4W 820R		5%	T&R RES	2	3422	THERMO/BRKR:N/CLOSED OPEN@60C				1
5619	330U 100V 20%CAP RADIAL ELECT BULK					4	4609	1/8W	1K	2%FLAME PROOF T&R RES		4	1288	AP-3400			T?RD	1
5630	330U 25V 20%CAP RADIAL ELECT BULK					6	4823	1/4W	1K	5%	T&R RES	17