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NAD
SERVICE
MANUAL
CI
9060/9120
CI 9060/9120
SIX CHANNEL AMPLIFIER
TWELVE CHANNEL AMPLIFER
SIX
CHANNEL
AMPLIFIER
TWELVE
CHANNEL
AMPLIFER


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PRODUCT SAFETY SERVICING GUIDELINES
CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN
ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS
WITHOUT MANUFACTURER'S APPROVAL. UNAUTHORIZED
MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT
MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING
PROPERTY DAMAGE OR USER INJURY.
SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU
ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING
SAFETY CHECKS AND SERVICING GUIDELINES. TO DO
OTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDS
AND INJURY TO THE USER.
WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR
PROTECTION FROM AC LINE SHOCK.
SAFETY CHECKS
AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN
CORRECTED. A CHECK SHOULD BE MADE OF THE
FOLLOWING.
SUBJECT : FIRE & SHOCK HAZARD
1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN
SUCH A WAY AS TO AVOID POSSIBILITY OF ADJACENT
COMPONENT SHORTS. THIS IS ESPECIALLY IMPORTANT
ON THOSE MODULES WHICH ARE TRANSPORTED TO AND
FROM THE REPAIR SHOP.
2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE
DEVICES SUCH AS INSULATORS, BARRIERS, COVERS,
SHIELDS, STRAIN RELIEFS, POWER SUPPLY CORDS, AND
OTHER HARDWARE HAVE BEEN REINSTALLED PER
ORIGINAL DESIGN. BE SURE THAT THE SAFETY PURPOSE
OF THE POLARIZED LINE PLUG HAS NOT BEEN DEFEATED.
3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE
COLD SOLDER JOINTS, SOLDER SPLASHES OR SHARP
SOLDER POINTS. BE CERTAIN TO REMOVE ALL LOOSE
FOREIGN PARTICLES.
4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR
DETERIORATION TO PARTS AND COMPONENTS. FOR
FRAYED LEADS, DAMAGED INSULATION (INCLUDING AC
CORD). AND REPLACE IF NECESSARY FOLLOW ORIGINAL
LAYOUT, LEAD LENGTH AND DRESS.
5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVING
TUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEAD
TENSION AROUND PROTRUDING METAL SURFACES MUST
BE AVOIDED.
6. ALL
CRITICAL
COMPONENTS
SUCH
AS
FUSES,
FLAMEPROOF RESISTORS, CAPACITORS, ETC. MUST BE
REPLACED WITH EXACT FACTORY TYPES, DO NOT USE
REPLACEMENT COMPONENTS OTHER THAN THOSE
SPECIFIED OR MAKE UNRECOMMENDED CIRCUIT
MODIFICATIONS.
7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM AN
AC LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF
THE CABINET, (THE CHANNEL SELECTOR KNOB, ANTENNA
TERMINALS. HANDLE AND SCREWS) TO BE SURE THE SET
IS SAFET TO OPERATE WITHOUT DANGER OF ELECTRICAL
SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER
DURING THIS TEST USE AN AC VOLTMETER, HAVING 5000
OHMS PER VOLT OR MORE SENSITIVITY, IN THE
FOLLOWING MANNER; CONNECT A 1500 OHM 10 WATT
RESISTOR, PARALLELED BY A .15 MFD, 150V AC TYPE
CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND
(WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED
METALLIC PARTS, ONE AT A TIME.
MEASURE THE AC VOLTAGE ACROSS THE COMBINATION
OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR.
REVERSE THE AC PLUG AND REPEAT AC VOLTAGE
MEASUREMENTS FOR EACH EXPOSED METALLIC PART.
VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S.
THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUE
EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.
SUBJECT : GRAPHIC SYMBOLS
SUBJECT : TIPS ON PROPER INSTALLATION
1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS,
CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER
OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED
AIR FLOW.
2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS:
OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A
FACTOR, NEAR STEAM RADIATORS WHERE STEAM
LEAKAGE IS A FACTOR, ETC.
3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCT
REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE
USE OF DECORATIVE SCARVES OR OTHER COVERINGS
WHICH MIGHT OBSTRUCT VENTILATION.
4. WALL AND SHELF MOUNTED INSTALLATIONS USING A
COMMERCAL MOUNTING KIT MUST FOLLOW THE FACTORY
APPROVED MOUNTING INSTRUCTIONS A PRODUCT
MOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITS
ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN
SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS
THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS
MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM
LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS.
