Page 1
Compositions Series
Overture 3
Powered Loudspeakers
Service Manual
Infinity Systems, Inc
250 Crossways Park Dr.
Woodbury, New York 11797
Rev1 5/2004
Page 2
Overture 3
TABLE OF CONTENTS
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . ……. . . . .3
DETAILED SPECIFIC ATI ONS . . . . . . . . . . . . . .. . . . . . . . . . …… . . . . .4
WIRING THE SYSTEM . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . …….. . . . .5
OPERATING THE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . ……. . . . .6
REPLACING THE FUSE . . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . ……. . . .7
CARE OF YOUR SPEAKER SYSTEM/TROUBLESHOOTING . ….…. .10
MECHANICAL/PACKAGING PARTS LIST . . . ……….……………... . . .11
EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . …………... . . . . . . .12
PACKAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ……. . . . . . . . . .13
SERVICE BULLETIN INF9704 NOV. 1997 …………………………….....14
SERVICE BULLETIN INF9705 NOV. 1997 . . .. . . . . …………. . . . . . . .16
SERVICE BULLETIN INF9802 JUNE 1998. . .. . . . . …………. . . . . . . .17
TEST SET UP AND PROCEDURE . . . . . . . . ........................................18
NOTE ON OVTR 2/3 AMPLIFIER REVISION……………………………..19
PCB DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . ……... . . . . . . . . . . . .20
ELECTRICAL PARTS LIST (120V) . . . . . .. . . . . . . …………………. . . .22
ELECTRICAL PARTS LIST (230V) . . . . . . . . . . . . . . . . …... . . . . . . . . .25
INTEGRATED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . ……. . . . . . . . . .28
WIRING DIAGRAM/CROSSOVER NETWORK SCHEMATIC (120V) . . .29
WIRING DIAGRAM/CROSSOVER NETWORK SCHEMATIC (230V) . . .30
120V SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . … . . . .31
230V SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . .. . . . …….. . . . . . . . .34
Infinity continually strives to update and impr ov e exi sti ng pr oduc ts, as well as create new ones. The
specifications and construction details in this and related Infinity publi c ations are therefore subject to
change without notice.
2
Page 3
Overture 3
3
Specifications
Overture 3 Frequency Response: 25Hz - 20,000Hz (±3dB)
Recommended Amplifier Power Range 10-200 watts*
Amplifier Peak Output: 500VA
Maximum Output: 115 dB SPL
Sensitivity: 94 dB 2.83V @ 1 meter
Nominal Impedance: 8Ω
Crossover Frequencies: 350 and 3,000Hz
Low-Frequency Driver: (4) 6-1/2” (165mm) high efficiency,
dynamically balanced, magnetically
shielded woofers.
Midrange Driver: (2) 5-1/4” (125mm) high-efficiency,
magnetically shielded midrange drivers.
High-Frequency Driver: (1) 1” (25mm) soft dome, high-
efficiency, neodymium magnet,
magnetically shielded tweeter.
Dimensions (H x W x D): 46" x 6-7/8" x 15-3/4"
(1,168mm x 175mm x 400mm)
Weight: 59 lb/(26.8 kg)
Power Consumption: 300 watts (Maximum)
* The maximum recommended amplifier power rating will ensure proper system headroom to allow
for occasional peaks. We do not recommend sustained operation at these maximum power levels.
Page 4
Detailed Specifications
Overture 3
4
Page 5
Overture 3
5
Wiring The System
Page 6
Overture 3
6
Operating The System
Page 7
Overture 3
7
Operating The System/Replacing The Fuse
Page 8
Overture 3
8
Replacing the Fuse (Cont.)
Page 9
Overture 3
9
Replacing The Fuse (Cont.)
UTILSER UN FUSIBLE DE
RECHANGE DE MEME TYPE ET
CALIBRE
FOR CONTINUED PROTECTION AGAINST
RISK OF FIRE, REPLACE ONLY WITH SAME
TYPE OF FUSE: T1.6A 250V
CAUTION:
ATTENTION:
POWER FUSE
T 1.6A 250V
~ 230V 50Hz
150W MAX
00435
F
U
S
E
F
U
S
E
FUSE T3, 1.6A
250V
OVTR 2 & 3 FUSE
Page 10
Overture 3
10
Troubleshooting
Page 11
Overture 3
11
Mechanical Parts List
Ref No. Description Qty Part No.
