Marantz CD 670 SE Schematic

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Deco der ( Q 102, S A A 7372 GP ) C 10 8 10 0n c er. 1 00n M KP C 10 9 22 n ce r. 2 2n MK P C 11 4/120 47 u/16 V 1 00u/1 6V E ln a R SH C 11 5.. .119 47 n ce r. 1 00n P PS P ana so nic 38 3-5418 S MD C 12 5 1n ce r. 1 n M KP R 11 7/118 4, 7R 4 70uH/ 2,5 R S iemens 51 7-070 +2 f er rites Driv ers ( Q 106/1 07/10 8, TD A70 73 A) C 15 6 47 u/16 V 1 00u/1 6V E ln a R SH C 13 2/157/ 15 9 47 n ce r. 1 00n X7 R S iemens - o n b ottom -s id e, d ir ec tly b etw een pin 5 an d gr oun d. µCONTROL LE R (QF01, MN1871 64) C F0 2 47 u/16 V r emove C F0 1 47 n ce r. 1 00u/1 6V E ln a R SH +1 00n X7R R F0 1 4, 7R 4 70uH/ 2,5 R S iemens 51 7-070 +2 f er rites R Y11 4, 7R 4 70uH/ 2,5 R. S iemens 51 7-070 +2 f er rites + 100n X 7R S ERV O PC B C 12 6 47 u/16 V 1 00u/1 6V E ln a R SH +1 00n X7R

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MORE MOD'S... - Di sa ble he adpho ne ci rcu it: remov e C901 /9 02 (sig nal ) an d jumpers U 139/ 140 (+/- 12V) - Di sa ble mu ting circu it: re move QN 05 ... 08 , Q N24/25 /9 1/92 and RN 27/28 ( d isa ble s a na lo g -1 2V to mu ting c irc uit) . - Dr iv e ne w mutin g re la ys: r e pl ac e RN30/ 31 w it h 2k2, ta p po wer f rom co lle cto r of QN 02 (ap prox. 12V =) , jumper base an d c ollect or p ins of Q N2 4/25 a nd use mu tin g -li nes t o dr iv e B C54 7's w it h r el ays . - Re place clo ck b y sp ecia l low jit te r cl ock modu le a nd conn ect to pin 28 o f DA C. - In sert se para te 5 V vol tag e re gula to rs (L M317 ba se d) for anal og a nd di gita l V DD p in s of DAC a n d cl ock c irc uit. R em ove U 203 and re place R D04 a nd CD 07 t o o bta in se parat e c onnecti on for anal og +5V of DAC . - Re place fix e d po werch ord b y IE C so cket an d c on nec t g ro un d w ire to ch ass is a t the ou tp ut s ock et. U se h igh q ual ity st eel b ra id sh ie lde d p ow er cab le to c onn ect p la ye r t o mains. - Pl ace v ari st or S 20K2 50 d irectly o n m ain s pi ns of IE C so cket o r on mai ns te rmin als o n P CB. - In sert comm on-mode filte r (F arn e ll 35 3-2 331) . R emo ve U 243/245 an d in se rt filt e r in stea d. P la ce tw o c lass X or Y cap acitor s 4, 7n/2 50 Vac ac ro ss ma in s befo re and aft er f il ter . R EM ARKS - * re place Q8 01 /8 02 wit h LM 317/3 37 o n sma ll P CB 's. Us e e xpe rmenti ngb oa rd or PC B's fo und at h ttp:/ /e ddi e.d ye c. co m .tw/ diy-p ro ducts/ vrm/vr m.ht m for example. F it L M33 7's b y ca re ful ly cr oss-b end in g th e i n pu t a nd o ut put p ins a nd r ev ers ing t he d iode s a nd cap s. U se ta ntalu m deco up lin g c aps. - * * fo r b es t re su lt s : us e singl e o pam ps, e ac h fit for their task. Example: OPA60 2 + THS4 011 o r A D 861 0 + A D8510 for post-D AC + filt er o n S MD ad apters (B row nDo g o r eq .) . E xp er iment a nd list en ! - # th e H DAM -circu it lo oks n ice, but w he n m ov ing up to be tte r op amp s an d in te rco nnects th is c irc uit st art s to i n terf ere a nd degr ades sou nd qu alit y . To disa ble H DA M: r emove R 651 ...654 ( +/- 1 2V ), R 617/ 618 and R H23/ 24. In sert w ire ju mp er at R61 9/6 20 . A lo t of infor matio n a nd tip s came f rom v ar iou s a rticl es and fo rums I f o un d on the in te rn e t: - man y t han ks t o Thorste n Lo esc h f or h is ar ticl e at h ttp :// w w w.tn t- au dio.c o m /c lini ca /cd67 .h tml - a nd c re di ts t o the me mber s of diy A udio .c om tha t co ntr ib ute d th rou gh the forum , al lt ho ug h t he y ar e pr oba bly n ot a war e of tha t (t hey' ll kn ow w ho they a re if they r eco gn iz e th ei r i d ea he re.. .). 22 -03 -2 005 , d ata co llec ted by R. A. v an de r S tee n