Yamaha-APU70-int-sm(1) 维修电路原理图.pdf

AP-U70AP-U70PERSONAL AMPLIFIER100735I CONTENTSTO SERVICE PERSONNEL . 1FRONT PANEL . 2REAR PANELS . 2SPECIFICATIONS . 3INTERNAL VIEW . 4DISASSEMBLY PROCEDURES . 4SELF DIAGNOSIS FUNCTION.5 13STANDARD OPERATION CHART . 14IC DATA .15 24DISPLAY DATA . 25BLOCK DIAGRAM .26 27PRINTED CIRCUIT BOARD .28 35IC BLOCK .36 37SCHEMATIC DIAGRAM .38 39PARTS LIST .40 49REMOTE CONTROL TRANSMITTER. 50PARTS LIST FOR CARBON RESISTORS . 51This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are alreadyknown and understood by the users, and have therefore not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in personalinjury, destruction of expensive components, and failure of the product to perform as specified. For thesereasons, we advise all YAMAHA product owners that any service required should be performed by anauthorized YAMAHA Retailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any individual or firm does not constitute authorization, certificationor recognition of any applicable technical capabilities, or establish a principle-agent relationship of anyform.The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, andservice departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore,inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist,please contact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may haveaccumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to thisbuss).IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to theunit.IMPORTANT NOTICEAP-U70SERVICE MANUALRadioFans.CN 收音机爱 好者资料库AP-U70AP-U70I TO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked Zand must be replaced with parts having specifications equalto those originally installed.2. Leakage Current Measurement (For 120V Models Only)When service has been completed, it is imperative to verifythat all exposed conductive surfaces are properly insulatedfrom supply circuits.GMeter impedance should be equivalent to 1500 ohm shuntedby 0.15F.GLeakage current must not exceed 0.5mA.AC LEAKAGETESTER OREQUIVALENTEQUIPMENTUNDER TESTINSULATINGTABLEWALLOUTLET1WARNING: CHEMICALCONTENT NOTICE!The solder used in the production of this productcontains LEAD. In addition, other electrical/electronic and/or plastic (where applicable)components may also contain traces of chemicalsfound by the California Health and WelfareAgency (and possibly other entities) to causecancer and/or birth defects or other reproductiveharm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS INYOUR MOUTH FOR ANY REASONWHATSOEVER!Avoid prolonged, unprotected contact betweensolder and your skin! When soldering, do notinhale solder fumes or expose eyes to solder/fluxvapor!If you come in contact with solder or componentslocated inside the enclosure of this product, washyour hands before handling food.GBe sure to test for leakage with the AC plug in bothpolarities.“CAUTION”“F1 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 2.5A, 125V FUSE.”CAUTIONF1 : REPLACE WITH SAME TYPE 2.5A, 125V FUSE.ATTENTIONF1 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 2.5A, 125V.A VRadioFans.CN 收音机爱 好者资料库AP-U70AP-U702I FRONT PANELM U, C modelsI REAR PANELSM A modelM B, G modelsAP-U70AP-U703I AUDIO SECTIONMinimum RMS Output Power per ChannelStereo, 20Hz to 20kHz, 0.8% THD, 6 . . . . . 20W+20WMaximum Power per ChannelStereo, 1kHz, EIAJ, 10% THD, 6 . . . . . . . . . 26W+26WInput Sensitivity/ImpedancePC, AUX 1, AUX 2 (Analog) . . . . . . . . . . . . 150mV/35kMaximum Input Signal LevelPC, AUX 1, AUX 2, 1kHz (DSP= THRU) . . . . . . . . . 2.1VOutput Level/ImpedanceREC OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . 130mV/2.0kSUB WOOFER (50Hz) . . . . . . . . . . . . . . . . . . . . . .2.0V/1.7kHeadphone Jack Rated Output/ImpedancePC Analog Input, etc (1kHz, 150mV) . . . . . . 320mV/61Frequency ResponseUSB20Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.0+1.0/-1.0dB1kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0dB20kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5+1.0/-1.0dBPC, AUX Digital Input20Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.0+1.0/-1.0dB1kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+0/-0dB20kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5+1.0/-1.0dBTotal Harmonic Distortion (1kHz, 20k LPF)USB to SP OUT (4V/6) . . . . . . . . . . . . . . . . . . . . . 0.06%PC, AUX Digital Input to SP OUT (4V/6) . . . . . . . 0.06%Signal-to-Noise Ratio (IHF-A-Network)USB to SP OUT (11V/6) . . . . . . . . . . . . . . . . . . . . . 85dBPC, AUX Digital Input to SP OUT (11V/6) . . . . . . . 90dBResidual Noise (IHF-A-Network)MAIN L/R SP OUT . . . . . . . . . . . . . . . . . . . . . . . . . -68dBVI SPECIFICATIONSI GENERALPower SupplyU, C models . . . . . . . . . . . . . . . . . . . . . . . AC 120V, 60HzA model . