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ENTRA ENTRA POINT FIVE HTS
POWERED SUBWOOFER
SERVICE MANUAL
Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev 2 12/2002
TABLE OF CONTENTS SPECIFICATIONS . . . . . . . . . .. . . . . . . . . . . . ... . . . . . . . . . .3 DETAILED SPECIFICATIONS . . . ... . . . . . . ............. . . . . .4 CONTROLS and CONNECTIONS . . . .. . . . . . . . . .. . . . . . . .5 OPERATION . . . . . . . . . . . .. . . . . . . . . . . . . . . ...... .. . . . . . .7 MECHANICAL/PACKAGING PARTS LIST . .. . . . . . . . . . . . .8 EXPLODED VIEW . . . .. . . . . . . . . . . . . . . . ............. . . . . . .9 PACKAGING . . . . . . . .. . . . . . . . . . . . . . . ................ . . . . .10 TEST SETUP AND PROCEDURES . . . .. . . . . . . . . . . . . . . .11 ELECTRICAL PARTS LIST . . . . . . . .. . . . . . . . . . . . . . . . . . .12 INTEGRATED CIRCUIT DIAGRAMS . . . . . . . . ......... . ..... .17 BLOCK DIAGRAM . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .19 PCB DRAWINGS. . . .. . . . . . . . . . . . . . . ................. . . . ....20 SCHEMATICS . . . . . . . . . . . . . . . . . . . ......... . . . . . . . . . . . .23
2
Entra Subwoofer Specifications
Frequency Response: Maximum Amplifier Power 34Hz- 150Hz (±3dB) 150 watts*, RMS, 500 watts peak, (20Hz - 150Hz with no more than 0.1% THD) 50Hz - 150Hz, 24dB/octave, continuously variable 10" (245mm) C.M.M.D. shielded DCR = 3.3 ohms ±10% 15" x 14-1/2" x 17" (381mm x 368mm x 432mm) 47 lb (21.4kg) Each
Crossover Frequencies: Driver: Dimensions (H x W x D): Weight:
Infinity continually strives to update and improve existing products, as well as create new ones. The specifications and construction details in this and related Infinity publications are therefore subject to change without notice.
3
Entra Subwoofer Detailed Specifications
4
Entra Subwoofer Controls and Connections
5
Entra Subwoofer Controls and Connections (Cont.)
6
Entra Subwoofer Operation
7
Entra Subwoofer Mechanical/Packaging Parts List
MECHANICAL PARTS LIST 1 2 3 4 5 6 7 8 PACKAGING 9 10 11 12 13 OWNERS MANUAL WARRANTY CARD SURVEY CARD PAD, TOP, END (2) CARTON 336422-002 335841-001 335868-002 336457-001 336458-001 SCREW, (16), #8 x .75, BLK, PB TRPH AMPLIFIER WOOFER, 10" (254mm)C.M.M.D. SHIELDED DCR = 3.3 ohms ±10% GRILLE CUP (6) SCREW, (6), #6 x .75, BLK, PB PPH GRILLE FRONT BAFFLE FOOT (4) PORT TUBE 336806-001 NOT FOR SALE 336649-001 333249-001 903401-012 336454-001 336452-001 330163-001 336806-001
8
Entra Subwoofer Exploded View
1 AMPLIFIER (NOT FOR SALE) PRE AMP PCB ASSEMBLY MAIN AMP ASSEMBLY
POWER SUPPLY PCB ASSEMBLY INFINITY ENTRA SUBWOOFER CABINET (NOT FOR SALE)
2 1 3 4
8 7 1
SPEAKER LEVEL INPUT OUTPUT
R
+ L _
+ L _
LINE LEVEL INPUT
LEVEL
PHASE
CROSSOVER FREQUENCY
80
_ R +
_ R + MIN MAX
0°
60
120
DIRECT
180°
50
150
REMOVE THESE SCREWS
6
DIRECT INPUT BYPASSES FILTER
5
WARNI G: REDUCETHERI KOF I EOREL RI SHOCK, N TO S F R ECT C DO NOT EXPOSETHI APPL NCET RAI ORMOI T S I A O N S URE.