1 CABINET NOT FOR SALE
2 6.5”, WOOFER, B160-4 (120V) DCR = 14.2Ω±10% 4 330618-001
6.5”, WOOFER, LM-B160-8 (230V) DCR = 40Ω±10% 4 333773-001
3 SCREW, #8 x .75”, PPH, ZINC 25 900102-012
4 REAR WOOFER GRILLE 2 330955-001
5 FRONT/REAR WOOFER BAFFLE 4 332334-001
6 AMPLIFIER CAP 1 331399-001
7 CROSSOVER NETWORK (120V) 1 334416-001
8 BASE, FRONT FOOT 1 331184-001
9 REAR BASE 1 331075-002
10 REAR BASE w/PORT 1 331236-001
11 BINDING POST (RED) 1 331723-001
12 BINDING POST (BLACK) 1 331724-001
13 SCREW, #8 x 1” PPH, ZINC 15 900102-016
14 SCREW, #6-32 x 3/8” PPHMS CADCAD PLATED 2 10811
15 AMPLIFIER 1 NOT FOR SALE
16 1” (25MM) NEODYMIUM TWEETER DCR = 3.6Ω±10% 1 333232-001
17 UPPER FRONT BAFFLE (120V) 1 331182-001
UPPER FRONT BAFFLE (230V) 1 332335-002
18 FRONT GRILLE 1 333584-001
19 SCREW, #6 x 3/4” PPHD, BLK 20 63563
20 SCREW, 4-40 x .25” PPH, ZINC 2 905502-004
21 5.25”,MIDRANGE TRANSDUCER, B125-6 DCR = 7.7Ω±10% 2 330650-001
22 MIDRANGE CUP (120V) 1 330833-001
23 HI-FREQ. TWEETER GASKET 1 331725-001
PACKAGING
24 SPIKE FOOT SET, 1.5” 1 331360-001
25 OUTER CARTON (120V) 1 331246-001
26 FOAM PAD, TOP 1 331254-001
27 FOAM PAD, BOTTOM 1 331255-001
28 SURVEY CARD 1 330033-001
29 OWNER’S MANUAL (120V) 1 332293-001
30 SAFETY SHEET 1 330100-001
31 LINE FUSE 5A 2AG SLO-BLO (120V) 2 FS1068 or 331925-001
Page 12
Overture 3
12
Exploded View
1
2
3
4
5
19
4
3
2
7
8
10
11
12
13
13
14
2
15
6
3
5
19
18
19
17
16
3
21
20
22
9
00437
23
Page 13
Overture 3
13
Packaging
Page 14
Overture 3
14
Page 15
Overture 3
15
Page 16
Overture 3
16
Page 17
Overture 3
17
Page 18
Overture 3
18
Test Set Up and Procedure
SIGNAL
GENERATOR
AMPLIFIER
AC VOLT
METE R (10V)
OVERTURE 3
UNDER TEST
SPEAKER
OUTPUT
FROM
AMPLIFIER
00421
SYSTEM AURAL SWEEP TEST
Equipment needed:
• Function/signal generator/sweep generator
• High Gain Integrated Amplifier
• Multimeter
• Speaker cables
General Unit Function (UUT = Unit Under Test)
1. From the signal generator, connect a mono cable to the Integrated amplifier; with speaker cables connect the amplifier’s
output to the UUT Speaker binding posts.
2. On the UUT, turn the BASS (level) control full counterclockwise (1).
3. Turn on generator, adjust so that the output at the Integrated amplifier is 2.0V, 40 Hz.
4. Plug in UUT; LED should be Red. Turn BASS (level) control full clockwise (9).
5. LED should now be Green and immediate bass response should be heard (and observed if the grille is removed).
Sweep Function
6. Follow steps 1-5 above.
7. Sweep generator from 20Hz to 300Hz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or any other noises. If
any unusual noises are heard, remove woofers and test.
Driver Function
8. Remove woofer from cabinet; detach + and - wire clips.
9. Check DC resistance of woofer; it should be:
(120v) - 14.2 Ohms ±10%
(230v) - 40.0 Ohms ±10%
10. Connect a pair of speaker cables to driver terminals. Cables should be connected to a high-gain integrated
amplifier fed by a signal generator. Turn on generator and adjust so that speaker level output is 20.0V. *
11. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises.
