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Project: Pioneer SX-626

Super Noob

Super Noob

Super Member
Had a few extra days off tied to this weekend & looking for a vintage rig to gift to a co-worker. Lo and behold there popped up a non-working SX-626. The pictures showed the pre-amp jumpers missing, so I thought this unit might just need some refreshed components. At pickup the previous owner provided the following unsolicited response, "it is not the pre-amp jumpers".

ACtC-3cqbmgX-UMVK2LD1HgBxHmNn7Wgxw0Zxl7fy-8Cd6syu2Fu2IM3jJRv7FN10-tc9pNgydmd8MReuvLWVsuwzHQcKC4OELMMkeGyDf-1KgP8wuN22PiL1eDA_qhFWwXFH0Yv_lFCB7_PxR1Kyq6IVaNH=w1139-h854-no


No worries... actually perfect - I like a challenge. I am in. This unit will be going to my boy Micah (ME). I enjoy the rebuilding process and sharing the love of equipment that is 50 years old. It hard to imagine too many entertainment items this old still holding their own in 2020. Unit was born in October 1972 (SJ). Prior to my birth, the SX-626 was doing service. My experience with early 1970s Pioneers has always been positive. (SX-727, SX-1010, SA-900) The SX-626 is cap coupled - this will be 4th rebuild with this design. Have yet to find one that wasn't pleasing.

This SX-626 is FW model (early design - not 1973) with dual line voltage switch 120 / 240V switch. The receiver is rated at 20WPC with harmonic distortion of less than 1% & weighs in at 22 lb. It came full of initials, autographs, name, and social security numbers (at least it was not engraved).

ACtC-3e729s4wRDv0b2cQLfssLSRM2p--64stzARXbNPlyS_RYbUA9QhuSy6nCum8s6N_wPLXd87jkWXhCu60Y6LtYEFI7kHSBUIacAS1pZOKRU_lW_fdNIpaiVQN7LjDYV--o-Vuhu6tzVQ9uewsl6PD9hz=w641-h854-no


ACtC-3f7nPI3ZlIO5e2U0UZoKdeNaH8P66DmprWyMGeSHd3pzPE5KpMQ1iASJTA2uRxTo_wk59GbqhUuBrCyJb9uyNIztfnOYwYnnk3XL0tyEYRgseK0TWI9tCrvPB6eMuaJfvQcdzL1Z8UrCTNn_hxv7IbS=w641-h854-no


Found one of the protection fuses blown and the other protection and power fuse were at least four times recommended rating. Popped in the correct fuses and power up on 60 watt dim bulb tester. The bulb went bright and then pulsed after some time. Next - I checked the outputs and they tested good. Suspect the power supply.

Time for the rebuild posts... hope someday that someone finds this thread and rebuilds a SX-626.

HorriblePowerfulBlackfly-size_restricted.gif
 
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Power Supply Assembly (AWR-006-D)

Capacitors
C5 100 uF 35V Electro 100 uF 50V UPW1H101MPD
C9 330 uF 25V Electro 330 uF 35V UKAV331MPD (recommend UPW - just didn't have these in stock below 50v)
C10 330 uF 25V Electro 330 uF 35V UKAV331MPD (recommend UPW)
C12 100 uF 16V Electro 100 uF 50V UPW1H101MPD

Transistors
Q1 2SD313 MJE15032G
Q2 2SC945 KSC2383YTA
Q3 2SD313 MJE15032G

Diodes
D1 SR3AM-04 3A / 200V STTH3R04RL 3A / 400V Ultrafast Recover
D2 SR3AM-04 3A / 200V STTH3R04RL 3A / 400V Ultrafast Recover
D3 SR3AM-04 3A / 200V STTH3R04RL 3A / 400V Ultrafast Recover
D4 SR3AM-04 3A / 200V STTH3R04RL 3A / 400V Ultrafast Recover
D5 SIB01-01 1A / 100V MUR220RLG 2A / 200V Ultra Fast Recovery Diode
D6 SIB01-01 1A / 100V MUR220RLG 2A / 200V Ultra Fast Recovery Diode
D7 WZ-130 13V, 1/2 Watt 1N5243B 13V, 1/2 Watt, Zener

ACtC-3cVOtcQL1RGLzypEvp3HzogWtsEg19EBe_wr85Xhz_cmplDBQrvlHU82uSAYBFr0jIcBUo7mYCC3mTng8OKYk4pJZn8KZ9JNbA28OVyIiRe2LOqqqWTM6gO33BkoQ8EdExM6kStJDCTTLRl5xzkrddm=w582-h595-no


ACtC-3cxhjRSWhRWBVgalGqcgevQ1Y-NKmPvLE4pqGAEzp_uP-cpcYcmN6LjCd_bWzH0UTTUFhfIvOeF3ZHXfdQ9PVrLC1NeXPPSUc4WUIJqxvLIo1MeTS_Ld5BMSYtBpi80i7dnw8Wfzo_U9Uw6OL020OSv=w678-h367-no


ACtC-3fWA4_RMoA9JXzCE6x_WSc1ntHlDyoOnjQA3hn5kmAy94ttCcucI5pc7EP24hymdtmXM-YpLEiSoPjiFKm3cvZihU4dyxaK5U2APRl2lAx4I-ru4hgL3FWs6evDIxs1wCXoZlhA8vi26LE8PwbXBYtk=w561-h698-no