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 240V, 50HzB, G models . . . . . . . . . . . . . . . . . . . . . . . AC 230V, 50HzPower ConsumptionU, C, B, G models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60WA model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55WStandby Power Consumption . . . . . . . . . . . . . . . . . . . . . 5WDimensions (W x H x D) . . . . . . . . . . . . . 120 x 294 x 355mm(4-11/16” x 11-9/16” x 13-15/16”)Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 kg (12 lbs 2oz)Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Silver colorAccessories . . . . . . . . . . . . Remote Control Transmitter x 1Battery (size AA, R06) x 2USB Cable x 1CD ROM x 1* Specifications subject to change without notice.Manufactured under license from Dolby Laboratories.Dolby, AC-3, Pro Logic, and the double-D symbol Vare trademarks of Dolby Laboratories. 1992-1997 DolbyLaboratories. All rights reserved.Manufactured under license from Digital Theater Systems,Inc. US Pat. No. 5,451,942 and other world-wide patentsissued and pending. DTS, DTS Digital Surround, aretrademarks of Digital Theater Systems, Inc. copyright1996 Digital Theater Systems, inc. All rights reserved.U . . . . . . . . . . USA modelC . . . . . .Canadian modelA . . . . . Australian modelB . . . . . . . . British modelG . . . . . European modelG DIMENSIONSUnits : mm (inch)120 (411/16)85 (35/16)355 (1315/16)253 (915/16)13.5 (1/2)13 (1/2)294 (119/16)281 (111/16)283 (111/8)AP-U70AP-U704I INTERNAL VIEWI DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.)1. Removal of Top CoverRemove 14 screws ( q and w ) and then remove theTop Covers in Fig. 1.qDSP P.C.B.wMAIN P.C.B.eOPERATION (1) P.C.B.rOPERATION (2) P.C.B.qwer2. Removal of Front PanelRemove 6 screws ( e ) and then remove the FrontPanel in Fig. 2.3. Checking the DSP P.C.B.Remove 4 screws ( r ) and then remove the ShieldCase in Fig. 2.Fig. 2Fig. 1wqqqqqqeerTop Cover (R)rFront PanelShield CaseTop Cover (L)Top CoverThe shield case can be removed only byloosening these 2 screws marked (r).AP-U70AP-U705I SELF DIAGNOSIS FUNCTIONThis product has a built-in self diagnosis function (DIAG) that can be used for inspection, measurement anddetermination of a faulty point, if any.There are ten menu items, each of which has a number of sub menu items.Listed below are these menu items and sub-menu items.Main menuALL (Sequential test)DEV (Device test)DSP (DSP test)FL (FL test)AD (AD test)USB (USB loop back test)INIT (Memory initialization)VER (Version information)ERROR (Error history)Sub menu1. THROUGH2. DELAY3. HALL4. JAZZ5. CHURCH6. GAME7. MOVIE8. LIVE9. PC-ANA10. PC-Digi11. AUX1-A12. AUX1-D13. AUX2-A14. RETURN1. AUTO2. MANUAL3. RETURN1. KEY2. LEVEL3. JUDGE4. V-ERR5. V-MAX6. V-MID607. V-MID558. V-MID529. V-MID4910. V-MID2911. V-MID112. V-MIN13. RETURN1.START2. STOP3. RETURN1. MEMORY2. CANCEL3. RETURN1. SHV2. EGAV3. ChckSum4. RETURN1. E0-2. E1-3. E2-4. E3-5. E4-6. E5 -7. E6-8. E7-9. CLEAR10. RETURNNo.123456789Main menuDIT (Digital interface)EXITSub menu1. GENERAL2. CD3. PCM Enc4. DAT5. BS JPN6. Synthe7. AD8. SD9. BS Eur10. MIXER11. SFC12. DSP13. L Pa:Ch14. DIR RV15. RETURNNo.100AP-U70AP-U706G Starting DIAGWhile the opening message appearing at the power ON is on display, press the “DSP” key 3 times; quickly atthe first and second times and keep pressing it at the third time until the DIAG function is started.G Display when DIAG function is startedFirst, “DIAG” appears on the FL display of the main unit, followed by the version of themicrocomputer for 1 second (e.g., 1.000f), the checksum of the microcomputer for 2 seconds(e.g., 7720) and finally the DIAG menu (e.g., 1: ALL). Also, all the function LED segments lightup.Version of the microcomputerChecksum of microcomputerD I A G1 . 0 0 0 f7 7 2 01 :A L L1 secondlater2 secondslaterDIAG started(*1) When there is a history of the protection functionrecorded, the type of the last protection function in therecord appears.When there is no protection function history (*1)Some secondslaterDIAG menuAP-U70AP-U707When the protection function works and the power is turned off after DIAG was startedWhen the protection function (*2) works, its history appears in the abbreviated form as described below andthe power turns off. Correct the failure based on the history of the protection function.