Pioneer SX-1250 recap and restoration thread!

[jan_stevns]

Found myself a SX1250 here in Denmark

Found this old thread and even better - someone saved a SX1250 from the dumpster - it's mine now, and ready for some nursing.

Those receivers are huge ! even the heatsinks ...

 

[markthefixer]

Ok, here's a raw updated list, with ALMOST EVERYTHING POSSIBLE - you WILL NOT need all this. Every correction and stock check I can do and think of has been done.

I'm trying something different, making it easier to get this into a spreadsheet.
I am posting it as a comma delimited text block, where the commas are the field delimiters. a .csv file - in text...

DO NOT BLINDLY COPY AND PASTE THE PARTS LIST, YOU WILL OVERSPEND BY AT LEAST TWO EXTRA RELAYS ($20) AND SOME OTHER STUFF.

,,,,,,,,,
,,,,,,,,,
sx-1250,power,supply,stabilizer,ok,,,,,
sx-1250,awr-106,c1,220,80,cea,,220,100,647-UPW2A221MHD
sx-1250,awr-106,c2,220,80,cea,,220,100,647-UPW2A221MHD
sx-1250,awr-106,C5,47,35,cea,,47,35,647-UPW1V470MED
sx-1250,awr-106,C6,47,35,cea,,47,35,647-UPW1V470MED
sx-1250,awr-106,C7,22,50,cea,,22,50,647-UPW1H220MDD
sx-1250,awr-106,C8,22,50,cea,,22,50,647-UPW1H220MDD
sx-1250,awr-106,C9,100,35,cea,,100,50,647-UPW1H101MPD
sx-1250,awr-106,C10,100,35,cea,,100,50,647-UPW1H101MPD
sx-1250,awr-106,C11,47,80,cea,,47,100,647-UPW2A470MPD
sx-1250,awr-106,C12,47,80,cea,,47,100,647-UPW2A470MPD
sx-1250,awr-106,C13,1000,25,ceb,,1000,35,647-TVX1V102MCD
sx-1250,awr-106,C15,47,10,cea,,47,10,647-UPW1A470MDD6
sx-1250,awr-106,C16,22,10,cea,,22,10,647-UPW1A220MDD
sx-1250,awr-106,C17,220,16,cea,,220,25,647-UPW1E221MPD1TD
sx-1250,awr-106,C18,47,10,cea,,47,10,647-UPW1A470MDD6
sx-1250,awr-106,C19,47,10,cea,,47,10,647-UPW1A470MDD6
sx-1250,awr-106,q1,2sd313,pass +65,,,,,512-KSC2073TU
sx-1250,awr-106,q2,2sc869,darl,,,,,512-KSC2383YTA
sx-1250,awr-106,q3,2sc1318,err-amp,,,,,512-KSC1845FTA
sx-1250,awr-106,q4,2sc1384,pass +25,,,,,512-KSC2690AYS
sx-1250,awr-106,q5,2sb507,pass -65,,,,,512-KSA940TU
sx-1250,awr-106,q6,2sa628,darl,,,,,512-KSA1013YBU
sx-1250,awr-106,q7,2sa720,err-amp,,,,,512-KSA992FBU
sx-1250,awr-106,q8,2sa684,pass -25,,,,,512-KSA1220AYS
sx-1250,awr-106,q9,2sd325,pass +13,,,,,512-KSC2073TU
sx-1250,awr-106,q10,2sc945,darl,,,,,512-KSC2383YTA
sx-1250,awr-106,q11,2sc945,err-amp,,,,,512-KSC1845FTA
sx-1250,awr-106,q12,2sd325,pass +5.5 ,,,,,512-KSC2073TU
sx-1250,awr-106,q13,2sc945,darl,,,,,512-KSC2383YTA
sx-1250,awr-106,d1,wz-240,,,,,,512-1N5252B
sx-1250,awr-106,d3,wz-240,,,,,,512-1N5252B
sx-1250,awr-106,d5,wz-061,,,,,,512-1N5234B
sx-1250,awr-106,d2,1s2473,,,,,,512-1n4148
sx-1250,awr-106,d4,1s2473,,,,,,512-1n4148
sx-1250,awr-106,vr1,4.7k,1 turn,,,,,652-3386H-1-502LF
sx-1250,awr-106,vr2,4.7k,1 turn,,,,,652-3386H-1-502LF
sx-1250,awr-106,R13,680,2W mox,,,,,660-MO2C681J
sx-1250,awr-106,R14,1.5K,2W mox,,,,,660-MO2C152J
sx-1250,awr-106,R18,100,2W mox,,,,,660-MO2C101J
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
sx-1250,power,amp,left,ok,,,,,
