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ZR500
Power Amplifier
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE
THE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING
TO QUALIFIED PERSONNEL!
EXPLANATION OF
SAFETY SYMBOLS
The exclamation point within an equilateral triangle is intended to alert the user of the presence of
important operating and maintenance (servicing) instructions in the literature accompanying the
appliance.
The lightning flash with the arrowhead symbol within an equilateral triangle is intended to alert the
user to the presence of uninsulated “dangerous voltage” within the products’enclosure that may be
of sufficient magnitude to constitute a risk of electric shock to persons.
IMPORTANT SAFETY INSTRUCTIONS
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Read these instructions.
Keep these instructions.
Heed all warnings.
Follow all instructions.
Do not use this apparatus in or near water.
Clean only with a dry cloth.
Do not block any 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 that produce heat.
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 the third prong is provided for your
safety. If the provided plug does not fit into 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.
Only use attachments/accessories specified by the manufacturer.
Unplug this apparatus during lightning storms or when unused for long periods of time.
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.
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.
TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR BOTTOM COVERS.
NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
FCC COMPLIANCE NOTICE: 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.
CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to
operate the equipment.
NOTE: 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 instruction
manual, 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 or more 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.
IMPORTANT: ZR Series amplifiers require Class 2 output wiring.
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 equipment at the top.
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TABLE OF CONTENTS
SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Magnetic Field Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
FCC Compliance Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Important Paperwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
POWER SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
EXTERNAL CHASSIS DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
EXTERNAL CONTROLS, CONNECTORS, AND STATUS INDICATORS . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
INTERNAL JUMPER SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Input Polarity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Input Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
INSTALLATION AND CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Temperature/Humidity Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
AC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Input Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Balanced and Unbalanced Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Output Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
WARRANTY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
CARE AND SERVICE ASSISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
IN CASE OF DIFFICULTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
INTRODUCTION
Congratulations on choosing the Carver Professional ZR Series
Amplifier! The ZR Series amplifiers not only have superior fidelity
and the capability to drive low impedances, they are among the
most efficient professional power amplifiers on the market. By
utilizing digital power processing (DPP®), our ZR series can
deliver generous power levels, even at 2 Ohm stereo loads. By
design, the ZR Series power amplifiers are very accurate and
efficient. Your ZR Series amplifier should give you many years of
outstanding service and reliability.
UNPACKING
Inside the box you will find; one ZR Series Amplifier, one IECtype power cord, two Euro-style input connectors, four selfadhesive rubber feet, and an owner’s manual and warranty card.
Carefully unpack the amplifier and keep the original carton and
packing materials for future moving, shipment or long-term
storage. After opening the box, please check for visible signs of
damage that were not apparent from the outside of the box. If
you encounter what appears to be concealed damage, please
consult your Carver Professional Dealer before installing unit.
IMPORTANT PAPERWORK
Make sure to save your sales receipt. Your receipt is extremely
important to establish the duration of your Limited Warranty and
for insurance purposes. Next, make a note of the serial number,
which is located on the back of the amplifier. Record it in the
space provided below for convenient reference.
Serial Number: ________________________ Purchased at: ________________________________
Date: _____________
Finally, take a moment to fill out the Warranty Registration Card packed with the amplifier and return it to Carver Professional.
This will allow us to keep you informed about new products as they become available.
