Repairing a Vintage Pioneer SX-1010 Receiver: Power Supply and Protection

Repair of a vintage Pioneer SX-1010 receiver I purchased as a for parts/not working unit.
Parts list for regulated supply refresh (includes all caps, plus semiconductors for +- 56 v):
UBT1K471MHD1TN2 x2
UBT1H101MPD x2
UBT2A101MHD x2
UBT1J470MPD1TD x1
UBT1H102MHD x1
UBT1E221MPD8 x1
UBT1C222MHD x2
TIP41C x1
TIP42CG x1
KSC2383YTA x2
KSA1013YTA x2
1N5257B-TAP x2 (33v zener)

[@stinkenstine]

Excellent video on the Legendary SX-1010.

[@brannonmcevers1854]

Great job👍 working through the schematics and using proper logic to find the root of the problem. YT needs more techs like you to show proper electronics Ttroubleshooting

[@HipocratesAG]

Very nice trip by the schematic!! Awesome content.

[@josephsirois2353]

I’m working on a ten-ten currently with the same issues , thanks for the suggested parts list and video

[@danpeter5298]

I bought one in 1976 and still habe it.

[@heitortoledo6152]

hey man, thanks for this video, my receiver came back to life rsrsrsr (i'm from Brazil )

[@alexandres8846]

Good job and it is an obligation to change the electrolytic capacitors of devices over 20 years old.

[@woofer9588]

Did you ever do any more videos on the Pioneer SX-1010?

[@R.Akerman-oz1tf]

I suspected an "open". Well I got lucky due to poor soldered Xstr.

[@BinuMadhav]

Hi, Nice video. I have recaped my SX1010 and now its powering on, but relay is not actuating, so output is not there. What could be the possible problems? Kindly reply. Thanks in Advance.

[@musicstevecom]

Check all wire wraps they can easy break or come loose, also clean the back of the board which is a good time to check for bad solder joints, Bad traces and also re-solder the post which can have cracks in them, Also check for missed new leads that were forgot to solder, double check oration of parts replaced, Good luck

[@trangvuitinh9003]

Bạn phải thay thế điện trở r13 và điện trở r14 bằng nhau và bằng 1,5 k ohm như thế nguồn mới cân bằng + - 24v như nhà sản xuất thì hai điện trở này đang khác nhau r13 = 1,2 k ohm , r14 = 1,5k ohm như thế đo điện áp 24 v ko cân xứng . Và bạn phải thay tất các transistor loại a và visai a 726s trên bo công xuất và bo chỉnh âm sắc bass , tress , các tụ 2,2 mf nối tầng , bo bảo vệ , bo radio , b sẽ có môt máy thu tuyệt vời .

[@cyrilratnasuriya3593]

Pls send me Pioneer GM -222 car Amplifier mother Board Price available

[@user-xm6qb5cg4i]

2sc869 has many failures

[@reynir8448]

it's true

[@R.Akerman-oz1tf]

Just past 7 min, it was mentioned: axial replaced radial. Not sure how that would fit(from My viewpoint), but a treasure of a tutorial nonetheless.@@reynir8448

[@R.Akerman-oz1tf]

Duly noted retraction! If I had watched further(time is limited in My viewing) I can see @ the 30 min mark the actual dimensions. My deepest apologies. So sorry.

[@musicstevecom]

Very good video, Still Learning . Did you check the heat after you installed the Tip's? It cool at first than will heat up the board will actually heat up to 128 degrees to 158 wow that's hot? I have the same problem w some Pioneer SX-950 sx850 which has another 2sd313 for the lamps. I found that its not current that heats them up. Its the input of 40vac to 26vdc them to 13.5vdc and w mind also 40vac to 26vdc than a 100 ohm Resistor (Heater) cuts it down to 17.4vdc than to 2sd313 (Heater) to 5.4Vdc -6.4vdc After recap. looks like a bad design?