sx-1250,awh-048l,C2,10,16,ceanl,,10,50,647-UKL1H100KDDANA
sx-1250,awh-048l,C5,220,16,ceanl,,220,16,647-UKL1C221KPDANA
sx-1250,awh-048l,C11,0.22,10,csza,,0.22,50,//////////////////////////////////////////667-ECQ-V1H224JL
sx-1250,awh-048l,C15,470,80,ACH-038,,470,100,647-UPW2A471MHD
sx-1250,awh-048l,C16,470,80,ACH-038,,470,100,647-UPW2A471MHD
sx-1250,awh-048l,q1,2sa750,,,,,,512-KSA992FBU
sx-1250,awh-048l,q2,2sa750,,,,,,512-KSA992FBU
sx-1250,awh-048l,q3,2sc1439,,,,,,512-KSC3503dstu
sx-1250,awh-048l,q4,2sc1439,,,,,,512-KSC3503dstu
sx-1250,awh-048l,q5,2sa858,,,,,,512-KSA1381ESTU
sx-1250,awh-048l,q6,2sa858,,,,,,512-KSA1381ESTU
sx-1250,awh-048l,q7,2sc1904,,,,,,512-KSC3503dstu
sx-1250,awh-048l,q8,2sa899,,,,,,512-KSA1381ESTU
sx-1250,awh-048l,q9,2sd610,,,,,,512-KSC2073TU
sx-1250,awh-048l,q10,2sb630,,,,,,512-KSA940TU
sx-1250,awh-048l,q11,2sc869,,,,,,512-KSC1845FTA
sx-1250,awh-048l,vr1,500 ohms,offset,25 turns,,,,652-3296P-1-501LF
sx-1250,awh-048l,vr2,500 ohms,idle,1 turn,,,,652-3386H-1-501LF
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
sx-1250,power,amp,right,ok,,,,,
sx-1250,awh-048r,C2,10,16,ceanl,,10,50,647-UKL1H100KDDANA
sx-1250,awh-048r,C5,220,16,ceanl,,220,16,647-UKL1C221KPDANA
sx-1250,awh-048r,C11,0.22,10,csza,,0.22,50,///////////////////////////////////////////////667-ECQ-V1H224JL
sx-1250,awh-048r,C15,470,80,ACH-038,,470,100,647-UPW2A471MHD
sx-1250,awh-048r,C16,470,80,ACH-038,,470,100,647-UPW2A471MHD
sx-1250,awh-048r,q1,2sa750,,,,,,512-KSA992FBU
sx-1250,awh-048r,q2,2sa750,,,,,,512-KSA992FBU
sx-1250,awh-048r,q3,2sc1439,,,,,,512-KSC3503dstu
sx-1250,awh-048r,q4,2sc1439,,,,,,512-KSC3503dstu
sx-1250,awh-048r,q5,2sa858,,,,,,512-KSA1381ESTU
sx-1250,awh-048r,q6,2sa858,,,,,,512-KSA1381ESTU
sx-1250,awh-048r,q7,2sc1904,,,,,,512-KSC3503dstu
sx-1250,awh-048r,q8,2sa899,,,,,,512-KSA1381ESTU
sx-1250,awh-048r,q9,2sd610,,,,,,512-KSC2073TU
sx-1250,awh-048r,q10,2sb630,,,,,,512-KSA940TU
sx-1250,awh-048l,q11,2sc869,,,,,,512-KSC1845FTA
sx-1250,awh-048r,vr1,500 ohms,offset,25 turns,,,,652-3296P-1-501LF
sx-1250,awh-048r,vr2,500 ohms,idle,1 turn,,,,652-3386H-1-501LF
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
sx-1250,protection,ok,,,,,,,
sx-1250,awm-091,C1,470,6,cea,,470,10,647-UPW1C471MPD6
sx-1250,awm-091,C2,470,6,cea,,470,10,647-UPW1C471MPD6
sx-1250,awm-091,C3,4.7,25,cea,,4.7,50,647-UPW1H4R7MDD
sx-1250,awm-091,C4,100,16,cea,,100,16,647-UPW1C101MED
sx-1250,awm-091,C5,100,50,cea,,100,50,647-UPW1H101MPD
sx-1250,awm-091,C6,100,50,cea,,100,50,647-UPW1H101MPD
sx-1250,awm-091,q1,2sc945,,diff,,,,512-KSC1845FTA
sx-1250,awm-091,q2,2sc945,,diff,,,,512-KSC1845FTA
sx-1250,awm-091,q3,2sa733,,or logic,,,,512-KSA992FBU
sx-1250,awm-091,q4,2sc945,,current dump,,,,512-KSC2383YTA
sx-1250,awm-091,q5,2sc1166,,relay drive,,,,512-KSC2690AYS
sx-1250,awm-091,q6,2sc1166,,v reg,,,,512-KSC2690AYS
sx-1250,awm-091,s1,asr-010,prot relay,,,,,653-my4-02dc24
,,,,,,,,,


grrr too long continued on next post

 