(*2) When an excessive current or something abnormal in the power source, DC, etc. is detected, the poweris forced to turn off as a protection function.AmpPt I display(Turning on the power without solving the problem causes the protectionfunction to work at that moment and the power turns off immediately.)Possible cause: An excessive electric current flow to the power amplifierSupplementary information: The current of the power IC (IC9) isdetected.PT PS display(Turning on the power without solving the problem causes the protectionfunction to work at that moment and the power turns off. If the trouble isin the power supply related to the display, display may disappear.)Possible cause: An abnormality in the power supply section (voltage)Supplementary information: As the following power supply is detected,the faulty point can be identified.Transformer secondary windingRE X 2(CB10)Stabilizing power source15A, +9V, +5A, +5D SW, -VPAmpPtDc display(Turning on the power without solving the problem causes the protectionfunction to work at that moment and the power turns off.)Possible cause: DC output of the power amplifier detected.Besides the above possible causes, the cause may be disconnection of the connector, an error around CPU, etc.G History of protectionWhen the protection function has worked, its history is stored in the backup memory. Even if no abnormality is found while servicing,the abnormality the user experienced can be identified by using the data in the backup memory.The recorded history of the protection function is cleared when the DIAG function is cancelled by setting DIAG menu No.7 INIT to“MEMORY” (memory initialization) or when the backup memory is erased.AP-U70AP-U708G Canceling DIAGThere are two methods to cancel the DIAG function.1) Press the “POWER” (STANDBY) key of the main unit or the “POWER” (STANDBY) key of the remote controller toenter the stand-by state.2) Selecting the DIAG menu item 0. EXIT, cancel the DIAG function. Then the self-diagnosis process ends and thenormal operation is restored.CAUTION: Prior to cancellation of the DIAG function, be sure to execute setting of DIAG menu 7. INIT (reserve /reserve cancel of memory initialization). (To keep the user memory, execute “CANCEL” (cancellation of resettingreservation) of 7. INIT setting before canceling the DIAG function.)G Operation procedure of DIAG menu and SUB-MENU1) Use the UP w (forward) / DOWN q (reverse) keys to select a main menu item.2) In case of main menu items 1. ALL and 2. DEV neither of which has sub menu, themenu item is executed when the DSP key is pressed.3) In case of main menu items which have sub menu, the sub menu appears when theDSP key is pressed.4) Use the UP w (forward) / DOWN q (reverse) keys to select a sub-menu item.5) The sub-menu item is executed when the DSP key is pressed.6) To return from the sub-menu to the main menu, have “RETURN” displayed by usingthe UP w (forward) / DOWN q (reverse) keys and press the DSP key.7) To return to the DIAG initial setting (1.ALL) during DIAG operation, press the MUTEkey except for the special case (*3).(*3) : It is not possible to return to 1.ALL during execution of the AD test.Main unitUP w (forward)DOWN q (reverse)DSPMUTERemote control keyVOLUME UP w (forward)VOLUME DOWN q (reverse)ON/OFF- (operation unavailable)Remote control code7B-0D7B-0E7B-07-When using remote controllerG Functions during DIAG operationFollowing functions are available even during the DIAG operation. Power ON/OFF Master volumeAP-U70AP-U709Details of DIAG menuDisplaybit76540000010001Display0 00 0 0 00 0 0 0bit7 6 5 43 2 1 0Displaybit321000000100012001030011401005010160110701118100091001A1010B1011C1100D1101E1110F1111bit7Unused (“0” usually)bit6Unused (“0” usually)bit5Unused (“0” usually)bit4Checks checksum of IC438 (ROM) (0: OK / 1: NG)bit3Checks IC447 (RAM) (0: OK / 1: NG)bit2Checks register Read/Write of IC430 (USS820) (0: OK / 1: NG)bit1Checks register Read/Write of IC417 (YSS928) (0: OK / 1: NG)bit0Checks register Read/Write of IC475 (LC27287B) (0: OK / 1: NG)1. ALL (Sequential test)This menu is used to execute major five items of the DIAG menu. The items are as follows.(Set the volume level to the intermediate value before execution.)Press the DSP key to advance one step to the next item.To skip a step, press the MUTE key.(To end the DIAG function during the AD test of Step 5, keep pressing the DSP key for a long period of time.)1. Device test (DEVICE) . . . . . . . . . . . . . . . . . . . . . . . . .page 92. DEV2. DSP test (THROUGH) . . . . . . . . . . . . . . . . . . . . . . . .page 103. DSP3. DSP test (DELAY) . . . . . . . . . . . . . . . . . . . . . . . . . . .page 103. DSP4. FL test (Automatic FL change) . . . . . . . . . . . . . . . . .page 104. FL5. AD test (KEY reception test) . . . . . . . . . . . . . . . . . . .page 115. ADThe AD test checks if pressing of each key is received properly or not.Press the key in the order of USB, PC, AUX1, AUX2, DSP, MUTE, DOWN (q) and UP (w).For the details of Steps 1 through 5, refer to the