Before:
ACtC-3ciY9NSyFhUYZyhUjyb1fluNoPKXtMsxEwLdKc7ew403f4cjZM5UuMQuaQKqp93j5SzgJ2v_nvJK6U4cRMjLJROaLCNqRfUhH7fRT5uew6KAunMPjLxwEp-_RoOqohHYO4T3l_vKQpnnT0o1rDcjxwq=w1139-h854-no


ACtC-3dIGvKR_CWDxVf1-95a6Zb2gC3YSuzabPiEt3NKbJWrDwfHmWunefrOuWL8hUSnf40npRr6IMU1z3FX9bG-itfg9Z4Pqs5khRYuDERfMrhzZzeV0_xnt9KK7vZcQUlQIBngn-uTjBjZtQhhdVNXGpiv=w1139-h854-no

ACtC-3ckBthbRueXyC2OOZf2c-xcdc2fGvIFqyLyT-KTlI1uHY5V40SEK-oHiiICfevMJHsMfWviZO1uYQrv9m929nrvSOOZdQEna-N60rj9gaOelNf1HKNNRIIVRW4e-J9UbAeF62XPRaCnoxWwboJROP4U=w1139-h854-no


Added a heat sink to Q3... think it should have had one. Running much cooler.

ACtC-3cHfMR_brlL_rILrwbqts7SMngx5O1tRtnlPcNv5CSohtxyyZpc5sUwy-F-sRooHyzE6CKVoXQqcK6w-B7djDeL4S6N3Z2LQA_3ZfgdVGQ0gl-5wQMSHLXy2oUAcheVRQlV-mnDcfp0dmo0h2wAu20d=w1139-h854-no


Pretty sure all the silicon tested good.... the 100uf was puked out- anyways all new.
ACtC-3dn8-sbRknGqmvRKuItTNrmJVvuIYocEzfizQ1JqbYDx-CgrhynqDdArnJsMgdNn7P3zIz4A8zEBVjzKAtte45pj4IJb6imV38GUOj_RvzpQjaG0xiJ77VkEuaT4HcLIk_5SHgStmD7_hiI1yEd3t-X=w1139-h854-no
 
Last edited:
The unit powers up... and bulb goes dim.

ACtC-3dNV5GZettqfejeTSsWnMlPziz6BguvxX5s2fsmXj2DxjBGnhtaNZORTjD8x3FA-m3_crLPxq3H6WxGy-_ykXMuAwTmh5fkPBmw2GcBBA70jYttDnTum8Hm7y_Cliu9pEOqBoGFITtHBalbqi6s8Ui4=w641-h854-no


Set the bias to 17mv measured from exposed lead taped on each coupling cap to ground. Set the lesser output collector to (50% of main voltage measured on main output). For this unit = 55.5V / 27.75V. Make some pre-amp jumpers and take a listen.

Tip = the T03 case is the collector.... so you can just clip on the exposed threaded post holding the main output to the heat sink.

She is alive and sounds really nice. Time to move over the AMP board.
 
AMP Assembly (AWH-002)

Capacitors:
C1 3.3 uF 10v Electro (CEA) 3.3 uF 63V MKS2C043301K00JSSD
C2 3.3 uF 10v Electro (CEA) 3.3 uF 63V MKS2C043301K00JSSD
C3 100 uF 50v Electro (CEA) 100 uF 50v UPW1H101MPD UPW - Nichicon
C4 100 uF 50v Electro (CEA) 100 uF 50v UPW1H101MPD UPW - Nichicon
C5 3.3 uF 25v Electro (CEA) 3.3 uF 63V MKS2C043301K00JSSD
C6 3.3 uF 25v Electro (CEA) 3.3 uF 63V MKS2C043301K00JSSD
C7 100 uF 50v Electro (CEA) 100 uF 50v UPW1H101MPD
C8 100 uF 50v Electro (CEA) 100 uF 50v UPW1H101MPD
C9 100 p 50v Ceramic 100 p 100v FG28C0G2A101JNT06 C0G Ceramic
C10 100 p 50v Ceramic 100 p 100v FG28C0G2A101JNT06 C0G Ceramic
C11 100 uF 6v Electro (CEA) 100 uf 16v UKA1C101MDD UKA - Audio Premium 105 C
C12 100 uF 6v Electro (CEA) 100 uf 16v UKA1C101MDD UKA - Audio Premium 105 C
C13 2200 uF 35v Electro (ACH) 2200 uF 35v UKA1V222MHD UKA - Audio Premium 105 C
C14 2200 uF 35v Electro (ACH) 2200 uF 35v UKA1V222MHD UKA - Audio Premium 105 C
C17 0.022 uF 50v Mylar 0.022 uF 250v MKP2F022201B00JI00 WIMA - Polypropylene
C18 0.022 uF 50v Mylar 0.022 uF 250v MKP2F022201B00JI00 WIMA - Polypropylene
C19 100 p 50v Ceramic 100 p 100v FG28C0G2A101JNT06 C0G Ceramic
C20 100 p 50v Ceramic 100 p 100v FG28C0G2A101JNT06 C0G Ceramic

Transistor
Q1 2SC732 KSC1845F
Q2 2SC732 KSC1845F
Q3 2SC497 KSC2383Y
Q4 2SC497 KSC2383Y
Q5 2SC497 KC2383Y
Q6 2SC497 KSC2383Y
Q7 2SA497 KSA1013Y
Q8 2SA497 KSA1013Y
Q9 2SC793 T03 Output (Retain)
Q10 2SC793 T03 Output (Retain)
Q11 2SC793 T03 Output (Retain)
Q12 2SC793 T03 Output (Retain)
Q13 2SC983 KSC2383Y

