BOSE 502A, 502B, 502C Schematic

0 (0)

Panaray® Sound System

502 Array, Bass Box and Controller

Service Manual

Reference Number 170310-SM Rev. 03

Electronic Copy Only

CONTENTS
Contents .........................................................................................................................................	2-3
Safety Information.............................................................................................................................	4
Warranty .............................................................................................................................................	4
Specifications ................................................................................................................................	5-7
502®A Array Specifications ...............................................................................................................	5
502B Bass Module Specifications ...................................................................................................	6
502C Controller Specifications ....................................................................................................	6-7
Electrostatic Discharge Sensitive (ESDS) Device Handling .........................................................	8
Parts Lists and Exploded Views ......................................................................................................	8
Parts List Notes .................................................................................................................................	9
Packaging Part List, 502A Array (see Figure 1) ............................................................................	10
Figure 1. 502A Array Packaging View ............................................................................................	10
Packaging Part List, 502B Bass Box (see Figure 2) ....................................................................	11
Figure 2. 502B Bass Box Packaging Exploded View .....................................................................	11
Packaging Part List, 502C Controller (see Figure 3) ...................................................................	12
Figure 3. 502C Controller Packaging View .....................................................................................	12
Main Part List, 502A Array (see Figure 4) .....................................................................................	13
Figure 4. 502A Array Exploded View ..............................................................................................	14
Main Part List, 502B Bass Box (see Figures 5 and 6) .................................................................	15
Figure 5. 502B Bass Box Exploded View .......................................................................................	16
Figure 6. 502B Access Panel and Connector Views ......................................................................	17
Main Part List, 502C Controller (chassis with removable front panel) (see Figure 7) .............	18
Figure 7. 502C Controller Exploded View (removable front panel version) ....................................	19
Main Part List, 502C Controller (one-piece chassis) (see Figure 8)...........................................	20
Figure 8. 502C Controller Exploded View (one-piece chassis version) ..........................................	20
Electrical Part Lists ...................................................................................................................	21-30
502C Controller Main PCB Assembly ......................................................................................	21-30
Disassembly Procedures ...............................................................................................................	31
502A Array Procedures .............................................................................................................	31-34
Figure 9. 502A Array Exploded View ..............................................................................................	32
Figure 10. 502A Array Wiring Diagram ...........................................................................................	33
502B Bass Module Procedures ...............................................................................................	34-35
502C Controller Disassembly Procedures .............................................................................	35-36
Figure 11. 502B Bass Module Exploded View ................................................................................	37
Figure 12. 502B Bass Module Connector and Access Panel .........................................................	38
Figure 13. 502B Bass Module Wiring Diagrams ............................................................................	39
Figure 14. 502C Controller Exploded View (removable front panel version) .................................	40
Figure 15. 502C Controller Exploded View (one-piece chassis version) ........................................	40
Test Procedures ..............................................................................................................................	41
502A Array Test Procedures ...........................................................................................................	41
Figure 16. XLR input pin assignment ............................................................................................	41
502B Bass Module Test Procedures .......................................................................................	41-42
502C Controller Test Procedures ............................................................................................	42-44
Figure 17. Unbalanced Connections ..............................................................................................	45
Figure 18. 502C Controller Back Panel (Barrier Strip Version Shown)...........................................	45
Accessory Kit Part Lists ...........................................................................................................	46-51
502A PSA-5 Stand Adapter Parts List (see Figure 19) .................................................................	46
Figure 19. PSA-5 Stand Adapter Kit ...............................................................................................	46
502A CSB-5A Suspension Bracket Kit Parts List (see Figure 20) ..............................................	47
Figure 20. CSB-5A Suspension Bracket Kit ...................................................................................	47