POWER SPECIFICATIONS
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95W per channel into 8 ohm stereo loads, 20 Hz to 20 kHz, with less than 0.5% THD+N
150W per channel into 4 ohm stereo loads, 20 Hz to 20 kHz, with less than 0.5% THD+N
250W per channel into 2 ohm stereo loads, 1 kHz, with less than 0.5% THD+N
300W bridged mono into 8 ohms, 20 Hz to 20 kHz with less than 0.5% THD+N
500W bridged mono into 4 ohms, 1 kHz with less than 0.5% THD+N
FEATURES
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High Efficiency Spread Spectrum Switching Amplifier
Stable 2 Ohm Operation
Variable Speed, Ultra-quiet Fan Cooling
4 LED Level Display, Per Channel, Including Signal Present and Clip Indicators
3 LED Status Display: Ready, Protect and Thermal Overload
Standby LED Indicates the Amplifier is in Standby Mode
Level Control Defeat Accessible From Front Panel
Switched 40 Hz/80 Hz (12 dB/Octave Cut) High Pass Filters
Switched Soft Knee Clip Limiters
Soft Start In-Rush Current Limiting
Individual Ground Lifts for Each Channel Input
Terminals for Sequencing Power (On/Off)
Input via Neutrik ® Combo Connectors and Euro-style Connectors
Speaker Outputs via 3 Neutrik® Speakon® Connectors
Power Switch, 3 Positions: ON, OFF, Standby
AC Line Cord (Detachable IEC Type)
DPP® is a registered trademark of Tripath Technology, Inc.
Speakon® is a registered trademark of Neutrik, Inc.
Neutrik® is a registered trademark of Neutrik, Inc.
4
SPECIFICATIONS
PERFORMANCE
THD+N (both channels driven):
IMD (SMPTE):
Dynamic Headroom:
Power Bandwidth:
Frequency Response:
Signal-to-Noise:
Crosstalk:
CMRR:
Slew Rate:
Sensitivity for rated power:
(Variable settings via jumpers)
Input Impedance:
Input Overload:
Protection:
Stability:
Duty Cycle:
<0.5% @ rated power (4 ohm), 20-20kHz, 20kHz BW
<0.15% @ rated power (4 ohm), 1kHz
<0.06% @ -10dB referenced to rated power (4 ohm), 1kHz
<0.2%, 60Hz/7kHz, 4:1, 35Vpeak @ 4 ohms
1.5dB
20-20 kHz @ 4 and 8 ohm loads
20-20kHz, +0dB/-1dB
100dB, A-Weighted, referenced to 4 ohm rated power, 22kHz BW
-70dB @1kHz referenced to rated power (4 ohm)
70dB at 1kHz
7V/Sec
0.316Vrms
0.775Vrms (Factory Preset)
1.23Vrms
2.45Vrms
50k balanced
20dBu
Thermal, Short Circuit, Over-current & Over Voltage, Self-resetting
Unconditionally Stable Into Reactive Loads
Continuous operation at 1/3rd power
POWER REQUIREMENTS:
Mains Voltage:
(output power rated at nominal voltage)
Maximum consumption @ rated power (4 ohm):
1kHz sine wave
100VAC (50-60Hz) ±10%
117VAC (60Hz) ±10%
234VAC (50Hz) ±10%
117VAC (60Hz)
234VAC (50Hz)
440W/4.8Arms
442W/2.4Arms
5
CLIP
0dB
- 6dB
HIGH
PASS
40Hz
80Hz
SIGNAL
0dB
1
2 3
4
PROTECT
READY
HIGH
PASS
CLIP
LIMITER
0dB
THERMAL
5
6
40Hz
80Hz
7
8
9
10 11 12
FRONT
1 & 10 – HIGH PASS FILTER SWITCHES
Separate switches on each channel to enable highpass filters.
Highpass filters cut off the lowest frequencies to eliminate
rumble and prevent excess speaker excursion. The filter is
enabled when the switch is pushed in.
READY: The amplifier is operational.
THERMAL: Whenever the output section and/or the power transformer
exceeds preset thermal limits, the amp is disabled and will resume once it
has cooled.
SIGNAL: Indicates a signal is detected at the input.
2 & 11 – HIGH PASS FILTER STATUS LEDS
Separate indicators on each channel illustrate the highpass filter
status. The LED is dark when the filter is not engaged. A Red
color indicates the cutoff is set at 40Hz, green indicates the
cutoff is set at 80Hz.
