Harman Kardon HK3485 Service Manual
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Harman Kardon HK3485 Service Manual

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See also: Owner's Manual
harman/kardon
ESD WARNING.........................................2
LEAKAGE TESTING....................................3
SPECIFICATIONS .....................................4
PACKAGE................................................5
FRONT PANEL CONTROLS .................. ....6
REAR PANEL CONNECTIONS ....................9
REMOTE CONTROL FUNCTIONS ..............11
CONNECTIONS/INSTALLATION.................13
OPERATION............................................19
TROUBLESHOOTING GUIDE.....................23
Released 2007
Discontinued XXXX
HK3485
STEREO RECEIVER
SERVICE MANUAL
CONTENTS
harman/kardon, Inc.
250 Crossways Park Dr.
Woodbury, New York 11797
PROCESSOR RESET...............................23
DISASSEMBLY PROCEDURES..................24
EXPLODED VIEW ....................................25
AMPLIFIER BIAS ADJUSTMENT.................26
BLOCK DIAGRAM.....................................27
IC DESCRIPTIONS/PINOUTS.....................28
ELECTRICAL PARTS LIST ........................42
PCB DRAWINGS......................................47
SCHEMATICS..........................................49
WIRING DIAGRAM....................................51
Rev0
7/2007

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  • Page 1: Table Of Contents

    HK3485 STEREO RECEIVER SERVICE MANUAL CONTENTS ESD WARNING…………………………………..2 PROCESSOR RESET……………………….…23 LEAKAGE TESTING………………..….…..…..3 DISASSEMBLY PROCEDURES………………24 SPECIFICATIONS ……………………………..4 EXPLODED VIEW …………………….………..25 PACKAGE…………………………………….…..5 AMPLIFIER BIAS ADJUSTMENT……….…….26 FRONT PANEL CONTROLS ……………… ….6 BLOCK DIAGRAM…………..……….……….…27 REAR PANEL CONNECTIONS …………..…9 IC DESCRIPTIONS/PINOUTS…………………28 REMOTE CONTROL FUNCTIONS ………..…11 ELECTRICAL PARTS LIST ……………………42...

  • Page 2: Esd Warning

    HK3485 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.

  • Page 3: Leakage Testing

    HK3485 SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CURRENT CHECK Measure leakage current to a known earth ground (water pipe, conduit, etc.) by connecting a leakage current tester...

  • Page 4: Specifications

    Height measurement includes feet and chassis. All features and specifications are subject to change without notice. Harman Kardon is a trademark of Harman International Industries, Incorporated, registered in the United States and/or other countries. Designed to Entertain is a trademark of Harman International Industries, Incorporated.

  • Page 6: Front Panel Controls

    HK3485 FRONT-PANEL CONTROLS Power Switch: Treble Control: This electrical switch turns the receiver on for Turn the knob clockwise to boost high-frequency playback, or leaves it in Standby mode for quick turn-on using the output by up to 10dB, or counterclockwise to cut high-frequency output remote control.
  • Page 7 HK3485 Treble Balance Tape Source Control Control Message Display Dimmer Selector CD Source Phono Source Video Source Volume Control Selector Selector Sleep Selectors Video 3 Power Mute Tuning Preset Stations Bass Control Audio Inputs Indicator Headphone Preset Scan Tuner...
  • Page 8 HK3485 FRONT-PANEL INFORMATION DISPLAY Mute Auto Tuned Stereo Memory Preset Sleep SPEAKER 1 MUTE AUTO TUNED STEREO PHONO VID 1 MEMORY PRESET SLEEP VID 2 SPEAKER 2 VID 3 TAPE M. Speaker 1/2 Messages Preset Number/ Source Inputs Sleep Timer 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.

  • Page 9: Rear Panel Connections

    HK3485 REAR-PANEL CONNECTIONS AM and FM Antenna Terminals: Main-Amp Inputs and Preamp Outputs: Connect the included AM and These jacks are FM antennas to their respective terminals for radio reception. normally connected directly to each other with an included jumper.
  • Page 10 HK3485 Video 2 Video Video 1 Monitor Remote Inputs Output IR Output FM Antenna Inputs Video 1 Video 3 AC Power Remote Outputs Cord AM Antenna Inputs IR Input Phono Tape Tape Preamp Subwoofer Speaker 2 Switched AC Inputs and...