	CONTENTS
502B CSB-5B Suspension Bracket Kit Parts List (see Figure 21) ..............................................		48
Figure 21. CSB-5B Suspension Bracket Kit ...................................................................................		48
502A WBP-5 Bi-Pivot Bracket Kit Parts List (see Figure 22) .......................................................		49
Figure 22. WBP-5 Bi-Pivot Bracket Kit ...........................................................................................		49
502A WCB-5 U-Bracket Kit Parts List (see Figure 23) .................................................................		50
Figure 23. WCB-5 U-Bracket Kit ....................................................................................................		50
502A CVT-5 Transformer Assembly Kit Parts List (Figure 24) ....................................................		51
Figure 24. CVT-5 Exploded View and Packaging ...........................................................................		51
Figure 25. CVT-5 Schematic ..........................................................................................................		52
Theory of Operation ..................................................................................................................		53-55
502C Controller ...............................................................................................................................		53
1.	Differential Input Stage ...............................................................................................................	53
2.	Equalizer for High Frequency Outputs .....................................................................................	53
3.	Output mode switch, Low frequency level control, and Normal/Sum mode stage ..............	53
4.	Equalizer for Low Frequency Outputs ......................................................................................	53
5. Mode switch ................................................................................................................................		53
6.	Output stage ................................................................................................................................	54
7.	Power Supply ..............................................................................................................................	54
8.	Turn On/Off Muting Circuit .........................................................................................................	54
9.	Troubleshooting Tips ............................................................................................................	54-55
502C Controller EQ Curves ......................................................................................................		56-61
Figure 26. Low Frequency EQ ........................................................................................................		56
Figure 27. Low Frequency EQ ........................................................................................................		56
Figure 28. Low Frequency EQ ........................................................................................................		57
Figure 29. Low Frequency EQ ........................................................................................................		57
Figure 30. High Frequency EQ .......................................................................................................		58
Figure 31. High Frequency EQ .......................................................................................................		58
Figure 32. High Frequency EQ .......................................................................................................		59
Figure 33. High Frequency EQ .......................................................................................................		59
Figure 34. High Frequency EQ .......................................................................................................		60
Figure 35. High Frequency EQ .......................................................................................................		60
Figure 36. High Frequency EQ .......................................................................................................		61
Figure 37. 502C Controller Block Diagram .....................................................................................		62
Service Manual Revision History...................................................................................................		63

SAFETY INFORMATION

1.Parts that have special safety characteristics are identified by the symbol on schematics or by special notes on the parts list. Use only replacement parts that have critical characteristics recommended by the manufacturer.

2.Make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit before returning the unit to the customer.

Use the following checks to perform these measurements:

A.Leakage Current Hot Check - With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI) C101.1 "Leakage Current for Appliances" and Underwriters Laboratories (UL) UL6500 / UL60065 / IEC 60065 paragraph 9.1.1. With the unit AC switch first in the ON position and then in OFF position, measure from a known earth ground (metal waterpipe, conduit, etc.) to all exposed metal parts of the unit (antennas, handle bracket, metal cabinet, screwheads, metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chassis. Any current measured must not exceed 0.5 milliamp. Reverse the unit power cord plug in the outlet and repeat test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE UNIT TO THE CUSTOMER.

B.Insulation Resistance Test Cold Check - (1) Unplug the power supply and connect a jumper wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3) Measure the resistance with an ohmmeter between the jumpered AC plug and each exposed metallic cabinet part on the unit. When testing 3 wire products, the resistance measured to the product enclosure should be between 2 and infinite MOhms. Also, the resistance measured to exposed input/output connectors should be between 4 and infinite MOhms. When testing 2 wire products, the resistance measured to exposed input/output connectors should be between 4 and infinite MOhms. If it is not within the limits specified, there is the possibility of a shock hazard, and the unit must be repaired and rechecked before it is returned to the customer.

CAUTION: The Bose® Panaray® 502® Sound System contains no user-serviceable parts. To prevent warranty infractions, refer servicing to warranty service stations or factory service.

PROPRIETARY INFORMATION

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF

BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR

THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT

BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF

THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR

USED FOR ANY OTHER PURPOSE.

WARRANTY

The Bose Panaray 502C Controller is covered by a limited 1-year warranty. The Panaray 502A array speaker and Panaray 502B bass module are covered by a 5-year limited warranty.

