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Service Manual

BTX250
250mm subwoofer and 250mm passive radiator combined with a 100W RMS amplifier housed in a specific enclosure, all carefully engineered to work together as a unique, integrated system. 12 dB/octave electronic low pass filter with selectable 40Hz-120Hz crossover frequency for precise frequency division to match any system Variable Bass Boost for up to 6dB more level at 50Hz Line-level and speaker-level Inputs to integrate seamlessly with virtually any factory-installed head unit Variable input sensitivity for compatibility with all source units and factory head units Effective protection circuitry against short circuit, overheating and over-current High-quality power, input and output connectors for clean, tight, long-lasting connections Power-On indicator led for visible indication of amplifier status

Specifications
Dynamic Range: CD: RMS Power Handling: Max Power Handling: Frequency Response: Active Crossover: Impedance: Phase control: Dimensions (H x W x D): 100W 300W 20Hz - 160Hz 40 - 120Hz 4 Ohms 0 - 180 0 to +6dB @ 40Hz 625 x 320 x 315 mm

August 02

BTX-250 SPARE PARTS POWER AMP POS ITEM NO. ASYJBL50 027112092 PCB 122SA1015 TRANSISTOR 122SC1815 TRANSISTOR 123T0K30A TRANSISTOR 123TRFZ44 TRANSISTOR 124T0SA06 TRANSISTOR 124T0SA13 TRANSISTOR 124T0SA56 TRANSISTOR 128TTI35C TRANSISTOR 128TTI36C TRANSISTOR 129TB647A TRANSISTOR 129TD667A TRANSISTOR 131TN4148 DIODE 133T0015B ZENER DIODE 134TN5402 RECTIFYING DIODE 136T1220A FAST RECOVER RECTIFIER 136T1220C FAST RECOVER RECTIFIER 158TTL494 IC DIP16 174114005 INDUCTANCE 181T02804 POWER TRANSFORMER 220440101 RESISTOR 220440242 RESISTOR 220880100 RESISTOR 220880101 RESISTOR 220880102 RESISTOR 220880103 RESISTOR 220880133 RESISTOR 220880153 RESISTOR DESCRIPTION PCB ASSY AMP JBL50 CSA50 POWER 112X92MM PCB Blank TOSHIBA 2SA1015 250MA 60V 0.4W TOSHIBA 2SC1815 250MA 60V 0.4W MOS K30A (T0-92) IR IRFZ44V 60V 55A 115W TR MOTOROLA MPSA06 N 0.5A 80V TR MOTOROLA MPSA13 N 0.5A 30V TR MOTOROLA MPSA56 P 0.5A 80V TR SGS OR TI TIP35C N 25A TR SGS OR TI TIP36C P 25A 100V TR HITACHI 2SB647AC 100V 1A TR HITACHI 2SD667AC 100V 1A NS 1N4148 HSS 150MA 100V 52MM NEC RD15EB3 ZNR 0.5W 15V 52MM 1N5402 RET 3.0A 100V F12C20A 12A 200V (TO220) F12C20C 12A 200V (TO220) NEC UPC494 OR TI TL494 DIOX30 D=2.1 5.0UH(VERTICAL TYPE) JBL-50 28 6:16 VARNISH T2804 CARBON CR 1/4W 100 J CARBON CR 1/4W 2.4K J CARBON CR 1/6W 10 J CARBON CR 1/6W 100 J CARBON CR 1/6W 1K J CARBON CR 1/6W 10K J CARBON CR 1/6W 13K J CARBON CR 1/6W 15K J QTY 1 1 8 5 2 2 1 1 1 1 1 1 1 6 2 1 1 1 1 1 1 1 1 1 7 7 7 1 1

Q1,Q3,Q4,Q6,Q7,Q8,Q103,Q104 Q2,Q5,Q101,Q102,Q112 Q13,QM1 Q11,Q12 Q106 Q107 Q105 Q110 Q111 Q109 Q108 D2,D3,D4,D5,D8,D9 ZD1,ZD2 D1 D7 D6 U1 L1 T1 R33 R30 R10 R5,R25,R26,R104,R105,R111,R112 R12,R19,R20,R21,R22,R113,R122 R1,R8,R9,R28,R102,R124,RM1 R125 R18