  • Page 11: Remote Control Functions

    HK 3485 itself. The remote is preprogrammed at the factory to operate to select a preset radio station, or to change tracks or chapters on most Harman Kardon DVD, CD and CDR players. Each time you wish compatible Harman Kardon DVD and CD players.
  • Page 12 HK3485 REMOTE CONTROL FUNCTIONS Auto Preset: preset slots with the same stations. The scan will stop when all 30 presets The Auto Preset feature enables you to automatically set have been filled, or after three scans through the FM band.

  • Page 13: Connections/Installation

    HK3485 CONNECTIONS There are different types of audio and video connections used to connect the receiver to the speakers and video display, and to connect the source devices to the receiver. To make it easier to keep them all straight, the Consumer Electronics Association (CEA ®...

  • Page 14: Video Connections

    HK3485 CONNECTIONS Video Connections Although some sources produce an audio signal only (e.g., CD player, tape deck), many sources output both audio and video signals (e.g., DVD player, cable television box, HDTV tuner, satellite box, VCR, DVR). In addition to the audio connection, you will need to make a video connection for each source.
  • Page 15 Right (Spkr 2) Left (Spkr 2) Left (Spkr 1) The remote is preprogrammed to operate certain Harman Kardon Figure 9 – Speaker Connections components, as shown in Table 2. However, you may connect any Step Two – Connect the Subwoofer...
  • Page 16 Alternatively, you may wish to consider purchasing the Harman Kardon TC 30 activity- based remote control, which is custom-programmed by accessing a vast Internet library of remote control codes for numerous brands and Figure 14 –...
  • Page 17 IR receiver, such front-panel inputs are active. as the optional Harman Kardon HE 1000, to the Remote IR Input jack. If any of your source devices are equipped with a compatible Remote IR...
  • Page 18 HK3485 INSTALLATION connect the HK 3485’s Remote IR Output to the source device’s You may plug two devices into the AC Switched Accessory Outlets on Remote IR Input, which will pass any applicable remote signals trans- the rear of the HK 3485. See Figure 21. Make sure each device draws mitted through the HK 3485 to the source device.

  • Page 19: Operation

    HK 3485 and try to turn it on again, then bring the To temporarily mute all speakers and the headphones, press the Mute receiver to an authorized Harman Kardon service center for assistance. Button on the front panel or remote. See Figure 28. Any recording in To turn the receiver off, press the Power Switch on the front panel, progress will not be affected.

  • Page 20: Using The Tuner

    HK3485 OPERATION NOTES: • The HK 3485 is not an audio/video surround sound receiver. It is only capable of playing source programs in one- or two- channel formats, and any information encoded in additional Figure 30 – Balance Control channels will be lost.
  • Page 21 HK3485 OPERATION To store a station in one of the 30 presets (see Figure 35): 1. Tune the desired station. 2. Press the Memory Button on the remote. 3. Use the Numeric Keys to enter the desired preset number.

  • Page 22: Dim Function

    Mute Button for at least five seconds until the RESET message appears in the display. If the receiver still does not function correctly after a processor reset, contact an authorized Harman Kardon service center for assis- tance. Service centers may be located by visiting our Web site at www.harmankardon.com.

  • Page 23: Troubleshooting Guide

    Power Switch is red due to possible short speaker ends • Amplifier is in Protection mode • Contact your local Harman Kardon service center due to internal problems Unit does not respond to • Weak batteries in remote •...

  • Page 24: Disassembly Procedures

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  • Page 26: Amplifier Bias Adjustment

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  • Page 28: Ic Descriptions/Pinouts

