Pioneer sx 1010 - Tuner AM and FM is MUTE

havols

havols

Well-Known Member
Hello to all of audiokarma members
I've come to ask your help to fix a problem with my pioneer sx 1010.
This is a spectacular receiver. Great warm sound, and very powerfull
The aux and phono / mic functions are perfectly, and sounds great.
So, it had one problem on tuner. AM and FM section is completely mute.
There is no sound signal when I select AM or FM.
I'm not very experienced, but my guess would be some diode with a problem. But I could not trace what it might be.
But it could be another problem.
Could you help me find the problem?
Thank you all
 
Check for the 13 volts at the power supply board pin 8.
Check for the 13 volts at the muting assembly pin 3. AWM-039.
Check for the 13 volts at the Tuner assembly pin 26 and the Front end assembly pin "B".
 
Thanks for reply Zebulon

PIN 8 Power supply: 0 Volts DC
PIN 3 Muting Assembly: 0 VDC
PIN 26 Tuner Assembly: 0 VDC
Regards
 
The D10 wz140 seems to be open..
Maybe q7 to. I will check.
I will buy a substitute for D10.

Can I use a BD243C to replace 2SD313?
Regard
 
I did suggest checking any other pins on the Power supply but I should have.
Did you look for other voltages on the power supply?
 
Measured now:
PIN 8: 0 VDC
PIN 9: -13 VDC
PIN10: -57.2 VDC
PIN11: -23 VDC
PIN13: 35.2 VDC
PIN14: 57.3VDC
PIN15: 26.2 VDC
 
I'd still consider strongly rebuilding the power supply. Not familiar with the BD's.

Havols; Can you take a picture of the Power supply and post it for Zeb and me. Toasty black or still factory tan it still should be rebuilt. It's run at the ragged edge and this is the reason for the toasty black end around the heatsink. NEW uprated parts will make it heavier duty and able to take the strain of running at todays voltages with a fair amount of gusto.

Larry
 
OK Larry and Zeb
I will attached a picture when i get back home.
I tested the 2SD313 transistor with multimeter, and it appears good.
I did a recap on power supply (use Epcos and Nichicon Caps)
Regards
 
Good.
I had read other posts and threads of yours and learned you are a tube guy at heart.
You'll be money ahead rebuilding the Power Supply. If it least for the reliability.
 
Yeah Zeb
I really really appreciate the tubes from the 50s and 60s, mainly made in USA. Here in Brazil they are rare, and expensive. So it takes patience and attention to buy some with a just price.
But I like this earlier transistors too. Have fisher, sansui, marantz and pioneer.
Here, is hard to find a good technician to do a dedicated job on these amps and receivers. So lets go... do it myself.
I will check all the power supply of this 1010, and rebuild it.
Thank you again
Regards from Brazil
 
They are known to get toasty. Residing on the bottom of the set, upside down no less. Very few boards are missing the cutoff jumpers. To add insult, the boards tend to perforate at the far heatsink end and break the traces.
Your board doesn't look to bad. Rebuildable.
 
How can i rebuild it?
Checking and replace all altered components by new ones equivalents?
Just it?
Regards
 
Of course.
We have the list.
Looks like yours has newer caps diodes and transistors but one of the transistors I see is original.
Where do you purchase the components for repairing these vintage sets?
 
This is the SX-1010 ultimate list:
There will be obsolete components, although most are current, alternates are available.
A big thanks to MTF and Mattsd!

Muting Assembly (AWM-039-A)

AWM-039-A: C1: .47uF 50v CEA: 505-MKS2C034701CJSSD .47uF 50v
AWM-039-A: C2: 47uF 50v CEA: 647-UPW1H470MED 47uF 50v

Equalizer Amp Assembly (AWF-013-0) (Q1 & Q3 and Q2 & Q4 should ideally be gain matched, this is optional though)

AWF-013-0: C1: 2.2uF 25v CSSA: 647-UKL1H2R2KDDANA 2.2uF 50v
AWF-013-0: C2: 2.2uF 25v CSSA: 647-UKL1H2R2KDDANA 2.2uF 50v
AWF-013-0: C5: 470uF 6.3v CEANL: 647-UKL1C471KPD 470uF 16v
AWF-013-0: C6: 470uF 6.3v CEANL: 647-UKL1C471KPD 470uF 16v
AWF-013-0: C9: 100uF 6.3v CEANL: 647-UKL1E101KPDANA 100uF 25v
AWF-013-0: C10: 100uF 6.3v CEANL: 647-UKL1E101KPDANA 100uF 25v
AWF-013-0: C11: 10uF 10v CEANL: 647-UKL1C100MDDANA 10uF 16v
AWF-013-0: C12: 10uF 10v CEANL: 647-UKL1C100MDDANA 10uF 16v
AWF-013-0: C19: 100uF 25v CEANL: 647-UKL1E101KPDANA 100uF 25v
AWF-013-0: C20: 100uF 25v CEANL: 647-UKL1E101KPDANA 100uF 25v
AWF-013-0: C21: 220uF 16v CEANL: 647-UKL1C221KPDANA 220uF 16v

