pioneer sx-1010 help (left channel cuts out)

lawnerd

lawnerd

Active Member
I have a sx-1010. The left channel would cut. I thought it was a relay problem, so I replaced the relay.

But, the left channel still cuts in and out. Maybe for a few seconds to half a minute at most.

Any thoughts on troubleshooting? Thanks.
 
it's got 2sa726's and 2sc1451's in each channel. Get RID of them. Ksa992 and ksc3503 for replacements.

I'm expecting to go internet dark for a day or more, so others will explain as needed.
 
Mark is downright awesome (Heck, this is his list! :D) but the 2SA725's are in the Control amp and EQ boards as well. Order what you will need but the 1010 sounds fantastic when playing vinyl and the EQ will benefit with Marks list. Oh, The power supply should be rebuilt. Forgot to mention that. :D

Pioneer SX-1010:
Muting Assembly (AWM-039-A)

AWM-039-A: C1: .47uF 50v CEA: 667-ECQ-V1H474JL .47uF 50v
AWM-039-A: C2: 47uF 50v CEA: 647-UPW1H470MED 47uF 50v

Equalizer Amp Assembly (AWF-013-0)

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

Control Amp Assembly (AWG-027-0) (Check C49-52, can be 100uF 16v instead of 47uF 16v like the manual states)

AWG-027-0: C1: .33uF 25v: CSSA: 667-ECQ-V1H334JL .33uF 50v
AWG-027-0: C2: .33uF 25v: CSSA: 667-ECQ-V1H334JL .33uF 50v
AWG-027-0: C7: 100uF 10v CEA: 647-UPW1E101MED 100uF 25v
AWG-027-0: C8: 100uF 10v CEA: 647-UPW1E101MED 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 35v CEA: 647-UPW1V4R7MDD 4.7uF 35v
AWG-027-0: C16: 4.7uF 35v CEA: 647-UPW1V4R7MDD 4.7uF 35v
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: 647-UPW1E100MDD 10uF 25v
AWG-027-0: C26: 10uF 16v CEA: 647-UPW1E100MDD 10uF 25v
AWG-027-0: C29: 100uF 10v CEA: 647-UPW1E101MED 100uF 25v
AWG-027-0: C30: 100uF 10v CEA: 647-UPW1E101MED 100uF 25v
AWG-027-0: C31: 4.7uF 35v CEA: 647-UPW1V4R7MDD 4.7uF 35v
AWG-027-0: C32: 4.7uF 35v CEA: 647-UPW1V4R7MDD 4.7uF 35v
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: 647-UPW1E100MDD 10uF 25v
AWG-027-0: C42: 10uF 16v CEA: 647-UPW1E100MDD 10uF 25v
AWG-027-0: C45: 100uF 10v CEA: 647-UPW1E101MED 100uF 25v
AWG-027-0: C46: 100uF 10v CEA: 647-UPW1E101MED 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: 647-UPW1E470MDD 47uF 25v or 647-UPW1C101MED 100uF 16v
AWG-027-0: C50: 47uF 16v CEA or 100uF 16v CEA: 647-UPW1E470MDD 47uF 25v or 647-UPW1C101MED 100uF 16v
AWG-027-0: C51: 47uF 16v CEA or 100uF 16v CEA: 647-UPW1E470MDD 47uF 25v or 647-UPW1C101MED 100uF 16v
AWG-027-0: C52: 47uF 16v CEA or 100uF 16v CEA: 647-UPW1E470MDD 47uF 25v or 647-UPW1C101MED 100uF 16v

Q1: 2SA725: 512-KSA992FBU
Q2: 2SA725: 512-KSA992FBU

Power Amp Assembly (AWH-032-0) (Times two) (Check board number, the D version does not have the 1.5uF cap.)