3 & 12 – HIGH PASS FILTER CUTOFF
FREQUENCY SELECTOR SWITCHES
Separate switches for each channel select the highpass filter
cutoff frequency. When the switches are out, the cutoff is set at
40Hz. When the switches are in, the cutoff is set at 80Hz.
5 – LEVEL CONTROL DEFEAT
When the switch is in, the level controls are set to 0dB
attenuation no matter what the position of the knobs.
4 & 9 – LEVEL CONTROLS
Sets the amount of signal attenuation, down to a maximum of
–100dB.
6 – SIGNAL LEVEL AND DIAGNOSTIC LEDS
An array of indicators that show the operational status of the
amplifier and the signal level.
PROTECT: Whenever a very low impedance (short circuit) is detected on
either of the outputs, or an over voltage, under voltage or over current
situation is detected the amplifier will protect itself and connected loads by
immediately ceasing to drive the output stage.
– 6dB: Indicates the output has reached a level 6dB below rated power.
0dB: Indicates the amplifier is producing full output (or slightly below,
depending on load impedance).
CLIP: Indicates the output signal is reaching approximately 1% distortion.
7 – CLIP LIMITER SWITCH
When the switch is in the clip limiter is enabled.
8 – CLIP LIMITER STATUS LED
Indicates when the clip limiter is enabled.
13 – STANDBY LED
Indicates that the amp is in Standby mode. When in Standby
mode, the amplifier is turned “OFF”, but the AC Mains are
connected and the amplifier waits for a DC voltage at the
Sequence connector on the rear of the amp. Once a DC voltage
is applied to the Sequence connector, the amp turns “ON” and
begins its start-up diagnostics and upon completion is ready for
use.
14 – POWER SWITCH
A three-position switch used to select the power operation
mode. In the center position, power is off. In the up position,
power is on. In the down position, amp is set to standby mode.
SEQUENCE
FUSE
CH2
MONO
Pin 2+
Pin 1-
Pin 2-
CH2-
MONO+
T
MONO-
BRIDGED
MONO
CH 2
Pin 1+
Pin 1-
CH1+
CH1-
6A-125VAC
CH1
CH2+ Pin 1+
Pin 1+ or 2+
Pin 1- or 2See user’s manual
AC Mains 120V (50-60Hz)
has been removed
15
6
16
17
18
19
STANDBY
13
14
REAR
15 – FUSE CARRIER
Holds the AC mains fuse and has a storage location for a spare
fuse. (not provided)
16 – AC MAINS CONNECTOR
IEC type power cord attaches here.
17 – SEQUENCE CONNECTOR
Used for sequencing power to multiple amps. (See page 9)
18, 19 & 20 – SPEAKER OUTPUTS
A set of three, 4-conductor Neutrik® Speakon®NL4 connectors to
connect the amplifier to the speakers.
22 & 39 – BALANCED AUDIO INPUTS
Euro-type connectors used for balanced or unbalanced signals.
23 & 28 – GROUND LIFT SWITCHES
Separate switches for each channel that disconnects ground pin
of the input connectors from chassis ground. Used to eliminate
ground loop conditions that cause hum. When the switch is in
the ground is lifted.
24 & 27 – GROUND LIFT STATUS LEDS
These are separate indicators for each channel which light up
when the Ground Lift switches are enabled.
19 - BRIDGED MONO uses the output of both channels to create a single
channel with twice the power. The output is provided on both pins 1+/1- and
2+/2- of the Speakon ®, allowing the use of all four conductors to lower the cable
resistance. This output should only be used when the Mono switch is enabled.
25 – MONO SWITCH
When the switch is “in,” the amp is set to Mono mode. Mono
operation causes the signal connected to the channel Two input
to drive both channels. The channel One input is disabled in
Mono mode.
20 - CHANNEL ONE actually provides output for channel one AND channel two
using a single 4-conductor cable. Channel one output is present on pins 1+/1of the Speakon ®, and channel two output is present on pins 2+/2.