*
Only the 120v version will be driven to near maximum excursion at this voltage; because of the unusually high DCR of the voice coil,
driving the 230v version at twice this voltage is not practical with simple test equipment and 20v should suffice for test purposes.
Amplifier bias adjustment
1) Power up loudspeaker and drive at low levels for 3 minutes for warm-up.
2) Remove amplifier assembly (disassembly procedure in bulletin INF9704 Page 15).
3) Power up on the bench; attach DMM (on low DC voltage range) across TP1 and TP2 on schematic – R77 - (120v) .22 Ω 5W
fuse resistor. (230v) .47 Ω 5W fuse resistor. Mini-grabbers can be used on the resistor leads without PCB removal.
4) Adjust POT2 (bias pot on PCB) to read 5.9 mV for both 120v and 230v units.
Page 19
IMPORTANT NOTE ON OVTR 2/3 AMPLIFIER REVISION
There was an early version of the Overture 2 and 3 Amplifier that is represented slightly inaccurately in the schematic, PCB drawings, and parts list
in this service manual. This page is a guide to the identification and differences to this earlier version. The drawing below is a later version of the
PCB, complete with this information. NLA = No Longer Available
ORIGINAL VERSION = R80 IS NOT IN
SILKSCREENED AREA, BUT INSTEAD ON
OPPOSITE SIDE OF PCB, CONNECTED
FROM MAIN “+” ON C15, TO COLLECTOR
(CENTER LEAD) ON Q12 (BF469).
Q11 ORIGINAL VERSION = MPSU06
Q11 LATER VERSION = 2SD2012
(DO NOT SUBSTITUTE - PIN LAYOUT
DIFFERENT !)
MPSU06 part# NLA
ORIGINAL VERSION = TWO RELAYS
LATER VERSION = ONE RELAY
Do not mistake T1 for a relay.
(Later version has speaker output terminals in footprint of former relay)
There was also a version wit h two relay s that had the output terminals on
the indicted relay by passed wit h buss wir e, rendering it inoperative.
ORIGINAL RELAY part# NLA
R43,43b ORIGINAL VERSION = 13K Ω 1/2
W
R43,43b LATER VERSION = 33K Ω 1/2W
13K Ω 1/2W part# NLA
Overture 3
19
Page 20
Amplifier PCB Solder Side
Overture 3
20
Page 21
Bass Amplifier PCB Component Side Silkscreen
Overture 3
21
Page 22
Electrical Parts List (120V)
Part# Description Ref Designation Qty
Capacitors
CP1126 Cap Poly Film 1uF 10% 50V C19 1
CP1630 Cap Alum EL 220uF 20% 25v C20 1
CP1656 Cap Alum EL 100uF 20% NPE C2 1
CP1657 Cap Alum EL 220uF 20% NPE C3 1
CP1658 Cap Disc 100pF 10% 500V C4,12,14,30 4
CP1659 Cap NPE 10uF 20% 25V T/R C11 1
CP1660 Cap Alum EL 1000uF 20% 200V C15,35 2
CP1661 Cap Alum EL 100uF 20% 5 C16 1
CP1662 Cap Alum EL 10uF 20% 35 C17,18,22,23,25 5