POWER AMP POS R11 R118 R16,R101,R121,R123 R107,R110 R15 R114 R14,R17 R115 R116,R117 R2,R3,R4,R6,R7,R13 R108,R109 R103,R106 R27 R29 R31,R32 R119,R120 RT C102,C107,C109 C13 C1,C4,C8,C105,C110 C108 C10 C5,C9,C12,C18,C19,C22 C7,C11,C21,C106 C14,C15 C103,C104 C101 C6 C3 J1,J2,J3,J4,J5,J6,J7,J8,J9,J10,J11,J12,C20,JP14 ITEM NO. 220880201 RESISTOR 220880221 RESISTOR 220880222 RESISTOR 220880272 RESISTOR 220880273 RESISTOR 220880302 RESISTOR 220880333 RESISTOR 220880432 RESISTOR 220880470 RESISTOR 220880472 RESISTOR 220880512 RESISTOR 220880681 RESISTOR 220880683 RESISTOR 231100220 RESISTOR 231100681 RESISTOR 23251001A CEMENT TYPE RESISTOR 261T05103 THERMISTOR 31JT10105 C/C 31JT68125 C/C 31ZT10410 C/C 32JT10410 M/C 32JT68210 M/C 340T10625 E/C 340T10725 E/C 340T22851 E/C 340T33725 E/C 340T47550 E/C 340T47625 E/C 341T22835 E/C 400T06520 JUMP WIRE DESCRIPTION CARBON CR 1/6W 200 J CARBON CR 1/6W 220 J CARBON CR 1/6W 2.2K J CARBON CR 1/6W 2.7K J CARBON CR 1/6W 27K OHM J CARBON CR 1/6W 3K OHM J CARBON CR 1/6W 33K J CARBON CR 1/6W 4.3K J CARBON CR 1/6W 47 J CARBON CR 1/6W 4.7K J CARBON CR 1/6W 5.1K J CARBON CR 1/6W 680 J CARBON CR 1/6W 68K J METAL MO 1W 22 J METAL MO 1W 680 J SQM 5W 0.1 (VERTICAL TYPE) NTC THERMISTOR D103J 10K C/C NPO 100PF/50V J C/C Y5E 680PF/250V K C/C 0.1U/100V Z M/C 0.1UF/100V J (MINISIZE) M/C 0.0068UF/100V J 10UF/25V 5*11 +20-10% 100UF/25V 6*11 +20-10% 2200UF/50V 16*32 +20-10% 330UF/25V 8*14 +20-10% 4.7UF/50V 5*11 +20-10% 47UF/25V 5*11 +20-10% 2200UF/35V 18*27 105 JUMP 0.6*52MM QTY 1 1 4 2 1 1 2 1 2 6 2 2 1 1 2 2 1 3 1 5 1 1 6 4 2 2 1 1 1 14

POWER AMP POS ITEM NO. 830062181 MICA SEGMENT 862T00100 FIBER TUBE 865T00080 CABLE TIE 178311908 HIGH FREQUENCY CORE PRE AMP ITEM NO. ASYJBL50P 027152065 PCB 137T03G00 LED 151T04558 IC SIP8 197T04212 SLIDE SWITCH 202T15203 VR 203T15203 VR 22022047A RESISTOR 220880102 RESISTOR 220880103 RESISTOR 220880104 RESISTOR 220880124 RESISTOR 220880153 RESISTOR 220880202 RESISTOR 220880222 RESISTOR 220880223 RESISTOR 220880224 RESISTOR 220880273 RESISTOR 220880472 RESISTOR 220880473 RESISTOR 231100101 RESISTOR 31JT10105 C/C 31KT10205 C/C 340T10725 E/C DESCRIPTION 3*4.5 (HOLE) 62*18mm T=0.1mm (1000MM) 1 100MM YJ-100 31*19*8MM DESCRIPTION JBL50 PRE CAR SUBWOOFER AMP JBL50 PRE 152X64MM PCB 94-V0 LED 3MM GREEN ROHM BA4558N 4P2T SS001-P242P PA12 16T1-2D8 (SINGLE)B20K L=15MM 16T1-2D8-B20K L=15MM CARBON CR 1/2W 4.7 J CARBON CR 1/6W 1K J CARBON CR 1/6W 10K J CARBON CR 1/6W 100K J CARBON CR 1/6W 120K J CARBON CR 1/6W 15K J CARBON CR 1/6W 2K J CARBON CR 1/6W 2.2K J CARBON CR 1/6W 22K J CARBON CR 1/6W 220K J CARBON CR 1/6W 27K OHM J CARBON CR 1/6W 4.7K J CARBON CR 1/6W 47K J METAL MO 1W 100 OHM J C/C NPO 100PF/50V J C/C Y5P 1000PF/50V K 100UF/25V 6*11 +20-10% QTY 1 0,04 1 1 QTY 1 1 1 4 1 2 1 4 3 10 2 1 2 1 1 3 1 3 2 1 2 8 2 2

