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: |
100W |
RMS Power Handling: |
300W |
Max Power Handling: |
20Hz - 160Hz |
Frequency Response: |
40 - 120Hz |
Active Crossover: |
4 Ohms |
Impedance: |
0 - 180° |
Phase control: |
0 to +6dB @ 40Hz |
Dimensions (H x W x D): |
625 x 320 x 315 mm |
August 02
BTX-250 SPARE PARTS
POWER AMP
POS |
ITEM NO. |
DESCRIPTION |
QTY |
|
ASYJBL50 |
PCB ASSY AMP JBL50 |
1 |
|
027112092 PCB |
CSA50 POWER 112X92MM PCB Blank |
1 |
Q1,Q3,Q4,Q6,Q7,Q8,Q103,Q104 |
122SA1015 TRANSISTOR |
TOSHIBA 2SA1015 250MA 60V 0.4W |
8 |
Q2,Q5,Q101,Q102,Q112 |
122SC1815 TRANSISTOR |
TOSHIBA 2SC1815 250MA 60V 0.4W |
5 |
Q13,QM1 |
123T0K30A TRANSISTOR |
MOS K30A (T0-92) |
2 |
Q11,Q12 |
123TRFZ44 TRANSISTOR |
IR IRFZ44V 60V 55A 115W |
2 |
Q106 |
124T0SA06 TRANSISTOR |
TR MOTOROLA MPSA06 N 0.5A 80V |
1 |
Q107 |
124T0SA13 TRANSISTOR |
TR MOTOROLA MPSA13 N 0.5A 30V |
1 |
Q105 |
124T0SA56 TRANSISTOR |
TR MOTOROLA MPSA56 P 0.5A 80V |
1 |
Q110 |
128TTI35C TRANSISTOR |
TR SGS OR TI TIP35C N 25A |
1 |
Q111 |
128TTI36C TRANSISTOR |
TR SGS OR TI TIP36C P 25A 100V |
1 |
Q109 |
129TB647A TRANSISTOR |
TR HITACHI 2SB647AC 100V 1A |
1 |
Q108 |
129TD667A TRANSISTOR |
TR HITACHI 2SD667AC 100V 1A |
1 |
D2,D3,D4,D5,D8,D9 |
131TN4148 DIODE |
NS 1N4148 HSS 150MA 100V 52MM |
6 |
ZD1,ZD2 |
133T0015B ZENER DIODE |
NEC RD15EB3 ZNR 0.5W 15V 52MM |
2 |
D1 |
134TN5402 RECTIFYING DIODE |
1N5402 RET 3.0A 100V |
1 |
D7 |
136T1220A FAST RECOVER RECTIFIER |
F12C20A 12A 200V (TO220) |
1 |
D6 |
136T1220C FAST RECOVER RECTIFIER |
F12C20C 12A 200V (TO220) |
1 |
U1 |
158TTL494 IC DIP16 |
NEC UPC494 OR TI TL494 |
1 |
L1 |
174114005 INDUCTANCE |
DIOX30 D=2.1 5.0UH(VERTICAL TYPE) |
1 |
T1 |
181T02804 POWER TRANSFORMER |
JBL-50 28 6:16 VARNISH T2804 |
1 |
R33 |
220440101 RESISTOR |
CARBON CR 1/4W 100Ω J |
1 |
R30 |
220440242 RESISTOR |
CARBON CR 1/4W 2.4KΩ J |
1 |
R10 |
220880100 RESISTOR |
CARBON CR 1/6W 10Ω J |
1 |
R5,R25,R26,R104,R105,R111,R112 |
220880101 RESISTOR |
CARBON CR 1/6W 100Ω J |
7 |
R12,R19,R20,R21,R22,R113,R122 |
220880102 RESISTOR |
CARBON CR 1/6W 1KΩ J |
7 |
R1,R8,R9,R28,R102,R124,RM1 |
220880103 RESISTOR |
CARBON CR 1/6W 10KΩ J |
7 |
R125 |
220880133 RESISTOR |
CARBON CR 1/6W 13KΩ J |
1 |
R18 |
220880153 RESISTOR |
CARBON CR 1/6W 15KΩ J |
1 |
POWER AMP
POS |
ITEM NO. |
DESCRIPTION |
QTY |
R11 |
220880201 RESISTOR |
CARBON CR 1/6W 200Ω J |
1 |
R118 |
220880221 RESISTOR |
CARBON CR 1/6W 220Ω J |
1 |
R16,R101,R121,R123 |
220880222 RESISTOR |
CARBON CR 1/6W 2.2KΩ J |
4 |
R107,R110 |
220880272 RESISTOR |
CARBON CR 1/6W 2.7KΩ J |
2 |
R15 |
220880273 RESISTOR |
CARBON CR 1/6W 27K OHM J |
1 |
R114 |
220880302 RESISTOR |
CARBON CR 1/6W 3KΩ OHM J |
1 |
R14,R17 |
220880333 RESISTOR |
CARBON CR 1/6W 33KΩ J |
2 |
R115 |
220880432 RESISTOR |
CARBON CR 1/6W 4.3KΩ J |
1 |
R116,R117 |
220880470 RESISTOR |
CARBON CR 1/6W 47Ω J |
2 |
R2,R3,R4,R6,R7,R13 |
220880472 RESISTOR |
CARBON CR 1/6W 4.7KΩ J |
6 |
R108,R109 |
220880512 RESISTOR |
CARBON CR 1/6W 5.1KΩ J |
2 |
R103,R106 |
220880681 RESISTOR |
CARBON CR 1/6W 680Ω J |
2 |
R27 |
220880683 RESISTOR |
CARBON CR 1/6W 68KΩ J |
1 |
R29 |
231100220 RESISTOR |
METAL MO 1W 22Ω J |
1 |
R31,R32 |
231100681 RESISTOR |
METAL MO 1W 680Ω J |
2 |
R119,R120 |
23251001A CEMENT TYPE RESISTOR |
SQM 5W 0.1Ω (VERTICAL TYPE) |
2 |
RT |
261T05103 THERMISTOR |
NTC THERMISTOR D103J 10K |
1 |
C102,C107,C109 |
31JT10105 C/C |
C/C NPO 100PF/50V J |
3 |
C13 |
31JT68125 C/C |
C/C Y5E 680PF/250V K |
1 |
C1,C4,C8,C105,C110 |
31ZT10410 C/C |
C/C 0.1U/100V Z |
5 |
C108 |
32JT10410 M/C |
M/C 0.1UF/100V J (MINISIZE) |
1 |
C10 |
32JT68210 M/C |
M/C 0.0068UF/100V J |
1 |
C5,C9,C12,C18,C19,C22 |
340T10625 E/C |
10UF/25V 5*11 +20-10% |
6 |
C7,C11,C21,C106 |
340T10725 E/C |
100UF/25V 6*11 +20-10% |
4 |
C14,C15 |
340T22851 E/C |
2200UF/50V 16*32 +20-10% |
2 |
C103,C104 |
340T33725 E/C |
330UF/25V 8*14 +20-10% |
2 |
C101 |
340T47550 E/C |
4.7UF/50V 5*11 +20-10% |
1 |
C6 |
340T47625 E/C |
47UF/25V 5*11 +20-10% |
1 |
C3 |
341T22835 E/C |
2200UF/35V 18*27 105 |
1 |
J1,J2,J3,J4,J5,J6,J7,J8,J9,J10,J11,J12,C20,JP14 |
400T06520 JUMP WIRE |
JUMP 0.6*52MM |
14 |
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