    HK3485 ST72F321R (U-COM) IC81 Figure 1. Device Block Diagram 8-BIT CORE PROGRAM MEMORY (16K - 60K Bytes) RESET CONTROL (512 - 2048 Bytes) WATCHDOG OSC1 OSC2 PA7:0 MCC/RTC/BEEP (8-bits) PORT A PORT F PORT B PF7:0 PB7:0 (8-bits) (8-bits)
  • Page 29 HK3485 2 PIN DESCRIPTION Figure 2. 64-Pin TQFP 14x14 and 10x10 Package Pinout 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 (HS) PE4 SS_1 (HS) PE5 DD_1 PA3 (HS) (HS) PE6...
  • Page 30 HK3485 PIN DESCRIPTION (Cont’d) For external pin connection guidelines, refer to See “ELECTRICAL CHARACTERISTICS” on page 135. Legend / Abbreviations for Table Type: I = input, O = output, S = supply Input level: A = Dedicated analog input In/Output level: C = CMOS 0.3V...
  • Page 31 HK3485 Level Port Main function Input Output Pin Name Alternate function n° (after reset) 24 V Digital Ground Voltage SS_3 Main clock out ADC Analog 25 PF0/MCO/AIN8 I/O C Port F0 Input 8 26 PF1 (HS)/BEEP I/O C Port F1...
  • Page 32 HK3485 Level Port Main function Input Output Pin Name Alternate function n° (after reset) Must be tied low. In flash programming mode, this pin acts as the programming volt- 53 V / ICCSEL age input V . See Section 12.9.2 for more details.
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  • Page 35 HK3485 BLOCK DIAGAM (NJM2296M ) : IC91 Vin1 Vin2 Vout1 6.2dB dirver Vin3 6.2dB Vout2 dirver Vin4 6.2dB Vout3 dirver Vin5...
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  • Page 38 HK3485 TC9164AF (FUNCTION/INPUT) : IC12 BLOCK DIAGRAM L-COM R-COM L-COM R-COM L-COM R-COM DATA SHIFT REGISTER TC9163AF (FUNCTION/INPUT) : IC13 BLOCK DIAGRAM L-COM R-COM L-COM R-COM L-COM R-COM DATA SHIFT REGISTER...
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  • Page 42: Electrical Parts List

    HK3485 HK3485 ELECTRICAL PARTS LIST Ref. Designator Part Number Description PCB, FRONT/HEADPHONE/TONE/VIDEO Capacitors C603,604,605,606 HCQI1H473JZT CAP , MYLAR 0.047UF 50V J C701,702,711~714,C802,817 CCEA1HKS100T CAP , ELECT 10UF 50V KS C703,704,726 HCBS1H101KBT CAP , CERAMIC 100PF 50V K C707, 708...
  • Page 43 HK3485 Ref. Designator Part Number Description PCB, FRONT/HEADPHONE/TONE/VIDEO R713,714 CRD20TJ223T RES , CARBON 22K OHM 1/5W J R715,716,919 CRD20TJ392T RES , CARBON 3.9K OHM 1/5W J R717,718,824 CRD20TJ222T RES , CARBON 2.2K OHM 1/5W J R719,720 CRD20TJ681T RES , CARBON...
  • Page 44 HK3485 Ref. Designator Part Number Description PCB, FRONT/HEADPHONE/TONE/VIDEO JW73 CWZAVR2550JW82 WIRE , ASS'Y RC81 HRVKSM603TH2 REMOCON SENSER KSM-603TH2 X801 HOX04000E150C CRYSTAL , 4MHZ PCB, MAIN CUP11654Y Capacitors C101,102,105,106 CCKT1H101KB CAP , CERAMIC 100PF 50V KB C103,104,117,118,C191~194,301,302 CCEA1VH100T CAP , ELECT...
  • Page 45 HK3485 Ref. Designator Part Number Description PCB, MAIN CUP11654Y Q323,324,333,334,601 HVTKSC2785YT TRANSISTOR NPN KSC2785Y Q331 HKVTKSA1175YT TRANSISTOR PNP KSA1175Y Q603 HVTKTA1271YT TRANSISTOR PNP KTA1271Y Q313,314 HVTKTA1360Y TRANSISTOR , PRE DRIVE, PNP KTA1360Y Q315,316 HVTKTC3423Y TRANSISTOR , PRE DRIVE, PNP...
  • Page 46 HK3485 Ref. Designator Part Number Description PCB, MAIN CUP11654Y R607,608 CRD20TJ123T RES , CARBON 12K OHM 1/5W J R612,613 CRD20TJ560T RES , CARBON 56 OHM 1/5W J R614 CRD20TJ820T RES , CARBON 82 OHM 1/5W J R355,356 CRF5EKR22HX2 RES , CEMENT 0.22OHM(*2), 5W...

  • Page 47: Pcb Drawings

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  • Page 49: Schematics

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  • Page 51: Wiring Diagram

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