jbl BTX 250.pdf

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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.
Specifications
Dynamic Range: CD:
100W
RMS Power Handling:
300W
Max Power Handling:
20Hz - 160Hz
Frequency Response:
40 - 120Hz
• 12 dB/octave electronic low pass filter with
selectable 40Hz-120Hz crossover frequency for
precise frequency division to match any system
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
• 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
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August 02
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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
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