BOSE TOUCHTUNES JUKEBOX Schematic
Contents
Safety Information............................................................................................................................ 2
Electrostatic Discharge Sensitive (ESDS) Device Handling ........................................................ 2
Jukebox Disassembly/Assembly Procedures............................................................................ 3-4
Jukebox Remote control ................................................................................................................. 5
Disassembly/Assembly Procedures .............................................................................................. 5
Figure 1. Remote Control Assembly Exploded View........................................................................ 5
Test Procedures ............................................................................................................................ 6-8
Part List Notes.................................................................................................................................. 9
Main Part List.................................................................................................................................... 9
Figure 2. Jukebox Assembly .......................................................................................................... 10
Figure 3. Woofer Wiring Diagram................................................................................................... 10
Figure 4. Rear Panel Assembly...................................................................................................... 11
Zone 1 Amp Electrical Part List ............................................................................................... 12-16
Zone 2 Amp Electrical Part List ............................................................................................... 17-19
I/O PCB Part List ....................................................................................................................... 20-22
Remote Control Part List............................................................................................................... 23
Figure 5. Remote Control Exploded View ...................................................................................... 23
®
JB Part List.............................................................................................................................. 24
141
Figure 6. 141JB Exploded View ..................................................................................................... 24
ZONE 2 Speaker Connections Greater Than 3.2
Figure 7. Zone 2 External Speaker Connections ........................................................................... 25
ZONE 2 Speaker Connections Less Than 3.2
Figure 8. Low DC Resistance Connections ................................................................................... 26
Figure 9. Low DC Resistance Connections ................................................................................... 26
Troubleshooting Tips..................................................................................................................... 27
Figure 10. Audio Section Wiring/Block Diagram ............................................................................ 28
Figure 11. Control Section Wiring/Block Diagram .......................................................................... 29
Cable Drawings ......................................................................................................................... 30-31
Ω ..................................................................... 25
Ω.......................................................................... 26
Caution: The TouchTunes Digital Jukebox contains no user serviceable parts. To prevent warranty infractions, refer servicing to warranty service stations or factory service.
PROPRIETARY INFORMATION
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF
BOSE® CORPORATION WHICH IS BEING FURNISHED ONLY FOR
THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT
BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE
BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED
FOR ANY OTHER PURPOSE.
1
SAFETY INFORMATION
1. Parts that have special safety characteristics are identified by the symbol on
schematics or by special notes in the part lists. Use only replacement parts that
have critical characteristics recommended by the manufacturer.
2. Make leakage current or resistance measurements to determine that exposed
parts are acceptably insulated from the supply circuit before returning the unit
to the customer. Use the following checks to perform these measurements:
A. Leakage Current Hot Check: With the unit completely assembled, plug the AC line cord
directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a
leakage current tester or a metering system that complies with American National Standards
Institute (ANSI) C101.1 "Leakage Current for Appliances" and Underwriters Laboratories (UL)
813. With the unit's AC switch first in the ON position and then in the OFF position, measure
from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal parts of the
unit (antennas, handle bracket, metal cabinet, screw-heads, metallic overlays, control shafts,
etc.), especially any exposed metal parts that offer an electrical return path to the chassis. Any
current measured must not exceed 0.75 milliamp. Reverse the unit's power cord plug in the
outlet and repeat the test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED
HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE UNIT TO THE CUSTOMER.
B. Insulation Resistance Test Cold Check: (1) Unplug the power cord from the wall outlet
and connect a jumper wire between the two prongs of the plug. (2) Turn on the power switch of
the unit. (3) Measure the resistance with an ohmmeter between the jumpered AC plug and
each exposed metallic cabinet part on the unit. The reading should be between infinite. When
there is no return path to the chassis, the reading must be "infinite". If it is not within the limits
specified, there is the possibility of a shock hazard, and the unit must be repaired and rechecked before it is returned to the customer.
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS)
DEVICE HANDLING
This unit contains ESDS devices. We recommend the following precautions when repairing,
replacing or transporting ESDS devices:
• Perform work at an electrically grounded work station.