5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A
PRODUCT ON SLOPING SHELF OR A TILTED POSITION,
UNLESS THE PRODUCT IS PROPERLY SECURED.
6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE
ON ITS MOUNTING TO THE CART. CAUTION THE
CUSTOMER ON THE HAZARDS OF TRYING TO ROLL A CART
WITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP
PILE CARPETS.
7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR
STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS
LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC
MODEL OF TELEVISION RECEIVER OR GENERICALLY
APPROVED FOR USE WITH T.V.'S OF THE SAME OR
LARGER SCREEN SIZE.
8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION
CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS
SPROUTING FROM A SINGLE OUTLET CAN LEAD TO
DISASTROUS CONSEQUENCES TO HOME AND FAMILY.
THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN
EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE
PRESENCE OF UNINSULATED "DANGEROUS VOLTAGE" WITHIN THE
PRODUCT'S ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO
CONSTITUTE A RISK OF ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS
INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT
OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE
LITERATURE ACCOMPANYING THE APPLIANCE.


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SERVICING PRECAUTIONS
CAUTION : Before servicing the A/V Receiver covered by this
service data and its supplements and addends, read and follow the
SAFETY PRECAUTIONS. NOTE
: if unforeseen circumstances
create conflict between the following servicing precautions and any
of the safety precautions in this publication, always follow the safety
precautions.
Remember Safety First:
General Servicing Precautions
1. Always unplug the A/V Receiver AC power cord from the AC
power source before:
(1) Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2) Disconnecting or reconnecting any internal electrical plug or
other electrical connection.
(3) Connecting a test substitute in parallel with an electrolytic
capacitor.
Caution : A wrong part substitution or incorrect polarity installation
of electrolytic capacitors may result in an explosion hazard.
2. Do not spray chemicals on or near this A/V Receiver or any of its
assemblies.
3. Unless specified otherwise in this service data, clean electrical
contacts by applying an appropriate contact cleaning solution to
the contacts with a pipe cleaner, cottontipped swab, or
comparable soft applicator.
Unless specified otherwise in this service data, lubrication of
contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks with which
instruments covered by this service manual might be equipped.
5. Do not apply AC power to this A/V Receiver and/or any of its
electrical assemblies unless all solid-state device heat sinks are
correctly installed.
6. Always connect test instrument ground lead to the appropriate
ground before connecting the test instrument positive lead. Always
remove the test instrument ground lead last.
Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet and turn the
power on. Connect an insulation resistance meter(500V) to the
blades of the attachment plug. The insulation resistance between
each blade of the attachment plug and accessible conductive parts
(Note 1) should be more than 1M-ohm.
Note 1 : Accessible Conductive Parts including Metal panels, Input
terminals, Earphone jacks, etc.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by
static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical Es
devices are integrated circuits and some field effect transistors and
semiconductor chip components.
The following techniques should be used to help reduce the
incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground.
Alternatively, obtain and wear a commercially available
discharging wrist strap device, which should be removed for
potential shock reasons prior to applying power to the unit under
test.
2. After removing an electrical assembly equipped with ES devices,
place the assembly on a conductive surface such as aluminum
foil, to prevent electrostatic charge buildup or exposure of the
assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES
devices.
4. Use only an antistatic solder removal device. Some solder
removal devices not classified a "anti-static" can generate
electrical charges sufficient to damage ES devices.
5. Do not use freonpropelled chemicals. These can generate
electrical charge sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically
shorted together by conductive foam, aluminum foil, or
comparable conductive material).
7. lmmediately before removing the protective material from the
leads of a replacement ES device, touch the protective material to
the chassis or circuit assembly into which the device will be
installed.
Caution : Be sure no power is applied to the chassis or circuit, and
observe all other safety precautions.
8. Minimize bodily motions when handing unpackaged replacement
ES devices. (Normally harmless motion such as the brushing
together of your clothes fabric or the lifting of your foot from a
carpeted floor can generate static electricity sufficient to damage
an ES device.)


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Specifications
Power Rating
85 Watts continuous average power into 6 Ohms at any frequency between 20Hz and 20kHz
with all channels driven at less than 0.03% THD.
86 Watts continuous average power into 4 Ohms at any frequency between 20Hz and 20kHz
with all channels driven at less than 0.03% THD.