CP1663 Cap Alum EL 47uF 20% 25 C21 1
CP1664 Cap Alum EL 4.70uF 20% C24,29 2
CP1665 Cap Alum EL 10uF 20% 63 C28 1
CP1666 Cap Cer Disc 68pF 20% 500 C31,32 2
CP1667 Cap Poly Film 0.47uF 10% C33 1
CP1668 Cap Alum EL 47uF 20% 10 C36 1
CP1669 Cap Poly Film .10uF 10% 4 C40 1
CP1672 Cap Poly Film 0.22uF 5% 63V T/ C5,6,7,13 4
CP1673 Cap Poly Film 1nF 10% 50V C26 1
CP1674 Cap Alum EL 1uF 20% 50V C27 1
CP1675 Cap Poly Film 0.1uF 5% 50V C37,38,39,42 4
CP1676 Cap Poly Film .022uF 5% C41 1
Semiconductors
DI1004 Diode Zener 6.2V 1/2W T/R ZD2 1
DI1060 Diode Switching 500mW 75V D1,2,4,5,6,7,9,11 8
DI1089 Diode 1N4003 1A 200 PIV D10 1
DI1101 Diode Zener 10V 1/2W T/R ZD3,4,5,6 4
DI1186 Diode Zener 36V 5% 5W T/R ZD1 1
DI1187 Diode Bridge Powr 400V/8A D18 1
IC1215 IC TL064CN Quad OPAMP U1,2 2
IC1216 IC TL062CP Dual OP Amp. U3 1
IC1045 Three-Term. Adj. Pos. V R LM317T U4 1
604-L469EGW LED Green/Red Common Cath 1
TR1002 Transistor NPN TO-92 2N3904 Q1,5,7 3
TR1017 Transistor PNP T/R 2N3906 Q2,3,6,8 4
TR1257 MOSFET Power IRFS250 Q13,14,15,16 4
TR1259 Transistor NPN BF469 Q4,9,12 3
TR1260 Transistor PNP BF470 Q10 1
TR1304 Transistor NPN 60V/3A25W 2SD2012 Q11 1
Resistors
RS1036 RES M/F 36 ohm 5% 1/4W R74 1
RS1058 RES M/F 51.1Kohm 1% 1/4W R63 1
RS1063 RES M/F 1 Mohm 1% 1/4W R39 1
RS1150 RES M/F 43.2Kohm 1% 1/4W R56 1
RS1153 RES M/F 47.5Kohm 1% 1/4W R29 1
RS1268 RES M/F 2.21Kohm 1% 1/4W R80 1
RS1342 RES M/F 9.09Kohm 1% 1/4W R52 1
Overture 3
22
Page 23
RS1351 RES M/F 13Kohm 1% 1/4W R9,10,20,48 4
RS1353 RES M/F 3.01Kohm 1% 1/4W R50,51,57 3
RS1355 RES M/F 4.75Kohm 1% 1/4W R6 1
RS1357 RES M/F 100 ohm 1% 1/4W R54 1
RS1370 RES M/F 3.57Kohm 1% 1/4W R24 1
RS1455 RES M/F 150Kohm 1% 1/4W R35,36,49 3
RS1492 RES M/F 221Kohm 1% 1/4W R30 1
RS1505 RES M/F 475Kohm 1% 1/4W R37 1
RS1562 RES M/F 82.5Kohm 1% 1/4W R47 1
RS1585 RES M/F 475 ohm 1% 1/4W R5 1
RS2018 RES M/F 10Kohm 1% 1/4W R13,18,26 3
RS2019 RES M/F 20Kohm 1% 1/4W R2,41,58,69,70,71 6
RS2025 RES M/F 9.31Kohm 1% 1/4W R1 1
RS2099 RES M/F 6.98Kohm 1% 1/4W R21,22 2
RS2126 RES M/F 69.8Kohm 1% 1/4W R7 1
RS2128 RES M/F 6.65Kohm 1% 1/4W R8 1
RS2130 RES M/F 432 ohm 1% 1/4W R11 1
RS2131 RES M/F 536Kohm 1% 1/4W R15 1
RS2133 RES M/F 69.8Kohm 1% 1/4W R17 1
RS2136 RES M/F 53.6Kohm 1% 1/4W R19 1
RS2139 RES M/F 200 ohm 1% 1/4W R25 1
RS2140 RES M/F 619Kohm 1% 1/4W R32 1
RS2141 RES M/F 110Kohm 1% 1/4W R33 1
RS2142 RES M/F 100Kohm 1% 1/4W R34,38,53 3
RS2143 RES M/F 3.32Kohm 1% 1/4W R27,40,46,55 4
RS2144 RES M/F 1.3Kohm 1% 1/4W R42,60 2