[markthefixer]

continued from last post

,,,,,,,,,
sx-1250,tuner,ok,,,,,,,
sx-1250,awe-068,C4,220,16,cea,,220,16,647-UPW1C221MPD
sx-1250,awe-068,C10,0.47,50,cea,,0.47,50,////////////////////////////////////////////////667-ECQ-V1H474JL
sx-1250,awe-068,C23,10,16,csza,,10,50,647-UKL1H100KDDANA
sx-1250,awe-068,C24,47,16,ceanl,,47,25,647-UKL1V470MPDANA
sx-1250,awe-068,C25,470,16,cea,,470,25,647-UPW1E471MPD
sx-1250,awe-068,C26,4.7,25,ceanl,,4.7,25,647-UKL1E4R7KDDANA
sx-1250,awe-068,C28,10,16,csza,,10,50,647-UKL1H100KDDANA
sx-1250,awe-068,C29,10,16,csza,,10,50,647-UKL1H100KDDANA
sx-1250,awe-068,C32,100,16,cea,,100,16,647-UPW1C101MED
sx-1250,awe-068,C33,1,50,cea,,1,50,647-UPW1H010MDD
sx-1250,awe-068,C35,0.1,35,csza,,0.1,50,////////////////////////////////////////////////598-DSF050J
sx-1250,awe-068,C36,1,25,ceanl,,1,50,647-UKL1H010KDDANA
sx-1250,awe-068,C38,1,25,ceanl,,1,50,647-UKL1H010KDDANA
sx-1250,awe-068,C41,1,10,csza,,1,50,647-UKL1H010KDDANA
sx-1250,awe-068,C42,3.3,10,csza,,3.3,50,647-UKL1H3R3KDDANA
sx-1250,awe-068,C43,0.22,25,csza,,0.22,50,//////////////////////////////////////////////667-ECQ-V1H224JL
sx-1250,awe-068,C48,4.7,25,ceanl,,4.7,25,647-UKL1E4R7KDDANA
sx-1250,awe-068,C56,10,16,csza,,10,50,647-UKL1H100KDDANA
sx-1250,awe-068,C59,0.1,35,csza,,0.1,50,/////////////////////////////////////////////////////598-DSF050J
sx-1250,awe-068,C60,220,16,cea,,220,16,647-UPW1C221MPD
sx-1250,awe-068,C61,47,16,ceanl,,47,25,647-UKL1V470MPDANA
,,,,,,,,,
,,,,,,,,,
sx-1250,equalizer,amp,ok,,,,,,
sx-1250,awf-021,C1,1,100,mylar,ecq,,,
sx-1250,awf-021,C2,1,100,mylar,ecq,,,
sx-1250,awf-021,C11,470,6,cea,,470,10,647-UPW1C471MPD6
sx-1250,awf-021,C12,470,6,cea,,470,10,647-UPW1C471MPD6
sx-1250,awf-021,C17,3.3,50,ceanl,,3.3,50,647-UKL1H3R3KDDANA
sx-1250,awf-021,C18,3.3,50,ceanl,,3.3,50,647-UKL1H3R3KDDANA
sx-1250,awf-021,C25,22,16,csza,,22,25,647-UKL1E220MDDANA
sx-1250,awf-021,C26,22,16,csza,,22,25,647-UKL1E220MDDANA
sx-1250,awf-021,C27,220,63,cea,,220,100,647-UPW2A221MHD
sx-1250,awf-021,C28,220,63,cea,,220,100,647-UPW2A221MHD
sx-1250,awf-021,C29,100,35,cea,,100,35,647-UPW1V101MPD
sx-1250,awf-021,C30,22,16,csza,,22,25,647-UKL1E220MDDANA
sx-1250,awf-021,C31,22,16,csza,,22,25,647-UKL1E220MDDANA
sx-1250,awf-021,C32,100,35,cea,,100,35,647-UPW1V101MPD
sx-1250,awf-021,q1,2sa726,ltp-L,,,,,512-KSA992FBU
sx-1250,awf-021,q2,2sa726,ltp-R,,,,,512-KSA992FBU
sx-1250,awf-021,q3,2sa726,ltp-L,,,,,512-KSA992FBU
sx-1250,awf-021,q4,2sa726,ltp-R,,,,,512-KSA992FBU
sx-1250,awf-021,q5,2sc1775,vas-L,,,,,512-KSC1845FTA
sx-1250,awf-021,q6,2sc1775,vas-R,,,,,512-KSC1845FTA
sx-1250,awf-021,q7,2sc1775,out dvr-L,,,,,512-KSC1845FTA
sx-1250,awf-021,q8,2sc1775,out dvr-R,,,,,512-KSC1845FTA
sx-1250,awf-021,q9,2sa872,out dvr-L,,,,,512-KSA992FBU
sx-1250,awf-021,q10,2sa872,out dvr-R,,,,,512-KSA992FBU
sx-1250,awf-021,q11,2sc1735,pass +49,,,,,512-KSC2690AYS
sx-1250,awf-021,q12,2sc869,err amp +,,,,,512-KSC1845FTA
sx-1250,awf-021,q13,2sa850,pass -49,,,,,512-KSA1220AYS
sx-1250,awf-021,q14,2sa628,err amp -,,,,,512-KSA992FBU
sx-1250,awf-021,d5,wz-240,,,,,,512-1N5252B
sx-1250,awf-021,d6,wz-240,,,,,,512-1N5252B
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
sx-1250,flat,amp,ok,,,,,,
sx-1250,AWG-042,C7,330,63,cea,,330,63,647-UPW1J331MHD
sx-1250,AWG-042,C8,330,63,cea,,330,63,647-UPW1J331MHD
sx-1250,AWG-042,C9,22,16,csza,,22,25,647-UKL1E220MDDANA
sx-1250,AWG-042,C10,22,16,csza,,22,25,647-UKL1E220MDDANA
sx-1250,AWG-042,C11,22,16,csza,,22,25,647-UKL1E220MDDANA
sx-1250,AWG-042,C12,22,16,csza,,22,25,647-UKL1E220MDDANA
sx-1250,AWG-042,C21,100,10,ceanl,,100,25,647-UKL1E101KPDANA
