Harman JBL Performance Series User manual

Service Manual
VMA-160/1120/1240/260/2120
Commercial Series
1 Channel & 2 Channel Mixer-Amplifier
Version A - 09/20
1

Safety Compliance
Datasheets and Specification
Front Panel
Rear Panel
Troubleshooting
Block Diagrams
PCB Boards
Schematics
Exploded View
Bill of Materials
Table of Contents
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
2

IMPORTANT SAFETY INFORMATION
WARNING FOR YOUR PROTECTION
READ THESE INSTRUCTIONS:
KEEP THESE INSTRUCTIONS
HEED ALL WARNINGS
FOLLOW ALL INSTRUCTIONS
THE APPARATUS SHALL NOT BE EXPOSED TO DRIPPING OR
SPLASHING LIQUID AND NO OBJECT FILLED WITH LIQUID, SUCH
AS VASES, SHALL BE PLACED ON THE APPARATUS
CLEAN ONLY WITH A DRY CLOTH.
DO NOT BLOCK ANY OF THE VENTILATION OPENINGS. INSTALL IN
ACCORDANCE WITH THE MANUFACTURER’S INSTRUCTIONS.
DO NOT INSTALL NEAR ANY HEAT SOURCES SUCH AS
RADIATORS, HEAT REGISTERS, STOVES, OR OTHER APPARATUS
(INCLUDING AMPLIFIERS) THAT PRODUCE HEAT.
ONLY USE ATTACHMENTS/ACCESSORIES SPECIFIED BY THE
MANUFACTURER.
UNPLUG THIS APPARATUS DURING LIGHTNING STORMS OR WHEN
UNUSED FOR LONG PERIODS OF TIME.
Do not defeat the safety purpose of the polarized or grounding-type
plug. A polarized plug has two blades with one wider than the
other. A grounding type plug has two blades and a third grounding
prong. The wide blade or third prong are provided for your safety. If
the provided plug does not fit your outlet, consult an electrician for
replacement of the obsolete outlet.
Protect the power cord from being walked on or pinched particularly
at plugs, convenience receptacles, and the point where they exit from
the apparatus.
Use only with the cart stand, tripod bracket, or table specified by
the manufacture, or sold with the apparatus. When a cart is used,
use caution when moving the cart/apparatus combination to avoid
injury from tip-over. Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been damaged in any
way, such as power-supply cord or plug is damaged, liquid has been
spilled or objects have fallen into the apparatus, the apparatus has
been exposed to rain or moisture, does not operate normally, or has
been dropped.
POWER ON/OFF SWITCH: For products provided with a power
switch, the power switch DOES NOT break the connection from the
mains.
MAINS DISCONNECT: The plug shall remain readily operable. For
rack-mount or installation where plug is not accessible, an all-pole
mains switch with a contact separation of at least 3 mm in each
pole shall be incorporated into the electrical installation of the rack
or building.
FOR UNITS EQUIPPED WITH EXTERNALLY ACCESSIBLE FUSE
RECEPTACLE: Replace fuse with same type and rating only.
MULTIPLE-INPUT VOLTAGE: This equipment may require the use
of a different line cord, attachment plug, or both, depending on the
available power source at installation. Connect this equipment only to
the power source indicated on the equipment rear panel. To reduce
the risk of fire or electric shock, refer servicing to qualified service
personnel or equivalent.
If connected to 240V supply, a suitable CSA/UL certified power cord shall
be used for this supply.
SAFETY INSTRUCTIONS
NOTICE FOR CUSTOMERS IF YOUR UNIT IS EQUIPPED WITH A POWER
CORD.
WARNING: THIS APPLIANCE SHALL BE CONNECTED TO A MAINS SOCKET
OUTLET WITH A PROTECTIVE EARTHING CONNECTION.
The cores in the mains lead are colored in accordance with the following code:
GREEN and YELLOW - Earth BLUE - Neutral BROWN - Live
As colors of the cores in the mains lead of this appliance may not cor-
respond with the colored markings identifying the terminals in your plug,
proceed as follows:
•The core which is colored green and yellow must be connected to the
terminal in the plug marked with the letter E, or with the earth symbol,
or colored green, or green and yellow.
•The core which is colored blue must be connected to the terminal
marked N or colored black.
•The core which is colored brown must be connected to the terminal
marked L or colored red.
This equipment may require the use of a different line cord, attachment
plug, or both, depending on the available power source at installation. If
the attachment plug needs to be changed, refer servicing to qualified ser-
vice personnel who should refer to the table below. The green/yellow wire
shall be connected directly to the units chassis.
CONDUCTOR WIRE COLOR
Normal Alt
L LIVE BROWN BLACK
N NEUTRAL BLUE WHITE
E EARTH GND GREEN/YEL GREEN
WARNING: If the ground is defeated, certain fault conditions in the unit or in
the system to which it is connected can result in full line voltage between
chassis and earth ground. Severe injury or death can then result if the
chassis and earth ground are touched simultaneously.
The symbols shown above are internationally accepted symbols
that warn of potential hazards with electrical products. The light-
ning flash with arrow point in an equilateral triangle means that
there are dangerous voltages present within the unit. The exclama-
tion point in an equilateral triangle indicates that it is necessary for
the user to refer to the owner’s manual.
These symbols warn that there are no user serviceable parts inside
the unit. Do not open the unit. Do not attempt to service the unit
yourself. Refer all servicing to qualified personnel. Opening the
chassis for any reason will void the manufacturer’s warranty. Do not
get the unit wet. If liquid is spilled on the unit, shut it off immediately
and take it to a dealer for service. Disconnect the unit during
storms to prevent damage.
WARNING
RISK OF ELETRIC SHOCK
DO NOT OPEN
AVERTISSEMENT: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR
WARNING: TO THE REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
3
Table of Contents