R
POWER
AT TENT N: O I POURÉVI ERT T OUT RI QUEDEFEUOUCHOC S ÉL ECTRI UE, PASEXPOSERCET APPAREI ÀL PL EOUÀ Q NE L A UI L UMI I É. 'H DT
OFF
ON
SERIAL NO.
120V ~ 60Hz 3A
INFINITY SYSTEMS INC. NORTHRIDGE, CA, USA AMPLIFIER MADE IN CHINA
WARNI G: N SHOCKHAZ ARD-DONOT OPEN NOUSERSERVI EABL PART I SI E C E SN D AVI RI QUEDECHOCÉL RI UES: S ECT Q NEPASOUVRI R
TO SERVICE THE ENTRA SUBWOOFER 1) Remove the grille. 2) Extract (6) rubber grille retainers as shown in the illustration above; this can be accomplished by carefully pulling them out of the cavities with long-nosed pliers or similar tool. 3) Remove the (6) Phllips screws that are now exposed. 4) Remove the front baffle. 5) Remove the (6) screws that secure the driver. 6) To service the amplifier, remove the (10) Phillips screws at the rear of the enclosure, and pull the amplifier out of the back. Remove the two Phillips screws as indicated in VIEW A to remove the rear cover.
VIEW A
9
00470
Entra Subwoofer Packaging
9
10 11
12
12
13
10
00472
Entra Subwoofer Test Setup and Procedure
SIGNAL GENERATOR AC VOLT METER (10V) ENTRA SUB UNDER TEST
SPEAKER LEVEL INPUT OUTPUT
R
+ L _
+ L _
LINE LEVEL INPUT
LEVEL
PHASE
CROSSOVER FREQUENCY
80
_ R +
_ 0° R + 180° 50 150 60 120
DIRECT
M IN
M AX
DIRECT INPUT BYPASSES FILTER
AMPLIFIER OUTPUT FROM GENERATOR/AMPLIFIER
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
R
POWER
ATTENTION: POUR ÉVITER TOUT RISQUE DE FEU OU CHOC ÉLECTRIQUE, NE PAS EXPOSER CET APPAREIL À LA PLUIE OU À L' UMIDITÉ. H
OFF
ON
SERIAL NO.
120V ~ 60Hz 3A
WARNING: SHOCK HAZARD-DO NOT OPEN
INFINITY SYSTEMS INC. NORTHRIDGE,CA,USA AMPLIFIER MADE IN CHINA
NO USER SERVICEABLE PARTS INSIDE AVIS: RISQUE DE CHOC ÉLECTRIQUENE PAS OUVRIR
SYSTEM AURAL SWEEP TEST Equipment needed: · Function/signal generator/sweep generator · Integrated Amplifier · Multimeter · Speaker cables General Unit Function (UUT = Unit Under Test) Switches/knobs on the amplifier faceplate: Crossover Frequency adjust full CW (150Hz) Phase switch either position 1. From the signal generator, Connect single line level input (RCA) cable to "Line Level Input" jack on UUT. 2. Turn the LEVEL control full counterclockwise (Min). 3. Turn on generator, adjust to 400mV, 30 Hz. 4. Plug in UUT; turn the power switch ON. Turn LEVEL control full clockwise (Max) 5. LED should now be Green; immediate bass response should be heard and felt from rear port tube opening. 6. Turn off generator, turn LEVEL control fully counterclockwise (Min), disconnect RCA cable. 7. Connect two pairs of speaker cables to Speaker Level input terminal on UUT. Cables should be connected to an integrated amplifier fed by the signal generator. Observe polarity. 8. Turn on generator and adjust so that speaker level input at the amplifier is 6.0V, 30 Hz. Turn LEVEL control full clockwise (Max) 9. Green LED should light, immediate bass response should be heard and felt from the port tube opening. Sweep Function 1. Follow steps 7-10 above, using a sweep generator as a signal source. 2. Sweep generator from 20Hz to 20kHz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or any other noises. If any unusual noises are heard, remove woofer and test. Driver Function (Woofer) 1. Remove woofer from cabinet; detach + and - wire clips. See page 9 for removal instructions. 2. Check DC resistance of woofer; it should be 3.3 ohms±10%. 3. Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier fed by a signal generator. Turn on generator and adjust so that speaker level output is 5.0V. 4. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises.
