Nad CI 9120 Service Manual

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Nad CI 9120 Service Manual

Extracted text from Nad CI 9120 Service Manual (Ocr-read)

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PRODUCT SAFETY SERVICING GUIDELINES CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFACTURERS 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 PRODUCTS 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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+15V-15V +15V -15V +15V OMC1 -15V +15V OMC1 OMC2 OMC3 OMC2 OMC3 +15V -15V +15V +15V +15V +15V -15V -15V +15V 2C32 4.7uF 50V 8 910 2U10C TL074 2R98 24K 2C39 4.7uF 50V 2R84 36K 2D2 1N4148 2C68 0.1uF 2C22 4.7uF 50V 2C494.7uF 50V 2C63 0.1uF 2C33 4.7uF/50V 2Q3 2SC2240 2R102 1K 2 3 1 2D7 BAS70-04 2C23 4.7uF 50V 2D5 1N4148 2R104 10K 2D11 1N4148 1213 14 2U11D TL074 2C59 0.1uF 2R100 9.1K 2R101 30.1K 2R82 20.0K 2R18 2.7M 8 910 2U9C TL074 2D15 1N4148 56 7 2U2B OPA4134 1213 14 2U9D TL074 2Q2 2SC2240 2R97 24K 2R87 4.7K 2R8 36K 2R79 20.0K 2R5 100k 1 32 4 11 2U11A TL074 2R81 100k 1 32 4 11 2U10A TL074 2C11 4.7uF 50V 2C5 22pF 2D3 1N4148 56 7 2U11B TL074 56 7 2U9BTL074 2R66 10K 2R27 162K 1 32 4 11 2U2A OPA4134 2R29 1M 2R65 162K 2R42 1K 2R1 162K 8 910 2U11C TL074 2C24 22pF 2C52 4.7uF 50V 2C51 4.7uF 50V 2R28 10K 2D16 1N4148 2D4 1N4148 2C1 4.7uF 50V 2C13 4.7uF 50V 2R30 4.75K 2 3 1 2D6 BAS70-04 2R7 22K 2C14 4.7uF 50V 2C64 0.1uF 2R45 22K 2R11 4.7K 2C3 4.7uF 50V 2R113 1M 2D9 1N4148 2D8 1N4148 2R112 10K 1213 14 2U2D OPA4134 2R68 4.75K 2R94 2.7M 2 3 1 2D13 BAS70-04 2C42 4.7uF 50V 2R58 10K 2R26 1K 2D17 1N4148 2 3 1 2D12 BAS70-04 2R4 1K 2R75 1M 2R40 162K 1 32 4 11 2U9A TL074 2D10 1N4148 2C20 4.7uF 50V 2D19 1N4148 2R46 36K 2C41 4.7uF 50V 2R61 39K 2C4 4.7uF 50V 2 3 1 2D1 BAS70-04 2R21 24K 2R25 30.1K 2R60 24K 2C65 0.1uF 2Q1 2SC2240 8 910 2U2C OPA4134 2R93 1.00M 2R22 24K 2R20 10K 2R119 24K 2C60 0.1uF 2D20 1N4148 2R64 1K 2R96 10K 2R23 39K 2C30 4.7uF 50V 2R36 10K 2R55 1.00M 2R103 162K 2R80 1K 2C66 0.1uF 2D21 1N4148 2C43 22pF 2R62 9.1K 2R59 24K 2R63 30.1K 2R44 20.0K 2D23 1N4148 2C61 0.1uF 2R37 1M 2R24 9.1K 1213 14 2U10D TL074 2R83 22K 2R99 39K 2R17 1.00M 2R56 2.7M 2R117 OMIT 2R49 4.7K 2R41 20.0K 2R118 9.1K 2C67 0.1uF 2D14 1N4148 2R74 10K 2R105 1M 2R43 100k 2R2 20.0K 2R106 4.75K 2C62 0.1uF 2 3 1 2D18 BAS70-04 2R78 162K 2R6 20.0K 2R67 1M 56 7 2U10B TL074 -56V pk max. 7V pk max 56V pk max. 7V pk max +7.95V @ FAULT +5.40V @ Fan-On 12345678910 2P4 10PIN 12345678910 2PX2 10PIN 2R127 47K 2R126 47K 2R128 47K OUTPUT3SOUTPUT2SOUTPUT1S PRE3PRE2PRE1 OUTPUT1S RETURN1 RETURN2 RETURN3 OUTPUT2S OUTPUT3S 2R15 1M 2R53 1M 2R91 1M RETURN1RETURN2RETURN3 IN1 IN2 IN3 IN1IN2IN3 OMC SENCE OMC SENCETEMP SENCE +15V-15V PRE1 PRE2 PRE3 -15V 56 7 2U1B TL074 1 32 4 11 2U1A TL074 8 910 2U1C TL074 2R132 10K 2R133 10K 2R134 10K 2Q4 2SC1815 2Q5 2SC1815 2Q6 2SC1815 2Q8 2SA1015 2Q9 2SA1015 2Q7 2SA1015 2D29 1N4148 2D28 1N4148 2D27 1N4148 2D24 1N4148 2D25 1N4148 2D26 1N4148 2R120 47K 2R129 10 2R121 47K 2R130 10 2R131 