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Harman Kardon AVR 55, Service Manual

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harman/kardon

AVR55

AUDIO/VIDEO

AC-3 PRO-LOGIC RECEIVER

SERVICE MANUAL

harman/kardon, Inc.

250 Crossways Park Dr.

Woodbury, New York   11797

Summary of Contents for AVR 55

Page 1: ...harman kardon AVR55 AUDIO VIDEO AC 3 PRO LOGIC RECEIVER SERVICE MANUAL harman kardon Inc 250 Crossways Park Dr Woodbury New York 11797 ...

Page 2: ...IEW 32 MECHANICAL PARTS LIST 34 ELECTRICAL PARTS LIST 35 SCHEMATICS AMPLIFIER UNTILED TILED 44 SCHEMATICS FRONT PCB UNTILED TILED 49 SCHEMATICS INPUT PCB UNTILED TILED 54 SCHEMATICS MAIN PCB UNTILED TILED 59 SCHEMATICS PRE IN PCB UNTILED TILED 64 SCHEMATICS AC 3 PCB UNTILED TILED 69 SCHEMATICS TUNER PCB UNTILED TILED 74 WIRING DIAGRAM UNTILED TILED 79 ...

Page 3: ...stortion TIM Unmeasurable Rise Time 16 µsec Slew Rate 40 V µsec FM Tuner Section Frequency Range 87 5 108 MHz Usable Sensitivity IHF 1 3 µV 14 2dBf Signal to Noise Ratio Mono Stereo 70 68dB Distortion Mono Stereo 0 3 0 5 Stereo Separation 1kHz 40dB Selectivity 400kHz 65dB Image Rejection 98MHz 65dB Tuner Output Level 1kHz 75kHz Dev 500mV AM Tuner Section Frequency Range 520 1710kHz Signal to Noise...

Page 4: ...r Volume Control Subwoofer Level Adjust 3 3 Center Level Adjust 3 4 Surround Level Adjust 3 5 Information Display 3 6 Remote Sensor Window 3 7 Numeric Keys 6 7 8 9 0 AVR 55 Speaker Headphones TUNE VID 1 REC 1 2 3 4 5 SPK MODE SURR OFF FRT REAR VID 2 SURR MODE NIGHT Volume Contour Bass Treble Balance MEMO DVD VID 1 DIGITAL INPUT DIGITAL Subwoofer Level Surround Level Center Level FM MODE AM FM CD T...

Page 5: ...he button once until it is in the out position When the front speakers are turned off sound will continue to be heard through the center and rear speakers and the headphone jack 8 AM FM Press this button to select the tuner as the AVR55 s input source When it is first pressed the last station tuned will appear Press it again to change between AM and FM bands 9 Tuning Button Press the left side of ...

Page 6: ...ting a loud playback when the digital modes are in use Video 2 Inputs These jack may be used to temporarily connect an audio video source such as a video game or camcorder to the AVR55 To select these jacks as the input press the Vid 2 Front Rear button until the green LED above that button is illuminated Contour Press this button when listening at low levels to activate special circuits that comp...

Page 7: ...n is in use The number that appears above the indicator is the number of minutes remaining before the AVR55 will return to the Standby mode F Main Information Display This display shows messages relating to the status input source surround mode tuner volume level or other aspects of unit s operation G Preset Indicator This indicator illuminates when one of the stations entered into the preset memo...

Page 8: ...emote Control Extension Input d CD Input e Phono Input f Coax Digital Input g AC 3 RF Input h Front Channel Preamp Outputs i Front Channel Main In Amp Inputs AM Antenna Connect the AM loop antenna supplied with the receiver to these terminals If an external AM antenna is used make connections to the AM and GND terminals in accordance with the instructions supplied with the antenna FM Antenna Conne...

Page 9: ...ur main VCR to these jacks Video 2 Play Inputs Connect the audio and video PLAY OUT jacks of a VCR DVD LD Satellite system or other video source to these jacks a Video Monitor Output Connect this jack to the video input of a TV or video projector to view the selected source b Remote Control Extension Output This jack may be con nected to other compatible Harman Kardon products so that they will re...

Page 10: ...DS DISP RDS DISP TUNE SEARCH m n o p q r s t u v w y MEMO CLEAR P SCAN x z b c e g h i k l a d d f j a Use Learn b Source Power c Main Power d Audio Source Selectors e Video Source Selectors f Night Mode g Delay h Digital Audio Input Selectors i AM FM j Select k Test Tone l Channel Select m Speaker Level Adjust n Main Volume o Display p Mute q Transport Controls r Tune Search and Fast Forward s Pr...

Page 11: ...s this button to begin the adjustment of the channel output levels The first press will circulate the test tone among the speakers A second press enables the levels to be set for each channel see page 19 l Channel Select Press this button to view the output level for the surround or center channels When the Test Tone button k has been pressed so that the Tone is audible pressing this button will c...

Page 12: ...ns serve as a ten button numeric key pad to enter tuner preset positions They are also to be used to select channel numbers when TV has been selected on the remote or to select track numbers on a CD DVD or LD player depending on how the remote has been programmed x Stereo Selector Press this but ton to turn the surround processing off and listen to an input in traditional two channel front left ri...