SPECIFICATIONS

502A Array Specifications
Dimensions:	23.5"H x 5.75"W x 6.73"D
	(59.7x14.6x17.1 cm)
Weight:	15 lbs. (6.8 kg.)
Transducer Complement:	5 - 4.5 " (11.4 cm) drivers
Enclosure Material:	High-impact polystyrene
Nominal Impedance:	8 Ohms, 6.4 Ohms minimum
Sensitivity:	90 dB SPL (1W, 1m, 130 Hz-15 kHz)
Maximum Acoustic Output:	112 dB SPL average, 121 dB SPL peak
Frequency Range:	130 Hz - 15 kHz
Port Tuning Frequency:	135 Hz
Amplifier Power (Recommended):	150 - 600 watts continuous into 8 Ohms
Long-term power handling:	150 watts continuous
Beamwidth:	120° horizontal, 70° vertical
Input Connections:	Parallel wired barrier strip (US/Can.)
	Parallel wired XLR (Euro/Aus/UK/Japan)
Fusing:	4 ampere AGC (Buss) or 3AG (Littlefuse)

SPECIFICATIONS

502B Bass Module Specifications

Dimensions:		31.0"H x 14.0"W x 15.5"D
		(78.7x 35.6x 39.4 cm)
Weight:		80 lbs. (36.4 kg.)
Transducer Complement:		1 - 12" woofer (high power)
Enclosure Material:		3/4" resin-core, vinyl wrapped
Port:		High-impact polystyrene
Nominal Impedance:		8 Ohms, 6.4 Ohms minimum
Sensitivity:		90 dB SPL (1W, 1m, 55 Hz-150 Hz)
Maximum Acoustic Output:		115 dB SPL average, 122 dB SPL peak
Frequency Range:		50 Hz - 150 Hz
Power Handling:		450 watts continuous
Amplifier Power (Recommended):		450 - 1200 watts continuous into 8 Ohms
Input Connections:		2 parallel wired barrier strip (US/Can)
		2 parallel wired XLR (Euro/Aus/UK/Japan)
		2 parallel wired Speakon® connectors
Fusing:		7 ampere AGC (Buss) or 3AG (Littlefuse)
502C Controller Specifications
Dimensions:	120V/Barrier Strip	1.75"Hx19.0"Wx8.75"D (4.4x48.3x22.2cm)
	220-240V/XLR	1.75"Hx19.0"Wx8.0"D (4.4x48.3x20.3cm)
Weight:		5.5 lbs. (2.5 kg.)
Chassis material:		16 gauge steel with painted/zinc coated finish
Cover plate material:		Brushed aluminum,painted
Input Connections:		Balanced barrier strip (US/Can)
		Balanced XLR (Euro/Aus/UK/Japan)
Output Connections:		Balanced barrier strip (US/Can)
		Balanced High frequency & Low frequency
		XLR (Euro/Aus/UK/Japan)

SPECIFICATIONS

502C Controller Specifications (continued)

Input Impedance:	Balanced input, -10 dB level - 14k Ohms
	Balanced input, +4 dB level - 6k Ohms
	Unbalanced input (+ input), -10 dB level: 12k Ohms
	Unbalanced input (+ input), +4 dB level: 4k Ohms
Output Impedance:	100	Ohms nominal
Input Level:	-10 dB or +4dB, selectable
Output Level:	8.0 Vrms maximum into 600 Ohms
Low Frequency (LF) Output Mode:	Sum or normal
LF Output Level:	-18 dB to +3 dB, variable
Crossover Frequency:	140	Hz (Bi-amp), Roll-off slope: -18dB/octave
THD:	Midrange distortion of HF output: - 0.1% at 5V, 600 Hz
	Low frequency distortion of LF out: - 0.1 % at 5V, 80 Hz
Output Noise:	Bi-amp mode, HF outputs - 90µV
	Bi-amp mode, LF outputs - 40µV
	Passive mode, - 90µV
Offset:	All channels - 15mV
Power Requirements:	120	VAC,50/60 Hz, 12 watts (US/Can)
	230	VAC,50/60 Hz, 12 watts (Euro)
	100	VAC,50/60 Hz, 12 watts (Japan)
	240	VAC,50/60 Hz, 12 watts (Aus/UK)

ELECTROSTATIC DISCHARGE SENSITIVE (ESDS)

DEVICE HANDLING

This unit contains ESDS devices. We recommend the following precautions when repairing, replacing or transporting ESDS devices:

•Perform work at an electrically grounded work station.