11
00473
Entra Subwoofer Electrical Parts List
Part No. PRE AMP PCB ASSEMBLY
Resistors 020-100498-120 020-100598-120 020-100698-120 020-110598-120 020-150598-120 020-180698-120 020-220698-120 020-330498-120 020-750498-120 021-100401-120 021-100598-100 021-154598-100 021-169598-100 021-200698-100 021-215598-100 021-280498-100 021-442598-100 021-511498-100 CARBON FILM RESISTOR 1K 1/8W J CARBON FILM RESISTOR 10K 1/8W J CARBON FILM RESISTOR 100K 1/8W J CARBON FILM RESISTOR 11K 1/8W J CARBON FILM RESISTOR 15K 1/8W J CARBON FILM RESISTOR 180K 1/8W J CARBON FILM RESISTOR 220K 1/8W J CARBON FILM RESISTOR 3K3 1/8W J CARBON FILM RESISTOR 7K5 1/8W J M.O.F. RESISTOR 1K 1W J MO-100 METAL FILM RESISTOR 10K 1/8W F METAL FILM RESISTOR 15K4 1/8W F (MF) METAL FILM RESISTOR 16K9 1/8W F (MF) METAL FILM RESISTOR 200K 1/8W F METAL FILM RESISTOR 21K5 1/8W F (MF) METAL FILM RESISTOR 2K8 1/8W F METAL FILM RESISTOR 44K2 1/8W F METAL FILM RESISTOR 5K11 1/8W F Capacitors 030-100247-300 030-220223-300 032-100243-301 032-220353-300 032-470353-303 034-100525-300 034-100614-300 034-100715-200 034-220515-300 CERAMIC CAPACITOR 0u1/50V Z P:5 CERAMIC CAPACITOR 220P/50V K P:5 PE CAPACITOR 0u1/63V J P:5m/m PE CAPACITOR 0u22/63V J P:5m/m PE CAPACITOR 0u47/63V J P:5m/m ELEC. CAPACITOR 10uF/25V M (R) P:5 ELEC. CAPACITOR 100uF/16V M (R)2.5 ELEC. CAPACITOR PC 1000uF/16V M (R)P:5 ELEC. CAPACITOR PC 22uF/16V M (R) P:5 Semiconductors 050-414802-100 050-505200-000 051-101501-000 051-181502-000 053-007200-000 053-007400-000 053-455801-000 DIODE 1N4148 LED P/N:UDC-5052W LED TRANSISTOR PNP 2SA1015GR TO-92 TRANSISTOR NPN 2SC1815GR TO-92 IC TL072 CP DIP DUAL OP-AMP IC TL074CN QUAD OP-AMP I.C PC BA4558 (ROHM) DUAL OP-AMP D101,102,103, 104,109 D110 Q102,103 Q101 IC102 IC101 IC103 5 1 2 1 1 1 1 C110,109,121,122, 118,119 C105,106,107 C114 C104,108 C113,125,123 C102,103,120 C127,128 C124 C111 6 3 1 2 3 3 2 1 1 R107,123,138 R136,127,121, 135,124,125 R133 R122 R118 R128 R126,129 R132,134 R110,112 R101,102 R109 R137 R120 R103,104,105,106 R111 R130 R131 R116,117 3 6 1 1 1 1 2 2 2 2 1 1 1 4 1 1 1 2
Description
Designator
Quantity
12
Entra Subwoofer Electrical Parts List
Part No.
