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BASS20

REF. NO.

PART NO.

DESCRIPTION

QTY

R26, 28

RS1717

SMD RES 100

5% 1/8W 12 P

2

R29

RS1716

SMD RES 33.2K 1% 1/8W 120 P

1

R30

RS1711

SMD RES 220

5% 1/8W 12 P

1

R35

RS1912

SMD RES 11K

5% 1/8W 120 P

1

R36, 41

RS2180

470W 1W (early versions: 1K 1W)

2

R37

RS1703

SMD RES 2.2K

5% 1/8W 12 P

1

R43, 44

RS1968

SMD RES 2.2M

5% 1/8W 12 P

2

R47, 55

RS1767

SMD RES 1 M

5% 1/8W 120 P

2

R51

RS1793

SMD RES 475K 1% 1/8W 12 P

1

R56

RS1722

SMD RES 470

5% 1/8W 12 P

1

R1P, 1AP, 2P RS1868

RES. W/W 0.1

5% 5W RAD P

4

2AP

R3P, R7P

RS1994

RES. 100

, 5%, 1/4W, C/F, T/R

2

R5P, R6P

RS1916

RES. C/F 5.1

5% 1/4W T/ P

2

Transistors

Q1

TR1135

TRANSISTOR PNP 2N5401

1

Q2

TR1108

TRANSISTOR 2SC2412 SMD NPN

1

Q4

TR1134

TRANSISTOR 2N5551 NPN

1

Q5

TR1167

TRANSISTOR 2N5551 NPN

1

Q6

TR1131

TRANSISTOR DTC114TK SMD NPN 1

Q7

TR1063

TRANSISTOR MPS2222A NPN

1

Q8

TR1166

TRANSISTOR PNP 2N5401

1

Q1P, Q1AP

TR1245

TRANSISTOR NPN TIP35E

2

Q2P, Q2AP

TR1246

TRANSISTOR PNP TIP36E

2

Q3P

TR1247

TRANSISTOR NPN TIP32E

1

Q4P

TR1248

TRANSISTOR PNP TIP31E

1

REF. NO.

PART NO.

DESCRIPTION

QTY

Miscellaneous

L1

SA0000042

AIR CORE INDUCTOR 1.8uH MI

1

LED1

LE1032

LED BICOLOR RED/GREEN 5mm. PI 1

SW1

SW1070

SWCH SLIDE SP3T RIGHT AN PI

1

24

SW1075

SWITCH ROCKER 2P2T

1

SNAP (230V ONLY)

TH1

TH1006

NTC THERMISTOR 10K

@25 P

1

TRIAC

TY1001

MAC224-4 TRIAC 200V 25A

1

XFORMR

MI1130

POWER TRANSFORMER (120V)

1

MI1176

POWER TRANSFORMER (230V)

1

Date

Rev. No.

Changes Made

3/21/96

1

Increment And Transistor Voltage To 140v

6/19/96

2

R11 changed from

27K

to 51K

R12 changed from

51K

to 24K

R9 changed from

20K

to 200K

R10 changed from

33K

to 200K

R29 changed from

11K

to 33K

R51 changed from

160K

to 470K

R39 changed from

47K

to 10K

R54 changed from

47K

to 10K

R22 changed from

15K

to 4.7K

R34 changed from

15K

to 4.7K

R20 changed from

220

to 160

R40 changed from

220

to 160

R33 changed from

4.3K

to 4.7K

C5changed from

.1

µ

F

to .033

µ

F

C7 changed from

.1

µ

F

to .033

µ

F

C11 changed from

.1

µ

F

to .022

µ

F

C15changed from

.047

µ

F to 3300

ρ

F

C21 changed from

100

ρ

F

to 330

ρ

F

Fuse changed from

3A

to 5A

C19 changed from

22

µ

F/16V to 22

µ

F/63V

C28 changed from

22

µ

F/16V to 22

µ

F/63V

R5P changed from

10

to 5.1

R6P changed from

10

to 5.1

C1 changed from 4700

µ

F/50V to 4700

µ

F/63V

C2 changed from 4700

µ

F/50V to 4700

µ

F/63V

Date

Rev. No.