•Wear wrist straps that connect to the station or heel straps that connect to conductive floor mats.

•Avoid touching the leads or contacts of ESDS devices or PC boards even if properly grounded. Handle boards by the edges only.

•Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags, bubble wrap or plastic trays.

PARTS LISTS AND EXPLODED VIEWS

The following section contains parts lists and exploded views for the Panaray® sound system. The parts lists are broken down as follows:

-502®A Array Parts List and Exploded View

-502A Packaging Parts List and Exploded View

-502B Bass Box Parts List and Exploded View

-502B Packaging Parts List and Exploded View

-502C Controller Main Assembly Parts List and Exploded View

-502C Packaging Parts List and Exploded View

-502C Electrical Parts List

-Accessory Kits Parts Lists and Exploded Views

NOTE: The notes section for the entire parts list is contained on page 8.

CAUTION: Use only accessory kit parts that are specified by Bose® Corporation in this service manual. Substitute parts may not have the same safety characteristicsas the original parts.

PARTS LIST NOTES

1. This part is not normally available from Customer Service. Approval from the Field Service Manager is required before ordering.

2.This part splits into 2 pieces. Each piece fits onto a corner of the bass box.

3.Current European units should contain 2 owner's manuals: the original version, P/N 143585, and the German version of the owner's manual, P/N 171941. Future production units (except in North America) will contain owner's manuals in 5 languages (German, French, Italian, Spanish and English).

4.This illustration is typical of the internal layout of the 502® except as follows: (1) Barrier strip connectors are used in the US/Canada version only. XLR connectors are used on all non-US versions, and (2) The nut connected to the line cord is used on the US/Canada, UK and Australian units only.

5. This part is critical for safety purposes. Failure to use a substitute replacement with the same safety characteristics as the recommended replacement part might create shock, fire and/ or other hazards.

6. Refer to the 502C Electrical Parts List for components located on the PCB assembly.

7. This part is not illustrated.

8. These screws hold regulators U13 and U14 to the heatsink.

9. Early production runs of the 502C have 4 screws (instead of 2) that secure the cover to the chassis.

10. Early production runs of the 502C with XLR connectors have 12 screws (instead of 6) that secure the connectors to the chassis.

11. Early production runs of the 502C have 6 screws (instead of 4) that secure the front plate to the cover and chassis.

12. Early production runs of the 502C with XLR connectors have 5 screws (instead of 2) that secure the PCB to the chassis.

13. The line cord assembly consists of the following items:

(1)Line Cord-P/N 147428 (US/Canada), P/N 147430 (Euro), P/N 147429 (Japan), P/N 149025 (UK), P/N 149026 (Aus.),

(2)Strain Relief Bushing - P/N 144010 (US/Canada/UK/Aus), P/N 144011 (Euro/Japan),

(3)Connector Housing - P/N143964, and

(4)Connector Pin - P/N 143992. These parts are all safety controlled components. See Note 5.

PACKAGING PART LIST

502A Array (see Figure 1)

Item	Description	XLR and Barrier	*Speakon	Qty	Note
Number		Version Product	Version
		code 003840,	Product
		004931, 004932	code
		and 004933	040170 and
			040171
1	Literature Kit-Panaray®	149271	-	1
	which consists of:
A	Polybag	103351	103351	1
B	Owner's Manual	143585	292721
C	Registration Card	122157	-
D	Warranty Service List	122766	-
E	Envelope	122785	-
2	Packing, Foam	143573	172321	2
3	Polybag	106595	-	1
4	Carton, 502A	143572	172541	1

*Product code 040170 (gray) and 040171 (white) are the RoHS compliant version of the 502A. Only RoHS compliant parts listed in the above chart can be used in the 502A with product code 040170 and 040171.1

Figure 1. 502A Array Packaging View

PACKAGING PART LIST

502B Bass Box (see Figure 2)

