harman/kardon HK3480 STEREO RECEIVER SERVICE MANUAL CONTENTS ESD WARNING.........................................2 LEAKAGE TESTING....................................3 SPECIFICATIONS .....................................4 FRONT PANEL CONTROLS .................. ....5 REAR PANEL CONNECTIONS ....................8 REMOTE CONTROL FUNCTIONS ..............10 TROUBLESHOOTING GUIDE.....................12 PROCESSOR RESET...............................12 AMPLIFIER BIAS ADJUSTMENT.................13 BULLETIN HK2003-10......................... .....14 BULLETIN HK2004-02......................... .....16 DISASSEMBLY PROCEDURES..................17 EXPLODED VIEW ....................................20 BLOCK DIAGRAM.....................................21 FRONT PANEL DISPLAY............................22 IC DESCRIPTIONS/PINOUTS.....................26 ELECTRICAL PARTS LIST .........................40 PCB DRAWINGS......................................46 SCHEMATICS..........................................48 WIRING DIAGRAM....................................54 PACKAGE...............................................55 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev2 2/2006 HK3480 harman/kardon 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 build-up or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical change 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. Immediately 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 handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together or your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES devices. Each precaution in this manual should be followed during servicing. Components identified with the IEC symbol in the parts list are special significance to safety. When replacing a component identified with , use only the replacement parts designated, or parts with the same ratings or resistance, wattage, or voltage that are designated in the parts list in this manual. Leakage-current or resistance measurements must be made to determine that exposed parts are acceptably insulated from the supply circuit before retuming the product to the customer. 2 HK3480 harman/kardon Before returning the unit to the user, perform the following safety checks : 1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the unit. 2. Be sure that any protective devices such as nonmetallic control knobs, insulating fishpapers, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacity networks, mechanical insulators, etc. Which were removed for the servicing are properly re-installed. 3. Be sure that no shock hazard exists ; check for leakage current using Simpson Model 229 Leakage Tester, standard equipment item No. 21641, RCA Model WT540A or use alternate method as follows : Plug the power cord directly Into a 120 volt AC receptacle (do not use an Isolation Transformer for this test). Using two clip leads, connect a 1500 ohms, 10watt Resistor paralleled by a 0.15uF capacitor, in series with all exposed metal cabinet parts and a known earth ground, such as a water pipe or conduit. Use a VTVM or VOM with 1000 ohms per volt, or higher sensitivity to measure the AC voltage drop across the resistor. (See diagram) Move the resistor connection to each exposed metal part having a return path to the chassis (antenna, metal, cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. (This test should be performed with the 0.35 volt RMS or more is excessive and indicates a potential shock hazard which must be corrected before returning the unit to the owner. 3 HK3480 harman/kardon HK 3480 TECHNICAL SPECIFICATIONS Audio Section Stereo Mode Continuous Average Power (FTC) 120 Watts per channel, 20Hz­20kHz @ < 0.07% THD, both channels driven into 8 ohms 150 Watts per channel, 20Hz­20kHz @ < 0.2% THD, both channels driven into 4 ohms Input Sensitivity/Impedance Linear (High Level) Signal-to-Noise Ratio (IHF-A) Frequency Response @ 1W (+0dB, ­3dB) High Instantaneous Current Capability (HCC) Transient Intermodulation Distortion (TIM) Rise Time Slew Rate 200mV/47k ohms 95dB 10Hz ­ 110kHz ±45 amps Unmeasurable 16µsec 40V/µsec FM Tuner Section Frequency Range Usable Sensitivity Signal-to-Noise Ratio Distortion Stereo Separation Selectivity Image Rejection IF Rejection Tuner Output Level AM Tuner Section Frequency Range Signal-to-Noise Ratio Usable Sensitivity Distortion Selectivity Video Section Television System Signal Format Input Level Input Impedance Sync Polarity Output Level Output Impedance Video Frequency Response General Power Requirement Power Consumption Dimension (Max) Width Height Depth Weight 87.5 ­ 108MHz IHF 1.12µV/13.5dBf Mono/Stereo 73/72dB Mono/Stereo 0.3/0.4% 40dB @ 1kHz ±400kHz, 65dB >80dB >100dB 1kHz, ±100kHz, Dev 500mV 520 ­ 1720kHz >40dB Loop 500µV/M 1kHz, 50% Mod 0.8% ±10kHz, >25dB Depth measurement includes knobs, buttons and terminal connections. Height measurement includes feet and chassis. All features and specifications are subject to change without notice. Harman Kardon and Power for the Digital Revolution are registered trademarks of Harman International Industries, Incorporated. NTSC/PAL/SECAM Composite 1Vp-p 75 ohms, unbalanced Negative 1Vp-p 75 ohms, unbalanced 10Hz ­ 10MHz AC 120V/60Hz 3W standby, 280W maximum (both channels driven) (Product) 17.4 inches (442mm) 6.6 inches (168mm) 15 inches (382mm) 23.0 lb (10.44kg) (Shipping) 21.5 inches (545mm) 9.9 inches (251mm) 17.9 inches (455mm) 27.3 lb (12.39kg) 18 TECHNICAL SPECIFICATIONS 4 HK3480 harman/kardon FRONT-PANEL CONTROLS 26 25 24 HK 3480 SPEAKER 1 SPEAKER 2 VMAx AUTO TUNED STEREO PRESET PHONO FM AM CD VID 1 VID 2 VID 3 TAPE M. 23 2 1 3 4 5 6 7 8 9 ) @$ !