IMPORTANT SAFETY INFORMATION
ELECTROMAGNETIC
COMPATIBILITY
This device complies with part 15 of the FCC Rules and the Product speci-
fications noted on the Declaration of Conformity. Operation is subject to the
following two conditions:
•This device may not cause harmful
interference, and
•This device must accept any interference received, including interfer-
ence that may cause undesired operation.
Operation of this unit within significant
electromagnetic fields should be avoided.
•Use only shielded interconnecting cables.
U.K. MAINS PLUG WARNING
A molded mains plug that has been cut off from the cord is unsafe.
Discard the mains plug at a suitable disposal facility. NEVER UNDER ANY
CIRCUMSTANCES SHOULD YOU INSERT A DAMAGED OR CUT MAINS PLUG
INTO A 13 AMP POWER SOCKET. Do not use the mains plug without the
fuse cover in place. Replacement fuse covers can be obtained from your
local retailer. Replacement fuses are 13 amps and MUST be ASTA approved
to BS1362.
FEDERAL COMMUNICATION
COMMISSION INTERFERENCE STATEMENT
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
FCC CAUTION
Any changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate this equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that
may cause undesired operation.
IMPORTANT NOTE
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This transmitter module must not be colocated or operated
in conjunction with any other antenna or transmitter. This End equipment should be
installed and operated with a minimum distance of 20 centimeters between the radiator
and your body.
CANADA STATEMENT
This device complies with Industry Canada’s licence-exempt RSSs. Operation is subject
to the following two conditions:
1. This device may not cause interference; and
2. This device must accept any interference, including interference that may cause
undesired operation of the device.
This device complies with Industry Canada’s licence-exempt RSSs. Operation is subject
to the following two conditions:
1. l’appareil ne doit pas produire de brouillage;
2. l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique subi,même
si le brouillage est susceptible d’en compromettre le fonctionnement.
CAUTION EXPOSURE
This device meets the exemption from the routine evaluation limits in section 2.5 of
RSS102 and users can obtain Canadian information on RF exposure and compliance.
Le dispositif répond à l’exemption des limites d’évaluation de routine dans la section
2.5 de RSS102 et les utilisateurs peuvent obtenir des renseignements canadiens sur
l’exposition aux RF et le respect.
THE FINAL END PRODUCT MUST BE LABELLED IN
A VISIBLE AREA WITH THE FOLLOWING
The Industry Canada certification label of a module shall be clearly visible at all times
when installed in the host device, otherwise the host device must be labelled to display
the Industry Canada certification number of the module, preceded by the words
“Contains transmitter module”, or the word “Contains”, or similar wording expressing
the same meaning, as follows: “Contains transmitter module IC: 6132A-MB8811VMA”
This End equipment should be installed and operated with a minimum distance of 20
centimeters between the radiator and your body.
Cet équipement devrait être installé et actionné avec une distance minimum de 20
centimètres entre le radiateur et votre corps.
The end user manual shall include all required regulatory information/warning as shown
in this manual.
If you want to dispose this product, do not mix it with
general household waste. There is a separate collection
system for used electronic products in accordance with
legislation that requires proper treatment, recovery
and recycling.
Private household in the 25 member states of the EU, in Switzerland
and Norway may return their used electronic products free of charge
to designated collection facilities or to a retailer (if you purchase a
similar new one).
For Countries not mentioned above, please contact your local authori-
ties for a correct method of disposal.
By doing so you will ensure that your disposed product undergoes
the necessary treatment, recovery and recycling and thus prevent
potential negative effects on the environment and human health.
MAGNETIC FIELD
CAUTION! Do not locate sensitive high-gain equipment such as
preamplifiers or tape decks directly above or below the unit. Because this
amplifier has a high power density, it has a strong magnetic field which
can induce hum into unshielded devices that are located nearby. The field
is strongest just above and below the unit.
If an equipment rack is used, we recommend locating the amplifier(s)
in the bottom of the rack and the preamplifier or other sensitive equip-
ment at the top.
USE GROUNDED OUTLET ONLY!
Apparatet må tilkoples jordet stikkontakt
Apparaten skall anslutas till jordat uttag
Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
4
Table of Contents