sx-1250,AWG-042,C22,100,10,ceanl,,100,25,647-UKL1E101KPDANA
sx-1250,AWG-042,C27,220,16,ceanl,,220,16,647-UKL1C221KPDANA
sx-1250,AWG-042,C28,220,16,ceanl,,220,16,647-UKL1C221KPDANA
sx-1250,AWG-042,C31,330,35,cea,,330,50,647-UPW1H331MPD
sx-1250,AWG-042,C32,330,35,cea,,330,50,647-UPW1H331MPD
sx-1250,AWG-042,q1,2sc1775,,,,,,512-KSC1845FTA
sx-1250,AWG-042,q2,2sc1775,,,,,,512-KSC1845FTA
sx-1250,AWG-042,q3,2sa872,,,,,,512-KSA992FBU
sx-1250,AWG-042,q4,2sa872,,,,,,512-KSA992FBU
sx-1250,AWG-042,q5,2sk30,,,,,,
sx-1250,AWG-042,q6,2sk30,,,,,,
sx-1250,AWG-042,q7,2sa725,,,,,,512-KSA992FBU
sx-1250,AWG-042,q8,2sa725,,,,,,512-KSA992FBU
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
sx-1250,control,amp,ok,,,,,,
sx-1250,AWG-041,C1,4.7,25,csza,,4.7,25,647-UKL1E4R7KDDANA
sx-1250,AWG-041,C2,4.7,25,csza,,4.7,25,647-UKL1E4R7KDDANA
sx-1250,AWG-041,C3,4.7,25,csza,,4.7,25,647-UKL1E4R7KDDANA
sx-1250,AWG-041,C4,4.7,25,csza,,4.7,25,647-UKL1E4R7KDDANA
sx-1250,AWG-041,C11,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C12,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C13,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C14,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C17,100,10,ACH-312,,100,16,647-UPW1C101MED
sx-1250,AWG-041,C18,100,10,ACH-312,,100,16,647-UPW1C101MED
sx-1250,AWG-041,C19,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C20,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C27,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C28,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C29,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C30,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C33,100,10,ACH-312,,100,16,647-UPW1C101MED
sx-1250,AWG-041,C34,100,10,ACH-312,,100,16,647-UPW1C101MED
sx-1250,AWG-041,C35,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C36,2.2,25,ceanl,,2.2,50,647-UKL1H2R2MDDANA
sx-1250,AWG-041,C37,100,16,ACH-311,,100,16,647-UPW1C101MED
sx-1250,AWG-041,C38,100,16,ACH-311,,100,16,647-UPW1C101MED
sx-1250,AWG-041,C39,100,16,ACH-311,,100,16,647-UPW1C101MED
sx-1250,AWG-041,C40,100,16,ACH-311,,100,16,647-UPW1C101MED
sx-1250,AWG-041,C43,10,25,csza,,10,50,647-UKL1H100KDDANA
sx-1250,AWG-041,C44,10,25,csza,,10,50,647-UKL1H100KDDANA
sx-1250,AWG-041,q1,2sc1312,,,,,,512-KSC1845FTA
sx-1250,AWG-041,q2,2sc1312,,,,,,512-KSC1845FTA
sx-1250,AWG-041,q3,2sc1312,,,,,,512-KSC1845FTA
sx-1250,AWG-041,q4,2sc1312,,,,,,512-KSC1845FTA
,,,,,,,,,
,,,,,,,,,
sx-1250,filter,amp,ok,,,,,,
sx-1250,AWM-089,C3,4.7,25,csza,,4.7,25,647-UKL1E4R7KDDANA
sx-1250,AWM-089,C6,10,25,csza,,10,50,647-UKL1H100KDDANA
sx-1250,AWM-089,c9,4.7,25,csza,,4.7,25,647-UKL1E4R7KDDANA
sx-1250,AWM-089,c12,10,25,csza,,10,50,647-UKL1H100KDDANA
sx-1250,AWM-089,q1,2sc1313,,,,,,512-KSC1845FTA
sx-1250,AWM-089,q2,2sc1313,,,,,,512-KSC1845FTA
,,,,,,,,,
,,,,,,,,,
sx-1250,fused,power,ok,,,,,,
sx-1250,AWR-107,C6,470,100,ceb,,470,100,647-TVX2A471MCD
sx-1250,AWR-107,C7,470,100,ceb,,470,100,647-TVX2A471MCD
sx-1250,AWR-107,C8,470,25,cea,,470,25,647-UPW1E471MPD
sx-1250,AWR-107,C9,470,25,cea,,470,25,647-UPW1E471MPD
,,,,,,,,,
,,,,,,,,,
sx-1250,chassis,s2,asr-015,soft start,relay,pcb mt,pins,,653-LY2-0-DC48
sx-1250,chassis,s2,asr-015,soft start,relay,NO mount,tabs,,653-LY2-DC48
,,,,,,,,,
sx-1250,chassis,s2,asr-015,soft start,relay,ears mount,tabs,,653-ly1f-dc48
sx-1250,chassis,,,soft start,ly1f mount,m-f standoff,,,728-FM2110-3005-SS | 2
sx-1250,chassis,,,soft start,ly1f mount,f-f standoff,,,728-FM1262-3005-SS | 2
,,,,,,,,,
,,,,,,,,,
sx-1250,function ,switch,assy,,,,,,
sx-1250,AWS-094,C1,220,6,cea,,220,6.3,647-UPW0J221MED
,,,,,,,,,