POS

LED U1,U2,U3,U4 SW1 VR202,VR204 VR206 RH1,RH2,RH3,RH4 R213,R214,R222 RH7,RH8,RH9,RH10,R216,R224,R225,R226,R227,R228 R209,R210 R219 R205,R206 R221 R220 R207,R208,R217 R215 R203,R204,R218 R201,R202 R223 RH5,RH6 C1,C2,C3,C4,C203,C204,C205,C208 C201,C202 CH1,CH2

PRE AMP POS C210,C211 C212 J101 J2 J1 JK101 C7 C9 C5,C6 C8 C10 POS ITEM NO. 391T63334 MET CAPACITOR 391T63823 MET CAPACITOR 400T06520 JUMP WIRE 522TMP993 RCA SOCKET 531T42004 TERMINAL 571T15006 CONNECTOR W/WIRE 862T00100 FIBER TUBE 31JT22105 C/C 31JT47105 C/C 31JT47005 C/C 31KT10305 C/C 31ZT10410 C/C Miscellaneous ITEM NO. 445T00002 FUSE SOCKET 541T30203 TERMINAL STANDER 554T18270 UL HEAT-RESISTANT WIRE 560016270 UL HEAT-RESISTANT WIRE 560216270 UL HEAT-RESISTANT WIRE 571T30004 CONNECTOR W/WIRE 571260013 CONNECTOR W/WIRE 620112100 ASSISTANT HEATSINK 621T15040 RADIATOR LAYER 623T15061 RADIATOR LAYER 630150280 HEATSINK PLATE 711T12688 SCREW 711T13065 SCREW 711T13108 SCREW 711T14108 SCREW 711T14145 SCREW DESCRIPTION (BOX) 0.33U/63V J MEMB (BOX) 0.082U/63V J MEMB JUMP 0.6*52MM RED/WHITE 2P GOLD YLR-1009-316 4P SOCKET P=4.2MM 6P CONNECTOR W/WIRE 150MM 5MM (1000MM) 1 C/C Y5E 220PF/50V J C/C Y5E 470PF/50V K C/C NPO 47PF/50V J C/C Y5P 0.01UF/50V K C/C 0.1U/100V Z DESCRIPTION EXTERIOR FIXED (047-519) 3P PLATE WITH GOLD VERTICAL TYPE P=11mm 18AWG 270MM T=10*2 YELLOW 1015# 16AWG 270MM T1=5 T2=10 BLACK 1015# 16AWG 270MM T1=5 T2=10 RED 1015# 4P CONNECTOR W/WIRE 300MM 1007 20AWG 2P 1015#18AWG 600MM WITH 205#110# WHITE ALUMINUM 112X100X36 T=3 1 HOLE 1.5*15*38MM 3 HOLE 1.5*15*60MM 150*280 ALIMINUM EXTRACT PMS 2.6*8 MM PMS 3*6 MM ANODIZE BLACK PMS 3*10 MM PMS 4*10 MM PMS M4*14 MM ANODIZE BLACK QTY 2 1 1 1 1 1 0,02 1 1 2 1 1 QTY 1 1 1 1 1 1 1 1 1 1 1 2 2 4 2 4

Miscellaneous POS ITEM NO. 721T33128 SCREW 761T03501 WASHER 771TH0518 PCB FIXER 771TH5085 PCB FIXER 811T12007 KNOB 812T10000 WIRE FIXER 843T03310 SPONGE 842215016 SPONGE 842225115 SPONGE 843T14961 SPONGE 843T51010 SPONGE PAD 843T62296 FIBER SPACER 560216120 UL HEAT-RESISTANT WIRE 861T50000 SHRINK TUBE 865T00080 CABLE TIE 955T10000 STICKER 021103344 PCB 341T22835 E/C 562024080 UL HEAT-RESISTANT WIRE 178281709 HIGH FREQUENCY CORE 31KT10305 C/C 31ZT10410 C/C DESCRIPTION 3*12MM 3.5 ANODIZE BLACK COPPER 5*18X12MM COPPER 5X8.5X5MM FOR M-4000 L=50MM D=4.2MM BLACK CSA-25 EVA 33*10*2 JBL-50 EVA20150*16*3 JBL-50 EVA20250*16*3 EVA 152*64*14 10*10*5 MM 24X11.6X1 MM FOR CSA 16AWG 120MM T1=5 T2=10 RED 1015# D=6MM (1000MM) BLACK 100MM YJ-100 45X9 CE STICKER(SILVER SER.NO. B..) JBL50SP 33*44.5mmT=1.6 94V0 2200UF/35V 18*27 105 24AWG 80MM T=10MMX2 BLACK 1007# 28.5*17.5*9.5mm C/C Y5P 0.01UF/50V K C/C 0.1U/100V Z QTY 1 2 2 4 3 1 1 2 2 1 1 1 1 0,09 3 1 1 1 1 1 1 1