EC - DECLARATION OF CONFORMITY
Brand: JBL
Equipment Type: Commercial Mixer-Amplifiers
Model names: VMA160, VMA1120, VMA1240, VMA260, VMA2120
We, Harman International, declare under our sole responsibility that the product, to which this declaration relates, is in
conformity with the following standards.
Due to line current harmonics, we recommend that you contact your supply authority before connection.
We certify that the product identified above conforms to the requirements of the EMC Council Directive 89/336/EEC as amended
by 92/31/EEC, and the Low Voltage Directive 73/23/EC as amended by 93/68/EEC.
Report No. Description
EN 55103-1:2009
+A1:2012
EMC Compatibility – Product Family Standard for Audio, Video, Audio-Visual and
Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions
EN 55103-1:2009
+A1:2012
Field Emissions – Annex A @ 10cm and 20cm
EN 61000-3-2:2014 Limits for Harmonic Current Emissions (equipment input current less than or equal to 16A)
EN 61000-3-3:2013 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply systems Rated Current
less than or equal to 16A
EN 55022:2010 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated
& Conducted, Class B Limits
EN 55103-2:2009 EMC Compatibility – Product Family Standard for Audio, Video, Audio-Visual and
Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity
EN 61000-4-2:2009 Ed 9 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air
Discharge)
EN 61000-4-3:2010
Ed 3.2
Radiated, Radio-Frequency, EMC Immunity (Environment E2, Criteria A)
EN 61000-4-4:2012
Ed 12
Electrical Fast Transient/Burst Immunity (Criteria B)
EN 61000-4-5:2014 Surge Immunity (Criteria B)
EN 61000-4-6:2014 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A)
EN 61000-4-11:2004 Voltage Dips, Short Interruptions and Voltage Variation
Safety Standard:
IEC 60065:2014 Ed8
EN 60065:2014
Safety Requirements – Audio, Video, and Similar Electronic Apparatus
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
5
Table of Contents

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Performance VMA160 VMA1120 VMA1240 VMA260 VMA2120
Max Output Power per Channel
into 4 Ωor 8 ΩL)[≤0.5% THD 60W 120W 240W 60W 120W
Insertion Loss
(70V & 100V outputs) 1 dB maximum
Number of Input Channels 55588
Number of Output Channels 11122
Tone Controls
(Bass and Treble non-detented
potentiometers on each channel)
Bass +/-14dB @ 50Hz
Treble +/-14dB @ 10kHz
Input Sensitivity
(to obtain full rated power into 8
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Mic Input: 5.5mVRMS
Line Input: 1.3VRMS
RCA Input (stereo in): 130mVRMS
Frequency Response
(measured at 2.83VRMS into rated
load impedance at any output)
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70V/100V Outputs: 80Hz - 15kHz +/-3dB
Total Harmonic Distortion (THD)
(measured at 2.83VRMS into rated
load impedance at any output)
Power Amp Output: <0.5%, 20Hz - 20kHz
Signal-to-Noise Ratio
(Ref. Rated Power, mixer levels
@ min., master volume @ max.
A-weighted)
>76dB
Input Impedance
(nominal)
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Phantom Power 27VDC
Crosstalk
(reference rated power, volume at
mid position, 1kHz)
-70 dB
Nominal AC Line Voltages 100V, 120V, 220V, 220-240V, 50/60 Hz
Minimum Load Impedance
Low Impedance Output
70V Output
100V Output
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Operating Temperature/
Humidity 0°C to 35°C @ 95% R.H. (non-condensing)
Storage Temperature -20°C to 85°C
Dimensions & Weight
Net Weight 19.4 lb
(8.8 kg)
20.2 lb
(9.2 kg)
25.5 lb
(11.6 kg)
25.5 lb
(11.6 kg)
29.3 lb
(13.3 kg)
Dimensions Width: 17.0 in. (432 mm)
Depth: 16.3 in. (415 mm)
Height: 3.5 in. (88 mm)
Shipping Weight 24.6 lb
(11.2 kg)
25.5 lb
(11.6 kg)
30.8 lb
(14 kg)
30.8 lb
(14 kg)
34.5 lb
(15.7 kg)
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
6
Table of Contents

