HarmanKardon-AVR525-avr-sm维修电路原理图.pdf

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1、 harman/kardon AVR525 AVR525 A/V DOLBY DIGITAL RECEIVER SERVICE MANUAL CONTENTS ESD WARNING.2 LEAKAGE TESTING.3 BASIC SPECIFICATIONS.4 FRONT PANEL CONTROLS.5 FRONT PANEL DISPLAY.7 REAR PANEL CONNECTIONS.8 REMOTE CONTROL FUNCTIONS.11 INSTALLATION AND CONNECTIONS.14 TROUBLESHOOTING GUIDE.17 PROCESSOR

2、RESET.17 BLOCK DIAGRAM.18 AMPLIFIER BIAS ADJUSTMENT.19 SERVICE BULLETIN # H/K2003-05.24 SERVICE BULLETIN # H/K2004-04.25 TECH TIP HKTT2003-01.28 TECH TIP HKTT2004-03.29 EXPLODED VIEW.33 EXPLODED VIEW PARTS LIST.34 ELECTRICAL PARTS LIST.36 PCB DRAWINGS.92 SEMICONDUCTOR PINOUTS.104 SCHEMATICS.167 WIRI

3、NG DIAGRAM.186 PACKAGE.187 harman/kardon, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev2 8/2005 www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFans.CN 收音机爱 好者资料库 Eachprecautioninthismanualshouldbefollowedduringservicing. Components identified with the IEC symbolin th

4、e 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

5、must be made to determine that exposed parts are acceptably insulated from the supply circuit before retuming the product to the customer. Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Device

6、s. 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 compo

7、nent 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 u

8、nder 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 onl

9、y 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 replace

10、ment 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 mate

11、rial 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. Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackag

12、ed 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. CAUTION : AVR525AVR525 harman/kardon www.freeservicemanuals.infoIts Free ww

13、w.freeservicemanuals.info RadioFans.CN 收音机爱 好者资料库 2 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 partsintheunit. 2. Be sure that any protective devices such as nonmetallic control knobs, insulating fish- paper

14、s,cabinetbacks,adjustmentand compartment covers or shields, isolation resistor-capacitynetworks,mechanical insulators, etc. Which were removed for the servicingareproperlyre-installed. Before returning the unit to the user, perform the following safety checks : 3. Be sure that no shock hazard exists

15、 ; check for leakage currentusingSimpsonModel229LeakageTester,standard equipment item No. 21641, RCA Model WT540A or use alternate method asfollows : 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 1500oh

16、ms,10wattResistorparalleledbya0.15uFcapacitor,inserieswithallexposedmetalcabinetpartsandaknownearthground,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 t

17、o each exposed metal part having a return path to the chassis (antenna, metal, cabinet,screwheads,knobsandcontrolshafts,escutcheon,etc.)andmeasuretheACvoltagedropacrosstheresistor.(Thistestshouldbe performedwiththe0.35voltRMSormoreisexcessiveandindicatesapotentialshockhazardwhichmustbecorrectedbefor

18、ereturningthe unittotheowner. AVR525AVR525 harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFans.CN 收音机爱 好者资料库 3 4 AVR 525 TECHNICAL SPECIFICATIONS Audio Section Stereo Mode Continuous Average Power (FTC) 85 Watts per channel, 20Hz20kHz, 0.07% THD, both channels dri

19、ven into 8 ohms Seven-Channel Surround Modes Power per Individual Channel Front L units without the upgrade may exhibit the following symptoms: 1) Dolby Digital EX mode only, Delay adjustment, any speaker size selected: Adjusting the delay time at 14 feet or greater for surround back, surround or ce

20、nter channels, may generate a distortion (like a feedback signal) from the subwoofer output. Lowering the delay level below 14 feet eliminates the distortion. 2) The Triple Crossover feature: Settings allow a different crossover point to be used for the front left/right, center and surround speakers

21、. If the settings are not configured properly, the user could actually create a frequency notch and “cut out” certain bass frequencies, or, over-enhance bass frequencies by overlapping the X-Over points. (NOTE: It would be a rare occurrence where symptom #2 would generate a complaint) AVR325 IC12, (

22、CXP82852-375Q) order and replace with h/k part # 55646260 (CXP82860-390Q). AVR525 IC12, (CXP82852-377Q) order and replace with h/k part # 55645960 (CXP82860-391Q). WARNING: FOLLOW PROPER STATIC CONTROL PROCEDURES and use caution during the removal of the DSP board, and during installation of new IC1