Miscellaneous 072-010058-000 074-030002-000 083-031605-000 083-052618-000 026-200595-263 026-200595-264 RCA JACK 2P P/N:052000W1G(Red,White) TOGGLE SW P/N L101 CONNECTOR LEAD WIRE #26 L:60mm #18 L:70mm CONNECTOR LEAD WIRE EH2.5-7P+SCN2.5P+7 LEAD WIRE VR P/N:R1210G-2A1-B20Kx2 10% VR P/N:R1210N-2A1-B20K 10% JK101 SW101 CN1 CN101 VR101 VR102 1 1 1 1 1 1
Description
Designator
Quantity
MAIN AMP ASSEMBLY
Resistors 020-100398-120 020-100498-120 020-100598-120 020-100698-120 020-150498-120 020-150598-120 020-220498-120 020-220598-120 020-220698-120 020-270398-120 020-270698-120 020-330297-120 020-390598-120 020-470498-120 021-470597-120 020-470598-120 020-560398-120 021-100003-020 021-100201-121 021-100397-120 021-100401-120 021-100496-120 021-330498-120 021-499698-100 021-680296-120 CARBON RESISTOR 100R 1/8W J CARBON RESISTOR 1K 1/8W J CARBON RESISTOR 10K 1/8W J CARBON RESISTOR 100K 1/8W J CARBON RESISTOR 1K5 1/8W J CARBON RESISTOR 15K 1/8W J CARBON RESISTOR 2K2 1/8W J CARBON RESISTOR 22K 1/8W J CARBON RESISTOR 220K 1/8W J CARBON RESISTOR 270R 1/8W J CARBON RESISTOR 270K 1/8W J CARBON RESISTOR 33R 1/4W J CARBON RESISTOR 6 39K 1/8W J CARBON RESISTOR 4K7 1/8W J M.O.F. RESISTOR 47K 1/4W J CARBON RESISTOR 47K 1/8W J CARBON RESISTOR 560R 1/8W J M. O. F. RESISTOR 0R1 3WS J M. O. F. RESISTOR 10R 1W J MO M. O. F. RESISTOR 100R 1/4W J M. O. F. RESISTOR 1K 1W J M. O. F. RESISTOR 1K 1/2W M. O. F. RESISTOR 3K3 1/8W J METAL FILM RESISTOR 499K 1/8W F M. O. F. RESISTOR 68R 1/2W J Capacitors 030-100264-300 030-220223-300 030-220244-261 030-470344-200 CERAMIC CERAMIC CERAMIC CERAMIC CAPACITOR CAPACITOR CAPACITOR CAPACITOR 0u1/100V K NPO 220P/50V K P:5 22pF/50V J NPO PC 470pF/50V 10 C718,707,708,719 C703,702,717,716 C712,713 C715,714,711,710 4 4 2 4 R511,714,719 R506,721,507,702 R503,610,504,510, 512,601,606 R712,725,731 R713,718,721 R607,709,711 R710,742 R502,508,701,703 R603 R715,717 R611 R723,724 R716 R602 R728 R505,604,605 R743 R734,735 R608,609 R726,730 R739 R727,729 R720 R513,509 R732,733 3 4 7 3 3 3 2 4 1 2 1 2 1 1 1 3 1 2 2 2 1 2 1 2 2
13
Entra Subwoofer Electrical Parts List (Cont.)
Part No.
032-100393-300 034-100515-301 034-100615-301 034-100695-300 034-470415-300 034-470515-000 035-220143-100 035-220243-100
Description
PE CAPACITOR 0u1/63V J P:5 ELEC. CAPACITOR PC 10uF/16V M (R)0511 ELEC. CAPACITOR 100uF/16V M (R)0611 ELEC. CAPACITOR 100uF/63V M (R)1012 ELEC. CAPACITOR 4u7/50V M (R)0511 P: ELEC. CAPACITOR 47uF/16V M (R)0511 PE CAPACITOR FE-M 0u0022/63V J P:5m/m PE CAPACITOR FE-M 0u022/63V J P:5m/m Semiconductors
Designator
C606,607,601,709 C701,723 C605 C720,721 C501,603 C502,604,704 C608 C503
Quantity
4 2 1 2 2 3 1 1
050-003000-100 050-400201-100 050-414802-100 053-123700-100 053-455801-000 051-003100-000 051-003200-000 051-046900-000 051-047000-000 051-066900-000 051-138600-000 051-181500-000 051-351900-000 051-540100-000 051-555100-000