ACtC-3cdSBul-hYTPyvEg6Z1qCMI_MwNMIOn7OgSrIxtd08sR9WVL4pU_Cn2fpb-MODlMNmc8_C38gd2T5HaAsF-jjtNMpF3LB5sMtXnzGtTKsDPTBxoZMw8NEmZZDkX6x_qZWIcKoBLpVolf5nEeIWiaJhV=w881-h791-no

ACtC-3effamoRwaLdaD5sCsbShkYiDKm3J-E1kBmQu7zbBXBdqhrMhHEoemUAG2sYlg7PZzhdIocXwKj_g7xKtTOzPIUbE1oSZImpQDgAP7HJXy1LFqPBU1j8brlrnfbR5VN3JMCxeGjAlvE2mYpKzIMlwDJ=w1063-h528-no

ACtC-3eZ74L_1UYQ3eVjsSrxHXrTv3--Pi6O2F5K6wYh2BA5kbWo2EYqHqeRX4CwJisfrm_LX0sOn7UNaak7IVJ_-AJyT1vs7b5GxMEzdIi6UctPxhzNg7Q47QhjpzZ3HkP5v46IE4mIU5RNx8tZ7JfLPIoh=w594-h735-no


Before:
ACtC-3e8ALzznTPcBZPYoesYHoaQE9Oz41xK069yYGaOpFlTDPvC24Er0QWplf3Ux7FcgnMalL_uZFt17pQtl2Xm9rUNbmUy5Oms3KtKBf2sMDjp6iZG_PnUtcTPV3xzN3W0zBUmwEiJrp2rhXIi9ACK1DJq=w641-h854-no


Decided to rework the bias trimmers with some 100 ohm 1/4 trimmers I had on hand. Used a Dremel to grind off the wiper trace. Broke the ceramic top of the 2nd = but still worked out fine.
ACtC-3fAeMGvCtUqK1m50TnhJeXEunhJWhKVmqrJnOfViod-rPzYL71vOzXnkAtbT5FGglPTdUkMd9BdBTCeL10UOTT2Wyo9tzSz8qvhFd2jVlF8ARLFPfoh2tbTcWA2nphfMjTgVOvAQrYayEBvBPG4MUpE=w641-h854-no

ACtC-3erwaMRFIxFyQESjn4TEcMJSwoI35fV7d_ksNpsEsULzQfthgWJSkVkVvd8f4lnS7TDAngPcLqtTtu5L-9YI7mSYC-T3wcatRYpg740epG2lMHYLsGKT1Qqhj_JSdeNw3whSz2ICzRTiWve1GTwyGJJ=w641-h854-no


Some glue removal...
ACtC-3fSEkFjK2vV2w2QhLqbrMfw-q7WT_MZhPRScMoyqT8SD50z1nscdXNw1TUs9hc4F2rZMuKORGSu7I4Ic7E07SDbr4RA9CeeFq3n2xydff0mNBgAQzfjBiUux6mS3usSBCXrFtSsAJvLqmD2Tg1xqe3M=w641-h854-no

ACtC-3e2HRPGohA5TbRFnqt7bs9Je8B2ozQg95tbm2RGwqcsafUd_Ft0swr5nq58l9VtK7lvfOrTD1n70zUCGwQs3a-NMJY0k2XI0DR0mL_WD5UKYrs9zBa7M9eW6-bM_uAAZRlCv3Yyqsif0O2MB5L0pD-t=w641-h854-no


Finishing up... still waiting on main filter cap, 2200 coupling capacitors, and 25K lesser trimmers (should arrive this week).

ACtC-3ca8m_v13KrR6qO-UUVy2oL7l-1XihuZX4FtftMR7GH0796AtYsKYzbV1ZBDEGYu0Asujy7wIk0AIy8jMft2MCnJCH9TY3rbowMXDxkgwrhVTDRmW9qOwzcNr6l7718bRC_KCi4XlY-iIr5X3aNhYZp=w641-h854-no


ACtC-3fTWQtTap5_LyZKxk27lZwhHk8WSN2DAFQiHbgqPQeLURsj0zsrgCPUWiVQpUQUmJOO8OvWSO_3VNp0Pf8dNPA0cKoEtenpnmmNJfBpiZU0XT2kSTK8noSJcOkGRTM-eDh5vk1alBMIudenI0H3MSkH=w641-h854-no


ACtC-3fwARfU9pXc0PLh2g5sCX8eZjividfRvmV-fVg7FTogwUHanvmrouktac70eS5tcXCjFC_nJxnzCZR_hOCS0BGn5nEX6myPj85WnmAH4orgkP2_y9Usgi_ve26GSHldiWOp9AKiRnY6WtJ8yhF_0gM_=w641-h854-no
 
Head Amp / Equalizer Amp (W21-004 B)

