Project: Sansui AU-717 (BKs)

[lbcgav]

I agree
Not really, it was fine 40 years ago. - how do I know this? - I bought a new one in 1978, I still own it.

I'm sure he meant the "bug" comment as a joke about the cockroaches.

 

[peterott]

I'm sure he meant the "bug" comment as a joke about the cockroaches.

Yes, that was the intention

 

[Super Noob]

Getting Ready to Go Back to BK:

Decided to Go Back In and Clean Coupling Switch:

 

[MIJ_Pioneer]

Nice work! I may be in need of this info

Now that it is all said and done, if I was to go through this whole thread would there be anything worth clarifying adding? I plan on building a traditional list a bit later today, hopefully put in a mouser order

@Skywatcher

F-2670 – Pre-Amp Switch Board
C01-C04 – Originally 10uf 25v (polar caps in series for bipolar) / New 2.2 uF 450v Polypropylene Film (Panasonic ECW-FE2W225J)

These polypropylene fit no problem...

Quick question, I'm seeing a total of 20uf of capacitance per bipolar group, how come you used only 2.2uf?

 

[Super Noob]

Quick question, I'm seeing a total of 20uf of capacitance per bipolar group, how come you used only 2.2uf?

10 uf + 10 uf in series = 5 uf

You may want to review the basis of my rebuild = post #18

https://audiokarma.org/forums/index...estoration-upgrade-of-a-sansui-au-717.641945/

 

[MIJ_Pioneer]

10 uf + 10 uf in series = 5 uf

You may want to review the basis of my rebuild = post #18

https://audiokarma.org/forums/index...estoration-upgrade-of-a-sansui-au-717.641945/

Learn something new everyday

I saw the post, #18 - Very cool

 

[jojo0416]

Awesome restoration.
Did you replaced the resistors and diode because of corrosion or defective?

 

[Super Noob]

Awesome restoration.
Did you replaced the resistors and diode because of corrosion or defective?

All fuse resistors and glue affected ones. All diodes and Zeners mostly just cause I was in there.

 

[MIJ_Pioneer]

Order placed, $160 - Thanks for the BOM. Really wanted to use the Nichicon Gold filter caps but they were $25 a pop! MJE15032G is OOS at Mouser - Digikey has em. Probably will need a second order with this so I will wait until I get further along and realize I need something else.

Thanks for the BOM - Well documented/detailed. I noticed you updated your PDF/Word doc with the "updated" Power Supply etc changes after the first attempt correct?

Here is what I gathered, anything bold is my modification due to stock/voltage bump due to same size. Note can't guarntee its perfect, some of the cheapie $0.10 items have some extras included.

Filter: 4x ALT22A153DE063
4x: ECW-FE2W225J


F-2721 (Amp Driver Circuit Board) Right / Left Total (2) Double Below

D01-D04 – 1S2473 / Now 1N4148

ZD01-ZD02 – EQB01-22, 22v 1-Watt Zener Diode / Now 22v 1.3-Watt (BZX85B22-TR)

C02; C04 – Original 33uF 25v / Now 100uF 35v (Nichicon UPW1V101MPD)

C12 – Original 1uF 50v / Now 1uF 63v (WIMA MKS2C041001F00JA00)

C11 & C14 – Original 470uF 63v / Now 1000uF 63v (Nichicon UPW1J102MHD)

R15 – Original 10k Ohm ¼-Watt / Now 10k ½-Watt MBB02070C1002FC1 (1% Metal Film)

R16 – Original 27K Ohm 1/4 -Watt Carbon Resistor / Now 27K Ohm 1/4-Watt Metal Film (KOA Speer MF1/4DC2702F)

R23 & R25 – Original 150 Ohm Fusistor / Now 150 Ohm 1/4-Watt Metal Film (1% KOA Speer MF1/4DCT52A1500F)

TR01-TR02 – Original 2SC1400 ECB / Now KSC1845F (HFE Matched)