IM Distortion (SMPTE)
80 Watts into 6 Ohms
< 0.03 %
80 Watts into 4 Ohms
< 0.03 %
IM Distortion (CCIF, Any Combination from 1kHz to 20kHz)
80 Watts into 6 Ohms
< 0.03 %
80 Watts into 4 Ohms
< 0.03 %
THD + Noise at 1 Watt into 6 Ohms
20Hz
0.03 %
1kHz
0.03 %
10kHz
0.03 %
20kHz
0.03 %
THD + Noise at 80 Watts into 6 Ohms
20Hz
0.03 %
1kHz
0.03 %
10kHz
0.03 %
20kHz
0.03 %
Frequency Response @ 1 Watt into 6 Ohms
10Hz to 20kHz
+ 0.5, -1.0dB
Power Bandwidth (-3dB)
5Hz to 45kHz
Gain
28dB
Amplifier Trimmer Adjustment Range
14 ± 2 dB
Damping Factor
>30
Dynamic Headroom into 6 Ohms
1.6dB
OMC Activation
< 3 Ohms across any speaker terminal
ATO Logic
SENSE Input Sensitivity
>10mV rms
12V Trigger Input Voltage Range
10.0V to 20.0V DC, 100k Ohms
12V Trigger Output Current
25 ± 5mA, 470 Ohms
Input Impedance
25k Ohms
Input Sensitivity
80 Watt into 6 Ohms
1V rms
1 Watt into 6 Ohms
114mV rms
Damping Factor 20Hz to 20kHz
>31
Rise Time
5kHz, 50V peak-to-peak square wave,
20% to 80%
4 µs
Power Consumption (Continuous, All Channels Driven)
Quiescent
84/168VA
Maximum
960/1920VA
80 Watts into 6 Ohms
744/1488VA
80 Watts into 4 Ohms
900/1800VA
GENERAL
Power (available in 240V)
120VAC/50-60Hz
Ambient Operating Temperature
< 100 °F (40 °C)
Operating Temperature
68 °F (20 °C)
above ambient temperature
Ventilation Air Flow
150 cubic feet/minute maximum
Net Chassis Dimensions
17.2x5.3x17.8 inches (437x133x451 mm)
or 3 rack heights
Maximum Gross Dimensions
18.9x19.0x5.7 inches (480.1x481.7x144.8 mm)
(includes rack mounting hardware,
feet and speaker terminals)
Weight CI 9060, Packed
58 lb (26.4 Kg), 68 lb (31 Kg)
Weight CI 9120, Packed
80 lb (36.5 Kg), 90 lb (41 Kg)


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+15V
-15V
+15VA
-15VA
R-IN
L-IN
IN5
IN3
IN1
IN6
IN2
IN4
IN5
IN2
IN4
IN6
IN1
IN3
-15V
+15V
+15VA
-15VA
-15VA
+15VA
1C8
0.1uF
1Q2
2SC1815GR
1
2
1RCA8
RCA JACK
1R29
1 (C Version)
1
2
1RCA1*
RCA JACK
1
2
1RCA6
RCA JACK
1R1
100K
CW
3
1
2
1RV3
20K
1R26
1 (C Version)
1
2
1RCA9
RCA JACK
1R2
100K
1
3
2
8
4
U1A
OPA2134
1R32
1 (C Version)
1R27
4.99K
1R19
220K
1Q6
2SC1815GR
1R4* 1 (C Version)
1R21
220K
CW
3
1
2
1RV2
20K
1R17
220K
1R8* 1 (C Version)
CW
3
1
2
1RV6
20K
+
1
2
1C6
4.7uF 10V
1C11
0.1uF
1
2
1RCA11
RCA JACK
CW
3
1
2
1RV1
20K
1
2
1RCA14
RCA JACK
1R35
1 (C Version)
1
2
1RCA3*
RCA JACK
1R15
220K
1C10
0.1uF
1Q4
2SC1815GR
1R13
220K
1D3
1N4148
1D4
1N4148
7
5
6
U1B
OPA2134
1D1
1N4148
+
1
2
1C4
4.7uF 10V
1R37
4.99K
1
3
2
8
4
U2A
OPA2134
1D2
1N4148
1R33
4.99K
1
2
1RCA13
RCA JACK
1
2
1RCA16
RCA JACK
1C12
0.1uF
1R24
4.99K
+
1
2
1C7
4.7uF 10V
1
2
3
4
5
6
7
1P4
7PIN
1R31
4.99K
1R34
4.99K
1
2
1RCA4
RCA JACK
1Q5
2SC1815GR
CW
3
1
2
1RV4
20K
7
5
6