RS2146 RES M/F 1.5Mohm 1% 1/4W R44 1
RS2147 RES M/F 249Kohm 1% 1/4W R45 1
RS2148 RES M/F 130Kohm 1% 1/4W R59 1
RS2149 RES Fuse 1Kohm 5% 1/4W T R61,62,64,66,72,73,76,78 8
RS2150 RES Fuse 0.22ohm 5% 1/2W R65,67,77,79 4
RS2151 RES M/O F/P 1Kohm 5% 2W R68 1
RS2152 RES M/F 75Kohm 1% 1/4W R81 1
RS2153 or 146-6461 Potentiometer 20Kohm 20% BASS GAIN 1
RS2154 Potentiometer 2Kohm BIAS ADJ P2 1
RS2155 RES C/F 33Kohm 5% 1/2W R43,43B 2
RS2158 RES M/F 3.3Kohm 5% 1/4W R75 1
RS2181 RES M/F 2.21Mohm 1% 1/4W R28,31 2
RS2283 RES M/O F/P 5.1Kohm 5% 5W R23 1
Miscellaneous
SC1082 SC 6-32x 3/4 Mach-Thr, Pa 2
SC1099 SC 6-32x 1/4 Mach-Thr Pan 6
SC1240 SC 6-32x 1/2 Mach-Thr Pan 4
SC1277 SC 5-20x1/2 Hi-Lo Pan Phi 2
SP1086 Clamp Insulator 2
ST1022 Standoff #6 x 5/16 Nylon 2
TH1017 Inrush Current Lititer CL1 1
VA1009 Varistor 200V MOV1 1
Electrical Parts List (120V)
Part# Description Ref Designation Qty
Overture 3
23
Page 24
XX1278 Cntrl Pnl Plstc 1
XX1279 or 331944-001 KNOB FOR GAIN POTENTIOMETER 1
XX1280 Power Cord 12Ft 16AWG 1
XX1284 Strain Relief Black 1
XX1302 Logo-Led Plate 1
BR1415 Plate Top 1
FH1004 Fuseholder 2AG Chassis Mo 1
FS1068 or 331925-001 LINE FUSE 5A 2AG SLO-BLO (120V) F1 1
HS1145 Heatsink 1
MI1155 Transformer, Coupling T1 1
NU1050 Nut 6-32x 1/4 Hexagonal K 2
RE1019 Relay,12A,48VDC K2 1
Electrical Parts List (120V)
Part# Description Ref Designation Qty
Overture 3
24
Page 25
Electrical Parts List (230V)
Part# Description Qty
SEMICONDUCTORS
DI1186 Diode Zener 36V 5% 5W T/R 1
DI1224 DIODE PWR RECT 800V/3A 1
IC1045 Three-Term. Adj. Pos. V R LM317T 1
IC1215 IC TL064CN Quad OP AMP 2
IC1216 IC TL062CP Dual OP Amp 1
TR1304 Transistor NPN 60V/3A 25W 2SD2012 1
TR1002 Transistor NPN TO-92 2N3904 3
TR1017 Transistor PNP T/R 2N3906 4
TR1316 Xsistor ZTX658 NPN 3
TR1317 Xsistor ZTX758 PNP 1
TR1318 Pwr Mosfet STH16NA40FI 2
DI1060 Diode Switching 500mW 75V 8
DI1003 Diode Rectifier 1N4004 2
DI1004 DIODE ZENER 6.2V 1/2W T/R 1
604-L469EGW Led Green/Red Common Cathode 1
RESISTORS
RS1058 RES M/F 51.1Kohm 1% 1/4W 1
RS1063 RES M/F 1 Mohm 1% 1/4W 1
RS1150 RES M/F 43.2Kohm 1% 1/4W 1
RS1153 RES M/F 47.5Kohm 1% 1/4W 1
RS1342 RES M/F 9.09Kohm 1% 1/4W 2
RS1351 RES M/F 13Kohm 1% 1/4W 2
RS1353 RES M/F 3.01Kohm 1% 1/4W 2
RS1357 RES M/F 100 ohm 1% 1/4W 1
RS1366 RES M/F 2.00Kohm 1% 1/4W 1
RS1455 RES M/F 150Kohm 1% 1/4W 2
RS1479 RES M/F 2.43Kohm 1% 1/4W 1
RS1492 RES M/F 221Kohm 1% 1/4W 1
RS1505 RES M/F 475Kohm 1% 1/4W 1
RS2018 RES M/F 10Kohm 1% 1/4W 5
RS2019 RES M/F 20Kohm 1% 1/4W 2