Q1: 2SA725: 512-KSA992FBU
Q2: 2SA725: 512-KSA992FBU
Q3: 2SA725: 512-KSA992FBU
Q4: 2SA725: 512-KSA992FBU
Q5: 2SC1313: 512-KSC1845FTA
Q6: 2SC1313: 512-KSC1845FTA
Q7: 2SC1313: 512-KSC1845FTA
Q8: 2SC1313: 512-KSC1845FTA

Control Amp Assembly (AWG-027-0) (Check C49-52, the A version of this board has them as 100uF 16v CEA instead of 47uF 16v CEA like the manual states)

AWG-027-0: C1: .33uF 25v: CSSA: 505-MKS20.33/63/5 .33uF 63v
AWG-027-0: C2: .33uF 25v: CSSA: 505-MKS20.33/63/5 .33uF 63v
AWG-027-0: C7: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-027-0: C8: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-027-0: C13: 2.2uF 25v CSSA: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-027-0: C14: 2.2uF 25v CSSA: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-027-0: C15: 4.7uF 50v CEA: 667-EEU-FC1H4R7 4.7uF 50v
AWG-027-0: C16: 4.7uF 50v CEA: 667-EEU-FC1H4R7 4.7uF 50v
AWG-027-0: C23: 4.7uF 25v CEANL: 647-UKL1H4R7KDDANA 4.7uF 50v
AWG-027-0: C24: 4.7uF 25v CEANL: 647-UKL1H4R7KDDANA 4.7uF 50v
AWG-027-0: C25: 10uF 16v CEA: 667-EEU-FC1H100L 10uF 50v
AWG-027-0: C26: 10uF 16v CEA: 667-EEU-FC1H100L 10uF 50v
AWG-027-0: C29: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-027-0: C30: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-027-0: C31: 4.7uF 50v CEA: 667-EEU-FC1H4R7 4.7uF 50v
AWG-027-0: C32: 4.7uF 50v CEA: 667-EEU-FC1H4R7 4.7uF 50v
AWG-027-0: C39: 4.7uF 25v CEANL: 647-UKL1H4R7KDDANA 4.7uF 50v
AWG-027-0: C40: 4.7uF 25v CEANL: 647-UKL1H4R7KDDANA 4.7uF 50v
AWG-027-0: C41: 10uF 16v CEA: 667-EEU-FC1H100L 10uF 50v
AWG-027-0: C42: 10uF 16v CEA: 667-EEU-FC1H100L 10uF 50v
AWG-027-0: C45: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-027-0: C46: 100uF 10v CEA: 667-EEU-FM1E101 100uF 25v
AWG-027-0: C47: 2.2uF 25v CSSA: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-027-0: C48: 2.2uF 25v CSSA: 647-UKL1H2R2KDDANA 2.2uF 50v
AWG-027-0: C49: 47uF 16v CEA or 100uF 16v CEA: 667-EEU-FM1E101 100uF 25v or 667-EEU-FM1E470 47uF 25v
AWG-027-0: C50: 47uF 16v CEA or 100uF 16v CEA: 667-EEU-FM1E101 100uF 25v or 667-EEU-FM1E470 47uF 25v
AWG-027-0: C51: 47uF 16v CEA or 100uF 16v CEA: 667-EEU-FM1E101 100uF 25v or 667-EEU-FM1E470 47uF 25v
AWG-027-0: C52: 47uF 16v CEA or 100uF 16v CEA: 667-EEU-FM1E101 100uF 25v or 667-EEU-FM1E470 47uF 25v

Q1: 2SA725: 512-KSA992FBU
Q2: 2SA725: 512-KSA992FBU
Q3: 2SC1313: 512-KSC1845FTA
Q4: 2SC1313: 512-KSC1845FTA
Q5: 2SC1313: 512-KSC1845FTA
Q6: 2SC1313: 512-KSC1845FTA
Q7: 2SC1313: 512-KSC1845FTA
Q8: 2SC1313: 512-KSC1845FTA