 

[tsd71]

Another awesome update. Thanks Mark

 

[CohibaJoe]

Another awesome update. Thanks Mark

Yes...Thanks Mark!!!!!!

Going over this now to put in a order....Picked up a Cherry SX-1250 last summer...This will be a Fall Recap.

 

[nailbunny7]

I have a really tough time reading the schematics for this online and I was hoping you guys could tell me what value transistor I would need for this board (I used the another persons photo because my camera is not good. circled red for the part I need to replace):

 

[mattsd]

That's my photo.

But seriously, that transistor you are pointing out is Q7, a 2SA720 PNP transistor that is used for an error feedback amp in the -65v regulator. Replacement from Mouser is 512-KSA992FBU.

 

[nailbunny7]

That's my photo.

But seriously, that transistor you are pointing out is Q7, a 2SA720 PNP transistor that is used for an error feedback amp in the -65v regulator. Replacement from Mouser is 512-KSA992FBU.

Awesome, thanks
It blew up when I turned on my receiver after it was recapped, so I think it may have just been faulty. I checked everything else on the receiver, and I am pretty sure there aren't any other problems. Will post photos when it's back together!

 

[markthefixer]

You'd better check q6, q5 AND q8 / C10 carefully and be absolutely SURE C6 or C8 aren't in backwards, by CHECKING the positive lead and what COMPONENTS it is connected to, because I'll bet you didn't check the board's marked polarity against the removed cap's polarity

THEN look for hairline board shorts from soldering.

Man, there are so many things I just do automatically that I no longer think about unless they show an error.

 

[nailbunny7]

You'd better check q6, q5 AND q8 / C10 carefully and be SURE C6 or C8 aren't in backwards.

THEN look for hairline board shorts from soldering.

Ok, I'll be sure to check that.
Btw, is there another place I can order that part (it's literally the only part I need) other than mouser? I don't really want to spend 20 on shipping for a 25 cent part (I also live in Canada)
EDIT: Nevermind, I just bit the bullet and ordered 10 of them in case I mess it up several times lol.

 

[nailbunny7]

Ok, I think I have everything installed right (I put in new Adcom 22'000uf 100v power caps, as well as the replacement transistor), but when I turned on the receiver after putting everything back together, the receiver wouldn't do anything (I think it went into protection mode). Is this possibly because of the new power caps? I thought they were just plug in and go, but now I'm not so sure. Is it possible I missed something?

 

[mattsd]

Ok, I think I have everything installed right (I put in new Adcom 22'000uf 100v power caps, as well as the replacement transistor), but when I turned on the receiver after putting everything back together, the receiver wouldn't do anything (I think it went into protection mode). Is this possibly because of the new power caps? I thought they were just plug in and go, but now I'm not so sure. Is it possible I missed something?

Please start your own thread so we can address your issues better. Thanks.

 

[CohibaJoe]

Ok, I think I have everything installed right (I put in new Adcom 22'000uf 100v power caps, as well as the replacement transistor), but when I turned on the receiver after putting everything back together, the receiver wouldn't do anything (I think it went into protection mode). Is this possibly because of the new power caps? I thought they were just plug in and go, but now I'm not so sure. Is it possible I missed something?

Please start your own thread so we can address your issues better. Thanks.

Yep....:yes:

 

[Jabroni1031]

Pioneer SX-1250 cap cover missing?

Hi All-
Just purchased a nice 1250 but when I opened her up I discovered one of the filter caps is missing its cover. This ok as is?

 

[omri617]

No!!
Open a new thread please and edit this one as "thread moved to Pioneer"

 

[top gun]

Please what is the BOM list

:scratch2::scratch2:

Excellent JT! :thmbsp: BTW, I thought it was an SX-850 that I sold you. :scratch2:

Here is my recap list for the SX-1250, I visually checked every board against the service manual and confirmed the caps for the the board numbers listed below, my 1250 was made Dec 1976. FYI I'm using a few Panasonic FM and FC caps in the preamp areas instead of PW caps.