RS2025 RES M/F 9.31Kohm 1% 1/4W 1
RS2099 RES M/F 6.98Kohm 1% 1/4W 2
RS2128 RES M/F 6.65Kohm 1% 1/4W 1
RS2131 RES M/F 536Kohm 1% 1/4W 1
RS2139 RES M/F 200 ohm 1% 1/4W 1
RS2141 RES M/F 110Kohm 1% 1/4W 1
RS2142 RES M/F 100Kohm 1% 1/4W 3
RS2143 RES M/F 3.32Kohm 1% 1/4W 2
RS2144 RES M/F 1.3Kohm 1% 1/4W 2
RS2146 RES M/F 1.5Mohm 1% 1/4W 1
RS2149 Res. Fuse 1Kohm 5% 1/4W T 2
RS2152 RES M/F 75Kohm 1% 1/4W 1
RS2181 RES M/F 2.21Mohm 1% 1/4W 2
RS2295 RES M/F 511 ohm 1% 1/4W 1
RS2297 RES M/F 3.3Mohm 1% 1/4W 1
RS2147 RES M/F 249Kohm 1% 1/4W 1
RS2298 RES M/F 301Kohm 1% 1/4W 1
RS2299 RES M/F 1.4Kohm 1% 1/4W 1
Overture 3
25
Page 26
RS2300 RES M/F 374Kohm 1% 1/4W 1
RS2302 RES M/F 4.42Kohm 1% 1/4W 1
RS2303 RES M/F 39.2Kohm 1% 1/4W 3
RS2304 Res Fuse 2Kohm 5% 1/3W T/ 2
RS2305 Res Fuse 75 ohm 5% 1/3W T 1
RS2306 Res Fuse 6.8Kohm 5% 1/3W 3
RS2307 RES M/F 182Kohm 1% 1/4W 1
RS2396 RES M/F 1.58Kohm 1% 1/4W 1
RS1154 RES M/F 31.6Kohm 1% 1/4W 1
RS2133 RES M/F 69.8Kohm 1% 1/4W 2
RS2151 RES M/O F/P 1Kohm 5% 2W 1
RS2296 RES M/O F/P 62Kohm 5% 2W 2
RS2301 Res Fuse 0.47 ohm 5% T/R 2
RS2464 RES W/W 20Kohm 5% 6W T/R 1
RS2153 or 146-6461 Potentiometer 20Kohm 20% BASS GAIN 1
RS2369 POTENTIOMETER 1Kohm BIAS ADJ 1
CAPACITORS
CP1126 CAP POLY FILM 1uF 10% 50V 1
CP1656 Cap. Al El 100uF 20% NPE 1
CP1659 Cap. NPE 10uF 20% 25V T/R 1
CP1661 Cap. Alum El. 100uF 20% 5 1
CP1662 Cap. Alum El. 10uF 20% 35 5
CP1663 Cap. Alum El. 47uF 20% 25 1
CP1664 Cap. Alum EL. 4.70uF 20% 1
CP1666 Cap Cer Disc 68pF 20% 500 2
CP1669 Cap. Poly Fil 10uF 10% 4 1
CP1672 Cap Poly 0.22uF 5% 63V T/ 4
CP1673 Cap. Pol Fil 1nF 10% 50V 1
CP1674 Cap. Alum El. 1uF 20% 50V 1
CP1675 Cap. Pol Fil 1uF 5% 50V 4
CP1676 Cap. Pol Fil .022 uF 5% 1
CP1804 Cap Alum El 270uF 400V 1
CP1805 Cap Alum El 22uF 20% 100V 1
CP1806 Cap Poly Fil 0.22uF 10% 4 1
CP1807 Cap Al El 22uF 20% 250V 1
CP1828 Cap Alum El 390uF 20% 200 1
CP1829 Cap Al El 4.7uF 20% 100V 1
CP1904 CAP POLY 0.022uF 20% 250V 1
CP1658 Cap. Disc 100pF 10% 500V 3
CP1897 CAP Alum El 2200uF 20% 25V 1
MISCELLANEOUS
RE1023 Relay PC Mount 1
MI1175 Transformer Coupling Mode 1
TE1175 TERMINAL MALE TAB 0.250 3
TE1187 TERM MALE TAB 0.187 3
TH1017 Inrush Current Limiter 1
VA1010 Varistor 400V 1
SC1057 SC 4-40x5/16 MACH-THR PAN 1
SC1082 SC 6-32x 3/4 Mach-Thr, Pa 2
Electrical Parts List (230V)
Part# Description Qty
Overture 3
26
Page 27
SP1092 NYLON STANDOFF 2
ST1022 Standoff #6 x 5/16 Nylon 2
WA1085 WASHER #6 INTERNAL STAR 2
XX1278 Cntrl Pnl Plstc 97 1