AWH-032-0: C1: .68uF 25v CSSA: 667-ECQ-V1H684JL .68uF 50v
AWH-032-0: C2: 1.5uF 25v CSSA: 647-UKL1H1R5MDD1TA 1.5uF 50v
AWH-032-0: C4: 10uF 16v CEA: 647-UPW1E100MDD 10uF 25v
AWH-032-0: C8: 330uF 6.3v CEA: 647-UPW1A331MPD 330uF 10v

Q1: 2SA726: 512-KSA992FBU
Q2: 2SA726: 512-KSA992FBU
Q3: 2SA726: 512-KSA992FBU
Q5: 2SC1451: 512-KSC3503ESTU
Q6: 2SC1451: 512-KSC3503ESTU

Protection Assembly (AWM-062-0)

AWM-062-0: C1: .22uF 10v CSSA: 667-ECQ-V1H224JL2 .22uF 50v
AWM-062-0: C2: .22uF 10v CSSA: 667-ECQ-V1H224JL2 .22uF 50v
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

Q7: 2SC1384: 512-KSC2690AYS

Power Supply Assembly (AWR-054-0)

AWR-054-0: C8: 470uF 80v CEA: 647-UPW2A471MHD 470uF 100v
AWR-054-0: C9: 470uF 80v CEA: 647-UPW2A471MHD 470uF 100v
AWR-054-0: C10: 100uF 63v CEA: 647-UPW1J101MPD6 100uF 63v
AWR-054-0: C11: 100uF 63v CEA: 647-UPW1J101MPD6 100uF 63v
AWR-054-0: C12: 100uF 35v CEA: 647-UPW1V101MPD 100uF 35v
AWR-054-0: C13: 100uF 35v CEA: 647-UPW1V101MPD 100uF 35v
AWR-054-0: C14: 47uF 50v CEA: 647-UPW1H470MED 47uF 50v
AWR-054-0: C18: 1000uF 35v CEA: 647-UPW1H102MHD 1000uF 50v
AWR-054-0: C19: 220uF 16v CEA: 647-UPW1V221MPD6 220uF 35v
AWR-054-0: C20: 2200uF 10v CEA: 647-UPW1C222MHD 2200uF 16v
AWR-054-0: C21: 2200uF 10v CEA: 647-UPW1C222MHD 2200uF 16v

R11: 10 Ohm 1/4 watt: 660-MFS1/2DCT52R10R0 10 Ohm 1/2 watt
R12: 10 Ohm 1/4 watt: 660-MF1/4DCT52A10R0F 10 Ohm 1/2 watt
R20: 3.3 Ohm 1/4 watt: 660-MF1/2DCT52R3R32F 3.32 Ohm 1/2 watt
R21: 10 Ohm 1/4 watt: 660-MFS1/2DCT52R10R0 10 Ohm 1/2 watt

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

BOM List:

647-UPW1A331MPD | 4
647-UKL1H2R2KDDANA | 6
667-ECQ-V1H474JL | 1
647-UPW1C101MED | 4
647-UKL1H4R7KDDANA | 4
647-UPW1E101MED | 7
667-ECQ-V1H334JL | 2
667-ECQ-V1H224JL2 | 2
647-UPW1V101MPD | 2
647-UPW1V221MPD6 | 1
647-UPW1J101MPD6 | 2
647-UPW2A471MHD | 2
647-UPW1C222MHD | 2
647-UPW1H102MHD | 1
647-UPW1H470MED | 2
647-UPW1V4R7MDD | 5
647-UPW1E100MDD | 6
667-ECQ-V1H684JL | 2
647-UKL1H1R5MDD1TA | 2
647-UKL1E101KPDANA | 4
647-UKL1C471KPD | 2
647-UKL1C221KPDANA | 1
647-UKL1C100MDDANA | 2
512-KSA992FBU | 12
512-KSC3503ESTU | 4
512-KSC2690AYS | 2
512-KSA1013YBU | 2
863-MJE15032G | 2
863-MJE15033G | 1
512-KSC2383YBU | 2
 
To the OP - Zebulon knows what he speaketh.

I KNOW this, because I now enjoy his wonderfully restored 1010.

Thanks yet again, Zeb. And yes, it indeed sounds marvelous with vinyl.
 