Capacitors:
C1 10 uF 16v Electro (CEA) 10 uF 25v UKL1E100MDDANA
C2 10 uF 16v Electro (CEA) 10 uF 25v UKL1E100MDDANA
C7 0.47 uF 25V Electro (CSSA) 0.47 uF 63v MKS2C034701E00JSSD WIMA
C8 0.47 uF 25V Electro (CSSA) 0.47 uF 63v MKS2C034701E00JSSD WIMA
C9 3.3 uF 25v Electro (CEA) 3.3 uF 63V MKS2C043301K00JSSD
C10 3.3 uF 25v Electro (CEA) 3.3 uF 63V MKS2C043301K00JSSD
C15 100 uF 35v Electro (CEA) 100 uF 35v UPW1V101MPD UPW - Nichicon
C16 100 uF 35v Electro (CEA) 100 uF 35v UPW1V101MPD UPW - Nichicon

Transistors:
Q1 2SC1312 KSC1845F
Q2 2SC1312 KSC1845F
Q3 2SC1312 KSC1845F
Q4 2SC1312 KSC1845F

ACtC-3cOnZSXP4NUkhs5HMvRQ08KYz91JAVpFMbHIITXTLqPEzSAX3URn-DGL52njo1nR6FqfATmJCPGMz04zf-lKtLLKcL_TVH7mz-uyuwNPkdnRHruUlQHfLj-Txv0Peyt1-XngUmZHU0Dw-85vJtTyw0j=w574-h709-no


ACtC-3cSBe1iFdHM1dmbOL8O_Yx5Ezcv79MHRu1IpCgeAa_aSmhOpG1EM7EYZ_Oji_QZVz16babcEwvTxg1IKfVA8fW0YbwLnKyCNgRRWKpWKrfpWrdDN0rMSm-5Mi-CMPXFVzNhfYKVa_Yp9zEu2ZP-vslD=w805-h456-no


ACtC-3cOoVn7aYKXml9qIvU6bTw4-403OfDI8jwmeeTl3Whnr6WgNbp9aoKO2Ov5j3tdoLax-KeHcOOjnH6NncJbygFKoLrJPsTBgk5axS-_0q6OO03tsrfgD11hV2X5TeEJoHylBoe2K8yvhoJYii1_9ZtC=w604-h440-no


Before:
ACtC-3cv0cf4RUXJJcBtRSwvdgq4wJ-LIFZs6YUrIM4QFb7xyW1XC8KNb-6ku1kSczadWR1gF9hgjWvBqYULSKKpAbQTid4z6Ru85xQY0SSqD8-K3QGcfqTSdUwsga3FwL-AL417VdeRZi1YFxu9P1TgtmlS=w641-h854-no


ACtC-3dGhKksSiUixeQIhCGtLHImiZxDUz_eqTPuSKWE6F4dVntqPHmtgWFwbH6FEyKnza1j0TBeCki7jBkzxBgQMP_4tU1Ag3EXy9zjY7AHAv6KCH7j5jpznUHO62clDBhV1rgwaOaZH2-wiFtC16mJ2f-e=w641-h854-no


ACtC-3d0NO3JvqD2R9g4RPDT2QOIvvMMUNsZO7Ed6ftrX610rwhNrxoBPtWWRqHb7xeu1NfzBve0H2R1Ag3U3HCkWzEruu-tgzLlARNNcVK8Pm7mLS7dG5BkDDgkBG7a54HPzNEharYyjAUofQ8N_PuiHdIg=w661-h881-no
 
Last edited:
Control Amp (AWG-008-A)

Capacitors:
C1 0.1 uF 50v Mylar Film 0.1 uF 450v ECW-FE2W104JA
C2 0.1 uF 50v Mylar Film 0.1 uF 450v ECW-FE2W104JA
C3 47 uF 50v CEA 47 uF 50v UPW1H470MED
C4 47 uF 50v CEA 47 uF 50v UPW1H470MED
C7 47 uF 6v CEA 47 uF 16v UPW1C470MDD
C8 47 uF 6v CEA 47 uF 16v UPW1C470MDD
C11 4.7 uF 25v CEA 4.7 uF 63v MKS2C044701M00JO00
C12 4.7 uF 25v CEA 4.7 uF 63v MKS2C044701M00JO00
C19 10 uF 25v CEA 10 uF 25v UKL1E100MDDANA
C20 10 uF 25v CEA 10 uF 25v UKL1E100MDDANA
C23 100 uF 6v Electro (CEA) 100 uF 16v UPW1C101MED
C24 100 uF 6v Electro (CEA) 100 uF 16v UPW1C101MED
C25 47 uF 50v CEA 47 uF 50v UPW1H470MED
C26 47 uF 50v CEA 47 uF 50v UPW1H470MED

Transistors:
Q3 2SA725 KSA992F
Q4 2SA725 KSA992F
Q5 2SC1312 KSC1845F
Q6 2SC1312 KSC1845F

ACtC-3ePmC2kfRLVvAC_9Lr8prDfMXvzuwu6Av-z7srE0FbEjNtl-Zfpd72DLBsgZ_qAGrVjWLNWUKeseMr9-zJsKzv4Y5mS61gCfMwbksoiA3H2VT5LtvvGQ9RWbc9ydhGL1gLuInpqIylTo3Ob6JbknecE=w746-h709-no

ACtC-3fBU7J6ACUzecY_aUS-drhAKh27lVEjEje0G48gBX5cCxpvliCQKP5iTTH_XVshuy4i6FUaHvgNgmvSMI3VJspIgzqmZBwC5CHCUBM9iqPyQ0dzNJ93Ml5lL5XrZMpcTGAcRMLFU1fcki4g1b_Dg1Au=w755-h477-no