• Wear wrist straps that connect to the station or heel straps that connect to conductive floor
mats.
• Avoid touching the leads or contacts of ESDS devices or PC boards even if properly
grounded. Handle boards by the edges only.
• Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert
unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags,
bubble wrap or plastic trays.
2
JUKEBOX DISASSEMBLY/ASSEMBLY PROCEDURES
Note: Refer to Figures 2 and 4.
1. Rear Panel Access
1.1 Using the Jukebox key, unlock the front
drawer and slide the front drawer out.
Note: Make sure that the shipping screw
has been removed.
1.2 Lift up the rear panel release handle
and push the handle toward the rear until
the handle locks into place.
Note: The rear panel can be fully opened
by removing the locking pin that secures
the rear panel release handle to the rear
panel.
2. Rear Panel Closure
2.1 Pull the rear panel release handle
forward until the rear panel is fully seated
and the release handle is locked in the
catch.
2.2 Slide the front drawer back into the
Jukebox and with the key, lock it into place.
3. Amplifier/EQ Module Removal
3.1 Perform procedure 1.
3.2 Remove the four screws (11) that
secure the bracket adaptor to the rear
panel and the lift off the bracket adaptor.
Note: If you are replacing the amplifier
assembly, perform procedure 5.2-5.3 and
save the adaptor bracket.
3.3 Located under the equalizer PCB and
the adaptor bracket is the amplifier assembly. Lift up the amplifier assembly to remove it.
3.4 Disconnect the transformer primary
(J7), transformer secondary (J1), RCA
output plugs (J9), DIN input plug (J5), AC
plug (J6) and the woofer output cable (J3)
(ZONE 1 only). Don't remove the interconnect cable between the equalizer PCB and
the amplifier assembly. Remove the entire
amplifier module (1, 2).
4. Amplifier/EQ Module Replacement
4.1 Align the amplifier assembly so that the
two posts on the rear panel line up with the
two grommets on the amplifier assembly.
Press firmly down on the amplifier assembly so that the two posts are fully inserted
into the two grommets.
4.2 Align the adaptor bracket with the screw
holes in the rear panel. See Figure 2 for the
correct position.
4.3 Connect all the connectors that were
removed in procedure 3.4.
4.4 Replace the four screws (11) that
secure the adaptor bracket to the rear
panel.
5. Fuse Access/EQ PCB Removal
5.1 Perform procedure 1.
5.2 Remove the screw (14) that secures
the equalizer PCB to the bracket adaptor.
5.3 Press outward on the four tabs that
secure the equalizer PCB to the bracket
adaptor. Lift off the equalizer PCB. The
fuse is located on the under side of the
equalizer PCB.
6. EQ PCB Replacement
6.1 Line up the slots on the equalizer PCB
with the tabs on the adaptor bracket.
6.2 Replace the screw (14) that secures the
equalizer PCB to the adaptor bracket.
7. I/O PCB Removal
7.1 Perform procedure 1.
7.2 Remove the four screws (12) that
secure the I/O PCB to the rear panel.
7.3 Remove all the connectors from the I/O
PCB. Make a note of the wire configuration.
Lift up the I/O PCB.
3
JUKEBOX DISASSEMBLY/ASSEMBLY PROCEDURES
Note: Some units have the antenna cable
soldered to the I/O PCB.
8. I/O PCB Replacement
8.1 Align the I/O PCB so that the holes in the
I/O PCB align with the locator pins on the
rear panel. Press down on the I/O PCB until
the locator pins are fully inserted through the
holes in the I/O PCB.
8.2 Replace the four screws (12) that secure
the I/O PCB to the rear panel.
8.3 Connect all the connectors that were
removed in procedure 5.3.
Note: The modem plug that connects to the
computer connects to J9. Solder the antenna cable to the I/O PCB if it was initially
soldered.
9. Transformer Removal
11.2 Lift the 141JB out of the Jukebox and
remove the wires from the rear of the
enclosure.