Pioneer SX-1250 recap list

Equalizer Amp Board (AWF-021-A) (Q1 & 3 and Q2 & 4 should be gain matched)

AWF-021-A: C11: 470uF 6.3v CEANL: 647-UKL1C471KPD 470uF 16v
AWF-021-A: C12: 470uF 6.3v CEANL: 647-UKL1C471KPD 470uF 16v
AWF-021-A: C17: 3.3uF 50v CEANL: 647-UKL1H3R3KDDANA 3.3uF 50v
AWF-021-A: C18: 3.3uF 50v CEANL: 647-UKL1H3R3KDDANA 3.3uF 50v
AWF-021-A: C25: 22uF 16v CSZA: 647-UKL1V220KEDANA 22uF 35v
AWF-021-A: C26: 22uF 16v CSZA: 647-UKL1V220KEDANA 22uF 35v
AWF-021-A: C27: 220uF 63v CEA: 667-EEU-FC1J221 220uF 63v
AWF-021-A: C28: 220uF 63v CEA: 667-EEU-FC1J221 220uF 63v
AWF-021-A: C29: 100uF 35v CEA: 667-EEU-FM1H101 100uF 50v
AWF-021-A: C30: 22uF 16v CSZA: 647-UKL1V220KEDANA 22uF 35v
AWF-021-A: C31: 22uF 16v CSZA: 647-UKL1V220KEDANA 22uF 35v
AWF-021-A: C32: 100uF 35v CEA: 667-EEU-FM1H101 100uF 50v

Q1: 2SA726: 512-KSA992FBU
Q2: 2SA726: 512-KSA992FBU
Q3: 2SA726: 512-KSA992FBU
Q4: 2SA726: 512-KSA992FBU
Q5: 2SC1775: 512-KSC1845FTA:
Q6: 2SC1775: 512-KSC1845FTA:
Q7: 2SC1775: 512-KSC1845FTA:
Q8: 2SC1775: 512-KSC1845FTA:
Q9: 2SA872: 512-KSA992FBU
Q10: 2SA872: 512-KSA992FBU
Q11: 2SC1735: 512-KSC2383YTA
Q12: 2SC869: 512-KSC2383YTA
Q13: 2SA850: 512-KSA1013YBU
Q14: 2SA628A: 512-KSA1013YBU

Function Switch Board (AWS-094)

AWS-094: C1: 220uF 6.3v CEA: 667-EEU-FM1A221 220uF 10v

Flat Amp Board (AWG-042-0)

AWG-042-0: C7: 330uF 63v CEA: 667-EEU-FC1J331 330uF 63v
AWG-042-0: C8: 330uF 63v CEA: 667-EEU-FC1J331 330uF 63v
AWG-042-0: C9: 22uF 16v CSZA: 647-UKL1V220KEDANA 22uF 35v
AWG-042-0: C10: 22uF 16v CSZA: 647-UKL1V220KEDANA 22uF 35v
AWG-042-0: C11: 22uF 16v CSZA: 647-UKL1V220KEDANA 22uF 35v
AWG-042-0: C12: 22uF 16v CSZA: 647-UKL1V220KEDANA 22uF 35v
AWG-042-0: C21: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-042-0: C22: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-042-0: C27: 220uF 16v CEANL: 647-UKL1C221KPDANA 220uF 16v
AWG-042-0: C28: 220uF 16v CEANL: 647-UKL1C221KPDANA 220uF 16v
AWG-042-0: C31: 330uF 35v CEA: 667-EEU-FM1V331 330uF 35v
AWG-042-0: C32: 330uF 35v CEA: 667-EEU-FM1V331 330uF 35v

Q1: 2SC1775: 512-KSC1845FTA:
Q2: 2SC1775: 512-KSC1845FTA:
Q3: 2SA872: 512-KSA992FBU
Q4: 2SA872: 512-KSA992FBU
Q7: 2SA725: 512-KSA992FBU
Q8: 2SA725: 512-KSA992FBU

Control Amp Board (AWG-041-A)

AWG-041-A: C1: 4.7uF 25v CSZA: 647-UKL1H4R7KDDANA 4.7uF 50v
AWG-041-A: C2: 4.7uF 25v CSZA: 647-UKL1H4R7KDDANA 4.7uF 50v
AWG-041-A: C3: 4.7uF 25v CSZA: 647-UKL1H4R7KDDANA 4.7uF 50v
AWG-041-A: C4: 4.7uF 25v CSZA: 647-UKL1H4R7KDDANA 4.7uF 50v
AWG-041-A: C11: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C12: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C13: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C14: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C17: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-041-A: C18: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-041-A: C19: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C20: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C27: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C28: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C29: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C30: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C33: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-041-A: C34: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-041-A: C35: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C36: 2.2uF 50v CEANL: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-041-A: C37: 100uF 16v CEA: 667-EEU-FM1E101 100uF 25v
AWG-041-A: C38: 100uF 16v CEA: 667-EEU-FM1E101 100uF 25v
AWG-041-A: C39: 100uF 16v CEA: 667-EEU-FM1E101 100uF 25v
AWG-041-A: C40: 100uF 16v CEA: 667-EEU-FM1E101 100uF 25v
AWG-041-A: C43: 10uF 25v CSZA: 647-UKL1E100KDDANA 10uF 25v
AWG-041-A: C44: 10uF 25v CSZA: 647-UKL1E100KDDANA 10uF 25v

