JBL BassPro II Service manual

BassPro™II
Powered Subw oofer
SERVICE MANUAL
Woodbury, New York 11797 Rev0 6/2003
BassPro II
1
CONTENTS
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .. . . . . . . . . .. . . . . . . 1
DETAILED SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . ………….. . . . . . . . . . 2
CONNECTIONS . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . 3
CONTROLS & FUNCTIONS. . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . 5
BASIC TROUBLESHOOTING. . . . . . . . . . . . . .. . . . . . . . . . . . . . ... . . . . . . . . . 6
REMOTE LEVEL CONTROL. . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . .. . . . . 7
EXPLODED VIEW. . . . . . . . . . . . . . . . .. . . .. …… . . . .. . . . .. . .. .. . . . . …... … . 8
BLOCK DIAGRAM . . . . . . . . . . . . . .. . . . . . . ……... . . . . . . .. . .. . . . . . . . …... 9
PCB DRAWINGS. …………… . . . . ………………………………………………. . 10
ELECTRICAL PARTS LIST …………. .... . .. …. . . . .……….. . . . . . .. .. . . . . . . 13
IC – TRANSISTOR PINOUTS . … . . .. . . . …. . . …….…………... . …. . . . . . . . 15
SCHEMATIC DIAGRAM.. . . . . . . . . .. .. .. .. . . ….. .. . ….………... . . . . . . . . . . .16
PACKING ………………. . . . . .. . . . . . . . .. .. . …… . .. .. . . . . . . . . … . . . . . . . . 17
BASS PRO II BASIC SPECIFICATIONS
Ampli fier pow er : 100 Watts Frequency response: 20Hz – 120Hz Fuse rating: 20A Max curr ent draw : 12A Idle current draw: <800mA Input sensitivity: 50mV to 4V Line-level input; 1V to 16V universal interface Crossover fr equency: 70Hz – 120Hz Crossover sl op e: 12dB Dimensions (L x W x H): 16-1/8" x 9-1/2" x 12-1/4" (includes mounting feet)
(410mm x 242mmx 312mm)
JBL continually strives to update and improve existing product s, as well as create new ones. The specific ations and details in this and related JBL publications are theref ore subjec t to change without notice.
BassPro II
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BASSPROII AUTO SUBWOOFER SPECIFICATIONS
GENERAL CONDITIONS: TEST INPUT SIGNAL FOR LINE IN – 2CH/60Hz/250mV.
TEST OUTPUT – 1 W ATT 4 Ohms LOAD (Bridge).
POWER SOURCE DC14.4V/12A min
TEST CONDITIONS: ALL TEST SIGNALS FROM LINE IN UNLESS OTHER REMARKS.
CROSSOVER VR AT MAX POSITION UNLESS OTHER REMARKS.
UNIT NOMINAL LIMIT
1. TOTAL OUTPUT POWER W 100
2. OUTPUT POWER (1 CHANNEL) (60, 400; 5.0% THD)
W 22 20
3. THD AT 1.0W (60,250;)
4. SIGNAL TO NOISE RATIO (60,250; O/P=1W;)
5. FREQUENCY RESPONSE (-- , 250; O/P=1W)
180Hz -6.5+/-3
6. CROSSOVER RANGE (120,250,O/P=1W,MAX REF)
7. CROSSOVER SLOPE dB 12
8. INPUT SENSITIVITY
(60, --;O/P=18W,L+R, GAIN MAX)
(60, --;O/P=18W, 2CH,GAIN MAX)
9. MAX GAIN NOISE, GAIN MAX )
10. MIN GAIN NOISE, GAIN MIN )
MAX TO MIN dB -12+/-3
LOW – INPUT
% 0.3 0.5 MAX
dB 70 65 MIN
(60-120HZ) dB 60Hz 0REF
120Hz -1.6+/-3
mV 340 +/- 60
HI – INPUT
mV 0.8 1.5 MAX
mV 0.5 0.9 MAX
V 3.5 +/- 0.6
11. AUTO SENSE (--, --, HI-N, 1CH)
12. PROTECTION CIRCUIT
(60,250,O/P=10W)
13. FUSE RATING A 20
14. MAXIMUM CURRENT DRAW A 12
15. IDLE CURRENT DRAW mA <800
16. DIMENSIONS
AUTO ON LEVEL V 1.8
AUTO OFF TIME MIN 3.0 +/- 1.5
SHORT SPK TERMINAL +/- Functional
16 1/8 X 9 ½ X 12 ¼”
(410 X 242 X 312MM)
+/- 0.5
POWER CONNECTIONS
Connecting power to BassProII is shown in
Figure 7. Please observe
the following installation tips:
When using the high-level input con­nections, BassProII will automatically turn on when you turn on your radio. In this case, the remote (REM) con­nection is not needed. Use at least #20 AWG speaker wire for speaker-level input connections.