ACtC-3fcjgQq88u2McemuGA3NhRpQD6-Jyey_P5dmfjT_mmVuJuEPEJAty2rQ9L5RcPBhXH6zl02I-uF-paK_JA4oNubVsPe1xvOhScBgdXoRMUNN69BYRb3HZfROGmIgjHP7vNQ2byKC49Yu4y_lMmVgg36=w596-h552-no


Before:
ACtC-3dHK1K_Qod6R46TKHRDRqVPbqch1_RU07_QS6ZSzjwVgOVzM4tnrRP7m5lx9ke-6dBQwUMj88q-LnancywgjN36edMs-f2UAt-d-gXHeZhz0tAC5fRUJf9WFXVupkUR29nJpwSvvABKpRG4BjiARakU=w641-h854-no

ACtC-3dwkzvqq1x9Bq2p7EfxfAytwK_KBCr9F52VcKdrqYzGZ-lmx_agQJv8tYFCmlUlKfbG8YhRomr8_z_kKA6CrDNVwm36EANYvY1elIuUpckFLaeX5vj53_QKr1F99y8nTBduTghUA4n4Gvd27fldLire=w641-h854-no


After:
ACtC-3cyEU-9j9C6flg5wfZiGs6qonqScFSPtD2HG-nXqwMKt6bUPjJacFJVPyVyt4bEfLVXITvCaVUfDHc7wuqot-uCZMY-TW4GOlA155IRndBThGzLR3jd08-TkrIpTROitd_aFNVBDOW19i2yYn4kNLV3=w641-h854-no

ACtC-3dIclpSBVVElJi3GdI8T4pPy0VBi9hlEWkXZGEM25YGHRFUYYl-ui2VpsYnk6e72qmuJ21HkUvsNlAxaw1IE4jN3YH0kxRMhMnVCNUOCKvsPEpF1Void-Uz7gXsBp699Szd44cZKDUSKl34XM6uN2T3=w641-h854-no
 
Last edited:
paul_ral said:
Check the leads again for transistors in the bottom
Click to expand...

Paul.... you are very detailed. Yes the transistors at the bottom of the picture were both installed backwards.

Wrong:
ACtC-3cgHXaOurQx5E5NOM8gJd54CcwBlsht2LupvN1tNj2lPlEISPgPPucp129evzczm30xbJDSPCSiy8W7k9696M0w81hoVfRQIXRaVyd3ulo0lNskojcZMn_uM6fveJDqq_NlDaN_rb1BP3Z9o_F5YDKu=w641-h854-no


Corrected:
ACtC-3d0NO3JvqD2R9g4RPDT2QOIvvMMUNsZO7Ed6ftrX610rwhNrxoBPtWWRqHb7xeu1NfzBve0H2R1Ag3U3HCkWzEruu-tgzLlARNNcVK8Pm7mLS7dG5BkDDgkBG7a54HPzNEharYyjAUofQ8N_PuiHdIg=w661-h881-no


Will update the picture above.... but I want to personally thank you. Not sure how it passed the DBT, but it did. It is embarrassing and humbling. At the end of my thread, I was going to solicit some advice about chasing the FM Stereo MODE only worked in both channels with MONO depressed.

Spent few hours trying to trace the signal with no success. Corrected the head amp issues and now my FM Stereo works in both channels once engaged.

Thanks again Paul.

+1 Paul Ral
@paul_ral
 
Last edited:
Tuner (AWE-011)

Capacitors:
C23 4.7 uF 25v Electro (CEA) 4.7 uF 25v UKT1E4R7MDD
C27 1 uF 50v Electro (CEA) 1 uF 63v MKS2C041001F00JA00
C29 4.7 uF 25v Electro (CEA) 4.7 uF 63v UKT1E4R7MDD
C30 1 uF 50v Electro (CEA) 1 uF 63v MKS2C041001F00JA00
C33 100 uF 16v Electro (CEA) 100 uF 25v UPW1E101MED
C36 10 uF 16v Electro (CEA) 10 uF 25v UPW1E100MDD
C38 0.47 uF 50v Electro (CSSA) 0.47 uF 63v MKS2D034701E00JSSD
C45 10 uF 16v Electro (CEA) 10 uF 25v UPW1E100MDD
C53 0.47 uF 50v Electro (CSSA) 0.47 uF 63v MKS2D034701E00JSSD
C54 4.7 uF 25v Electro (CEA) 4.7 uF 63v UKT1E4R7MDD
C55 3.3 uF 16v Electro (CSSA) 3.3 uF 63V MKS2C043301K00JSSD
C57 3.3 uF 16v Electro (CSSA) 3.3 uF 63V MKS2C043301K00JSSD
C58 1 uF 50v Electro (CEA) 1 uF 63v MKS2C041001F00JA00
C61 0.47 uF 50v Electro (CEA) 0.47 uF 63v MKS2D034701E00JSSD
C65 100 uF 16v Electro (CEA) 100 uF 25v UPW1E101MED
C66 2.2 uF 16v Electro (CSSA) 2.2 uF 63v MKS2C042201K00JO00
C67 2.2 uF 16v Electro (CSSA) 2.2 uF 63v MKS2C042201K00JO00
C73 47 uF 16v Electro (CEA) 47 uF 25v UPW1E470MDD