Item	Description	XLR and Barrier	*Speakon®	Qty	Note
Number		Version	Version PC
		PC 003841,	040090 and
		019769, 004934,	040091
		004935, 004936,
		007698
1	Literature Kit-Panaray®	149271	-	1
	Which consists of:
A	Polybag	103351	103351	1
B	Owners Manual	143585	292040	1
C	Registration Card	122157	-	1
D	Warranty Service List	122766	-	1
E	Envelope	122785	-	1
2	Packing End Cap, EPS	139955	-	4	2
	(XLR and Barrier versions)
	Packing End Cap, EP	-	258886
	(Speakon version)
3	Polybag	119320	119320	1
4	Carton, 502B	143558	258887	1

*Product code 040090 (black) and 040091 (white) are a RoHS compliant version of the 502B. Only RoHS compliant parts listed in the above chart can be used in the

502B with product code 040090 and 040091.

Figure 2. 502B Bass Box Packaging Exploded View

PACKAGING PART LIST

502C Controller (see Figure 3)

Item	Description	Part Number	Qty.	Note
Number
1	Crease Sheet, Die Cut	149823	1
2	Literature Kit, Panaray®, Consists of:	149271	1
A	Poly bag	103351	1
B	Owner's Manual	143585	1
	Owner's Manual (German language)	171941	1	3
C	Card, Registration	122157	1
D	List, Warranty Service	122766	1
E	Envelope	122785	1
3	Poly bag	110892	1
4	Insert	148354	1
5	Carton, 502C	148353	1

Figure 3. 502C Controller Packaging View

MAIN PART LIST

502A Array (see Figure 4)

Item	Description	Part Number	Qty.	Note
Number
1	Grille, Pro Gray	142342-01	1
	Grille, Arctic White	142342-02
2	Insert, Threaded, Mach, M8x10.5, Gray	143552-01	2
	Insert, Threaded, Mach, M8x10.5, Wht	143552-02
3	Nameplate, Dark Gray/Arctic White	130718-1B21	1
	Nameplate, Dark Arctic White/Dark Gray	130718-1C31
4	Nut, Push-On,.078	125786	2
5	Driver, 4.5”	291025-001	5
6	Screw, HIRS, 8-10x5/8, PAN, XRC/SQ	289388-010	20
7	Gasket, Driver, 4.5"	128407	5
8	1234356789 89 89 89	119094-3R0	1
9	Capacitor, 5µF, Mylar	102770	1
10	Tape, Foam	118223	2
11	Terminal, Connector, Wire wrap	118008	4
12	Inductor, .75mH, Air core	293515-001	1
13	Washer, Flat Aluminum	123840	1
14	Gasket, Connector Panel	290316-001	1
15	Screw, 8-10, OVL HD, 1/2", BK (Gray)	148378-08	4	Non-RoHS
	Screw-8-10, OVL HD, 1/2", Zn (White)	148379-08		Non-RoHS
	Screw, Tapp, 8-10x .5, OVL CSK, BLK	290978-08		RoHS
16	Connector Panel, XLR, Gray	142344-01	1	Non-RoHS
	Connector Panel, XLR, White	142344-02		Non-RoHS
	Connector Panel, Barrier, Gray	142344-03		Non-RoHS
	Connector Panel, Barrier, White	142344-04		Non-RoHS
	Connector Panel, Speakon®, Gray	287072-003		RoHS
	Connector Panel, Speakon, White	287072-002		RoHS
17	Fuse holder, Knob with O-Ring	149268	1
18	Fuse-Standard Delay, 4A	104715-400	1
19	Fuse holder Body	149269	1
20	Washer, Neoprene	149270	1
21	Screw, Tapp, 4-16x1/2, PAN (XLR)	145724-08	4	Non-RoHS
	Screw, HIRS, 8-10x3/4, PAN (Barrier)	137527-12	2	Non-RoHS
	Screw, M2.6x5/8, Phillips, Flat (Speakon)	-	4	RoHS
22	Connector, XLR, Dual	145717	1	Non-RoHS
	Connector, Barrier Strip, 4 pos.	148976-04	1	Non-RoHS
	Connector, Speakon, Panel Mount	258213	2	Non-RoHS
23	Gasket, XLR Connector	146874	1	Non-RoHS
	Gasket, Barrier	171243	1	Non-RoHS
	Gasket, Speakon (inc. with item 22)	-	2	RoHS
24	Batting, Polyester	142360	2
25	Foam, Acoustic	142361	1
26	Fuse holder Nut	171731	1

Product code 040170 (gray) and 040171 (white) are a RoHS compliant version of the 502A. Only RoHS compliant parts listed in the above chart can be used in the 502A with product code 040170 and 040171.