ZENER DIODE 30V HZ-30-2 05000881 DIODE 1N4002 100V/1A TAPING DIODE 1N4148 IC PC UPC 1237HA LIMITER I.C PC BA4558 (ROHM) OP-AMP TRANSISTOR TIP 31C TO-220 TRANSISTOR TIP 32C TO-220 TRANSISTOR 4 BF469 TRANSISTOR BF470 TRANSISTOR 1 2SD669A (C class) TRANSISTOR 2SA 1386(SANKEN) TO-3P TRANSISTOR PC 2SC1815GR TRANSISTOR 2SC 3519(SANKEN) TO-3P TRANSISTOR 2N5401 TRANSISTOR 2N5551 TO-92 Miscellaneous
D807 D710,711,601, 717, 712, 806 D501,713,715,716, 714,708,709 IC601 IC501,701 Q707 Q708 Q704 Q703 Q711 Q710 Q501,502,602,603 Q709 Q702,706,601 Q701,705
1 6 7 1 2 1 1 1 1 1 1 4 1 3 2
061-700011-101 072-040007-000 072-040039-000 072-040041-000 072-040206-000 073-014005-600 073-014006-600 074-300004-000 083-022547-000 025-050001-000
SLICON RUBBER PCS P/N:1877 110x30mm t=0.19mm 7P WAFER SWA101 BC501 JS-1001-07 TERMINAL (PCB) PC205 (t=0.8m/m)T205MA TERMINAL(PCB) T250MA (P/N 0635R-BL2) CONNECTOR P/N:3PIN JS-1001-4 P:2.5 BRACKET(LEFT SIDE) PCS 72x19m/m t=1mm BRACKET(RIGHT SIDE) PCS 72x19m/m t=1mm RELAY 48VDC P/N PCE-148D1H CONNECTOR WIRE #18 VH3.96+SCN2.5 VARISTOR TSA-104
J602 J601 CON802 RLY601 CN302 TH601
1 1 1 1 1 1 1 1 1 1
14
Entra Subwoofer Electrical Parts List (Cont.)
Part No. POWER SUPPLY PCB ASS'Y
Resistors 020-820497-120 021-470301-120 CARBON RESISTOR 8K2 1/4W J MO RESISTOR 470R 1W J MB TYPE MO-100 Capacitors 030-100264-300 030-100295-201 034-220515-300 034-220615-301 034-470763-301 CERAMIC CAPACITOR 0u1/100V K NPO TAPING UL SAFETY CAPACITOR YS-SC103Z2 10000pF/400V ELEC. CAPACITOR PC,308 22uF/16V M (R)0511 ELEC.CAPACITOR 220uF/16V M (R)0611 P:5 ELEC.CAPACITOR 4700uF/63V M (R) 25*40 Semiconductors 050-001500-000 051-118900-100 051-677000-000 DIODE 15V 1/2W HZ15-3 TRANSISTOR 2SD882P(TO-220) TRANSISTOR 2SB772 (TO-220) Miscellaneous 052-602000-000 072-040032-000 073-032027-000 083-021805-000 083-022548-000 083-031603-000 091-000130-000 093-105203-300 RECTIFY DIODE KBU8D(SUB-100W) 8A/200V WAFER 2 P:3.96 3P MALE VH HEAT SINK PCS 40x24x2.0m/m LEAD WIRE #22 GND WIRE L:80mm 5TT+5TT LEAD WIRE #18 UL1015 PCS T187(t0.8)+ B1811T0P-2 4Px120mm CONNECTOR 1 LEAD WIRE #22 +5TT FUSE HOLDER PCS P/N:CQ-203SP FUSE:UL GSL(2AG) FUSE:3A,250V,5*20mm BD2 CN30 1 1 1 1 2 1 2 1 ZD301,302 Q301 Q302 2 1 1 C2,3 C309 C307 C305,306 C303,304 2 1 1 2 2 R301,304 R303,302 2 2
Description
Designator
Quantity
CN30 F301
MISCELLANEOUS
005-009885-000 005-033420-000 008-068701-000 042-010042-000 061-020000-000 061-314002-000 061-800000-000 062-050400-000 062-261313-000 063-062512-000 066-120300-900 070-000030-410 070-040010-210 070-400010-206 070-400010-212 070-400010-812 GASKET 97.5x85x36cm STYROFOAM 335.0x191.0x65.0mm GASKET SM-55 GASKET 860.0x5.0 t=2.0mm TRANSFORMER P/N:PT-1739 KNOB ABS HTS-10/20 p20x15m/m UL94V-0 BLK CORD BUSHING P/N SB4F-2 TRANSISTOR COVER P/N:TW-1 PUSH TERMINAL 4P JK102A,JK102B P/N E405 BUCKET(HI PS 94VO)304.8x177.8x124.2m/m BLK PLATE 304.8x177.8 t=2.5mm (SPCC) CABLE TIE PCCV-120S SCREW TRANSFORMERx4,HEAT SINKx6 M4;4x10m/m BLK SCREW PC TRAN.x5,TH601x1,GROND WIREx1 PMS M3x10m/m BLK SCREW PCB VS BRACKETx4,BRACKET VS HEAT SINKx23x6m/m BLK SCREW 3x12m/m BLK SCREW RCA JACKx1 PTS-4 3x12 BLK 1 40 2 1 2 1 2 2 1 1 3 10 7 6 1 1
15
Entra Subwoofer Electrical Parts List (Cont.)