ACtC-3fGlNWvuhUXJsN8JDqsHKLO1evRlQB9zrrBwSluByaCYmNN6RG7zOi1lpNJgMhGPaM4J8FpIa1eqLIEI0VOwIFvIiFuZR_TDQPuStsueHaG8zPByWiphhyVCAIU_f5h6PfRL-CaIazJacx1Cn8zMd2L=w1183-h713-no

ACtC-3d3uSMfHYxJdm3YksLOqIdl1aXljaowRDY70pchqpS8hs5_07vWBQeSPZMQqwDZHBRoM1l58hZfnq2iecWcM29E5Dke0z6dx8JFQqLmiMdpTwQ_0aEUV9mxnPEn0XeaELv2-twTQIEauKMZaKyyu4_4=w1158-h460-no

ACtC-3dN6nabS6xKuNusI6nfxSh6lPi0qAZxQ0Y4a428gTb4Yrt3Eln42svwo77UoyTMDznpwCJwHABIfwukKyexmb4L4to399Nj1wDiQDO_uqATBt56ZKNkZrW4kTvOzXWEZXlIK2QfBXAL3EweklRnI8pI=w361-h732-no


Before:
ACtC-3ejmgIi_lJuS-ZKNdd-c-wmowUt4HZa2ONwUL-93o-m0Z4B3Zs9dO1PGnyDYxr3TjTdkjvj1Rp1B0-Jr2uUjWb-3pi0ZfP-NxpZ9hRolwzrWsS3JlQAb8qeUjtUWADZ-SSe1Bp0qwiG0HNOB6eRqW9S=w641-h854-no

ACtC-3cdq6ZQrepPecdi6-D079KL1-CAH2muNPblr-QUD4k33hy_ponYTmuUMNa4hKk9Zt_kfeM57hqnuEWuaVtilXqnKd_x4jXci1NesIe9TgSUf-rPskgM3WwGuwg968y4F2rpug5VWsvFKGm88Uskou5G=w641-h854-no

ACtC-3cpLO-NBkBUsyPXwhHiBBivO33Qat8HA09CFVm2E74oPzxCtlXANtsYHEqRVqO3sSZCT_Xcfq8Xe8Tkt9tp7qoCHtrRe3q93yMtprt1AVi-68TGShdiNhESxIfmovBPZznEbaKSdpkJcM9s_RUJhSUZ=w641-h854-no

ACtC-3fBrsEZFKpL91ng3f6XNnTtt04rs1cljFpG8LE8dF-MK0OQDnyQuQ4wyaxewQg1iNEBBl3B_fzykCKW-HgoPz_n2n2HHfvJtz9ictLn8znFubuYjwJdFGqLYsC66LEagTKWerIdHGFxwbP__VDeDX_K=w641-h854-no


Strong tuner... big improvement with those lovely Sanyo Cap-Sistor changed.
 
Some lighting next...

Before:
ACtC-3dbyf2S9OAfNnAboD0j0dgkxNkyNX4kPZO5NYyfxWDNQmcEuH39gfTgyy5KusYH9UzMx-I0MQCJ22J9Bv8yD9CSu6BUSK7mc82fCDMxKf5pxxABh4kgxA2Igd9ZbjHsxK8X6cCKvTFqq-rNiGvnQDg2=w641-h854-no

ACtC-3ds7njKkyEM40QrHFhCiv5OQiQ71RX69GaoXB3MGRiUKxCe8a0qanNA9l2qgLYtm2vm2SoSKGuGsqe0f0O_Gx5Qi9dkQd0icaLFe5uypUDSqEJBaOG-olQHj5exEt5wbbYOZr6o2kApVe9_46NOQibE=w641-h854-no


Surprise.... everybody's favorite side track. I didn't hit it with solder iron (but would be easy enough to do) = but pulled out one of the glued in incandescent indicators and the force popped the string.
ACtC-3daYXVuwUG_iQcfZPf-ndeHqpD5AR6wuqCk9wtl7XawxECp-v_3ejWFlOAD_lOey1AL1iIiE4e6lyYAl_SMTByV1F_fJ880b1xMNP8w_IvlMntEJWloHlSJPyBuokyBoScFnlUUJZkg4N5-Hf6iT_0k=w641-h854-no


Have restrung a tuner once previously.... used 60 or 80 lb. braid fishing line. All I could locate was in my teenage son's room was 30 lb. I was working off the wrong dial string routing diagram (later 626) and was able to successfully route backwards (dial opposite).:thumbsdown:
After a hour or two of fussing = it is restrung and working great. :)

ACtC-3e8eJNM7Gjxb-7EvE4spUDts_SKJCDJTyjo_dXpoRMNfeqh2HFN_hQ3mR0euY3KCnHojBfq0hScyNEpLQploF8Y7Jji9N0wn7ghmOKd-meGT5vVwp18WnSjE-_FFh7W6Puoo3toUaeCy2zUJzCg32OT=w1139-h854-no


Back to the LEDs:
ACtC-3fphQwqOcOcqaC-DjmWqlJcow6ME78P5AHFKBHxoyKlRjdD2ftEa9aNn3O0Xw9cnnwLLSoSGnFa6IIX10HIYCcK5u6vnBX1-8Y3xsM7m7BhAi4nx2acaJYKhLa_K3_i_xxSgAS3f81O_Yozwx81ba2U=w641-h854-no