Power Amp Assembly (AWH-032-0) (Times two) (Check board number, the D version does not have the 1.5uF cap.) (Q1 and Q2 should ideally be gain matched, this is optional though)

AWH-032-0: C1: .68uF 25v CSSA: 505-MKS20.68/63/5 .68uF 50v
AWH-032-0: C2: 1.5uF 25v CSSA: 647-UKL1H1R5MDD1TA 1.5uF 50v (CHECK FOR THIS BEFORE ORDERING!!)
AWH-032-0: C4: 10uF 16v CEA: 647-UPW1E100MDD 10uF 25v
AWH-032-0: C8: 330uF 6.3v CEA: 647-UPW1A331MPD 330uF 10v


awh-032 C1 0.68 25 cssa 505-MKS2.68/50/10
awh-032 C2 1.5 25 cssa 647-UKL1H1R5MDD1TA
awh-032 C4 10 16 cea 647-UPW1E100MDD
awh-032 C8 330 6.3 cea 647-UPW1A331MPD

awh-032 Q1 2SA726 512-KSA992FBU
awh-032 Q2 2SA726 512-KSA992FBU
awh-032 Q3 2SA726 512-KSA992FBU
awh-032 q4 2sb528 ksa1220 / ksa1381
awh-032 Q5 2SC1451 512-KSC3503DSTU / KSC2690?
awh-032 Q6 2SC1451 512-KSC3503DSTU
awh-032 q7 2sd358 ksc2690
awh-032 q8 2sb528 ksa1220
awh-032 q9 2sc1448 ksc2073
awh-032 q10 2sa740 ksa940
awh-032 q11 2sc945 512-KSC1845FTA
awh-032 q12 2sa733 512-KSA992FBU

awh-032 D1 1S2473 512-IN4148
awh-032 D2 1S2473 512-IN4148
awh-032 D3 1S2472 512-UF4004
awh-032 D4 1S2472 512-UF4004
awh-032 D5 STV-3H X
awh-032 D6 STV-3H X
awh-032 D7 1S1885 512-UF4004
awh-032 D8 1S1885 512-UF4004

awh-032 VR1 2.2K multi T 652-3296P-1-202LF
awh-032 VR2 470 ohms 1T 652-3386H-1-501LF

VR1: 2.2K ohm multi offset: 652-3296P-1-202LF 2K ohm 25 turn
VR2: 470 ohm single bias: 652-3386H-1-501LF 500 ohm single turn

Protection Assembly (AWM-062-0)

AWM-062-0: C1: .22uF 10v CSSA: 505-MKS20.22/63/5 .22uF 63v
AWM-062-0: C2: .22uF 10v CSSA: 505-MKS20.22/63/5 .22uF 63v
AWM-062-0: C3: 330uF 6.3v CEA: 647-UPW1A331MPD 330uF 10v
AWM-062-0: C4: 330uF 6.3v CEA: 647-UPW1A331MPD 330uF 10v
AWM-062-0: C5: 4.7uF 25v CEA: 647-UPW1V4R7MDD 4.7uF 35v
AWM-062-0: C6: 100uF 16v CEA: 647-UPW1E101MED 100uF 25v

Q1: 2SC869: 512-KSC1845FTA
Q2: 2SC869: 512-KSC1845FTA
Q6: 2SC945: 512-KSC2383YTA
Q7: 2SC1384: 512-KSC2690AYS
1N4004 flyback diode is added between pins 9 (anode +) and 10 (cathode -)

Power Supply Assembly (AWR-054-0) (Resistors are optional but recommended, stand them up off the board about a half inch when mounting the new ones)

AWR-054: C8: 470uF 80v CEA: 647-UPW2A471MHD 470uF 100v
AWR-054: C9: 470uF 80v CEA: 647-UPW2A471MHD 470uF 100v
AWR-054: C10: 100uF 63v CEA: 647-UPW2A101MHD 100uF 100v
AWR-054: C11: 100uF 63v CEA: 647-UPW2A101MHD 100uF 100v
AWR-054: C12: 100uF 35v CEA: 647-UPW1H101MPD 100uF 50v
AWR-054: C13: 100uF 35v CEA: 647-UPW1H101MPD 100uF 50v
AWR-054: C14: 47uF 50v CEA: 647-UPW1J470MPD 47uF 63v
AWR-054: C18: 1000uF 35v CEA: 647-UPW1H102MHD 1000uF 50v
AWR-054: C19: 220uF 16v CEA: 647-UPW1V221MPD6 220uF 35v
AWR-054: C20: 2200uF 10v CEA: 647-UPW1C222MHD 2200uF 16v
AWR-054: C21: 2200uF 10v CEA: 647-UPW1C222MHD 2200uF 16v

