Pioneer sx-1010 amplifier board AWH-032-0 Transistors

[lopezluna]

Hi everyone. I have a pioneer sx-1010 that I am doing a restoration on. I have already restored all the boards except the amplifier boards awh-032-0. This receiver was all original and made in 1974. The question here is about transistor Q4 supposed to be a 2SB528 and it has a 2SA809. Also Q7 supposed to be 2SD358 and it has a 2SC1451. Now what do I replace Q4 and Q7 with? I know 2SC1451 get replaced with KSC3503 but shouldn't a KSC2690 go in Q7? And do I put a KSC1220 in Q4? This amp board has 2SC1451 transistors on Q5,Q6,Q7. Any help with the selection of transistors to use on Q4 and Q7 would be appreciated. @zebulon1 @Super Noob @larryderouin

 

[markthefixer]

from the bill of materials in the service manual:
pay attention to the - OR - s






Lots of those transistors on the old lists are going end of life, so there are changes:

replacement parts for SX-1010 power amplifier awh-032 (for one channel - double up to do both)
sx-1010 AWH032 amplifier board x 2 boards
Q1 Q2 Q3 2sa726 to-92 bce : 512-KSA992FBta (ln)to-92 ecb 120v .05a .5w 100mhz 150-800hfe $0.05 ea
Q4 2sb528 to-202? bce : 512-KSA1381estu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.53 ea
Q5 Q6 2sc1451 to-39 npn ebc : 512-KSC3503dstu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.46 ea


Q7 2sd358 to-202? bce : 512-KSC3503dstu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.46 ea
Q8 2sb528 to-202? bce : 512-KSA1381estu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.53 ea
Q9 2sc1448 to-220 bce P: 512-KSC2073TU npn to-220 bce 150v 1.5a 25w 4mhz 40-140hfe $0.54
Q10 2sa740 to-220 bce : 512-KSA940TU_Q pnp to-220 bce 150v 1.5a 25w 4mhz 40-140hfe $0.54
Q11 2sc945 to-92 ecb : 512-KSC1845EBU (ln)to-92 ecb 120v .05a .5w 100mhz 150-800hfe $0.05 ea
Q12 2sa733 to-92 ecb : 512-KSA992FBU (ln)to-92 ecb 120v .05a .5w 100mhz 150-800hfe $0.05 ea


512-KSA992fta F 300-600 (ln)to-92 ecb 120v .05a .5w 100mhz 300-600hfe $0.39 ea
512-KSA992fbu F 300-600 (ln)to-92 ecb 120v .05a .5w 100mhz 300-600hfe $0.37 ea
512-KSA992fata FA 300-470 (ln)to-92 ecb 120v .05a .5w 100mhz 300-600hfe $0.38 ea
512-KSA992fbta FB 430-600 (ln)to-92 ecb 120v .05a .5w 100mhz 300-600hfe $0.32 ea
512-KSC1845Fta F 300-600 (ln)to-92 ecb 120v .05a .5w 100mhz 300-600hfe $0.05 ea
P 200-400 F 300-600 FA 300-470 FB 430-600 E 400-800 U 600-1200


512-KSA1381estu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.53 ea
512-KSC3503dstu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.46 ea

512-KSA940TU pnp to-220 bce 150v 1.5a 25w 4mhz 40-140hfe $0.62
512-KSC2073TU npn to-220 bce 150v 1.5a 25w 4mhz 40-140hfe $0.66

 

[lopezluna]

from the bill of materials in the service manual:
pay attention to the - OR - s

View attachment 2813060




Lots of those transistors on the old lists are going end of life, so there are changes:

replacement parts for SX-1010 power amplifier awh-032 (for one channel - double up to do both)
sx-1010 AWH032 amplifier board x 2 boards
Q1 Q2 Q3 2sa726 to-92 bce : 512-KSA992FBta (ln)to-92 ecb 120v .05a .5w 100mhz 150-800hfe $0.05 ea
Q4 2sb528 to-202? bce : 512-KSA1381estu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.53 ea
Q5 Q6 2sc1451 to-39 npn ebc : 512-KSC3503dstu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.46 ea


Q7 2sd358 to-202? bce : 512-KSC3503dstu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.46 ea
Q8 2sb528 to-202? bce : 512-KSA1381estu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.53 ea
Q9 2sc1448 to-220 bce P: 512-KSC2073TU npn to-220 bce 150v 1.5a 25w 4mhz 40-140hfe $0.54
Q10 2sa740 to-220 bce : 512-KSA940TU_Q pnp to-220 bce 150v 1.5a 25w 4mhz 40-140hfe $0.54
Q11 2sc945 to-92 ecb : 512-KSC1845EBU (ln)to-92 ecb 120v .05a .5w 100mhz 150-800hfe $0.05 ea
Q12 2sa733 to-92 ecb : 512-KSA992FBU (ln)to-92 ecb 120v .05a .5w 100mhz 150-800hfe $0.05 ea


512-KSA992fta F 300-600 (ln)to-92 ecb 120v .05a .5w 100mhz 300-600hfe $0.39 ea
512-KSA992fbu F 300-600 (ln)to-92 ecb 120v .05a .5w 100mhz 300-600hfe $0.37 ea
512-KSA992fata FA 300-470 (ln)to-92 ecb 120v .05a .5w 100mhz 300-600hfe $0.38 ea
512-KSA992fbta FB 430-600 (ln)to-92 ecb 120v .05a .5w 100mhz 300-600hfe $0.32 ea
512-KSC1845Fta F 300-600 (ln)to-92 ecb 120v .05a .5w 100mhz 300-600hfe $0.05 ea
P 200-400 F 300-600 FA 300-470 FB 430-600 E 400-800 U 600-1200


512-KSA1381estu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.53 ea
512-KSC3503dstu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.46 ea

512-KSA940TU pnp to-220 bce 150v 1.5a 25w 4mhz 40-140hfe $0.62
512-KSC2073TU npn to-220 bce 150v 1.5a 25w 4mhz 40-140hfe $0.66

Thanks @markthefixer I just looked at parts list after your reply and saw where I did overlook the -or-. Now I can proceed and finish this restoration. Thanks again

 

[lopezluna]

I have successfully finished the restoration of my sx-1010 receiver. I restored the amp boards, tuner board, phono board, preamp board, protect board and power supply board. I also did adjustment to center the tuning meter and vr2 19khz. The last thing I did was remove the transformer cover to sand and paint. What a pain that was to put back together due to the washers, pressure washers, and nuts that go between the transformer and chassis. I have straightened up the two caps that I bumped while I was re-installing the transformer cover and were leaning next to the transformer. Thanks to everyone that contributes on this site and gives us less knowledgeable people advice and direction when needed.

 

[markthefixer]

Those pictures show a spiffing great job!!!!

 

[lopezluna]

Those pictures show a spiffing great job!!!!

Thanks, I read a lot and learn from guys like you on this site. Thanks again to all you

 

[jcnash]

View attachment 2817521 View attachment 2817522 I have successfully finished the restoration of my sx-1010 receiver. I restored the amp boards, tuner board, phono board, preamp board, protect board and power supply board. I also did adjustment to center the tuning meter and vr2 19khz. The last thing I did was remove the transformer cover to sand and paint. What a pain that was to put back together due to the washers, pressure washers, and nuts that go between the transformer and chassis. I have straightened up the two caps that I bumped while I was re-installing the transformer cover and were leaning next to the transformer. Thanks to everyone that contributes on this site and gives us less knowledgeable people advice and direction when needed.

Wow! Im going to use this as inspiration for my current SA-9800 restoration. Looks brand new! Great job!