Marantz-CD670SE-cd-mod 维修电路原理图.pdf

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1、Marantz CD67OSE modificationsPower supplyPart:Org. value:Replace by:Brand:Farnell:Remark:C803/804470u/35V6800u/35VPanasonic+100n PPSC805/806470u/16V2200u/25VElna RSH+100n X7RC8134700u/16V4700u/16VElna RSH+100n PPSC8153300u/6,3V4700u/16VElna RSH+100n X7RD801.804S5688G11DQ10IRschottkyD811/812S5688G11D

2、Q10IRschottkyDN01/02S5688G11DQ10IRschottkyQ801/80278M12/79M12 LM317/LM337* see belowQ8117805LM340AT-5,0NSC412-703Q8717805LM340AT-5,0NSC412-703HDAM & OPAMPS (Q605/606)C611.614100u/25Vleave in placeElna Cerafine! +100n PPSC651.654 #470u/16V470u/35VElna RSH+100n PPSC655.658220u/16V(wire jumper)Elna Sil

3、mic! measure offset first!C659/660100premoveR613.61627R1mH/14RSiemens608-609R651.654 #27R1mH/14RSiemens608-609 # optional, see belowR655/65610kremoveR657/658100Rwire jumperR659/660100R47RQ605/606 *NJM2114DAD827/LM6172/LT1361.experiment!* see below - insert extra 220n/PPS between pins 4 and 8Panasoni

4、c383-5492SMDOUTPUT FILTERC601.604120p120p/1%Mica867-901C605/6061000p470p/1% PSStyroflex304-0021Bessel filterC607/608100p100p/1% PSStyroflex303-9894CD21.24120p120p/1%Mica867-901R601.60427k26k7/0,1%Welwyn340-546R607/60818k18k2/0,1%Welwyn340-388R609/61022k22k1/0,1%Welwyn340-467R605/606/611/612 10k10k/0

5、,1%Welwyn340-133RD21.2810k10k/0,1%Welwyn340-133DAC (QD01, SM5872BS)CD04220u/10V220u/35VElna RSH+100n PPSCD0547n cer.100n PPSPanasonic383-5418CD0647n cer.100n PPSPanasonic383-5418SMDCD07220u/10V220u/35VElna RSH+100n PPSCD12/1347n cer.100n PPSPanasonic383-5418SMDCD15/16470u/10V470u/35VElna RSHRD01/044

6、,7R470uH/2,5RSiemens517-070+2 ferritesRadioFans.CN 收音机爱 好者资料库Decoder (Q102, SAA7372GP)C108100n cer.100n MKPC10922n cer.22n MKPC114/12047u/16V100u/16VElna RSHC115.11947n cer.100n PPSPanasonic383-5418SMDC1251n cer.1n MKPR117/1184,7R470uH/2,5RSiemens517-070+2 ferritesDrivers (Q106/107/108, TDA7073A)C15

7、647u/16V100u/16VElna RSHC132/157/15947n cer.100n X7RSiemens- on bottom-side, directly between pin 5 and ground.CONTROLLER (QF01, MN187164)CF0247u/16VremoveCF0147n cer. 100u/16VElna RSH+100n X7RRF014,7R470uH/2,5RSiemens517-070+2 ferritesRY114,7R470uH/2,5R.Siemens517-070+2 ferrites+100n X7RSERVO PCBC1

8、2647u/16V100u/16VElna RSH+100n X7RRadioFans.CN 收音机爱 好者资料库MORE MODS.- Disable headphone circuit: remove C901/902 (signal) and jumpers U139/140 (+/- 12V)- Disable muting circuit: remove QN05.08, QN24/25/91/92 and RN27/28 (disables analog -12V to muting circuit).- Drive new muting relays: replace RN30/

9、31 with 2k2, tap power from collector of QN02 (approx. 12V=), jumper base and collector pins of QN24/25 and use muting-lines to drive BC547s with relays.- Replace clock by special low jitter clock module and connect to pin 28 of DAC.- Insert separate 5V voltage regulators (LM317 based) for analog an

10、d digital VDD pins of DAC and clock circuit. Remove U203 and replace RD04 and CD07 to obtain separate connection for analog +5V of DAC.- Replace fixed powerchord by IEC socket and connect ground wire to chassis at the output socket. Use high quality steel braid shielded power cable to connect player

11、 to mains.- Place varistor S20K250 directly on mains pins of IEC socket or on mains terminals on PCB.- Insert common-mode filter (Farnell 353-2331). Remove U243/245 and insert filter instead. Place two class X or Y capacitors 4,7n/250Vac across mains before and after filter.REMARKS- * replace Q801/8

12、02 with LM317/337 on small PCBs. Use expermentingboard or PCBs found at http:/.tw/diy-products/vrm/vrm.htm for example. Fit LM337s by carefully cross-bending the input and output pins and reversing the diodes and caps. Use tantalum decoupling caps.- * for best results: use single opamps, each fit fo

13、r their task. Example: OPA602 + THS4011 or AD8610 + AD8510 for post-DAC + filter on SMD adapters (BrownDog or eq.). Experiment and listen!- # the HDAM-circuit looks nice, but when moving up to better opamps and interconnects this circuit starts to interfere and degrades sound quality. To disable HDA

14、M: remove R651.654 (+/- 12V), R617/618 and RH23/24. Insert wire jumper at R619/620.A lot of information and tips came from various articles and forums I found on the internet:- many thanks to Thorsten Loesch for his article at http:/www.tnt- and credits to the members of diyA that contributed through the forum, allthough they are probably not aware of that (theyll know who they are if they recognize their idea here.).22-03-2005, data collected by R.A. van der Steen