26 – MONO STATUS LED
This indicator will light when the Mono switch is engaged.
18 - CHANNEL TWO provides the output of channel two only, on pins 1+/1-.
21 & 30 – BALANCED AUDIO INPUTS
Neutrik® Combo connectors which accept male XLR, TS and
TRS 1/4´´ phone plugs. By default, XLR pin 2 is hot and Tip is
hot. Polarity of the XLR can be reversed with jumper settings
inside the amp. (See page 7)
PUSH
CH 1
PUSH
INPUT
CH 2
INPUT
CH 1
GND
LIFT
20
21
22
23 24
MONO
25 26
GND
LIFT
27 28
29
30
7
INTERNAL JUMPER SETTINGS
NOTE: Resetting any of the jumpers on the input card requires that you remove the top
cover. This operation should be performed by a qualified technician only! Always
disconnect the AC Mains when performing this operation.
To access the internal jumpers, remove the top cover of the amplifier. Locate the input
board as shown below.
INPUT POLARITY
JP101 and JP102 are 6 pin headers that are used to change the
polarity of the balanced input jacks. By default, pin 2 is hot.
Changing both jumpers to the opposite position will make pin 3
hot on that channel. NOTE: Both jumpers on either header
MUST be on the same side.
The illustration below shows how the jumpers are configured to
set either Pin 2 or Pin 3 as the “positive” or “hot” pin on the XLR
connector.
JP101 or JP102 - Input Polarity
XLR Pin 2 Hot
XLR Pin 3 Hot
INPUT SENSITIVITY
JP103 and JP104 are 6 pin headers that are used to adjust the
amplifier’s input sensitivity for a wide variety of source levels.
Each channel can be set to any one of four positions: NOTE:
With no jumper connected, the input sensitivity defaults to
0.775Vrms.
See the illustration below to configure a specific input sensitivity.
The Photo above will show the location of the jumpers on the
input board.
0.316Vrms / -10dBV = Full Output
(Commonly seen in consumer devices with low voltage unbalanced outputs)
0.775Vrms / 0dBu = Full Output
(Most common line-level calibration)
1.23Vrms / +4dBu = Full Output
(Commonly seen in professional audio products with balanced outputs)
2.45Vrms / +10dBu = Full Output
(Devices with large voltage swing, used to drive long line-level paths)
JP103 or JP104 - Sensitivity Adjust
8
0.316V
0.775V
1.23V
2.45V
INSTALLATION & CONNECTIONS
MOUNTING
AC POWER
Before you begin, make sure your amplifier is disconnected from
the power source, with power switch in the “off” position and all
level controls turned completely down (counter-clockwise).
Connect the supplied AC mains cord to the IEC socket on the
rear panel and to the AC mains, appropriate for your amplifier, to
provide power to the amplifier.
Mount in a standard 19-inch (48.3 cm) equipment rack.
INPUT CONFIGURATION (see figure below)
NOTE: When transporting amplifiers in a rack, it is
recommended to use the rear rack supports.
ENSURE PROPER COOLING
Do not block rear or side intake slots or front exhaust vent.
TEMPERATURE & HUMIDITY
CONSIDERATIONS
Normal operation is expected from -20C to +40C ambient at 1/3
rated power into 4 ohms with humidity non-condensing.
ZR series amplifiers can be operated in stereo, dual-mono and
bridged mono. Input connections are handled via Neutrik®
Combo connectors as well as Euro-style connectors. Fully
balanced input connections can be configured for pin 2 hot or
pin 3 hot. Ground lift switches are provided for each channel to
remove shield ground from chassis ground. Input sensitivity can
be internally configured to any of four industry standard levels
(see page 7). In stereo mode, a separate signal is required for
each channel. In dual-mono and bridged mono, a single signal is
connected into the channel 2 input. The input board supports
connections via XLR, 1/4 inch TRS or TS phone plugs and Eurostyle connectors.