12. 141JB Replacement
12.1 Attach the wires to the rear of the
141JB (6).
12.2 Line up the inserts in the 141JB with
the screw holes in the Jukebox.
12.3 Replace the two wing nuts that secure
the 141JB to the Jukebox.
13. Woofer Removal
13.1 Perform Procedure 1.1.
13.2 Remove the 10 screws (10) that
secure the woofer access panel to the
Jukebox. Pull off the access panel.
9.1 Cut the wire ties that secure the transformer wire harness.
9.2 Disconnect the primary (J7) and secondary (J1) connectors from the amplifier
module (1, 2).
9.3 Remove the four nuts (13) that secure
the transformer to the rear panel. Lift the
transformer up (4).
10. Transformer Replacement
10.1 Align the transformer with the screw
posts on the rear panel.
10.2 Replace the four nuts (13) that secure
the transformer to the rear panel.
10.3 Connect the primary (J7) and secondary (J1) connectors to the amplifier module
(1, 2). Replace the wire ties that were
removed in procedure 7.1.
®
11. Detachable 141
JB Removal
13.3 Remove the four screws (9) that
secure the woofer (8) to the Jukebox.
13.4 Lift the woofer out of the Jukebox and
cut the wires as close as possible to the
woofer. Make a note of the wire configuration.
14. Woofer Replacement
14.1 Attach the wires to the replacement
woofer (8) referring to the wire configuration notes taken in procedure 11.4 and
figure 3.
14.2 Align the woofer to the Jukebox and
twist any excess wire to prevent wire
buzzes.
14.3 Replace the four screws (9) that
secure the woofer to the Jukebox.
14.4 Align the woofer access panel to the
Jukebox and replace the 10 screws (10)
that secure it to the Jukebox.
11.1 Remove the two wing nuts located on
the side of the 141JB (6).
4
JUKEBOX REMOTE CONTROL
DISASSEMBLY/ASSEMBLY PROCEDURES
1. Enclosure Disassembly
1.1 Slide off the battery compartment door
(5) and remove the batteries.
1.2 While holding the top cover (4) with one
hand, place your fingers of your other hand
in the battery compartment and grasp the
lower part of the bottom cover (3) with your
fingers.
1.3 With your fingertips in the battery compartment, first pull parallel to the unit and
then pull perpendicular.
1.4 With the catches released at the bottom,
work your fingers up the sides to release
the rest of the catches.
2. Enclosure Assembly
2.1 Lower the bottom cover (3) onto the top
cover (4) so that the bottom cover's lip fits
over the top cover.
2.2 Press the top cover and the bottom
cover together until they snap into place.
3. PCB Removal
3.1 Lift the PCB (1) straight up. The springs
will come up with the PCB.
4. PCB Replacement
4.1 Lower the PCB (1) into the top cover (4)
so that the springs are in the battery compartment.
5. Pad Removal
5.1 The pad (2) is not secured. Grasp a
corner of the pad and lift it out.
6. Pad Replacement
6.1 Lower the pad (2) into the top cover (4)
so that the buttons line up with the holes in
the top cover.
5
6
7
9
8
B
B
3
12
1
2
4
10
SECTION B-B
Figure 1. Remote Control Assembly Exploded View
5
TEST PROCEDURES
Note: The following tests are intended to
be used by a qualified electronic technician
to service an amplifier module. These
procedures are not intended to be used in
the field.
ZONE 1 Bass Channel Test Procedures
Note: Use the AM-5
number 172296, to connect the test equipment to the input (J5) of the amplifier. Disconnect the speakers from the amplifier outputs
and do not load the outputs unless otherwise
noted.
Unit Turn On Procedure
Apply 12 VDC to J5 pin1 (refer to the
schematic). This will simulate the turn-on
signal the amplifier receives from the
computer.
1. Bass Channel DC Offset
®
P audio input cable, part
4.2 Reference a dB meter to the woofer
channel output.
4.3 Measure the woofer output according to
the following table.