1

2

3

4

5

6

7

8

MODEL:JBL-50

D CN01 Q1 A1015 5uH D2 4148 C5 10/25V R4 4.7K R3 4.7K R5 100 C4 104/C C3 2200/35V D1 1N5402 15A L1 F1 3 2 1 PGND REM +12V

D

R1 10K R2 4.7K 4148 R19 1K Q7 A1015 R25 100 R21 1K Q11 R29 22/1W F12C20C 2200/50V C TL494CN C6 R6 4.7K 47/25V R8 10K U1 C13 Q8 R20 1K D5 A1015 R22 1K R26 100 Q12 T1 -VCC 6:16(D28) D9 1N4148 F12C20A R27 68K R28 10K D8 1N4148 D3 4148 Q6 A1015 Q5 C1815 C8 104/C R7 4.7K C7 100/25V 1K 4.7K +VCC +VCC 680/1W ZD1 15V R11 200 C9 10/25V R14 33K R17 33K C12 10/25V ZD2 R18 PRO 15K -VCC 680/1W R32 15V -15V C19 10/25V C18 10/25V Q13 K30A C22 10/25V 681/C D7 C15 2200/50V C14 Q2 C1815 D4 Q7~Q8 IRFZ46N D6 +VCC

16

15

14

13

12

11

10 E2 GND 7

VCC

REF

+

CON

C

FED

OP2

R10

1

2

3

4

5

6

10 Q3 A1015

8

OP1

DT

C

R

+

-

E1

-

9

4148 R9 10K R15 27K C10 682/M R16 2.2K C11 100/25V

MUTE

C21 100/25V

RT 10K

Q4 A1015

R12 B

R13

R31 +15V B

R33 100/1/4W +VCC

R30 2.4K/1/4W

C1 C20 104/C 473/C LED GREEN

A

A

1

2

3

4

5

6

7

8

1

2

3

4

D
LIN R201 4.7K J1A C201 102/C R203 27K BA4558 R207 22K C203 100/C U1A

D

R205 15K

U2A BA4558

C206

C207 U2B R220 2.2K U3A BA4558 BA4558

104/B CH1 HI-LIN RH1 4.7/1/2W RH7 10K RH5 RH3 4.7/1/2W R214 1K 100/1W 100/25V R209 100K RH9 10K R213 1K R216 10K R215 220K R217 22K C205 100/C R218 27K

104/B

R219 120K

C

J2A

R221 20K C208 100/C

C

VR201 B20K

VR202 C500K C209 0.047 R222 20K C210 0.022B R223 47K SW201 U3B BA4558

RIN R202 4.7K J1A C202 102/C R204 27K

U1B BA4558

JBL50P

R208 22K C204 100/C R206 15K U4A R226 10K R227 10K R228 10K C212 823/B

B

B
U4B BA4558 VR203A V20K R225 10K C211 334/B VR203B V20K R224 10K

HI-RIN

RH2 4.7/1/2W

RH8 10K RH6 100/1W

CH2 100/25V

SIN
R210 100K

BA4558

J2A RH4 4.7/1/2W

RH10 10K

A

A

1

2

3

4

1

2

3

4

D

D

+VCC +15V
R116 47 Q110 TIP35C

R103 680 Q101 C1815 C101 R101 2.2K 4.7/50V

R107 2.7K

MODEL:JBL-50
Q102 C103 330/25V C1815 C107 100/C

Q105 A56

Q108 D667

PRO
R124 10K

CH1OUT

R108 5.1K

R121 Q112 R119 2.2K C110 104/C Q107 A13 R115 4.3K R118 220 R120 0.1/5W R122 1K R123 2.2K C1815

C
R102 10K C102 100/C R105 100 R112 100 R113 1K C108 104/M R04 100 R109 5.1K R111 100 C105 104/C C104 Q103 A1015 RM1 10K QM1 K30A R106 680 R110 2.7K 330/25V Q104 A1015 C109 100/C R114 3K

0.1/5W

C

ROUT

C106 100/25V

B

MUTE

Q106 A06

Q109 B647 R117 47

B
Q111 TIP36C

-15V

-VCC
R125 13K

A

A

1

2

3

4