1.2 Front Panel Controls & Indicators
Figure 1.2.1 Front Panel, 1 Channel Model
1USB
VMA 160
1 2 3 4 MUSIC
MASTER
H
A B
F G I J
C D
E
A. Input Level Controls
B. Media Player Display
C. Output Volume Control(s) Including an Illuminated ring around the output volume
control will light green with signal presence while red indicates clipping, i.e. the
signal has reached the threshold of audible distortion
D. Power Switch
E. Power on LED illuminates blue when power is switched on.
F. Input 1 - Front panel audio input capability via 1/4” TRS connector. The two
channel model includes a second, similar input (Input 4).
G. Media Player Controls
H. Tone Controls - Bass and Treble potentiometers for each output channel.
I. USB Audio Input
J. Bluetooth Key and Indicator
H
A B
FI J
G
C D
E
1USB
VMA 260
4
1 2 3 MUSIC 1 4 5 6 MUSIC 2
MASTER 2MASTER 1
Figure 1.2.2 Front Panel, 2 Channel Model
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
7
Table of Contents

1.3 Rear Panel Controls & Connectors (VMA160, VMA1120, VMA1240)
100V ~
120V ~
220V-240V ~
50/60Hz 225W
OUTPUTS
100V 70V COM
CLASS 2 OUTPUT WIRING PERMITTED
REMOTE
(CSR-V)
VOX
INPUT1
FRONT
PANEL
MUSICINPUT2 INPUT3
INPUT4
MONO
SUM
MONO
SUM
OFF OFF
LINE LINE
OFF
LINE LINE
OFF
1-70V/100V Output 2-Chime 3-Input 1 Line/Mic 4-Input 2 Line/Mic 5-Input 2 Phantom 6-Input 3 Line/Mic 7-Input 4 Line/Mic 8-Input 4 Phantom
PRIORITY
(Input 2)
ON ON MIC MIC ON MIC MIC ON
MADE IN CHINA
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING - TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
AVERTISSEMENT - RISQUE DE CHOC ÉLECTRIQUE - NE PAS OUVRIR.
AVERTISSEMENT - ÉNERGIE ÉLECTRIQUE DANGEREUSE VOIR LA NOTICE DE FONCTIONNEMENT.
VMA 1240
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING CONDITIONS:
1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE
UNDESIRED OPERATION.
CONTAINS FCC ID: API-MB8811VMA
CONTAINS IC: 6132A-MB8811VMA
CMIIT ID: 2016DJ2941
HARMAN INTERNATIONAL
1718 W. Mishawaka Rd.,
Elkhart, IN 46517
Apparatet må tilkoples jordet stikkontakt
Apparaten skall anslutas till jordat uttag
Laite on liitettävä suojakoskettimilla
varustettuun pistorasiaan
CONFORMS TO
UL STD .60065
CERTIFIED TO CSA STD.
C22.2 NO .60065
ATTENTION - POUR RÉDUIRE LE
RISQUE DE CHOCK ÉLECTRIQUE, LA
FICHE CENTRALE DE LA PRISE DOIT
ÊTRE BRANCHÉE POUR MAINTENIR
LA MISE À LA TERRE.
CAUTION - TO REDUCE THE RISK OF
ELECTRIC SHOCK, GROUNDING OF
THE CENTER PIN OF THE PLUG MUST
BE MAINTAINED.
CAN-ICES-3(B)/NMB-3(B)
CD E A B
FG H I
Figure 1.3.1 Rear Panel - VMA 1240
A. "NQMJmFSPVUQVUDPOOFDUPST
B. Remote volume connectors – RJ-45 style connector to connect to JBL CSR-V
control module.
C. VOX sensitivity adjustment for Input 1.
D. Input 4 may use either Euroblock or RCA style connector.
E. AC Power Inlet – Detachable IEC.
F. $POmHVSBUJPOTXJUDIFTDPOUSPMNJDMJOFHBJOTFUUJOHTBOEQIBOUPNQPXFSGPSUIF
inputs as well as enable the chime and 70V/100V output mode.
G. Input 2 – Euroblock connector provides for audio input and priority contacts that
will duck other channels during an announcement when contacts closed using a
switch.
H. Input 3 accepts a 1/4” TRS connector.
I. Music input uses a Dual RCA Connector. Stereo, unbalanced sources will be
summed together.
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
8
Table of Contents