Changed Made

6/19/96

3

R

was added from 100 -Dwg Rev.03

C

was added from 0.1

µ

F/100V -Dwg Rev.03

CX, CY added from 470

ρ

F - Dwg Rev.03

6/24/96

4

PC1132-1 was changed to PC1132-2
Q1AP was added
R1AP, R2AP were added from 0.1ohm
Q2AP was added
R2P was added from 100
C4P was added from 0.1

µ

F/100V

CX, CY were changed from 470

ρ

F to C2P, C3P

DIP, D2P were deleted

7/290/96

5

R20 changed from

220

to 160

R40 changed from

220

to 160

R5P changed from

10

to 5.1

R6P changed from

10

to 5.1

7/29/96

4

R29 was deleted from 33K
R9 was deleted from 200K
R51 was deleted from 470K
R10 was deleted from 200K
C7 was deleted from 0.033

µ

F 10%

R29 was added from 33.2K 1%
R9 was added from 200K 1%
R51 was added from 475K 1%
R10 was added from 200K 1%
C7 was added from 0.033

µ

F 5 %

REVISIONS

Summary of Contents for JBL BASS20

Page 1: ...ERVICE MANUAL SERVICE MANUAL Powered Subwoofer JBL Consumer Products Inc 80 Crossways Park West Woodbury N Y 11797 1 800 336 4JBL in the USA A Harman International Company Part No 1112 JBLBASS20 BASS2...

Page 2: ...nputs Line Level and Speaker Level Outputs Full Range Speaker Crossover Frequency 120Hz Frequency Response 40Hz 120Hz 3dB External Dimensions Inches Height 17 3 4 Width 10 Depth 24 External Dimensions...

Page 3: ...methods and design refinements are introduced into existing models without notice as a routine expression of our design philosophy For this reason Bass Series loudspeakers may differ in some respect...

Page 4: ...TO position and turn LEVEL control full clockwise 9 Green LED should light immediate bass response should be heard and felt from port tube opening Sweep Function 1 Follow steps 1 4 above using a sweep...

Page 5: ...blies for easier access Circuit board does not have to be removed from heatsink 2 R36 See drawing cut trace connecting Q4 collector and main C1 pad 3 Create solderable surface on PCB on Q4 side of cut...

Page 6: ...5 Powered Subwoofer BASS20 BASS 20 120v US 230v European Versions BLOCK DIAGRAM...

Page 7: ...6 Powered Subwoofer BASS20 BASS20 120V 230V versions AMPLIFIER EXPLODED VIEW...

Page 8: ...7 Powered Subwoofer BASS20 BASS20 CABINET ASSEMBLY EXPLODED VIEW...

Page 9: ...P 3 C9 12 27 29 CP1417 CAP ALUM EL 22uF 20 16V P 4 C11 CP1178 CAP POLY FILM 22nF 5 63V P 1 REF NO PART NO DESCRIPTION QTY C14 16 CP1426 SMD CAP 0 1uF 20 50V Z5U P 2 C15 CP1479 SMD CAP 3300pF 10 100V X...

Page 10: ...96 1 Increment And Transistor Voltage To 140v 6 19 96 2 R11 changed from 27K to 51K R12 changed from 51K to 24K R9 changed from 20K to 200K R10 changed from 33K to 200K R29 changed from 11K to 33K R5...

Page 11: ...1 0 Powered Subwoofer BASS20 BASS20 PACKAGING VIEW MUSIC20 SCS120...

Page 12: ...1 1 Powered Subwoofer BASS20 PRINTED CIRCUIT BOARDS TOP VIEW...

Page 13: ...1 2 Powered Subwoofer BASS20 PRINTED CIRCUIT BOARDS BOTTOM VIEW...

Page 14: ...1 3 Powered Subwoofer BASS20 INTEGRATED CIRCUIT DIAGRAM...

Page 15: ...1 4 Powered Subwoofer BASS20 120V SCHEMATIC DIAGRAM...

Page 16: ...1 5 Powered Subwoofer BASS20 230V SCHEMATIC DIAGRAM...

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