10 2R124 10K 2R123 10K 2R125 10K 2R122 47K OMC1 OMC2 OMC3 TEMP R TEMP R TEMP SENCE 1 2 3414 13 12 11 OPA4134 5 67 10 9 8 OUT A OUT B OUT D OUT C +IN A +IN B +IN C+IN D -IN A -IN B -IN C -IN D V+ V- TEXT ECB 2SA1015GR 2SC1815GR 2SC2240GR BAS70-04 TL074 OMC TM C 2000 NAD Electronics International, a division of Lenbrook Industries \ Limited 2C2 100P 2C7 100P 2C21 100P 12345678 2PX4 8PIN PROTECTION TEMP PRO AC DET PROTECTIONTEMP PROAC DET +15V -15V -15V +15V -15V +15V 2D22 1N4148 3R3 3K3 3R16 0.1/2W 3R19 0.1/2W 3C10 100P 3C12 100P 3Q5 C2240 3C5 10U/25V 3L1 10uH D2GND D2GND 3C7 47P 3R15 3.3/2W 3R5 10 3R18 120 3D4 1N4148 3C4 10U/25V 3R8 14K 3R10 1K 3R4 10 3R11 68 3R20 68 3R6 4K 3R9 200 3C6 220P 3C11 0.1uF 3Q2 A970 3Q4 D669 3Q3 A970 3Q1 B649 3C2 47uF/50V 3R14 200 3C13 0.1uF +15VA 3R7 220 3R12 68 3R17 33K 3C14 10n 3Q7 A970 3R2 68 3R13100 3C8 220uF/25V Bi-Polar 3R1 1K amp in1 3C9 47uF/50V 3D3 1N4148 3D2 1N4148 3D1 1N4148 3Q6 SAP15N 3Q8 SAP15P 3C1 0.1uF 3C3 15P +40V -40V 3R23 3K3 3R36 0.1/2W 3R39 0.1/2W 3C24 100P 3C26 100P 3Q13 C2240 3C19 10U/25V 3L2 10uH D2GND D2GND 3C21 47P 3R35 3.3/2W 3R25 10 3R38 120 3D8 1N4148 3C18 10U/25V 3R28 14K 3R30 1K 3R24 10 3R31 68 3R40 68 3R26 4K 3R29 200 3C20 220P 3C25 0.1uF 3Q10 A970 3Q12 D669 3Q11 A970 3Q9 B649 3C16 47uF/50V 3R34 200 3C27 0.1uF +15VA 3R27 220 3R32 68 3R37 33K 3C28 10n 3Q15 A970 3R22 68 3R33 100 3C22 220uF/25V Bi-Polar 3R21 1K amp in2 3C23 47uF/50V 3D7 1N4148 3D6 1N4148 3D5 1N4148 3Q14 SAP15N 3Q16 SAP15P 3C15 0.1uF 3C17 15P +40V -40V 3R43 3K3 3R56 0.1/2W 3R59 0.1/2W 3C38 100P 3C40 100P 3Q21 C2240 3C33 10U/25V 3L3 10uH D2GND D2GND 3C35 47P 3R55 3.3/2W 3R45 10 3R58 120 3D12 1N4148 3C32 10U/25V 3R48 14K 3R50 1K 3R44 10 3R51 68 3R60 68 3R46 4K 3R49 200 3C34 220P 3C39 0.1uF 3Q18 A970 3Q20 D669 3Q19 A970 3Q17 B649 3C30 47uF/50V 3R54 200 3C41 0.1uF +15VA 3R47 220 3R52 68 3R57 33K 3C42 10n 3Q23 A970 3R42 68 3R53 100 3C36 220uF/25V Bi-Polar 3R41 1Kamp in3 3C37 47uF/50V 3D11 1N4148 3D10 1N4148 3D9 1N4148 3Q22 SAP15N 3Q24 SAP15P 3C29 0.1uF 3C31 15P +40V -40V 1 2 2RT1 100K@25C 12345678910 2PX1 12PIN amp in1amp in2amp in3 output3output2output1 +15VA output1 output2 output3 3R62 1K 3R61 15K 3R68 22K 3C43 22N 3Q26 C1815 3D13 1N4148 3R64 1K 3R63 15K 3R69 22K 3C44 22N 3Q27 C1815 3D14 1N4148 3R66 1K 3R65 15K 3R70 22K 3C45 22N 3Q28 C1815 3D15 1N4148 3R74 22K 3C50 330u/16 3C49 0.22u 3R72 15K 3R73 56K 3C47 33u/50V PROTECTION CIR. +40V 1 2 34 5 6 7 8IC44 UPC1237HA 3R75 56K 3R76 56K 3R77 56K 3RL1B 12V RELAY 3RL2B 12V RELAY 3RL3B 12V RELAY 3D16 1N4148 +40V 3Q25 2SB647 3R67 6K8 3C46 10u/25V 3RL1A 5A RELAY 3RL2A 5A RELAY 3RL3A 5A RELAY output1 output2 output3 output1 output2 output3 3R78 3K3 +40V +15VA 3D17 15V D2GND 12345678 2P3 8PIN -40V+40V 12345678 2PX3 8PIN 12345 2P2 5PIN 3C52 100uF/50V 3C53 100uF/50V 3C54 100uF/50V 3C55 100uF/50V 3C56 100uF/50V 3C57 100uF/50V +40V -40V 3C51 4.7uF 3Q29 2SC1815 3C58 47uF/25V D2GND B DCS E E S CDB SAP15N SAP15P 2Q10 2SC1815 2R3 1K 3Q30 2SB647 3R80 10K 3R81 39K 3R82 10K +40V