Page 13: ...3 source or the output of a conventional CD or LV player s PCM S P DIF output The AC 3 RF input g may ONLY be connected to the special AC 3 RF output of a laser disc player 5 Assemble the AM Loop Antenna sup plied with the unit as shown below Connect it to the AM and GND screw terminals 6 Connect an FM antenna to the FM 75 ohm connection The FM antenna may be an external roof antenna an inside pow...

Page 14: ...our television monitor or video projector System and Power Connections The AVR55 is designed for flexible use with external control components and power amplifiers These connections are easy to make during an initial installa tion or at a later date should you choose to upgrade your system Remote Control Extension If the receiver is placed behind a solid or smoked glass cabinet door the obstruc ti...

Page 15: ...ntrol Range The remote will operate at a range of up to 15 feet from the unit when the batter ies are fully charged The remote will also operate at an angle of up to 30 to either side of the unit Always point the remote transmitter at the front of the unit when issuing com mands If you find that remote com mands are not being received by the remote it may be necessary to use a remote IR sensor Rem...

Page 16: ...ndicates that the remote s memory is full or that the remote codes from the transmitting remote are not compatible with the unit s signal format 6 Continue to program any additional remote commands required using steps 2 through 5 When you have finished programming the remote slide the Use Learn switch to the left so that it is in the Use position Clearing the Remote Memory In normal operation cod...

Page 17: ... the front speakers in your particular installation Don t be afraid to move things around until the system sounds correct Optimize your speakers so that pans across the front of the room sound smooth and that sounds from all speakers appear to arrive at the listening position at the same time with out delay from the center speaker as opposed to the left and right speakers Surround speakers should ...

Page 18: ...indicate the current setting Release the button for a second and while the word LARGE is still blinking in the display press the Speaker Mode Selector Ó again until the word describing the type of center speaker installed in your system appears Select LARGE if your center channel speaker is a traditional full range speaker that is capable of reproducing frequencies below 100Hz Select SMALL if your...

Page 19: ...a minute to listen to the test noise from each speaker as the location indicated in the display changes Check to make certain that for example when the display reads TEST FRONT L that the test noise is coming from the front left speaker If the test tone s loca tion does not match the display for any channel press the Test Tone button k to end the adjustment and turn the unit off using the Main Pow...

Page 20: ...e the optimal delay time is the result ing figure For example if the front speakers are ten feet away and the surround speakers are five feet away the optimal delay time is figured as 10 5 5 Thus in this example the delay should be set at five milliseconds b When setting the delay time for an analog surround mode Pro Logic Hall Movie or Matrix take the result of the subtraction and add 15 to obtai...

Page 21: ...l or remote Make certain that the Dolby Digital Indicator B is illuminated Next press the Select button j to begin the adjustment process The Information Display F will show the current setting such as REAR 15 mS If adjustment is required immediately press the Delay button g on the remote to change the setting until it is closest to the desired time Within five seconds the display will return to n...

Page 22: ... first press the Vid 2 Input Selector e and then press the Vid 2 Front Rear button When the front panel inputs are selected a green LED will illuminate above the selector button When an audio source is selected the last video input used remains routed to the Video 1 and Monitor Outputs a This permits simultaneous viewing and listening to different sources During a listening session you may wish to...

Page 23: ...he most important features of the AVR55 is its ability to reproduce a full multichannel surround soundfield from Dolby Digital sources analog matrix surround encoded programs and stan dard stereo programs In all a total of seven listening modes are available on the AVR55 Selection of a surround mode is based on personal taste as well as the type of program source material being used For example mo...

Page 24: ...Vid 2 First select one of these sources so that the video appears at the unit s output before choos ing digital audio Next press the Digital Input button ı h that corresponds to the type of digital input used An LED will light above the data type selected and a message will scroll across the Information Display F to confirm your choice Finally press the AC 3 Dolby Digital button z Û to select Dolb...

Page 25: ...ext station press the button again If the AUTOindicator is NOT illuminated tap the Tune button 9 to advance one frequency increment at a time or press and hold it to locate a specific station When the TUNEDindi cator illuminates the station is properly tuned and should be heard with clarity To listen to the station in stereo press the FM Mode button 6 until the red STEREOindicator illuminates in t...

Page 26: ...material you copy Unauthorized duplication of copyrighted materials is prohibited by Federal law Output Level Trim Adjustment Normal output level adjustment for the AVR55 is established using the Test Tone as outlined on page 19 In some cases however it may be desirable to adjust the output levels using program material such as a test disc or a selection you are familiar with To adjust the output ...

Page 27: ...tion Weak batteries in remote Remote is in Learn position Remote sensor is obscured Local interference SOLUTION Make certain AC power cord is plugged into a live outlet Check to see if outlet is switch controlled Make certain that all input and speaker connections are secure Press Mute button Turn up volume control Check speaker wire connections at receiver and speaker ends for shorts Contact your...

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