AWR-054: R11: 10 Ohm 1/4 watt: 660-MFS1/2DCT52R10R0 10 Ohm 1/2 watt
AWR-054: R12: 10 Ohm 1/4 watt: 660-MFS1/2DCT52R10R0 10 Ohm 1/2 watt
AWR-054: R20: 3.3 Ohm 1/4 watt: 660-MF1/2DCT52R3R32F 3.32 Ohm 1/2 watt
AWR-054: R21: 10 Ohm 1/4 watt: 660-MFS1/2DCT52R10R0 10 Ohm 1/2 watt

AWR-054: Q1: 2SD313: 863-MJE15032G
AWR-054: Q2: 2SC869: 512-KSC2383YBU
AWR-054: Q3: 2SC869: 512-KSC2383YBU
AWR-054: Q4: 2SB507: 863-MJE15033G
AWR-054: Q5: 2SA628A: 512-KSA1013YBU
AWR-054: Q6: 2SA628A: 512-KSA1013YBU
AWR-054: Q7: 2SD313: 863-MJE15032G
AWR-054: Q8: 2SC1384: 512-KSC2690AYS

Main filter caps, 18000uF 63v, 50mm dia x 90mm high:

(Digi-Key) 565-3331-ND, 18000uF 75v screw terminal 50.80mm dia x 79.38mm high

BOM List (with 4 100uF 25v caps for the tone amp, does not include the filter caps or the 1.5uF cap, add if needed)

505-MKS2C034701CJSSD | 1
647-UPW1H470MED | 1
647-UPW2A471MHD | 2
647-UPW1H102MHD | 1
647-UPW1V221MPD6 | 1
647-UPW1C222MHD | 2
647-UPW1E101MED | 1
647-UPW1V4R7MDD | 1
647-UPW1A331MPD | 4
505-MKS20.22/63/5 | 2
647-UPW1E100MDD | 2
505-MKS20.68/63/5 | 2
647-UKL1H2R2KDDANA | 6
647-UKL1C471KPD | 2
647-UKL1E101KPDANA | 4
647-UKL1C221KPDANA | 1
647-UKL1C100MDDANA | 2
505-MKS20.33/63/5 | 2
647-UKL1H4R7KDDANA | 4
647-UPW2A101MHD | 2
647-UPW1J470MPD | 1
647-UPW1H101MPD | 2
667-EEU-FC1H4R7 | 4
667-EEU-FC1H100L | 4
667-EEU-FM1E101 | 10
512-KSC1845FTA | 12
512-KSA992FBU | 12
512-KSC3503DSTU | 4
512-KSA1220AYS | 4
512-KSC2690AYS | 4
512-KSA1013YBU | 2
512-KSC2383YTA | 3
863-MJE15032G | 2
863-MJE15033G | 1
660-MFS1/2DCT52R10R0 | 3
660-MF1/2DCT52R3R32F | 1
652-3296P-1-202LF | 2
652-3386H-1-501LF | 2
 
Last edited:
Thanks Zeb
I buy this components here in Manaus (amazon region).
Between the 70's and 90's, Manaus was the main gateway of imported electronics (made in japan and others) in Brazil. So, here still has a good movement in this area. Others I buy from São Paulo - SP. I also buy in Rio Grande do Sul state, which is where I was born, and I go there 2 times a year.
but here, good components are expensive
Well. I have a lot of work to do. I will poste the results in the next days
Thank you very much.
Best regards
 
WHOOOAAAA THERE!

zebulon1 said:
Muting Assembly (AWM-039-A)

AWM-039-A: C1: .47uF 50v CEA: 505-MKS2C034701CJSSD .47uF 50v
AWM-039-A: C2: 47uF 50v CEA: 505-MKS2C034701CJSSD 47uF 50v
Click to expand...

That is a .47uF cap, not a 47uF cap. :D The correct replacement for C2 is a 647-UPW1H470MED. I would also recommend using the Kemet stacked films for the caps under 1uF:

80-F612JF224J063A for the .22uF
80-F612JG334J063C for the .33uF
80-F612JG474J063C for the .47uF
80-F612JM684J063A for the .68uF

Everything else looks pretty good though!
 
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