2x 2

5x 7

5x 5

15x 6

19 17 18

21	23

24 2x

4x 11

2x 10

	15 4x
13	XLR VARIATION
12	14 SHOWN

		17		17
	19	18		18
26	19	18		20 19
26	20		16	20 19
	16		16
	16		26
	26		26
	26
		21 2x		21 2x
		22		22
		23		23

Figure 4. 502A Array Exploded View

MAIN PART LIST

502B Bass Box (see Figures 5 and 6)


Item	Description	Part Number	Qty.	Note
Number
1	Cap, Top/Bottom, Gray	182582-0P	2
	Cap, Top/Bottom, White	294312
2	Bolt-Mounting	143580	8
3	Acoustic Foam	145705	3
4	Bracket, Structural	290979	4
5	Nut, Hex, Mach Screw, 7/16-14	290980-4414	8
6	Washer, Lock, Ext, Stl, Zinc Plate	108261-43	8
7	Screw, HIRS, 8-10x3/4, HEXW, Hex	293205-010	16
8	Safety, Hook	171556	2
9	Screw, 6-10x1/2,PAN,XRC/SQ	290294-08	4
10	Access Panel, Gray, XLR	142349-8RU	1	Non-RoHS
	Access Panel, White, XLR	142349-9RU	1	Non-RoHS
	Access Panel, Gray, Barrier	142349-8SU	1	Non-RoHS
	Access Panel, White, Barrier	142349-9SU	1	Non-RoHS
	Access Panel, 502 BEX, Black	142349-0CP	1	Non-RoHS
	Access Panel, Gray, Speakon	292035-001	1	RoHS
	Access Panel, White, Speakon	292035-002	1	RoHS
11	Fuse holder, Knob with O-Ring	149268	1
12	Fuse holder Body (includes nut)	149269	1
13	Washer, Neoprene	149270	1
14	Fuse, Standard Delay,7A	104715-700	1
15	Foam Tape	103068	4
16	Screw, Tapp, 4-16x1/2, (XLR)	145724-08	8	Non-RoHS
	Screw, HIRS, 8-10x3/4, (Barrier)	289388-16	2	RoHS
	Screw, Tapp, 8-11x1, (Speakon)	290988-08	4	RoHS
17	Connector , XLR, Dual	145717	2	Non-RoHS
	Connector, Barrier Strip, 4 pos.	148976-04	1	RoHS
	Connector, Speakon	258213-002	2	RoHS
18	Gasket, XLR Connector	146874	2	Non-RoHS
	Gasket, Barrier	171243	1	RoHS
	Gasket, Speakon	252384	2	RoHS
19	Fuse holder Nut	171731	1
20	Insert, Barbed, 10/32”x 20mm	145712-03	8
21	Screw, Mach, 10-32x 1-1½, PAN	291008-24	8
22	Woofer, 12”	144392	1	Non-RoHS
	(used with PC 003841, 019769, 004934,
	004935, 004936, 007698 and 010744 only)
	Woofer, 12”	291380-001		RoHS
	(used with PC 040090 and 040091 only)
23	Screw, Mach, 8-10 x 1, PAN, Gray	289388-016	12
	Screw, Mach, 8-10 x 1, PAN, White	289388-016	12

*Product code 040090 (black) and 040091 (white) are a RoHS compliant version of the 502B. Only RoHS compliant parts listed in the above chart can be used in the 502B with product code 040090 and 040091.