Q1: 2SC1312: 512-KSC1845FTA:
Q2: 2SC1312: 512-KSC1845FTA:
Q3: 2SC1312: 512-KSC1845FTA:
Q4: 2SC1312: 512-KSC1845FTA:

Filter Amp Board (AWM-089-0)

AWM-089-0: C3: 4.7uF 25v CSZA: 647-UKL1H4R7KDDANA 4.7uF 50v
AWM-089-0: C6: 10uF 25v CSZA: 647-UKL1E100KDDANA 10uF 25v
AWM-089-0: C9: 4.7uF 25v CSZA: 647-UKL1H4R7KDDANA 4.7uF 50v
AWM-089-0: C12: 10uF 25v CSZA: 647-UKL1E100KDDANA 10uF 25v

Q1: 2SC1313: 512-KSC1845FTA:
Q2: 2SC1313: 512-KSC1845FTA:

Power Amp Board (AWH-048-A) (This list times two for the two amp boards) (Q1 and 2 should be gain matched)

AWH-048-A: C2: 10uF 16v CEANL: 647-UKL1E100KDDANA 10uF 25v
AWH-048-A: C5: 220uF 16v CEANL: 647-UKL1C221KPDANA 220uF 16v
AWH-048-A: C11: .22uF 10v CSZA: 667-ECQ-V1H224JL2 .22uF 50v
AWH-048-A: C15: 470uF 80v CEA: 647-UPW2A471MHD 470uF 100v
AWH-048-A: C16: 470uF 80v CEA: 647-UPW2A471MHD 470uF 100v

Q1: 2SA750: 512-KSA992FBU
Q2: 2SA750: 512-KSA992FBU

VR1: 470 ohm multi offset: 652-3296P-1-501LF 25 turn
VR2: 470 ohm single bias: 652-3386H-1-501LF 1 turn

TO-3 micas (Need a total of 8): 534-4636

Protection Board (AWM-091-A)

AWM-091-A: C1: 470uF 6.3v CEA: 647-UPW1C471MPD 470uF 16v
AWM-091-A: C2: 470uF 6.3v CEA: 647-UPW1C471MPD 470uF 16v
AWM-091-A: C3: 4.7uF 35v CEA: 647-UPW1V4R7MDD 4.7uF 35v
AWM-091-A: C4: 100uF 16v CEA: 647-UPW1E101MED 100uF 25v
AWM-091-A: C5: 100uF 50v CEA: 647-UPW1H101MPD 100uF 50v
AWM-091-A: C6: 100uF 50v CEA: 647-UPW1H101MPD 100uF 50v

Q4: 2SC945: 512-KSC2383YTA
Q5: 2SC1166 (2SC1384): 512-KSC2690AYS
Q6: 2SC1166 (2SC1384): 512-KSC2690AYS

S1: ASR-010 MY4-02-DC24 relay: 653-MY2-02DC24

Stabilizer/Power Supply Board (AWR-106-A)

AWR-106-A: C1: 220uF 80v CEA: 647-UPW2A221MHD 220uF 100v
AWR-106-A: C2: 220uF 80v CEA: 647-UPW2A221MHD 220uF 100v
AWR-106-A: C5: 47uF 35v CEA: 647-UPW1H470MED 47uF 50v
AWR-106-A: C6: 47uF 35v CEA: 647-UPW1H470MED 47uF 50v
AWR-106-A: C7: 22uF 50v CEA: 647-UPW1J220MED 22uF 63v
AWR-106-A: C8: 22uF 50v CEA: 647-UPW1J220MED 22uF 63v
AWR-106-A: C9: 100uF 35v CEA: 647-UPW1H101MPD 100uF 50v
AWR-106-A: C10: 100uF 35v CEA: 647-UPW1H101MPD 100uF 50v
AWR-106-A: C11: 47uF 80v CEA: 647-UPW2A470MPD 47uF 100v
AWR-106-A: C12: 47uF 80v CEA: 647-UPW2A470MPD 47uF 100v
AWR-106-A: C13: 1000uF 25v CEB: 647-TVX1V102MCD 1000uF 35v
AWR-106-A: C15: 47uF 10v CEA: 647-UPW1C470MDD 47uF 16v
AWR-106-A: C16: 22uF 10v CEA: 647-UPW1C220MDD 22uF 16v
AWR-106-A: C17: 220uF 16v CEA: 647-UPW1V221MPD6 220uF 35v
AWR-106-A: C18: 47uF 10v CEA: 647-UPW1C470MDD 47uF 16v
AWR-106-A: C19: 47uF 10v CEA: 647-UPW1C470MDD 47uF 16v