Input Connectors
PUSH
PUSH
INPUT
CH 1
INPUT
CH 2
GND
LIFT
MONO
GND
LIFT
BALANCED & UNBALANCED CONNECTIONS
The inputs are designed to handle balanced or unbalanced
signals. When using unbalanced signals, it is recommended that
the cable be shielded two-conductor with the shield tied to
ground at the source. If shielded single conductor cable must be
used, tie the shield to ground at both the source and amplifier
Unbalanced Connections
input. In most cases, equipment that has unbalanced outputs will
have lower signal level. In these cases, adjust the amplifier’s gain
using the internal jumper settings as described on page 7. Long
runs of unbalanced signals are prone to loss, noise and hum.
Use balanced signals whenever possible.
Balanced Connections
Equivalent Input Schematic - ZR500 Amplifier
(Polarity and gain jumpers omitted for clarity.)
9
INSTALLATION & CONNECTIONS
OUTPUT CONFIGURATION
Output connections are handled via 3 female Neutrik® Speakon®
NL4 connectors. In stereo or dual-mono mode, both channels
can be connected via a single four conductor cable using the
Speakon® NL4 in the channel 1 output jack. Channel 1 is
connected at Pin1+ and Pin1-, and Channel 2 at Pin2+ and
Pin 2-.
SEQUENCE
CH2
MONO CH1
CH2+ Pin 1+
Pin 2+
CH2- Pin 1-
Pin 2-
CH1+
Pin 1+
CH1MONO+
MONO-
CH 2
BRIDGED
MONO
CH 1
The bridged mono Speakon ® jack provides the bridged output
on Pin1+ and Pin1-, or at Pin 2+ and Pin 2-. This allows a
connection to match any loudspeaker configuration.
The channel 2 Speakon ® output provides channel 2 output at Pin
1+ and Pin 1- in both stereo and dual-mono mode.
CH2 MONO CH1
Pin 2+
CH2+ Pin 1+
CH2- Pin 1-
Pin 2-
CH1+
Pin 1+
CH1-
Pin 1-
Pin 1Pin 1+ or 2+
Pin 1- or 2See user’s manual
MONO+
has been removed
MONO-
Pin 1+ or 2+
Pin 1- or 2-
As Illustrated in the Figures Above:
Channel 2 Speakon® Connector
Bridged Mono Speakon ® Connector
Channel 1 Speakon® Connector
Channel 2 (+) is connected at Pin 1+
Channel 2 (-) is connected at Pin 1-
Positive or Non-Inverted Mono output is connected at Pin 1+
Negative or Inverted Mono output is connected at Pin 1Positive or Non-Inverted Mono output may also be connected at Pin 2+
Negative or Inverted Mono output may also be connected at Pin 2-
Channel 1 (+) is connected at Pin1+
Channel 1 (-) is connected at Pin 1Channel 2 (+) may be connected at Pin 2+
Channel 2 (-) may be connected at Pin 2-
CAUTION: To avoid damaging the equipment, DO NOT ground any output terminal of the ZR amplifier.
SEQUENCING
For multi-amplifier installations, the sequencing feature limits the
overall inrush current by delaying power up of each amplifier in
the sequence by 1/2 second.
For locally sequenced power up, the power switch on the first
amplifier in the chain will act as the master switch. To power up
the entire rack of amplifiers, you simply turn on the power switch
of the first amplifier. The power switch of the first amplifier
should never be set to “Standby”. All the other amplifiers in the
chain must be set to “Standby,” so they can receive the poweron command from the first amplifier. Locate the Euro-style
connector labeled “Sequence” on the rear panel. Connect a
single conductor from the “SEND,” terminal of the first amplifier
to the “RECV” terminal of the second amplifier in the sequence.
Connect the “SEND” terminal of the second amplifier to the
“RECV” terminal of the third amplifier. Repeat until you reach
the end of the chain.