1.4 Rear Panel Controls & Connectors (VMA260 & VMA2120)
CH1
CH2
CLASS 2 OUTPUT WIRING PERMITTED
OUTPUTS REMOTE (CSR-V)
CH1 CH2
100V 70V COM 1-Input 1 to CH2
2-Input 2 to CH2
3-Input 3 to CH2
4-Music 1 to CH2
5-BT/USB to CH2
6-Input 4 to CH1
7-Input 5 to CH1
8-Input 6 to CH1
9-Music 2 to CH1
10-Not Used
1-70V/100V Output
2-Chime
3-Input 1 Line/Mic
4-Input 2 Line/Mic
5-Input 2 Phantom
6-Input 3 Line/Mic
7-Input 3 Phantom
8-Not Used
Signal Routing
1-70V/100V Output
2-Chime
3-Input 4 Line/Mic
4-Input 5 Line/Mic
5-Input 5 Phantom
6-Input 6 Line/Mic
7-Input 6 Phantom
8-Not Used
CH1 Settings
CH2 Settings
OFF
OFF
LINE
LINE
OFF
LINE
OFF
NC
OFF
OFF
LINE
LINE
OFF
LINE
OFF
NC
ON
ON
MIC
MIC
ON
MIC
ON
NC
ON
ON
MIC
MIC
ON
MIC
ON
NC
OFF ON
CH1 VOX
(Input 2)
CH2 VOX
(Input 5)
MONO
SUM
MONO
SUM
MONO
SUM
MONO
SUM
MUSIC1 MUSIC2
INPUT2 INPUT3 INPUT5 INPUT6
INPUT1
FRONT
PANEL
INPUT4
FRONT
PANEL
PRIORITY
100V ~
120V ~
220V-240V ~
50/60Hz 175W
WARNING - TO REDUCE
THE RISK OF FIRE OR
ELECTRICAL SHOCK, DO NOT
EXPOSE THIS EQUIPMENT TO
RAIN OR MOISTURE.
AVERTISSEMENT -
RISQUE DE CHOC
ÉLECTRIQUE - NE PAS
OUVRIR.
AVERTISSEMENT -
ÉNERGIE ÉLECTRIQUE
DANGEREUSE VOIR LA
NOTICE DE
FONCTIONNEMENT.
PRIORITY
MADE IN CHINA
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
VMA 260
CONFORMS TO
UL STD .60065
CERTIFIED TO CSA STD.
C22.2 NO .60065
Apparatet må tilkoples jordet stikkontakt
Apparaten skall anslutas till jordat uttag
Laite on liitettävä suojakoskettimilla
varustettuun pistorasiaan
CONTAINS FCC ID: API-MB8811VMA
CONTAINS IC: 6132A-MB8811VMA
CMIIT ID: 2016DJ2940
HARMAN INTERNATIONAL
1718 W. Mishawaka Rd.,
Elkhart, IN 46517
ATTENTION - POUR RÉDUIRE LE
RISQUE DE CHOCK ÉLECTRIQUE, LA
FICHE CENTRALE DE LA PRISE DOIT
ÊTRE BRANCHÉE POUR MAINTENIR
LA MISE À LA TERRE.
CAUTION - TO REDUCE THE RISK OF
ELECTRIC SHOCK, GROUNDING OF
THE CENTER PIN OF THE PLUG MUST
BE MAINTAINED.
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION
IS SUBJECT TO THE FOLLOWING CONDITIONS:
1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED,
INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
CAN-ICES-3(B)/NMB-3(B)
C D F HG
E
A B
I K L
JM N
Figure 1.4.1 Rear Panel - VMA 260
A. "NQMJmFSPVUQVUDPOOFDUPST
B. Remote volume connectors – RJ-45 style connector to connect to JBL CSR-V
control modules.
C. Input 2 – Input audio through either the Euroblock connector or the 1/4” TRS
connector. Pins 4 and 5 of the Euroblock are priority contacts that will duck other
channels during an announcement when the contacts are closed using a switch.
D. Input 3 accepts input through either the 3-pin Euroblock or the Dual RCA jacks.
Stereo, unbalanced sources will be summed into a mono signal.
E. Music1 input uses a Dual RCA Connector. Stereo, unbalanced sources will be
summed together.
F. Input 5 – Input audio through either the Euroblock connector or the 1/4” TRS
connector. Pins 4 and 5 of the Euroblock are priority contacts that will duck other
channels during an announcement when the contacts are closed using a switch.
G. Input 6 accepts input through either the 3-pin Euroblock or the Dual RCA jacks.
Stereo, unbalanced sources will be summed together.
H. Music2 input uses a Dual RCA Connector. Stereo, unbalanced sources will be
summed together.
I. Signal Routing DIP switch is used to route inputs to both output channels. By
default, each group of inputs is routed only to its respective output channel (Input
1 – Music1 are routed to output CH1, Input 4 – Music2 are routed to output CH2).
J. VOX sensitivity adjustment for Input 1.
K. CH1 Settings DIP switch is used to enable the 70V/100V output option, turn on
the chime feature, select input gain, and enable phantom power for CH1.
L. VOX sensitivity adjustment for Input 4.
M. CH2 Settings DIP switch is used to enable the 70V/100V output option, turn on
the chime feature, select input gain, and enable phantom power for CH2.
N. AC Power Inlet – Detachable IEC.
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
9
Table of Contents