Part No.
071-060031-400 071-100810-100 071-140031-901 072-050002-000 073-032306-600 074-020015-000 083-041600-004
Description
Designator
Quantity
2 4 1 1 1 1 1
NUT WITH GEAR TRANS FOR MERx2 K-NUT 4p FLAT WASHER PC TRANS FOR MERx4 ID=4.3 OD=9.5 t=0.8m/m GEAR WASHER BACK PANEL VS GROUND WIRE M3 BLK GROUND WASHER GROUND WIRE VS PANEL GND-1 HEAT SINK ALUM. 154x125x34mm ROCKER SW 125V/5A P/N:R19-33A(SPST)PIN LOCK TYPE AC CORD SPT-2 #16 12 FEET+5TT DOUBLE INSULATE
16
Entra Subwoofer Integrated Circuit Diagrams
17
Entra Subwoofer Integrated Circuit Diagrams (Cont.)
µPC1237HA IC601
1
8
µPC1237HA IC601
MUTING
Vcc
7
8
OVERLOAD DETECTION
1
OVERLOAD DETECTION FLIP-FLOP CIRCUIT
Vcc ON MUTE
RELAY DRIVE CIRCUIT
6
NEUTRAL VOLTAGE DETECTION
2
NEUTRAL VOLTAGE DETECTION
AC OFF DETECTION
SWITCH for LATCH AUTOMATIC RESET
5
GND
3
SWITCH for LATCH AUTOMATIC RESET
4
AC OFF DETECTION
18
00330
Entra Subwoofer
Block Diagarm
1
2
3
4
15K4
5
6
7
8
Direct
A
Nor.input SPK IN + R SPK OUT
A
INPUT MAX
+15V PHASE SW
B
L
-
15K
VARI. LPF 2rd order DIR/NOR MIXER FIX LPF 2rd order
VOL CTL
0° + 180 ° HPF 2rd order
B
-
+
+
-15V
C
AC/DC CONVERTER LED DIRVER
C
GEN
RED
D
CLAMPING CIRCUIT SPK. DIRVER CIRCUIT
D
SP.
F
00474
1
2
3
2 6
7
8
19
20
21
22
Entra Subwoofer
1 2 3 4
Preamp Schematic
5 6 7 8 9 10
A
A
JK101
Direct
2
3
R137 15K4
B
Normal +
LCH
1
B
JK102:B
5
JK102:A
1
+
LCH
R101 1K 1W
2 6
C
SPEAKER IN PUT RCH
RCH
3
7
SPEAKER OUT PUT
D103 1N4148
C
R102 1K 1W
4 8
+
+
D104 1N4148 C110 C107 220P 50V R107 1K C102 10u 25V C105 220P 50V C103 10u 25V R112 7K5
2 3 4 1 11
.1u 63V
VARIABLE LPF
VR101:A 20KB
2
VR101:B 20KB
5 3 4 6
C114 .1u 63V R117 5K11
5 6 7
R120 16K9
R127 10K R109 10K R111 21K5
10 9 8
R130 2K8
D
R103 200K R104 200K R105 200K R106 200K D101 1N4148
R116 5K11
1
R118 TL074 15K
IC101:D
13 12
D
C128 100u 16V +15V -15V C127 100u 16V
TL074
14
VOLUME CONTROL
TL074
C121
TL074
IC101:A
IC101:C
3
2
2 1
1
3
1 4
5
C106 220P 50V
R110 7K5
1
E
4
3
C109 .1u 63V
VR102 20KB
SW101 180 PHASE SW
R123 1K
IC102:A
C122 .1u 63V Q101 C1815
R131 44K2
R124 10K
2
TL072
IC102:B
TL072
1
C113 .47u 63V
IC101:B
C104 .22u 63V
C108 .022u 50V
0
3
R122 11K
2
8
.1u 63V
C123 .47u 63V
C125 .47u 63V
6
CN101
7
E
D102 1N4148
C118 .1u 63V R121 10K
3 2 8 4
R125 10K
2
R136 10K C120 10u 16V
3
C124 1000u 16V
