Marantz-DR5000-cd-sb 维修电路原理图.pdf

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1、Approved by Y. OkabeWritten by K. OnoDate:15-Dec-00Model:SR5000Page:1/1REF.NBMZ00-013SERVICE BULLETINSubject:Circulation:Application:Improvement for reliability of Power amp circuitx for informationcustomer complaint incase of servicemandatory.MZxx0032xxxxxxAnd earlierInt.ref:PHENOMENONBlown Power T

2、ransistor at Power amp circuit.REASONUnstable idle current at the power amp section and low sensitivity of speaker protection circuit.SOLUTIONReplace the resistor R641, R642, R643, R644 and R645 to 220 ohm 1/4W (4822 050 22201,GD05221140).Replace the resistor R616, R617, R618, R619 and R620 to 30k o

3、hm 1/6W (9965 000 02635,GD05303160)Replace the resistor R681, R682, R683, R684 and R685 to 1.5k ohm 1/6W (4822 116 52243,GD05152160)REMARKThis improvement has been done in the production line after the year and week code “0033” andlater. The year and week code are mentioned in the serial number labe

4、l on the rear panel. (ex.MZxx0033xxxxxx)RadioFans.CN 收音机爱 好者资料库Approved by H. TamuraWritten by K. OnoDate:16-Mar-01Model:SR5000Page:1/1REF.NBMZ01-005SERVICE BULLETINSubject:Circulation:Application:Part code number missing (POS. NO. 1).x for informationcustomer complaint incase of servicemandatory.AL

5、LInt.ref:PHENOMENONThe part code number (for PCS 12NC) of WINDOW FIP (POS.NO.1) is missing.POS. NOVERS.COLORPART NO.(PCS)DESCRIPTIONPART NO.(MJI)1/N1WINDOW FIP285W158010 CORRECTIONPlease add to the part code number for PCS (9965 000 07568) as follows.POS. NOVERS.COLORPART NO.(PCS)DESCRIPTIONPART NO.

6、(MJI)1/N19965 000 07568WINDOW FIP285W158010RadioFans.CN 收音机爱 好者资料库Approved by Y. OkabeWritten by H. TamuraDate:28-Dec-99Model SR5000Page:1/1REF.NB MZ99-033Subject:Circulation:Application:Int.ref:PHENOMENONThe picture quality via S-Video out is too poor.REASONThe amplitude gain in the video buffer amplifier is not correct.SOLUTIONAdd resistors 150 5% 1/6W (4822 116 83868 : GD05151160) to R272, R278, R281 andR282 (470 ) with parallel junction.SERVICE BULLETINBad picture quality via S-Video out.x for informationcustomer complaintin case of servicemandatory.MZxxxxxx01xxxx|MZxxxxxx14xxxx