TR03-TR04 – Original 2SA750 (PNP) ECB / Now KSA992FB

TR05 & TR11 – Original 2SA899 / Now KSA1220AYS

TR06 & TR09 – Original 2SC945 / Now KSC945CY

TR07-TR08 – Original 2SC1904 / Now KSC2690AYS

TR12 – Original 2SD382 / Now MJE15032G

TR13 – Original 2SB537 / Now MJE15033G

VR1 – Original 100 Ohm Trim Resistor / Now 100 Ohm Single Turn Sealed 3/8” (Bourns 3386H-1-101LF)

VR2 – Original 2.2K Ohm Trim Resistor / Now 2.2K Ohm Single Turn Sealed 3/8” (Bourns 3386H-1-222LF)

VR3 – Original 1K Ohm Trim Resistor / Now 1K Ohm Single Turn Sealed 3/8” (Bourns 3386X-1-102LF)

4x Output transistor Micas 534-4636


F-2263 – Power Supply

C05-C08 – Original 220uF 63v / Now 820uF 63v (Nichicon UPW1J821MHD)

C09, C10, C11, C12 – Original 100uf 63v / Now 330uf 63v (Nichicon UPW1J331MHD)

C17-C18 – Original 470uF 16v / Now 470uf 25v (Nichicon UPW1E471MPD)

C19-C22 – Original .47uf 50v (LL) / Now .47uf 100v (WIMA MKS2D034701E00KSSD)

C23-C26 – Original 100uF/35v / Now 220uF 50v (Nichicon UPW1H221MPD)

C701- C704 – Original 15000uf 63v / Now 15000uF 63v KEMIT ALT22A153DE063 (85C 26k Hour)

C707- C710 – Bypass Caps Polyester Film 2.2uf 100v / New 2.2 uF 450v Polypropylene Film (Panasonic ECW-FE2W225J)

R7, R8, R9, R10, R11, R12, R13, R14 – Original 10k Ohm ¼-Watt / Now 10k ½-Watt 594-MBB02070C1002FC1 (1% Metal Film)

R33-R34 – Original 22k ¼-Watt / Now 22K ½ Watt 594-MBB02070C2202FCT (1% Metal Film)

D05-D12 – 10D2 1-Amp Diode / Now MUR220RLG, 2A / 200V Ultrafast Diode

D13-D18 – 1S2473D & 1S1588 Diode / Now 1N4148

D601 – D602, 10D2, 1-Amp Diode / Now MUR220RLG, 2A / 200V Ultrafast Diode

D603 – 1S2473D & 1S1588 Diode / Now 1N4148

D604 – VD1212 Varistor / Now Double (Series) 1N4148 Diodes

D605-D607 – 1S2473D Diode / Now 1N4148

D608 - Diode, 1A/100v, 10D1 (1S2226)): /1N4004T 1A/400V

D609-610 - VD1212 Varistor / Now Double (Series) 1N4148 Diodes

ZD01-ZD02 – RD13E (B) 13 V, ½ Watt, Zener / 13W, ½-Watt, Zener, 1N5243B

ZD601 – EQA01-06R, 5.6V, ½ Watt, Zener / 5.6W, ½-Watt, Zener, 1N5232B

ZD602 – RD13E Zener 6.2V, ½ Watt, Zener / 6.2W, ½-Watt, Zener, 1N5234C

TR01-TR2 – 2SD356 / Now MJE15032G

TR03-TR04 – 2SB526 / Now MJE15033G

TR05-TR06 & TR09-10 – 2SC1708 / Now KSC1845FB

TR07-TR08 & TR11-12 – 2SA847 / Now KSA992FB

TR601-TR603 & TR605-607 – 2SC945 / Now KSC945CY

TR604 – 2SA733 / Now KSA733CY

C601 – Original 47uF 50v / Now 100uf 63uF (Nichicon UPW1J101MPD)

C604 – Original 470µF 10V / Now 470uF 25v (Nichicon UPW1E471MPD)

C605 – Original 33uF 50v / Now 47uF 63v (Nichicon 647-UPW1J470MPD)

C606-C607 – Original 4.7µF 50V / Now 4.7uF 63v (Nichicon 647-UPW1J4R7MDD)

C29-C30 – Original 220µF 6.3V (bipolar) / Now 220uf 25v (Nichicon 647-UES1E221MHM)