SX-1010 offset voltage adjust awr-032 vr1
652-3296P-1-202LF 2Kohms 3296P Multi Turn : 12 3/8" Sealed parallel to pcb

sx-1010 idle current adjust awr-032 VR2
652-3386H-1-501LF 500ohms 3386H Single Turn 3/8" ? 10% parallel to pcb
 
Last edited:
As of June 2015, some parts have been discontinued at Mouser.
I suggest substitutes below. My opinion only. I'm looking forward to discussion. What does "CSSA" stand for?

Muting Assembly (AWM-039-A)

AWM-039-A: C1: .47uF 50v CEA: 667-ECQ-V1H474JL .47uF 50v (film)
Discontinued, use 647-UPW1HR47MDD (electrolytic)

Control Amp Assembly (AWG-027-0)

AWG-027-0: C1: .33uF 25v: CSSA: 667-ECQ-V1H334JL .33uF 50v
AWG-027-0: C2: .33uF 25v: CSSA: 667-ECQ-V1H334JL .33uF 50v
Discontinued, use 647-UKL1HR33KDDANA

Power Amp Assembly (AWH-032-0) (Times two)

AWH-032-0: C1: .68uF 25v CSSA: 667-ECQ-V1H684JL .68uF 50v
Discontinued, use 647-UKL1HR68MDD1TA

Q6: 2SC1451: 512-KSC3503ESTU (hFE 100-200)
Discontinued, use 512-KSC3503DSTU (hFE 60-120)

Protection Assembly (AWM-062-0)

AWM-062-0: C2: .22uF 10v CSSA: 667-ECQ-V1H224JL2 .22uF 50v
Discontinued, use 647-UKL1HR22KDDANA or 647-USV1HR22MFD

Power Supply Assembly (AWR-054-0)

Q3: 2SC869: 512-KSC2383YBU
Discontinued, use 512-KSC2383YTA (same except packaging)

A few requested parts are on back order. I suggest substitutes below.

Equalizer Amp Assembly (AWF-013-0)

AWF-013-0: C5: 470uF 6.3v CEANL: 647-UKL1C471KPD 470uF 16v
AWF-013-0: C6: 470uF 6.3v CEANL: 647-UKL1C471KPD 470uF 16v
Back-ordered, use 647-UKL0J471KPD (6.3V) etc (same lead spacing)
 
Harvested form a number of sources here on AK.


CEA are electrolytic radial caps
CEB are electrolytic axial caps
CEANL are low leakage electrolytic caps
CQSA are styrol caps
CKDYF, CKDYB, & CCDCH are all different ceramic disk types
CQPA & CQMA are different types of film caps i believe
CSZA & CSZAH are tantalum cap


Cap rules of thumb (nichicon)

I use upw, uhe for general caps including signal coupling in that order depending upon stock "cea"
I use ues, uep & uvp in that order for bipolar depending on stock
I use ukl for low leakage caps (in sensitive areas they reduce the noise floor)"ceanl", "cssa", "csza"
0.1uf to 2 uf I use stacked film where they fit: DFS and ECQ

solid aluminum and tantalum caps get stacked film when possible, or ukl's otherwise. "cssa" "csza"

c?B means it's an axial cap = one lead on each end
c?a = radial = both leads on one end
 
Go to the PIONEER Sticky's and download the Tuning fork Service Guides. will explain 99.999999999994/10% of what you need to know.
 
Thank you, elvi and larryderouin. I did not realize that the part type designators were straight out of the Pioneer parts list. This reveals that I have not studied that part of the manual, only the schematic proper. Oops. :withstpd:

For future reference, capacitor type prefixes are documented in Tuning Fork #2. I'd put that kind of note in a high-level sticky, but I'm a newb here and don't know how.

I'm wondering about the predilection for substituting film for electrolytic in small coupling caps. Larger caps are still electrolytic, and these make up most of the signal chain, so it's not going to improve audio quality noticeably. Is it a dislike of small electrolytics? Why? Or a case of "We can, so we will"? Or something else that hasn't occurred to me? (I'm not trying to argue, just understand.)

Thanks,
Dave
 
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