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 Freewww.freeservicemanuals.infoRadioFans.CN 收音机爱 好者资料库Eachprecautioninthismanualshouldbefollowedduringservicing.Components identified with the IEC symbolin the pa

4、rts 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 theparts list in this manual. Leakage-current or resistance measurements must b

5、e made to determine that exposed parts are acceptablyinsulated 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 calledElectrostatically Sensitive (ES) Devices. Exampl

6、es of typical ES devices are integrated circuits and some field effect transistors andsemiconductor 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 semi

7、conductor-equipped assembly, drain off any electrostatic charge onyour 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. A

8、fter removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, toprevent 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 s

9、older removal device. Some solder removal devices not classified as anti-static can generate electrical chargessufficient 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 i

10、ts protective package until immediately before you are ready to install it. (Most replacementES 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

11、a replacement ES device, touch the protective material to thechassis 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 unpackaged replacement ES devices.

12、 (Otherwise harmless motion such as the brushing togetheror 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 Freewww.freeservicemanuals.infoRadio

13、Fans.CN 收音机爱 好者资料库21. Inspect all lead dress to make certain thatleads are not pinched or that hardware is notlodged between the chassis and other metalpartsintheunit.2. Be sure that any protective devices such asnonmetallic control knobs, insulating fish-papers,cabinetbacks,adjustmentandcompartment

14、 covers or shields, isolationresistor-capacitynetworks,mechanicalinsulators, etc. Which were removed for theservicingareproperlyre-installed.Before returning the unit to the user, perform the following safety checks :3. Be sure that no shock hazard exists ; check for leakagecurrentusingSimpsonModel2

15、29LeakageTester,standardequipment item No. 21641, RCA Model WT540A or usealternate method asfollows : Plug the power cord directlyInto a 120 volt AC receptacle (do not use an IsolationTransformer for this test). Using two clip leads, connect a1500ohms,10wattResistorparalleledbya0.15uFcapacitor,inser

16、ieswithallexposedmetalcabinetpartsandaknownearthground,suchas 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 theresistor. (See diagram) Move the resistor connection to each exposed metal part having a return path to the

17、 chassis (antenna, metal,cabinet,screwheads,knobsandcontrolshafts,escutcheon,etc.)andmeasuretheACvoltagedropacrosstheresistor.(Thistestshouldbeperformedwiththe0.35voltRMSormoreisexcessiveandindicatesapotentialshockhazardwhichmustbecorrectedbeforereturningtheunittotheowner.AVR525AVR525 harman/kardon

18、www.freeservicemanuals.infoIts Freewww.freeservicemanuals.info34AVR 525 TECHNICAL SPECIFICATIONSAudio SectionStereo Mode Continuous Average Power (FTC)85 Watts per channel, 20Hz20kHz, 0.07% THD, both channels driven into 8 ohmsSeven-Channel Surround Modes Power per Individual ChannelFront L&R channe

19、ls:70 Watts per channel 0.07% THD, 20Hz20kHz into 8 ohmsCenter channel:70 Watts 0.07% THD, 20Hz20kHz into 8 ohmsSurround (L & R Side, L & R back) channels:70 Watts per channel adjusting VR71, check P801 to 23mV +2mV/- 1mV. Surr Left adjusting VR73 check P803 to 23mV +2mv/-1mV. Front Right adjusting

20、VR74 check P804 to 23mV +2mV/-1mV. Surr Right adjusting VR72 check P802 to 23mV +2mV/-1mV.P801 FRONT L-CHP803 SURROUND L-CHAVR525AVR525 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoVR71 FRONT L-CH VR73 SURROUND L-CHP804 FRONT R-CHP802 SURROUND R-CHAVR525AVR525 harman/k

21、ardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.infoVR74 FRONT R-CH VR72 SURROUND R-CHAVR525AVR525 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.info2. BACK SURROUND BD : 5 Min. After power on, please set up Bias as below, SBL adjusting VR31 check P301 to 23

22、mV +2mv/-1mV. Center adjusting VR41 check P308 to 23mV +2mV/-1mV. SBR adjusting VR51 check P309 to 23mV +2mV/-1mV. P301 VR31 BACK SURROUND L-CH VR41 P308 CENTER-CHAVR525AVR525 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.info P309 VR51 BACK SURROUND R-CHAVR525AVR525 harman

23、/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.info harman/kardon Service Bulletin Service bulletin # H/K2003-05 Sept. 2003 Warranty labor rate: MAJOR repair To: All harman/kardon Service Centers Model: AVR325/AVR525 Subject: Software Upgrade A software upgrade is possible for the

24、 sub Micro CXP82852-375Q (IC12) in models AVR325 and AVR525; 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 center channels, may ge

25、nerate 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. If the settings are

26、 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, (CXP82852-375Q) order

27、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 IC12 to prevent damage.

28、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 up and out of the unit

29、. 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 and replace IC12; See d

30、rawing. 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 Affected Dolby Digital Ex

31、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 Freewww.freeservicemanuals.info harman/kardon Service Bulletin

32、 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 with the complaint: “the unit intermittently goe

33、s 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 PCB, surround PCB. Recheck all bias voltages. 1

34、) 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 AVR325,525 SURROUND PCB Location: P307, P310All mode

35、ls BIAS PCB Location: P812, P813, P814, P815, P816 AVR525AVR525 harman/kardon www.freeservicemanuals.infoIts Freewww.freeservicemanuals.info 4) Unplug each the cable on the Bias PCB, desolder the female plugs, cut the connectors off each wire, strip the insulation 1/8” on each end and solder directl

36、y 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 each wire, strip the insulation 1/8” on each end and solder directly to th

37、e 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 connector off each wire, strip the insulation 1/8” on each end, slide a pi

38、ece 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 PCB. AVR525AVR525 harman/kardon www.freeservicemanuals.infoIts Freewww.f

39、reeservicemanuals.info 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/SURROUND Board) Specialized equipment/parts needed: Variable AC transformer (“Variac” type) to ad

40、just 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 (120v model) or 230V/50Hz (230v model) After turning the unit ON for 25 minutes or more to keep the

41、 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 located on the main PCB just below the Bias PCBs. To guide/seat the two pin harness plug into the socke

42、ts, 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 P804 23mV 2mV SURROUND L CHAN VR73 P803 23mV 2mV SURROUND R CHAN VR72 P802 23mV 2mV SURROUND BACK A

43、MP 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 connector to the specified value by rotating the variable resistors. AVR325-525: VR31,41,51 and P

44、301,308,309 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 VR41 P308 CENTER AVR430-630 VR32 P308 23mV 2mV SURROUND BACK L VR31 P301 23mV 2mV SURROUND BACK R

45、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 necessary. 11) Replace the top cover and test the unit. Model Serial Number (120v) Serial Number

46、 (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 may run continuously Hard wire bias cables to PCBs AVR430 TF0001-01000 to TF0001-08116 TF0006-010

47、00 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 to TF0002-11138 TF0007-01000 to TF0007-05650 Unit may shut down or fan may run continuously Hard

48、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 Freewww.freeservicemanuals.info harman/kardon TECH TIPSTECH TIPS Troubleshooting tips and solutions to common service problems For

49、 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 DPR2005 HK3370/3470/3375/3475 HK3250 TIP# HKTT2003-01 Rev5 Subject: Backup Memory on AVR/DPR/HK series receivers In the even

50、t 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: Model Designator Location Description Part number AVR10 C712 D709 Front PCB 0.047 Farad 5.5v capacitor and 1N4148 diode