Figure 5. 502B Bass Box Exploded View

Barrier Strip Version				XLR Version

16 17 18

Speakon® Version

Figure 6. 502B Access Panel and Connector Views

MAIN PART LIST

502C Controller (removable front panel version) (see Figure 7)

Item	Description	Part Number	Qty.	Note
Number
1	Cover, Chassis, 502C	173003	1
2	Screw, Tapp, 4-40x.375, PAN, TORX	170284-06	2	9
	(US/Can.)
	Screw, Tapp, 4-40x.375, PAN, TORX	170284-06	8	9,10
	(Euro/UK/Aus/Japan)
3	Plate, Front, Rack Mount Kit	173004	1
4	Screw, Tapp, 4-40x.312, BTN, XREC	170285-05	4	11
5	Lens, LED, Clear, Front Panel	144023	1
6	Switch, Rocker, SPST, AC Power	143960	1	5
7	PCB Assembly, 502C (US/Can)	143940-1	1	1, 6
	PCB Assembly, 502C	143940-2	1	1, 6
	(Euro/UK/Aus/Japan)
8	Screw, Mach, 4-40x.25, PAN, TORX	171796-04	5	12
	(US/Can)
	Screw, Mach, 4-40x.25, PAN, TORX	171796-04	2
	(Euro/UK/Aus/Japan)
9	Transformer, 120V (US/Can.)	143950-1	1	5
	Transformer, 220-240V (Euro/UK/Aus)	143950-2
	Transformer, 100V (Japan)	143950-3
10	Nut, Hex, STND, Washer, KEPS	118260-08	2
11	Insulator, Standoff, PCB	143948	1	1, 5

12	Connector, Barrier Strip Assy,	143971	3
	6 position (US/Can.)
13	Screw, Tapp, 4-40x.5, PAN, TORX	170284-08	6
	(US/Can.)
14	Nut, Hex, #8-32, Steel (US/Can/UK/Aus.)	103237-832	1
15	Line Cord, 3 wire (US/Can.)	143975	1	5, 13
	Line Cord, 2 wire (Euro)	143977
	Line Cord, 2 wire (Japan)	143976
	Line Cord, 3 wire (UK)	149023
	Line Cord, 3 wire (Aus)	149024
16	Heatsink, PCB Mount	147165	1	1
-	Screw, Tapp, 4-40x.375, PAN, XREC	170284-06	4	7, 8
-	Chassis, 502, US/Canada	173002-01	1	1
	Euro/UK/AUS/Japan	173002-02	1

Figure 7. 502C Controller Exploded View (removable front panel version)

MAIN PART LIST

502C Controller (one-piece chassis version) (see Figure 8)

Item	Description	Part Number	Qty/	Note
Number			Assy.
1	Screw, 6-32, Mach, Flat, Xrec	190623-008	5
2	Screw, Mach, 4-40x.25, PAN, XREC	103140-04	9
3	Clip, Heatsink	188599	2
4	XFMR, US/Canada/Japan, 100V/120V	180128-1	1	5
	EUR/AUS/UK, 220V/240V	180128-2	1
5	Nut, Hex, 8-32, Keps	118260-08	3
6	Insulator, 9.25x7.56x.015, D/C	143948	1	1, 5
7	Switch, Power, Rocker, SPST	143960	1	5
8	Lens, LED, Clear, Chassis	144023	1
9	Chassis, 502®, US/Canada	198373-001	1	1
	Euro/UK/AUS/Japan	198373-002	1
10	Screw, Tapp, 4-40x.375, PAN, XREC	170284-06	6
11	PCB Assy, 502 (all versions)	143940-2	1	1, 6
12	Cover, Chassis, Controller	198374-001	1
13	Line Cord, 3-Wire, USA/Canada	173242	1	5
	2-Wire, EU	173243	1
	2-Wire, Japan	173244	1
	3-Wire, UK	173245	1
	3-Wire, Aus	173246	1
14	Tape, Foam, 0.50"	198408	1
	1
	5X

13
			2
5
		3	12
		3
9			2
C114	C113
4
		4
14
	5	2X	11
			11
	6
			10
			6X

Figure 8. 502C Controller Exploded View (one-piece chassis version)

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