Use at least #12 AWG wire for the Positive Battery (BATT+12) and Ground () connections. If needed, use at least #20 AWG wire for the remote (REM) turn-on connection.
Connect BassProII’s “BATT +12V” terminal directly to the battery’s posi­tive (+) terminal. Install a fuse holder, with a 20A fuse, within 18" of the bat­tery’s positive (+) terminal.
BassPro
(right-side panel)
Chassis Ground
(Bare Metal)
Source Unit
Battery
Fuse 20 A
18"
Remote
Turn-On
Route all power wires through a grom­met in the vehicle’s firewall. If a factory grommet is not available, install one. Connect a short ground wire from BassProII’s ground terminal ( ) to the nearest bare metal surface. For a good connection, use sandpaper to clear paint from the metal surface and use a screw with a lock (star) washer.
The remote (REM) connection requires a +5 to +12 Vdc signal for BassProII to turn on when using the line-level connections. Most head units with preamp outputs provide this remote voltage signal. As an alternative, connect this terminal to a switched ignition circuit.
Figure 7.
Chassis Ground
(Bare Metal)
Battery
Source Unit
Remote Turn-On
Fuse 20A
18"
BassProII Connection Panel
BassPro II
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APPLICATIONS
BassProII is equipped with two line­level (RCA) inputs and two high-level inputs. To help you plan the installation of BassProII, we have included two system application diagrams in Figures 8 and 9. For more installation suggestions, contact your local authorized JBL car audio dealer.
Splices
(not supplied)
Splices
(not supplied)
Figure 9. Line-level connections with two outputs (single full-range or subwoofer).
Figure 8. High-level connections. Connect BassProII’s high-level inputs to either the front or rear speaker outputs of your head unit (splice crimps not included).
BassProII
Connection Panel
Subwoofer Level Control
BassProII
Connection Panel
Subwoofer Level Control
Left Speaker
Right Speaker
Source Unit
Source Unit
LF Speaker
RF Speaker
LR Speaker RR Speaker
RCA Stereo Cables
(not supplied)
BassPro II
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CONTROLS AND FUNCTIONS
BassProII has controls and indicators that help simplify sonic integration with almost any vehicle’s unique acoustic properties. These controls are located on the amplifier panel, as shown in Figure 10.
Power LED Gain Control Crossover Remote Bass Control Auto Turn-On
POWER LED: This indicator will glow red when the BassProII is operating.
GAIN CONTROL: Use this control to adjust the relative volume (loudness) of BassProII with the other speakers in the vehicle.
CROSSOVER: Use this control to adjust the amount of high-frequency information present in BassProII’s out­put. A lower value signifies less high­frequency content.
3. Turn the head unit ON and play a selection of your favorite music track that has substantial bass.
4. Adjust the CROSSOVER control counterclockwise, until you hear only low-frequency information. Example – you should not hear vocals coming from BassProII when seated in the normal listening position.
5. Adjust the BASS CONTROL either clockwise or counterclockwise to suit your taste, and to avoid audible distortion.
6. If you elect not to install the Remote Bass Control, adjust the GAIN control to the maximum level that provides undistorted output from the BassProII, with the head unit’s volume control at its 3 o’clock setting.
NOTE: In most cases the above steps will provide you with satisfactory results. However, the actual process may require several readjustments of each control, since the settings will interact with one another. If necessary, consult your authorized JBL car audio dealer for help in tuning your system.
AUTO TURN-ON: For speaker­level connections, used this switch to activate (or deactivate) BassProII’s automatic turn-on circuit. For most speaker-level applications, slide the switch to the AUTO position. If you prefer to use the remote (REM) connection, slide the switch to the OFF position.
REMOTE BASS CONTROL: Use this RJ-11 jack
to connect the supplied remote bass control.
SETTING THE CONTROLS:
1. Make sure the head unit is off and VOLUME control is set to minimum.
2. On BassProII’s amplifier panel, set the CROSSOVER to its maximum frequency of 120Hz, as shown in
Figure 10.
NOTE: If using the REMOTE BASS
CONTROL, set GAIN to maximum and set the BASS CONTROL to the midpoint.
Figure 10.
BassPro II
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