Frequency Output Tolerance
20 Hz -21.3 dB ± 2.0 dB
40 Hz +3.0 dB ± 1.5 dB
100 Hz Reference 200 Hz -24.5 dB ± 2.0 dB
5. Bass Channel Dynamic Equalizer Gain
5.1 Apply a 2.4 mVrms, 50 Hz signal to the
left and right input.
5.2 Reference a dB meter to the bass
channel output.
5.3 Apply a 240 mVrms, 50 Hz signal to the
left and right input.
1.1 Disconnect all audio input signals.
1.2 Measure the woofer channel output. It
should be 0 ± 70 mVDC.
2. Bass Channel Output Noise
2.1 Short all audio inputs.
2.2 Measure the woofer channel output. It
should be <10 mVrms.
3. Bass Channel Reference Gain
3.1 Apply a 200 mVrms, 100 Hz signal to
the left and right input.
3.2 Reference a dB meter to the applied
signal.
3.2 Measure the bass channel output. It
should be 28.3 dB ± 1.5 dB.
5.4 Measure the bass channel output. It
should be 26.3 dB ± 1.5 dB (referenced to
the measurement taken in 5.2).
6. Bass Channel Small Signal Distortion at
0.5 W (1.414 Vrms)
6.1 Connect the speaker or a 6 Ω, 1%,
100 W resistive load to the bass channel
output.
6.2 Apply a 54 mVrms, 100 Hz signal to the
left and right input.
6.3 Measure the distortion at the bass
channel output. It should be <0.5% THD.
7. Bass Channel Large Signal Distortion at
80 W (17.9 Vrms)
7.1 Connect the speaker or a 6 Ω, 1%,
resistive load to the bass channel output.
4. Bass Channel Relative Frequency
Response
4.1 Apply a 200 mVrms, 100 Hz signal to
the left and right input.
7.2 Apply a 685 mVrms, 100 Hz signal to
the left and right input.
7.3 Measure the distortion at the bass
channel output. It should be <0.2% THD.
6
TEST PROCEDURES
8. Bass Control Test
8.1 Apply a 50 mVrms, 100 Hz signal to the
left and right input.
8.2 Adjust R302 to center. Reference a dB
meter to the bass channel output.
8.3 Adjust R302 to maximum. Measure the
bass channel output. It should be +2.5 dB ±
1.5 dB.
8.4 Adjust R302 to minimum. Measure the
bass channel output. It should be -2.8 dB ±
1.5 dB.
9. Bass Compressor Test
9.1 Apply a 1.4 mV rms, 100 Hz signal to
the left and right input.
9.2 Measure the distortion at the bass
channel output. It should be <10% THD.
ZONE 1 and 2 Left/Right Channel Tests
Note: Unload the amplifier outputs unless
otherwise noted.
Unit Turn On Procedure
Apply 12 VDC to J5 pin1. This will simulate
the turn on signal the amplifier receives
from the computer.
12. Left/Right Reference Gain
12.1 Apply a 200 mVrms, 1.0 kHz signal to
the left/right input.
12.2 Measure the left/right channel output.
It should be (19.2 dB ± 1.5 dB, ZONE 1)
(34.0 dB ± 1.5 dB, ZONE 2).
13. ZONE 1 Left/Right Channel Relative
Frequency Response
13.1 Apply a 200 mVrms, 1.0 kHz signal to
the left/right channel output.
13.2 Reference a dB meter to the left/right
channel output.
13.3 Measure the left/right channel output
according to the following table.
Frequency Output Tolerance
100 Hz -1.8 dB ± 2.5 dB
170 Hz +6.4 dB ± 1.0 dB
600 Hz +2.5 dB ± 1.0 dB
1 kHz Reference -
1.4 kHz +0.6 dB ± 1.0 dB
6.0 kHz +10.5 dB ± 1.0 dB
12 kHz +14.2 dB ± 1.5 dB
20 kHz +6.6 dB ± 3.0 dB
14. ZONE 2 Left/Right Channel Relative
Frequency Response
10. Left/Right DC Offset
10.1 Disconnect all audio input signals.
10.2 Measure the left/right channel output.
It should be 0 ± 70 mV.