NOTE: The last amplifier in the series will not have any
connections at the “SEND” terminal and all sequence ground
terminals are connected either by a 16 gauge stranded
conductor (minimum) or via the common chassis ground
provide by a rack rail if rack mounted. Measuring from the
sequence ground to a point on the rack rail there should be no
more than 0.5 ohm DC resistance if the sequence grounds are
not directly connected to each other.
For remote sequenced power up, the power switch on all
amplifiers must be set to the “Standby” position. Apply a fused
external 5 - 15Vdc (greater than or equal to 20mA) supply
voltage to the “RECV” terminal via a switch and the “ ”
terminal. Connect the “SEND” terminal to the next amplifier’s
“RECV” terminal as referenced above for a “local sequence
power up”.
_
+
10
LIMITED WARRANTY INFORMATION
ZR SERIES POWER AMPLIFIERS: 5 YEARS*
ZR SERIES MODULES AND ACCESSORIES: 1 YEAR
* NOTE: The following warranty is exclusive to the United
States and its possessions and territories. In all other
countries the warranty period is limited to two years. Please
see your Carver Professional dealer or distributor for the
correct warranty information in your area or locale.
which may result from failure of this product. If your Carver
Professional product proves defective in material or
workmanship, the liability of Carver Professional shall be limited
to the repair or replacement, at the option of Carver
Professional, of any defective part.
WHAT IS COVERED
STATE LAWS MAY DIFFER
THIS LIMITED WARRANTY COVERS DEFECTS IN MATERIAL
AND WORKMANSHIP ONLY. This limited Warranty DOES NOT
extend to: 1) damage caused by shipment, 2) damage caused
by accident, misuse, abuse, failure to perform owner
maintenance, or operation contrary to the instructions in the
Carver Professional owner’s manual, 3) units on which the serial
number has been defaced, modified or removed and 4) damage
resulting from modification or attempted repair by any other
person than authorized by Carver Professional.
Some states do not allow limitations on how long an implied
warranty lasts and/or do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitations
may not apply to you. This warranty gives you specific legal
rights, and you may have other rights, which vary, from state to
state.
WHAT WE WILL PAY FOR
Carver Professional will pay all labor and material expenses for
items covered under this Limited Warranty. See the next section
concerning shipping charges.
OTHER IMPORTANT PROVISIONS
Carver Professional reserves the right to make changes in
design and improvements to its products without the
responsibility of installing such changes or improvements on
products previously sold by Carver Professional. We suggest
that you attach your purchase receipt to this Warranty and keep
both documents in a safe place. Thank you for your choice of a
Carver Professional Amplifier.
TO OBTAIN WARRANTY SERVICE
In the event your Carver Professional product requires service,
contact your Carver Professional Authorized Dealer / Contractor
or contact Carver Professional (ATTN: Customer Service Dept.)
9300 North Decatur, Portland, OR 97203, or call Customer
Service Department directly at (503) 978-3343. You will be
directed to an Authorized Carver Professional Service Station or
receive instructions to ship the unit to the factory. Please save
the original carton and packing materials in case shipping is
required. Please do not ship parcel post. Include a complete
description of the problem, the associated components and
connections, and a copy of the purchase receipt. Carver
Professional does not pay initial shipping costs. Return shipping
costs will be pre-paid if repairs were covered by the scope of
this warranty.
KEEP SALES RECEIPT
To obtain coverage under this limited warranty, you must retain
and provide your sales receipt. The warranty period begins from
the date of the first consumer purchase from an Authorized
Carver Professional Dealer. Any implied warranties for
merchantability and fitness for a particular purpose required by
any state law are limited in duration to the warranty period of
your product. The warranty set forth above is exclusive and no
other, written or oral is expressed or implied. Carver
Professional specifically disclaims the implied warranties and
merchantability and fitness for a particular purpose.