XX1279 or 331944-001 Knob for Gain Potentiometer 1
XX1284 Strain Relief Black 1
XX1302 Logo-Led Plate 1
XX1340 HOLE PLUG 1
TE1214 TERMINAL FEMALE FASTON 1
WA1091 WASHER SPLIT #6 ZINK FSH 1
SC1000 SC 6-32x5/16 MACH-THR PAN 6
SC1277 Sc 5-20x1/2 Hi-Lo Pan Phi 2
SC1219 Hex.Screw 6-32x3/8,Zinc S 4
BR1413 PCB Mntg Plate 2
BR1414 Plate Bottom 97 1
BR1415 Plate Top 97-2/3 1
BR1517 Transistor Clamp 1
NU1050 Nut 6-32x 1/4 Hexagonal K 2
604-L469EGW Led Green/Red Cath 1
TE1050 Terminal Ultra Fast Ins. 1
TE1125 Terminal Ultra Fast Ins. 1
FS1077 Line Fuse 1.6A 2AG SLO-BLO (230V) 1
TE1199 FEMALE POWER CORD RECEPTACLE 1
Electrical Parts List (230V)
Part# Description Qty
Overture 3
27
Page 28
Integrated Circuit Diagrams
Overture 3
28
Page 29
Wiring Diagram/Crossover Network Schematic (120V)
CROSSOVER NETWORK
SCHEMATIC ( 12 0 V)
MIDRANGE
TRANSDUCER (2)
330650-001
WOOFER (4)
330618-001
+-
BLU BLU/BLK
TWEETER
333232-001
AMPLIFIER
WIRING DI AG RAM ( 1 2 0V )
PCB
.205-IN
.250
PCB
+IN
C5 *
5.6 uF
100V
R2
1.5 ohms
5W
C2
10 uF
100V
L1
0.61 mH
C1A
68 uF
50V
L2
10 mH
L3
3.7 mH
L4
0.1 mH
R1
8.0 ohms
5W
C3
300 uF
50V
C4
16 uF
100V
.205 -HF
.250
.205
.205
+HF
-MF
-MF
.250
.250
+MF
+MF
NETWORK
334416-001
GRN
GRN
GRN/BLK
GRN/BLK
+
-
+
-
+
BLU
BLU/BLK
-
AMPLIFIER
+LF
.250
YEL
+LF
.250
00439
C1B
30 uF
50V
R3
10 ohms
2W
.205
.205
BRN
-LF
-LF
.250
.250
BRN
+LF
+LF
.205
.205
YEL/BLK
-LF
-LF
+YEL
-YEL/BLK
+ YEL
YEL
GRN
+
GRN/BLK
GRN/BLK
GRN
+
-
-
YEL/BLK
+
+
-
-
BRN
BRN
-
-
+
+
- YEL/BLK
* Early rev. part had 50V rating, see service bulletin Page 17
Overture 3
29
Page 30
Wiring Diagram/Crossover Network Schematic (230V)
PCB
.205-IN
.250
PCB
+IN
R2
1.5 ohms
5W
C2
10 uF
100V
L1
0.61 mH
C1A
200 uF
50V
L2
10 mH
L3
3.7 mH
L4
0.1 mH
R1
8.0 ohms
5W
C3
300 uF
50V
C4A
30 uF
100V
-HF
+HF
-MF
-MF
+MF
+MF
NETWORK
5
4
6
3
1
AMPLIFIER
+YEL
+LF
.250
YEL
+LF
.250
00440
.205
.205
BRN
-LF
-LF
.250
.250
BRN
+LF
+LF
.205
.205
YEL/BLK
-LF
-LF
C1B
200 uF
50V
C4B
30 uF
100V
C5A
12 uF
50V
C5B
12 uF
50V
+ YEL
YEL
+
+
-
-
YEL/BLK
+
+
-
-
BRN
BRN
-
-
+
+
- YEL/BLK
-YEL/BLK
2
6 PIN
HEADER
MIDRANGE
TRANSDUCER (2)
330650-001
WOOFER (4 )
330618-001
+-
BLU BLU/BLK
AMPLIFIER
CROSSOVER NETWORK
SCHEMATIC (230V)
Overture 3
30
Page 31
120V POWER SUPPLY
Overture 3
31
Page 32
120V FILTER/CONNECTORS
Overture 3
32
Page 33
120V AMPLIFIER
Overture 3
33
Page 34
230V POWER SUPPLY
Overture 3
34
Page 35
230V FILTER/CONNECTORS
Overture 3
35
Page 36
230V AMPLIFIER
Overture 3
36
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