23、2 to prevent damage. Sub Micro CXP82852-375Q (IC12) is on the DSP board. Remove top cover, Processor board, all Molex connectors and rear screws necessary to access DSP board. Disengage both Processor and DSP PCB from the rear PCB connector by pushing back on the rear board; lift the Processor PCB u

24、p and out of the unit. Not all connectors need to be removed when enough connectors are unplugged, the Processor PCB can be lifted out of the way to access the DSP board. Disengage the DSP PCB from its rear connector by pushing back on the rear PCB; lift the DSP PCB up and out of the unit. Locate an

25、d replace IC12; See drawing. After replacement, replace all connectors and screws. CAUTION: At the rear screws, if using a power tool, use care and minimum force to avoid damaging the various plastic receptacles. Test the unit. Model Serial Number (120v) Status Action AVR325 All Serial Numbers Affec

26、ted Dolby Digital Ex Mode Delay Adjustment Oscillation; Triple Crossover Change IC12 AVR525 All Serial Numbers Affected Dolby Digital Ex Mode Delay Adjustment Oscillation; Triple Crossover Change IC12 AVR525AVR525 harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFan

27、s.CN 收音机爱 好者资料库 harman/kardon Service Bulletin Service bulletin # HK2004-04 Rev1 August 2005 Warranty labor rate: MAJOR repair To: All harman/kardon Service Centers Model: AVR325, AVR525, AVR430, AVR630 Subject: Rewiring Bias/Fan cables In the event you receive an AVR325, AVR525, AVR430 or AVR630 wi

28、th the complaint: “the unit intermittently goes in standby or the fan runs constantly” perform the following modification. Please note other component or connection failures can cause the unit to go in to standby. Synopsis: Hard wire Bias/Fan cables (7 cables, 12 connectors) from Bias PCBs to main P

29、CB, surround PCB. Recheck all bias voltages. 1) Remove the top cover 2) Remove the DSP and Processor boards. 3) Locate and identify Bias cables connecting Bias and Surround PCBs to main PCB: All models MAIN PCB Location: P805, N801, N802, N803, N804 AVR430,630 SURROUND PCB Location: N301,P307 AVR325

30、,525 SURROUND PCB Location: P307, P310 All models BIAS PCB Location: P812, P813, P814, P815, P816 AVR525AVR525 harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFans.CN 收音机爱 好者资料库 4) Unplug each the cable on the Bias PCB, desolder the female plugs, cut the connectors

31、 off each wire, strip the insulation 1/8” on each end and solder directly to the PCB assembly in each location. 5) For locations N801, N802, N803, N804 on the Main PCB, set the unit on its side and remove the bottom grille. (See Figure 2) Desolder and remove each connector. Cut the connectors off ea

32、ch wire, strip the insulation 1/8” on each end and solder directly to the PCB assembly in each location. 6) For location P805 (see Figure 1) on the Main PCB, unplug the cable, carefully cut away the female plug with diagonal cutters on the PCB surface, leaving the three conductors intact. Cut the co

33、nnector off each wire, strip the insulation 1/8” on each end, slide a piece of shrink tubing on each conductor and solder each wire directly to the three conductors on the PCB. Heat the shrink tubing to complete the connection, and add some silicon seal or similar adherent to affix the wires on the

34、PCB. AVR525AVR525 harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info RadioFans.CN 收音机爱 好者资料库 7) Replace the DSP and Processor boards 8) Recheck all bias voltages, following the instructions below: MAIN AMP IDLE CURRENT ADJUSTMENT PROCEDURE (Set variable resistors for MAIN/

35、SURROUND Board) Specialized equipment/parts needed: Variable AC transformer (“Variac” type) to adjust and monitor AC line voltage. Two pin harness plug to connect DMM to idle current test points, hk part# 55212910NR or equivalent Conditions: No Signal; No Load AC Line Voltage adjust to: 120V/60Hz (1

36、20v model) or 230V/50Hz (230v model) After turning the unit ON for 25 minutes or more to keep the Power/Driver TR at normal temperature, adjust the DC voltage at the two pin connector to the specified value by rotating the variable resistors. VR71-74 are located on the Bias PCBs. P801-804 are locate

37、d on the main PCB just below the Bias PCBs. To guide/seat the two pin harness plug into the sockets, you may have to attach the harness wire to a long blade screwdriver as P801-803 are in a deep recess. CHANNEL ADJUSTMENT MEASUREMENT POINT VOLTAGE FRONT L CHAN VR71 P801 23mV 2mV FRONT R CHAN VR74 P8