EXCLUSIONS
In no event shall Carver Professional be liable for property
damage, or any other incidental or consequential damages,
CARE & SERVICE ASSISTANCE
CARE
Wipe off the ZR Series Amplifier’s front panel and chassis from
time to time, with a soft, dry cloth. If you have something
stubborn to remove, use a mild dish soap or detergent sparingly
applied to a soft cloth. Don’t use alcohol, ammonia or other
strong solvents.
SERVICE ASSISTANCE
We suggest that you read the Limited Warranty completely to
fully understand your warranty/service coverage. Please
promptly complete and return the Warranty registration card.
Also, be sure to save the sales receipt in a safe place. It will be
necessary for warranty service. If your Carver Professional
product should require service, you may contact the Carver
Professional Technical Service Department by calling (503) 9783343 or by writing to us at the Factory address found on page
11. We will then direct you to the nearest in our national network
of Authorized Warranty Service Centers, or give you detailed
instructions on how to return the product to us for prompt
action. If you should have questions or comments, please write
to the Factory address shown on page 11, or contact us via
email at support@carverpro.com or at our web site:
www.carverpro.com. Please include the model and serial
number of your Carver Professional product, your complete
address and daytime phone number.
11
TROUBLE SHOOTING
If you are having trouble, or suspect a problem with your ZR Series amplifier, try some simple troubleshooting before contacting an
Authorized Carver Professional Dealer, Authorized Carver Professional Service Center or Carver Professional Technical Service.
Below are listed some general problems and items that should be checked in an attempt to resolve the difficulty.
NO SOUND, NO POWER
This is usually an indication of a power supply problem in either
the power line itself or the amplifier’s power supply. Check the
following:
7) The thermal breaker in the power transformer has opened.
Allow amplifier to cool and the breaker will reset itself.
PLAYBACK IS MIXED WITH HUM
1) ZR Series amplifier’s power is switched off.
2) Line cord is disconnected.
3) Poor fit between the plug and AC receptacle.
4) Power off at AC receptacle (check with tester or lamp).
5) The amplifier is plugged into a switched outlet. Verify that
the outlet is live.
6) ZR Series amplifier’s mains fuse has blown. This amplifier
contains no user serviceable fuses inside the chassis.
1) Check or replace the connecting cables, between source
and amplifier’s input.
2) Make sure that each screw terminal connection is tight.
3) Signal cables may have been routed too closely to the AC
cables, power transformers, motors or EMI inducing device.
4) Try connecting another source to the power amplifier inputs.
If the hum stops, the problem lies with the original source
component.
POWER ON, LOW OUTPUT OR NO OUTPUT
DISTORTION
Low or no output problems are usually signal-source, bad cable
or partial output short circuit related.
Distortion is usually caused by excessive loss in the input
controls (the mixer/equalizer/crossover cannot produce enough
output), overdriving resulting in output clipping, or current
limiting caused by excessively low load impedance.
1) The input level sensitivity controls are set too low.
2) Move the input connection to another amplifier that you
know is working to verify that it is not a source problem.
3) Check speaker connections. Be sure that there are no small
strands of wire touching similar strands coming from the other
wire in the cable.
4) Make sure the speakers are functioning correctly.
5) If you are using bridged-mono mode, ensure that the Input
and Output configurations are set correctly.
6) Use a voltmeter to determine if the power line voltage is
dropping excessively when the amplifier is driven hard.
1) Check the setting of the input level sensitivity controls. If
set too high, the preceding piece of equipment may overdrive
the input stage.
2) Check the speaker connections and verify that all screw
connections are tight and that there are no stray strands of wire
to cause short circuits.
3) Verify that the total load impedance presented to the
amplifier is within the limits described in this manual for mode of
operation selected.
FOR SERVICE OR CUSTOMER SUPPORT INQUIRIES
MAIL TO:
Carver Professional
Service Department OR Customer Support
9300 North Decatur
Portland, Oregon 97203
CALL:
SERVICE DEPT
503.9783343
CUSTOMER SUPPORT
503.978.3344
FAX:
503.978.3302
EMAIL:
support@carverpro.com
www.carverpro.com
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