U2B
OPA2134
1C2
10pF
1
2
1RCA15
RCA JACK
1R5
100K
1R36
4.99K
1
2
1RCA10
RCA JACK
1R12
100K
CW
3
1
2
1RV5
20K
1
2
1RCA5
RCA JACK
+
1
2
1C5
4.7uF 10V
1
2
1RCA7
RCA JACK
1R22
30M
1R9
100K
1R28
4.99K
1C13
0.1uF
1R38
10K
1Q3
2SC1815GR
1R20
220K
1Q1
2SC1815GR
1
2
1RCA2
RCA JACK
1R14
1 (C Version)
1R7
75.0
1R30
4.99K
+
1
2
1C3
4.7uF 10V
1R18
4.99K
1
2
1RCA12
RCA JACK
+
1
2
1C1
4.7uF 10V
1R16
4.99K
1R11
75.0
1R6
100K
1R3
75.0
1R23
1 (C Version)
1R25
4.99K
1R10
100K
FlexPad
NOTE:
Six RCA Jumpers are provided for each
FlexPad that is installed in a chassis. For
Mono operation, an RCA Jumper is
installed
on the rear panel from J5 to J6, another
from
J7 to J8, another from J9 to J10, another
from J11 to J12, another from J13 to J14,
and the last from J15 to J16. J17 is not
needed, and omitting it prevents the user
from continuing the daisy-chain onto the
second FlexPad, if installed.
Components with the " * " mark are not
inserted in CI9120's second Flexpad.
1
2
3
4
5
6
1P1
6PIN
1
2
3
4
5
6
1P2
6PIN
1Q7*
2SC1815GR
1D7*
1N4148
1R39*
1M
+15VA
1
2
1P3*
2PIN
1D5
1N4148
1D6
1N4148
1R41
220
1R52
100
1R40
220
1C14
470p
1R43
220
1R53
100
1C18
470p
1R51
220
1R57
100
1C17
470p
1R49
220
1R56
100
1C16
470p
1R47
220
1R55
100
1C15
470P
1R45
220
1R54
100
1C19
470p
1R42
220
1R44
220
1R46
220
1R48
220
1R50
220
-15V
-15V
-15V
-15V
-15V
-15V
+15V
+15V
+15V
+15V
+15V
+15V
1R62
100
1R61
100
1R60
100
1R59
100
1R58
100
1R63
100
AmpInput2
AmpInput3
AmpInput1
AmpInput4
AmpInput5
L-IN
R-IN
AmpInput6
AmpInput1
AmpInput2
AmpInput3
AmpInput4
AmpInput5
AmpInput6
INPUT-SENCE
INPUT-SENCE
In Sence
In Sence
To Mather
Board 4P7
or Slave
Mather
board 5P7
To a Trigger
Board 9P4
To 2nd or
4th Amp
Module
2P3
To 1st or
3rd Amp
Module
2P3
CH1 or CH7
IN
CH1 or CH7
IN
IN
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
CH2 or CH8
CH2 or CH8
CH3 OR CH9
CH5 or CH11
CH6 or CH12
CH3 or CH9
CH4 or CH10
CH4 or CH10
CH5 or CH11
1C20*
0.1uF
1R64
10/1W
1C21
33uF
1C22
33uF
1C23
33uF
1C24
33uF
1C25
33uF
1C26
33uF
1R70
47k
1R69
47k
1R68
47k
1R67
47k
1R66
47k
1R65
47k
1C29
10uF
1C30
10uF
1C32
10uF
1C28
10uF
1C27
10uF
1C31
10uF
+15V
-15V
1
2
3
4
1P5
4PIN
R-IN
L-IN
Note:
IN CI9060, 1P5 IS
NOT INSERT
To Another
Flex-pad
Board 1P5
1C33
0.1uF
INPUT-SENCE
TEXT
EC B
2SC1815GR
1
2
3
4
8
7
6
5
OPA2134
OUT A
-IN A
+IN A
V-
+IN B
-IN B
OUT B
V+
FlexPad
TM
C 2000 NAD Electronics International, a division of Lenbrook Industries Limited
ATO Logic
TM
C 2000 NAD Electronics International, a division of Lenbrook Industries Limited
Sleep/Wake
+
1
2
1C9
33uF
3.3 (AH Version)
3.3 (AH Version)
3.3 (AH Version)
3.3 (AH Version)
3.3 (AH Version)
3.3 (AH Version)
3.3 (AH Version)
3.3 (AH Version)