Marantz-SR7300-avr-sb 维修电路原理图.pdf

Approved by H.TAMURAWritten by K.ONOWQ-19 2 817/additional rule3 (1st Issue 2003-03-19)Date:15-May-2003Model SR7300Page:1/1REF.NBR:MZ03-003Circulation:Application:Subject:Int.ref: PHENOMENONBroken Volume or Selector knob by transportation.REASONSA clearance between the front panel and knob were a little large and get stress to the volume shaft.SOLUTIONAdd the spacer to the front panel as follows.( Spacer : parts No. 03AJ118010)REMARKSThis improvement has been done in the production line after the LOT number 14 and later(The LOT number is # of serial number MZxxxxxx#xxxx.)SERVICE BULLETIN Broken Knobx for informationcustomer complaintin case of servicemandatory.MZxxxxxx01xxxxtoMZxxxxxx13xxxxSpacer Parts# 03AJ118010)Peel off the sheetStick the spacer and push it strongly.RadioFans.CN 收音机爱 好者资料库Approved by H.TAMURAWritten by K.ONOWQ-19 2 817/additional rule3 (1st Issue 2003-03-19)Date:15-May-2003ModelSR7300Page:1/2REF.NBR:MZ03-006Circulation:Application:Subject:Int.ref: PHENOMENONHigh tone noise can be heard a little from speaker.SOLUTIONPlease apply the modification of Solution 1 and Solution 2 to the units Lot 01 to Lot 15.Please apply the modification of Solution 2 to the units Lot 16 and after. (Solution 1 has already applied to the unitslot 16 and later.)* The lot number is mentioned in the Serial number label on the rear panel.( ex. MZxxxxxx01xxxx : 01 lot)Solution 1 ( For lot 01 to 15)1) Cut a jumper wire U304 on the PS04 board.2) Add a capacitor between the pin 3 of the Q681 and the “-“side of the CU80 as follows.SERVICE BULLETIN Improvement of high tone noisex for informationcustomer complaintin case of servicemandatory.ALLCut the Jumper wire U304Solder to the pin 3 of Q681Add and solder a capacitor1000uF/16v.Solder “+” side of the capacitor tothe pin 3 of Q681. And “-“ side tothe CU80( “-“ side )Add tube and fix the cap by glue.Solder to the “-“ side of CU80RadioFans.CN 收音机爱 好者资料库Approved by H.TAMURAWritten by K.ONOWQ-19 2 817/additional rule3 (1st Issue 2003-03-19)MZ03-006 Page 2/2Solution 2 ( For all lot)1) Add a wire (Length approx. 23cm : Wire size #18 or #20) as follows. (GND to GND)Note: Wiring must be done as following and fixed by glue (burn-resistant type).Add 23cm wireSolder to GND plateSolder to GND pinApproved by S.NAGAO Written by WQ-19 2 817/additional rule 3 (1st Issue 2003-03-19)Date:15-May.-2003Model: SR7300,SR6300Page:1 / 1REF.NBR:MZ03-018Circulation:Application:Subject:Int.ref:PHENOMENONWhen learning and memorizing the remote control codes used by Set-top Box of Time Warner Inc.,A part of cursor button cant be learned. SOLUTIONRC7300SR is exchanged for the improvement the remote controller RC7300SRa.NECESSARY PARTImprovement the remote controller part no. ZK03AJ0012(SR6300: old remote controller part no. ZK15AW0010 FACTORY PART NO.8300030010010)(SR7300: old remote controller part no. ZK03AJ0010)REMARKSThe countermeasure apply to this claim only.This solution has already been applied in the production line afterthe Lot number “MZxxxxxx27xxxx” and later.The production of SR6300 has been finished.SERVICE BULLETIN The problem that the remote controller cant lean other the remote controller .x for information customercomplaint in case of servicemandatory. See BelowModel name RC7300SRaApproved by S.NAGAO Written by WQ-19 2 817/additional rule 3 (1st Issue 2003-03-19)Date: 10-July-2003 Model: SR7300.SR7300FPage:1 / 1REF.NBR:MZ03-030Circulation:Application:Subject:Int.ref:PHENOMENONThe change of CPUs software. The specifications of the Set become the same as SR9300.SOLUTION1. Update the CPU(QU01) firmware version to “ V030502_1 ”2. Please refer to the service manual SR7300/SR7300F/PS7300 page53 about details of “10.UPDATE FIRMWARE” “Download Firmware for CPU(Mode2).3. Update the firmware is attached to the e-mail.(file name: SR7300_H8_030502_1.zip) Attention This update is the same as REF.NBR: MZ03-022. (Subject: The output of Subwoofer is delayed) Therefore, RS232C control becomes “new protocol ” which has been updated of REF.NBR: MZ03-022.Update software has been sent with MZ03-022 on July 2. Please use it.SERVICE BULLETIN RS232C control is changed to “ new protocol ”.x for information customercomplaint in case of servicemandatory.MZxxxxxx01xxxx toMZxxxxxx16xxxx“ SR7300_0305021.motApproved by S.NAGAO Written by WQ-19 2 817/additional rule 3 (1st Issue 2003-03-19)Date:28-Sep-2003Model: SR7300/K1GPage:1 / 1REF.NBR:MZ03-041Circulation:Application:Subject:Int.ref:REASONIt depends on the Chinese safety standard requirement.SOLUTIONThe following parts are changed.1. MAINS CORD is changed from (Z011) part no. ZC01803090 to (W001) part no.YC01800880 .2. MAINS CORD BUSH ( 915G ) part no. 450H259010 ( NIFCO #2271) is added.3. REAR PANEL ( 901G ) is changed.(This is not supply of the service spare part)4. AC IN socket is deleted.SERVICE BULLETINThe MAINS CORD changed from AC IN socket typeto fixed type. (/K1G version only) x for information customercomplaint in case of servicemandatory.FromMZxxxxxx30 xxxxChangedFixed type MAINS CORDPart no. YC01800880L= about 1800mm