# % ^ * & ( 21 20 22 NOTE: To make it easier to follow the instructions that refer to this illustration, a larger copy may be downloaded from the Product Support section for this product at www.harmankardon.com. 1 System Power Control 2 Power Indicator 3 Headphone Jack 4 Mute 5 Speaker 1 Selector 6 Phono Input Selector 7 Speaker 2 Selector 8 T-Mon Input Selector 9 Tuning Button 1 System Power Control: Press this button to turn on the HK 3480; press it again to turn the unit off. The Power Indicator 2 above the switch will initially turn red as the HK 3480 performs a self-check, and it will change to blue when the unit is on and ready for use. 2 Power Indicator: This LED will light in amber when the unit is in the Standby mode to signal that the unit is ready to be turned on. When the unit is turned on, the indicator will briefly turn red, and then change to blue. A red indicator during normal operation means that the unit is in the Protect mode, and should be turned off and then checked for a possible speaker-wire short circuit. 3 Headphone Jack: This jack may be used to listen to the HK 3480's output through a pair of headphones. Be certain that the headphones have a standard 1/4" stereo phone plug. ) CD Input Selector ! Video 1 Input Selector @ Preset Scan # Video 2 Input Selector $ Video 3 Input Selector % Preset Selector ^ VMAx Selector & FM/AM Selector * Sleep Button 4 Mute: Press this button to momentarily silence the speaker output of the HK 3480. The message MUTE will flash in the Main Information Display B, and the Mute Indicator K will blink. 5 Speaker 1 Selector: Press this button to turn the speakers connected to the Speaker 1 Output Terminals < on or off. 6 Phono Input Selector: Press this button to select the output of a turntable that is connected to the Phono Inputs TM. 7 Speaker 2 Selector: Press this button to turn the speakers connected to the Speaker 2 Output Terminals > on or off. 8 T-Mon Input Selector: Press this button to listen to the output of a tape recorder connected to the Tape Monitor Inputs ¢. The dot to the left of the Tape Monitor Input Indicator D will flash to indi( FM Mode Selector Ó Bass Control Ô Treble Control Video 3 Audio/Video Input Ò Balance Control Ú Volume Control Û Information Display Ù Remote Sensor Window cate that the input source is being monitored when the HK 3480 is connected to a three-head tape deck or another unit with off-head playback. See page 15 for more information on monitoring tape recordings. 9 Tuning Button: Press the left side of the button to tune lower-frequency stations and the right side of the button to tune higher-frequency stations. When a station with a strong signal is tuned, the Tuned Indicator I will light. A brief (1/2-second) press of the button will manually tune to the next frequency increment, while pressing and holding the button for a longer period will automatically tune to the next station with a signal strong enough for acceptable reception. ) CD Input Selector: Press this button to listen to the output of a CD player connected to the CD Audio Inputs £. 5 FRONT-PANEL CONTROLS 5 HK3480 harman/kardon FRONT-PANEL CONTROLS ! Video 1 Input Selector: Press this button to listen to and/or view the output of a device connected to the Video 1 Inputs §. @ Preset Scan: Press this button to automatically scan through the stations that have been programmed in the HK 3480's memory. The tuner will play five seconds of each station before moving to the next preset station. To stop the scan when the desired station is heard, press the button again. If no preset stations have been programmed into the HK 3480's memory, the message 0 PRESET will flash in the Main Information Display B when this button is pressed. (See page 15 for more information on the tuner memory system.) # Video 2 Input Selector: Press this button to listen to and/or view the output of a device connected to the Video 2 Inputs ·. $ Video 3 Input Selector: Press this button to listen to and/or view the output of a device connected to the Video 3 Inputs ª on either the front or rear panel. If devices are connected to both the frontand rear-panel Video 3 Inputs ª , then the device connected to the rear-panel Video 3 Inputs ª will be selected first, as indicated by the dot to the left of the Video 3 Input Indicator D being steadily lit. To select the device connected to the front-panel Video 3 Inputs , press the Video 3 Input Selector $ again so that the dot to the left of the Video 3 Input Indicator D flashes. Each subsequent press of the Video 3 Input Selector $ will toggle between the front and rear Video 3 Inputs ª . % Preset Selector: Press this button to step up or down through the list of stations that has been entered into the preset memory. If no preset stations have been programmed into the HK 3480's memory, the message 0 PRESET will flash in the Main Information Display B when this button is pressed. (See page 15 for more information on tuner programming.) ^ VMAx Selector: Press this button to engage VMAx processing of a stereo input. The VMAx Mode Indicator A will light, and you will notice a wider, more spacious sound field. In order to obtain maximum benefit, you should be seated midway between the two loudspea ...