ACtC-3fLCAGdPv8n4RZy-z9vIKjiczl65va-t5ow-czJWUHuzawYmotFQDCvdznNnpeLqwv2QNeDmX89xVaSL8HmzIheJXMUELo0nLC-W3E_weBdRuOSgYPWn6wrlxicm4NgnykW_eVP_4P6Qt0eV-g9fUED=w641-h854-no

ACtC-3eDStuepLEa3lvOYffopHfqK-4HCV8UcMTZTSVN1SXBho_O1g_N5CoA2nuZW0mgm7_ZmkZrkZO2-fCpCArrBeat9Vf2inI9SdOia5-p6yQcQtdL95_i_DDqGd4dIhF9PucZyNEEMp5h7Iu8wcBRT3CA=w641-h854-no


ACtC-3fS0PsDNn3kWyQmmUow4McVJYG7j2XZ40LHnKNE--otyXiOvYRNFr1gcj2CsATnI4BmelugO0YJ9CH8fqi1KIqX3WNC5xEsptACqp0M2ns3PiOI3inWsWXK4ricOQCU6DKur6ZMeLmvWiU5xliK8w7B=w641-h854-no


That naked / face-plate-less unit looks pretty sweet.
 
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Have replaced Pioneer proprietary plugs before... and usually get some questions about the process.

The area is tight... but it can be done. You have to profile the bases for overhanging the square hole to obtain the necessary clearances.

:needpics:

Pictures are better than words = here goes my attempt to share the process:
ACtC-3eZaIb4-nkkzdnI1KJHYasOiT3ik5pUkRbXzQg_DH4XgRy80T7aMiiOmd51sMymg0KWuaHMp10FzfQkCXanElKCmzmBEwoL1qdFII0Lwy9lyBlzWiI4FtBF_AN8S720Yd_x6XFeJ_WhlOzC8eCISfxg=w641-h854-no

ACtC-3dSZj6HrW4R2JTgMbGaoq4NqjfjX0fOdSr79W-p0cJgFah7K3WuaP8rvS1dXUVFXzazyxMzJQjLlMZcMX5S_MOf9eDd8f4KZjkCEaoy64PQ-V1Czm6c7bhy3dHBzvkkwshrsSduKndRWbGuuKLTNp8_=w641-h854-no

ACtC-3f8AOa5HaMGHuMhvHbDfYIV1is-bVg5mzXbPXUFGKk9B_N5rbeKIL_re0pGr9qkq4Q-0TIcvgXbFmz1IkH0YIiQXnBBwAWAmGVSslnnxb1vH9KGXAJ-TPLBxwxSl2GJL-MB-A_qdmJWY4omOTDe5Bf6=w641-h854-no

ACtC-3ee3R1fVGJTNd2W-ip4Q_YeyqotowM4J79mlmE5cPNWahg-4T03qhFPpSVGBxnoKyQqr1zUlv-CzeqIRrWnTcUlv0a-b7SkHnf5ITQujdq_43-SAkVN1nTGvPcfICYWfISI3SR9j5VhAFMAKOWsxrEO=w641-h854-no

ACtC-3e0hZj7cIopu4VZwrejEqz8Wn6a4s43FIAolIGiFPQ989xVJ-_Gd-xLoMumtu62r5Wub9Rm74weBQXh3yMvpH33jzyiPV6MY-qco2ERNgz7OwOWhw9zKWhrVb_Vk2lydwWWdvIR6mDQSid9XZ8MU4wE=w641-h854-no

ACtC-3etIaO2QIOEpaAng8vIA5nDwohV2nbu6DA8unT3noibaeTn3GB-pyHkO1gqAKrV2oXJZaHXfkQaQXQHgLBzp7xzpqsqY4XduHgij8DZ1WaY4X6qxM2lK7VitvVopqIAO5g8mSwvvyxJoRciBIUPE86Q=w641-h854-no

ACtC-3fPtsQhJSWGeSDT0H9E9S4Odt34TA64l4hG_TTkXqHRdpFdsxZrbn2HQ86Jkt2giBzmZQEY8fPH9cu1Quq02YUl9EgTuYyNuJIlqdtiIwajxqtnFlXcsdilGYT04M6PSn8vSaOWjH7tMGHazBzVNXp2=w641-h854-no

ACtC-3eeSjD4GVL9NMtS_f-9vN8TlL4_e-f3PbguX8wbXEvXQZolOnEA0NMQolGnLnTC9LppOD6x2K1j24VHIoUiFrlYXpzMj0NCmOh6f6jfq2nmaoKFwWuUOpS1auvVbooMuAMiSdHBHmdsBucbiX-_en4t=w1139-h854-no

ACtC-3dwl-wCuVzf3kO8CLsA23Da6l8UmzPBgAyGQhI1Fup-Gsa3M_KeWlI_ETrm-oBYdElQ4t6AJVG9cq4AcfgnXBj39IFwVqo1GRnHEd045xyM9pyv6jiGheS2VjwSYIlYO6dAjRCrq7eCQqVgI5IaH3B7=w641-h854-no

ACtC-3dZLFcOOZ00aAlpA7J0YQbM7rdP692xxdyGUootgShzdjDtAHD56k0d5W2u79eLKwRMRMHlQfAzTen4RsF7Ncsu1iUT-PHgq2xU7zL_kN-d00MONeYokNq0eJBLdgI3kZR3pNagb488XUGuHb7Wo3ra=w1139-h854-no