11. Left/Right Output Noise
11.1 Disconnect all audio input signals.
11.2 Measure the left/right channel output.
It should be ≤500 µV un-weighted.
14.1 Apply a 50 mVrms, 1 kHz signal to left/
right channel input.
14.2 Reference a dB meter to the left/right
channel output.
14.3 Measure the left/right channel output
according to the following table.
Frequency Output
20 Hz -0.6 ± 1.0 dB
20 kHz -0.6 ± 1.0 dB
7
TEST PROCEDURES
15. Left/Right Channel Small Signal Distortion at (0.1 W, 632 mVrms ZONE 1) (0.5
W, 1.4 Vrms ZONE 2)
15.1 Connect a 4 Ω, 1%, 50 W resistive
load to the left/right channel output.
15.2 Apply a (25 mVrms ZONE 1) (28
mVrms ZONE 2), (4 kHz ZONE 1) (9 kHz
ZONE 2) signal to the left/right input.
15.3 Measure the distortion at the left/right
channel output. It should be <0.2% THD.
16. Left/Right Channel Large Signal Distortion at (30 W, 15.5 Vrms ZONE 1) (30 W,
11.0 Vrms ZONE 2)
16.1 Connect a 4 Ω, 1%, 50 W resistive
load to the left/right channel output.
16.2 Apply a (1.7 Vrms ZONE 1) (220
mVrms ZONE 2), 1 kHz signal to the left/
right input.
19. Short Circuit Protection Test
19.1 Apply a (1 Vrms ZONE 1) (0.35
mVrms ZONE 2), 1 kHz signal to the left/
right channel input.
19.2 Momentarily short the left channel.
19.3 Verify that the mute line (J2 pin 5)
goes low (<0.2 V). Wait three seconds and
repeat for the right channel.
16.3 Measure the distortion at the left/right
channel output. It should be <0.2% THD.
17. Left/Right Channel Separation
17.1 Apply a 100 mVrms, 10 kHz signal to
the right (left) channel only. Short the left
(right) channel input.
17.2 Reference a dB meter to the right (left)
channel.
17.3 Measure the left (right) channel output. It should be <-30 dB.
18. Compressor Test
18.1 Apply a (1.9 Vrms ZONE 1) (0.70
Vrms ZONE 2), 1 kHz, signal to the left and
right channel input.
18.2 Measure the distortion at the left and
right output. It should be <6.0%
8
PART LIST NOTES
AMP ASSY, ZONE 1, 115V PART NUMBER 199018-9014 USES PCB ASSY 195225
AMP ASSY, ZONE 2, 115V PART NUMBER 199019-9014 USES PCB ASSY 195178
1. This part is not normally available from customer service. Approval from the Field Service
Manager is required before ordering.
2. The individual parts located on the PCB are listed in the part list.
3. This part is critical for safety purposes. Failure to use a substitute replacement with
the same safety characteristics as the recommended replacement part might create shock, fire
and/or other hazards.
MAIN PART LIST
Item
Number
1 AMP ASSY, ZONE 1, 115VAC 199018-9014
2 AMP ASSY, ZONE 2, 115VAC 199019-9014
3 PCB ASSY, I/O 250636-9014
4 TRANSFORMER, 120V 196196 3
5 FAN, 115VAC 196882 3
6
7 WOOFER 190170
- FILTER, FAN 196829-001
- REMOTE CONTROL 199640-9014
®
141
JB, PAIR, DETACHABLE
Description Part Number Note
250637-9014
9
Fixed
Fixed
Detachable
6
Top Panel
Latch (x2)
Rear Panel
Release Handle
10
9
View without Front Drawer
8
6
Detachable
Front
Drawer
Front
Drawer
Lock
UPS
Computer
Rear Panel
Release Bar
Retaining Pin
AMP
Rear Panel
Assembly
red
black
Figure 2. Jukebox Assembly
+
+
yellow
grey
green
grey
+
+
Figure 3. Woofer Wiring Diagram
10
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