Q1: 2SD313: 863-MJE15032G
Q2: 2SC869: 512-KSC2383YTA
Q3: 2SC1318: 512-KSC1845FTA
Q4: 2SC1384: 512-KSC2690AYS
Q5: 2SB507: 863-MJE15033G
Q6: 2SA628A: 512-KSA1013YBU
Q7: 2SA720: 512-KSA992FBU
Q8: 2SA684: 512-KSA1220AYS
Q9: 2SD325: 863-MJE15032G
Q10: 2SC945: 512-KSC2383YTA
Q11: 2SC945: 512-KSC1845FTA
Q12: 2SD325: 863-MJE15032G
Q13: 2SC945: 512-KSC2383YTA
TO-220 micas (need 2 of them): 534-4672

D1: WZ-240: 512-1N5252B
D2: 1S2473: 512-1N4148
D3: WZ-240: 512-1N5252B
D4: 1S2473: 512-1N4148
D5: WZ-061: 512-1N5234B
D6: 1S2473: 512-1N4148

VR1: 4.7K Ohms single turn: 652-3386H-1-502LF
VR2: 4.7K Ohms single turn: 652-3386H-1-502LF

Power Supply Board (AWR-107-0)

AWR-107-0: C6: 470uF 100v CEB: 647-TVX2A471MCD 470uF 100v
AWR-107-0: C7: 470uF 100v CEB: 647-TVX2A471MCD 470uF 100v
AWR-107-0: C8: 470uF 25v CEA: 647-UPW1V471MPD 470uF 35v
AWR-107-0: C9: 470uF 25v CEA: 647-UPW1V471MPD 470uF 35v

BOM List

647-UKL1C471KPD | 2
647-UKL1H4R7KDDANA | 6
647-UKL1H2R2KDDANA | 12
647-UPW1V4R7MDD | 1
647-UPW1V221MPD6 | 1
647-UPW1H101MPD | 4
647-UKL1H3R3KDDANA | 2
647-UKL1E100KDDANA | 6
667-ECQ-V1H224JL2 | 2
647-UPW2A471MHD | 4
647-UPW1E101MED | 1
647-UKL1V220KEDANA | 8
647-UKL1C221KPDANA | 4
667-EEU-FM1E101 | 10
667-EEU-FC1J221 | 2
667-EEU-FM1H101 | 2
667-EEU-FM1V331 | 2
667-EEU-FC1J331 | 2
667-EEU-FM1A221 | 1
647-UPW1C471MPD | 2
647-UPW1V471MPD | 2
647-UPW2A221MHD | 2
647-UPW1H470MED | 2
647-UPW2A470MPD | 2
647-UPW1C470MDD | 3
647-UPW1J220MED | 2
647-UPW1C220MDD | 1
647-TVX1V102MCD | 1
647-TVX2A471MCD | 2
512-KSA992FBU | 15
512-KSC1845FTA | 14
512-KSC2383YTA | 6
512-KSA1013YBU | 3
512-KSC2690AYS | 3
863-MJE15032G | 3
863-MJE15033G | 1
512-KSA1220AYS | 1
512-1N5252B | 2
512-1N4148 | 3
512-1N5234B | 1
534-4636 | 8
534-4672 | 2
653-MY2-02DC24 | 1
652-3296P-1-501LF | 2
652-3386H-1-501LF | 2
652-3386H-1-502LF | 2

 

[mattsd]

A Mouser BOM list, or Bill Of Materials list, is a simple list that takes all the parts of a certain kind and condenses them into a single line to make ordering easier. For instance, the 1250 uses 12 Nichicon 2.2uF 50v KL series caps. Imagine trying to type or copy those in, one per line so you could order them. That would get really old, really fast. So, the BOM list condenses them all down to a single line with the part number and quantity needed, like so: 647-UKL1H2R2KDDANA | 12. Saves you a whole lot of typing.

Most of the time you don't need to compile a list since it's already on here somewhere (though you will need to have the list you use vetted, as sometimes there are parts that need to be changed), all you have to do is copy the list and paste it here: Mouser Part List Importer You need to have an account with Mouser in order to use the tool. After you paste it in the text box, just select from the drop-down menu where you want the list to be imported to (your cart, a project list to save for later etc.) and click import. It then reads the list and import the parts and the quantities into the cart or wherever you import it to and it's ready to order!

 

[top gun]

Bom list

Thank You, Matt now it's time for me to get going on the rebuild, I'm just finishing a Sansui 1000a as my starter project and it has gone very well, I so appreciate the help on this site:thmbsp:

 

[zebulon1]

The reason I did not install bypass caps yet is because I'm burning in the caps that I've replaced then I'll add them later, I want to see what difference they make. As for the filter switches, I was able to clean them in place and they're working great.

Mattsd, What caps did you eventually use?

 

[markthefixer]

Main caps or bypass? the bypasses should be stacked film, panasonic ecq or cornell dublier dsf...