4.0 Troubleshooting
&21',7,211RSRZHUWRWKHPL[HUDPSOLÀHUVRWKDWWKHSRZHU/('LVQRW
illuminated.
1044*#-&3&"40/5IFNJYFSBNQMJmFSJTOPUQMVHHFEJOUPUIFQPXFSPVUMFU
CONDITION: No sound or low sound.
POSSIBLE REASON: The input signal is not present or at a very low level.
POSSIBLE REASON: The Master Volume control is turned down.
POSSIBLE REASON: A CSR-V is connected and turned down.
POSSIBLE REASON: Mixer channel inputs are turned down.
POSSIBLE REASON: A Priority switch is closed, muting all except the priority input.
POSSIBLE REASON: The 70V/100V switch is OFF while using the 70V or 100V
outputs.
CONDITION: Distorted sound.
POSSIBLE REASON: Input signal level is too high. Please turn down the input level
DPOUSPMT/PUFUIBUUIFNJYFSBNQMJmFSTIPVMEOPUCFPQFSBUFEBUBMFWFMUIBUBMMPXT
the clip indicator (red ring around the Master Volume) to be constantly ON.
POSSIBLE REASON: Master Volume is too high.
POSSIBLE REASON: MIC/LINE switch is in MIC position when using a line level
source.
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
10
Table of Contents

27
VMA160, VMA1120 & VMA1240


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Block Diagrams
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
11
Table of Contents

25
VMA260 & VMA2120



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VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
12
Table of Contents

26
VMA260 & VMA2120 Continued
 

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
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
13
Table of Contents

PCB Boards
B3&%$6<90$B&+B)5217B3$1(/ For VMA160/1120/1240
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
14
Table of Contents

B3&%$6<90$B&+B)5217B,1387 For VMA160/1120/1240
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
15
Table of Contents

B3&%$6<90$B&+B5($5B,1387 For VMA160/1120/1240
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
16
Table of Contents

AMP_PCB_VMA160/1120/1240
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
17
Table of Contents

5086659,PCB,ASY,VMA_2CH _FRONT_PANEL For VMA 260/2120
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
18
Table of Contents

5086663,PCB,ASY,VMA_2CH_FRONT_INPUT,PCB For VMA 260/2120
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
19
Table of Contents

5086667,PCB,ASY,VMA_2CH_REAR_INPUT,PCB For VMA 260/2120
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
20
Table of Contents