Marantz-CD670SE-cd-mod 电路图 维修手册.pdf

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1、Marantz CD67OSE modifications Power supply Part:Org. value:Replace by:Brand:Farnell:Remark: C803/804470u/35V6800u/35VPanasonic+100n PPS C805/806470u/16V2200u/25VElna RSH+100n X7R C8134700u/16V4700u/16VElna RSH+100n PPS C8153300u/6,3V4700u/16VElna RSH+100n X7R D801.804S5688G11DQ10IRschottky D811/812S

2、5688G11DQ10IRschottky DN01/02S5688G11DQ10IRschottky Q801/80278M12/79M12 LM317/LM337* see below Q8117805LM340AT-5,0NSC412-703 Q8717805LM340AT-5,0NSC412-703 HDAM & OPAMPS (Q605/606) C611.614100u/25Vleave in placeElna Cerafine! +100n PPS C651.654 #470u/16V470u/35VElna RSH+100n PPS C655.658220u/16V(wire

3、 jumper)Elna Silmic! measure offset first! C659/660100premove R613.61627R1mH/14RSiemens608-609 R651.654 #27R1mH/14RSiemens608-609 # optional, see below R655/65610kremove R657/658100Rwire jumper R659/660100R47R Q605/606 *NJM2114DAD827/LM6172/LT1361.experiment!* see below - insert extra 220n/PPS betwe

4、en pins 4 and 8Panasonic383-5492SMD OUTPUT FILTER C601.604120p120p/1%Mica867-901 C605/6061000p470p/1% PSStyroflex304-0021Bessel filter C607/608100p100p/1% PSStyroflex303-9894 CD21.24120p120p/1%Mica867-901 R601.60427k26k7/0,1%Welwyn340-546 R607/60818k18k2/0,1%Welwyn340-388 R609/61022k22k1/0,1%Welwyn3

5、40-467 R605/606/611/612 10k10k/0,1%Welwyn340-133 RD21.2810k10k/0,1%Welwyn340-133 DAC (QD01, SM5872BS) CD04220u/10V220u/35VElna RSH+100n PPS CD0547n cer.100n PPSPanasonic383-5418 CD0647n cer.100n PPSPanasonic383-5418SMD CD07220u/10V220u/35VElna RSH+100n PPS CD12/1347n cer.100n PPSPanasonic383-5418SMD

6、 CD15/16470u/10V470u/35VElna RSH RD01/044,7R470uH/2,5RSiemens517-070+2 ferrites RadioFans.CN 收音机爱 好者资料库 Decoder (Q102, SAA7372GP) C108100n cer.100n MKP C10922n cer.22n MKP C114/12047u/16V100u/16VElna RSH C115.11947n cer.100n PPSPanasonic383-5418SMD C1251n cer.1n MKP R117/1184,7R470uH/2,5RSiemens517-

7、070+2 ferrites Drivers (Q106/107/108, TDA7073A) C15647u/16V100u/16VElna RSH C132/157/15947n cer.100n X7RSiemens - on bottom-side, directly between pin 5 and ground. CONTROLLER (QF01, MN187164) CF0247u/16Vremove CF0147n cer. 100u/16VElna RSH+100n X7R RF014,7R470uH/2,5RSiemens517-070+2 ferrites RY114,

8、7R470uH/2,5R.Siemens517-070+2 ferrites +100n X7R SERVO PCB C12647u/16V100u/16VElna RSH+100n X7R RadioFans.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

9、 -12V to muting circuit). - Drive new muting relays: replace RN30/31 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.

10、 - Insert separate 5V voltage regulators (LM317 based) for analog and 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

11、. Use high quality steel braid shielded power cable to connect player 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 4,7

12、n/250Vac across mains before and after filter. REMARKS - * replace Q801/802 with LM317/337 on small PCBs. Use expermentingboard or PCBs found at .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 d

13、ecoupling caps. - * for best results: use single opamps, each fit for 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 c

14、ircuit starts to interfere and degrades sound quality. To disable HDAM: 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 RadioFans.CN 收音机爱 好者资料库