38、04 23mV 2mV SURROUND L CHAN VR73 P803 23mV 2mV SURROUND R CHAN VR72 P802 23mV 2mV SURROUND BACK AMP IDLE CURRENT ADJUSTMENT PROCEDURE Same conditions as above. After turning the unit ON for 25 minutes or more to keep the Power/Driver TR at normal temperature, adjust the voltage value at the two pin

39、connector to the specified value by rotating the variable resistors. AVR325-525: VR31,41,51 and P301,308,309 are located at the center of the Surround PCB AVR430-630: VR31,32,51 and P301,308,309 are located at the top edge of the Surround PCB CHANNEL ADJUSTMENT MEASUREMENT POINT VOLTAGE AVR325-525 V

40、R41 P308 CENTER AVR430-630 VR32 P308 23mV 2mV SURROUND BACK L VR31 P301 23mV 2mV SURROUND BACK R VR51 P309 23mV 2mV 9) After 5 minutes, check all voltages again at measurement points and re-adjust if necessary. 10) After more 5 minutes, check all voltages again at measurement points and re-adjust if

41、 necessary. 11) Replace the top cover and test the unit. Model Serial Number (120v) Serial Number (230v) Status Action AVR325 All serial numbers affected n/a Unit may shut down or fan may run continuously Hard wire bias cables to PCBs AVR525 All serial numbers affected n/a Unit may shut down or fan

42、may run continuously Hard wire bias cables to PCBs AVR430 TF0001-01000 to TF0001-08116 TF0006-01000 to TF0006-06663 Unit may shut down or fan may run continuously Hard wire bias cables to PCBs AVR430 TF0007-08117 and above TF0007-06664 and above Modified by Factory None Required AVR630 TF0002-01000

43、to TF0002-11138 TF0007-01000 to TF0007-05650 Unit may shut down or fan may run continuously Hard wire bias cables to PCBs AVR630 TF0002-11139 and above TF0007-05651 and above Modified by Factory None Required AVR525AVR525 harman/kardon www.freeservicemanuals.infoIts Free www.freeservicemanuals.info

44、RadioFans.CN 收音机爱 好者资料库 harman/kardon TECH TIPSTECH TIPS Troubleshooting tips and solutions to common service problems For models: AVR7000/7200/7300/8000 AVR100/200/300/500 AVR110/210/310/510 AVR120/220/320/520 AVR125/225/325/525 AVR130/230/330/430/630 AVR135/235/335/435/635 AVR10 DPR1001 DPR1005 DP

45、R2005 HK3370/3470/3375/3475 HK3250 TIP# HKTT2003-01 Rev5 Subject: Backup Memory on AVR/DPR/HK series receivers In the event of the complaint: “the receiver is losing its memory (any programmed system settings) when the unit is turned off, or after the unit is unplugged (briefly*)”: Check and replace

46、: Model Designator Location Description Part number AVR10 C712 D709 Front PCB 0.047 Farad 5.5v capacitor and 1N4148 diode #3439247315 #2058322101 AVR7000 C730 Front PCB 0.047 Farad 5.5v capacitor # P10790-ND or # J3432147324X AVR7200 C106 Front PCB 0.047 Farad 5.5v capacitor # P10790-ND AVR7300 C657

47、 DSP PCB 0.047 Farad 5.5v capacitor # H01-CEZXA0479MN-5 AVR8000 C726 Front PCB 0.047 Farad 5.5v capacitor # 55230310NR or # P10790-ND AVR100/200 C412 Front PCB 0.047 Farad 5.5v capacitor # CEGT-B473J-0J0 AVR300 C906 Front PCB 0.1Farad 5.5v capacitor # J4433210421X or # P10791-ND AVR500 C906 Front PC

48、B 0.1Farad 5.5v capacitor # J4433210421X or # P10791-ND AVR110/210/310/510 AVR120/220/320/520 C216 Front PCB 0.047 Farad 5.5v capacitor # P10790-ND AVR125/225 C734,C885 Front PCB two 0.1F capacitors in parallel # BCESOHD104 AVR325/525 C106 Front PCB 0.047 Farad 5.5v capacitor # P10790-ND AVR130/230/330 BAT1 Front PCB 3.6v Battery # HABGP40BVH3A3H AVR135/235/335 BAT1 Front PCB 3.6v Battery # HGP15BNH3A3H AVR430/630 C657 DSP PCB 0.047 Farad 5.5v capacitor # CEZXA0479MN-5 AVR4