F
IC103:A
1
BA4558
L.L
D109 1N4148 R126 220K
R128 180K
R132 3K3 R133
R135 10K
7
6
L.L
5
F
D110
GRN
3 2 1
2 3
100K Q102 A1015
1
1
G
C111 22u 16V R138 1K
C119 .1u 63V R129 220K
G
Q103 A1015 R134 2 3K3
RED
H 1 2 3 4 5 6 7 8 9 10
3
H
23
Entra Subwoofer
A B
Power Amp Schematic
C
V+ V1+
D
E
F
1
R742 2K2 BC501 7 6 5 4 3 2 1
+15V -15V AC1
C720 R703 22K 100u/63V
C718 .1u (C)
R713 1K5
R714 100 Q703 BF470
JP1 JUMP R725 100K R723 D714 1N4148 D712 1N4002 C710 470p Q705 2N5551 47K 1/4W C716 TIP31F 220p Q707 R726 100 1/4W R727 1K 1/2W D708 1N4148 D709 1N4148 R729 1K 1/2W R730 100 1/4W Q708 R731 100K TIP32F 220p C717 2SA1386 D710 1N4002 Q709 2SC3519 R609 10 1W
1
C703 220p R743 560 C704 47u 16V
+15V
+15V
R712 100K
-15V
R709 15K
C712 22p
C714 470p Q701 2N5551 R720 3K3
33 1/4W
C501 4u7 50V D806 1N4002 R607 15K R502 22K
R503 10K IC501:A BA4558
3 2
+ -
1 4
4
C701 10u 16V
R702 1K C702 220p R701 22K
C707 IC701:A BA5532 .1u 2 - (C)
3 1
R710 2K2 D715 1N4148 D716 1N4148
2SD669
D713 1N4148
R715 270 R716 39K R717 270 R721 1K5
Q711
C709 .1u (PE)
8
R732 68 1/2W
R734 .1 3W
J601 CON601 C606 .1u (PE) R608 10 1W J602
2
R504 10K
Q501 2SC1815 Q502 2SC1815 R505 47K
+
C708 .1u (C)
8
R506 1K
-15V
R728 Q706 2N5401
R508 22K C503 .022u (PE)
R733 68 1/2W
R735 .1 3W
RLY601 D601 1N4002
2
D501 1N4148
+15V
C502 47u 16V
R507 1K
R711 15K
-15V
Q702 2N5401 C713 22p C715 470p R724 33 1/4W Q704 BF469 R719 100 JP2 JUMP
V-
C711 470p D717 1N4002
Q710 D711 1N4002
R509 R511 100 499K
7 6 5
R510 10K R512 10K R513 499K
C723 10u 16V C721 100u/63V C719 .1u (C) R718 1K5
IC501:B BA4558
V1-
3
C601 .1u (PE) R603 220K R601 10K 2N5401 1 Q601 R602 4K7 R604 47K C608 2 3
IC601 UPC1237HA 4 5 6 7 .0022u (PE)
8
R739 1K 1W D807 30V
V+
3
C603 4u7 50V C604 47u 16V R605 47K R606 10K
C605 100u 16V C607 .1u (PE)
TH601 TSA-104
R610 10K Q602 2SC1815
4
R611 270K Q603 2SC1815
4
00303-2
A
B
C
D
E
F
24
Entra Subwoofer
Power Supply Schematic
1 A B
2
3
4
CON302
5
6
7
8 A
3
2
1
V+
R303
Q301
B
S1
C309 F301 T3A/250V R304 2 2L1 10 12 13 14 5 16 KBU8D C304 4700u/63V BD2 C303 4700u/63V 8K2
1K1W 2SD882 C307 22U/16V C305 220/16V ZD301 HZ15-3 CON301
1 2
C
U3
0.01u/250V
L N
AC PLUG
C2 0.1u C3 0.1u
R301 8K2
C
C306 220/16V
ZD302 HZ15-3 C308 22U/16V
3
3 4
1K 1W
2SB772 Q302
E
00319
V-
2
1
D
R302
D
E 2 3 6 7 8
1
25