ACtC-3d2kiYaMvNFozD2Uy9vVl88dB1mMr6mUkSDVAdTUviWNUnJQ2CgLNBmgwK-U507GJUeZ2IXEx7XswCNYV5yAi1HkvGziVmpfjuuPmR_v_P_ZMrlugirFRqfZdhunFhfkTW6SzuPoahhIbc4Ubpl02yR=w641-h854-no

ACtC-3dpyMfdlmZQ7FU7ssL618CLKYovJjiOQ4Z00laOQLHm3LAcjrJVPNmEDYks6rEO2cr1SKb7dyzN4oOAOd30cjCephRGpIfAzejuycEJWK7cnaaw4JYXH93s0GjjGl5IkQxTRMye2tuEu3VuWyQpffSy=w641-h854-no

ACtC-3dtOtk3z5-XvRvwmZKjPlmR5lV8Qz6IP--YYPuA9ISi7SPs__ovBVjuAXGF0GKhTJUEX5WR_6-bJWD07qdGSreX_djOqrW1SEemZMy-w6CrmL_hVkkgWILE0jsMJTYOGlWVLzvPHflgxvO9G4AWQ-eM=w641-h854-no

ACtC-3elDH_9Swa6-WcdosCyEQVv8azgsvGM4ryn_5lM7Z7DJdPmlUmYH1RgwVCPYc14zkMhSNSW_t_ulaor0-4OSBPtw9kWgq36CxNee97-QIwu_3V8EJ4_dPTVZeig4e3O2hQmd92AKT-vwotWfKY8g1ZQ=w641-h854-no

ACtC-3cqq1U7IhE6vQ_Rx7Tf7Gb3lpAq-th2LAp-yU4V1EAV9l_9ZG8i7CaFwg9JkAWT-hN_MGvrca5MpD4OLg2HL5Pu3Qp1PP8K0A_LP3a-LTYQ9BqT7mdkhPcQjZpDZLu_1L1utHORNkejgrG00ohDW7lu=w641-h854-no
 
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C2 220 uF 10v Electro (CEA) Signal Meter 220 uF 16v UPW1C221MPD
Signal Meter / Function Coupling Capacitor

ACtC-3dZupdWmAnEmxdtb2RWkexZI2KAIdhEs72eYYtRoDEaP5Cg1-ZCPF6D82OcccgsN4JGrlo4mDFlPwmlifMOdDBkXC0QsuA3Prv0tEPDLpXh2s9KMa8nwqJznd0S4Y2hg_OnnIfJ3hwjRRegGhauAMPa=w641-h854-no


ACtC-3fBEqwhvDJ41UZU8f79ot3dgsKOAvC-H2pbAEGdidv1vfzez96X9gMEggKzTOUuJrkNDNswmYLndy1rTZKuDrw01YEHxbZuTBAt-NaKYmXnciyUP9IPQEECwtdor4RRo5b2Vwqskvl9HvmNzkkozjtc=w641-h854-no

ACtC-3dT2BSf-2U8wl9QiRgrElDLkzvJJU1fPh_-wseMQseGnW7JtdC1VX1iB72qt6dPjqt2semd2AhhqjGlaojc1sCcwNr-AJQyUrwa6hFtW2Qj7j6lnJRXAqokwdfOAa5Q2J7YE5n0gaiyfURNpKvmTgzY=w641-h854-no


ACtC-3eWR6Nq7_EibvVtmiswH5fq_5zWBb9XW2Vh1a7lEL9jE1yDyxfsjnSlXip1GCcsWJm2i2ye_toSDSEcN6MCF8gdAyAEkSfoiQizoET9szPsxBrIBBEcFrXDzHomu5Wf9Wvlqr8VEXGJnPb69FuA_0aR=w641-h854-no


ACtC-3e8Q5lQoRCRHmjsrBe9anOY68faBs3oXa97DXROKNoXKXyPijzemupGAdFbzmPSQlnEhDQZ1iKVTYvblbOs4I92PN5s3GToitfCVF9CcLOLoEaC7lFtMYelkRz7OLt9H9Rxe6o5mAyqhKJhnZqgs9J1=w641-h854-no


Will finish up this coming weekend... main and main coupling capacitors along with a couple trimmers
 
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On the control amp you replaced two of the green mylars, is there any particular reason that you changed those out?
I was of the understanding that the mylar caps are generally left alone. Is a film cap just a better performer than the mylars?
 
paultlaw said:
On the control amp you replaced two of the green mylars, is there any particular reason that you changed those out?
I was of the understanding that the mylar caps are generally left alone. Is a film cap just a better performer than the mylars?
Click to expand...

C1 and C2 are in the signal path... guess it could be debatable to some degree.

https://audiokarma.org/forums/index.php?threads/polypropylene-film-caps.733187/

Just elected to change these to some stock metallized polypropylene that I had.

https://industrial.panasonic.com/cdbs/www-data/pdf/RDI0000/ABD0000C202.pdf
 
Looks really good. However, check your tuning string again (make sure all pulleys are engaged). I found this one off track.............

626 tuner string routing.jpg
 
MIJ_Pioneer said:
Very nice! Your restores are getting more and more detailed. I bet it sounds fantastic. Great work!
Click to expand...

Thanks for the kind words.... your next rebuild should be a SX(x)2(X) SX(x)3(x) or SX1010. Think you would enjoy the series prior to the 50s. I sure do.

Yes the cap coupled sound is rich for sure.
 
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