Relay = Omron MY2-02-DC24


F-2720 –Tone Control

C05-C06 - Original 0.33uF Polyester Film / Now .33uF 450v Polypropylene Film Panasonic ECW-FE2W334J (5%)

C07-C08 – Listed 10pF Found 22pF Ceramic / Now 22pF 100v (C0G) RDE5C2A220J0M1H3A (5%)

C15-C16 – Original 10uF 16v / 10uF 35v (Nichicon 647-UKL1V100KDD1TA)

C21-C22 – Original 10uF 16v (signal) / 10uF /35v (Nichicon 647-UKL1V100KDD1TA) LeeStereo- Ben Prefers UES Here

C23-C24 – Original Listed 10pF Found 22pF / Now 22pf 100v (C0G) 5% RDE5C2A220J0M1H3A

C25-C26 – Original 0.47uF Polyester Film / Now to 0.47uF 250v Polypropylene Film WIMA MKP4F034704D00JB (5%)

C27+C29 & C28+C30 – Original 100uF 6.3v Polar In Series for Bi-Polar Configuration / Now Single 47uf 16v Nichicon UES1C470MPM (Bi-Polar)

C31 & C32 – Original .1 uF Film (bypass) / Removed

C33/C35 & C34/36 – Originally 4.7uF 50v (LL) in Series for Bi-Polar / Now Single 2.2 uF 450v Polypropylene Film Panasonic ECW-FE2W225J (5%)

C39-C42 – Original 47uF 50v / Now 220uF 50v (Nichicon UPW1H221MPD)

C45-C46 – Original 10uF 25v (LL) / 10uF /35v (Nichicon 647-UKL1V100KDD1TA)

D01-D02 – Original VD1212 Varistor / Now Double (Series) 1N4148 Diodes

R37-R40 – Original 82ohm ¼ Watt Fusitor / Now 82ohm ¼ Watt Metal Film KOA = MF1/4DCT52R82R0F (1%)

TR01-TR06 – Original 2SA726 (PNP) ECB / Now 512-KSA992FBU (HFE Match) TR1/TR5 & TR2/TR6

TR09-TR12 – Original 2SC1400 ECB / Now 512-KSC1845FTA

TR07-TR8, TR13-TR14 – Original 2SA750 (PNP) ECB / Now KSA992FB


F-2670 – Pre-Amp Switch Board

C01 - C04 – Originally 10uf 25v (polar caps in series for bipolar) / New 2.2 uF 450v Polypropylene Film (Panasonic ECW-FE2W225J)

ECW-FE2W225J | 2



F-2723 – Tone Control Board

C01-C02 – Original 1uF Polyester Film / Now 1uF 450v Polypropylene Film TDK B32672Z4105J00 (5%)

C03-C04 – Original 100pF Ceramic / Now 100 pF 100v Polypropylene Film WIMA FKP2D001001D00JO00 (5%)

C05-C06 – Original 220uF 6.3v / Now 470uf 25v Nichicon 647-UES1E471MHM (Leestero prefers Bi-Polar Here)

C19-C20 – Original 10uF 16v / Now 10uF 35v (Nichicon UKT1V100MDD)

C27+C29 & C28+C30 – Original 10uF/25V (LL) in Series / Now 4.7uf 63v Stack Polyester Film WIMA MKS2C044701M00JO00 (5%)

C31-C34 – Original 10uf 50v / Now 47uf 63v (Nichicon UPW1J470MPD)

D01-D04 – Original VD1212 Varistor / Now Double (Series) 1N4148 Diodes

R47-R50 – Original 82ohm ¼ Watt Fusitor / Now 82ohm ¼ Watt Metal Film KOA = MF1/4DCT52R82R0F (1%)

TR01-TR02, TR05-TR06 – Original 2SA906 (PNP) BCE / Now KSA992FB (HFE Match) TR1/TR5 & TR2/TR6

TR03-TR04 – Original 2SA726 (PNP) ECB / Now KSA992FB

TR09-TR10, TR15, TR16 – Original 2SA750 (PNP) ECB / Now KSA992FB

TR07-TR8, TR11-TR14 – Original 2SC1400 ECB / Now KSC1845F


BOM:

512-1N4148| 35

BZX85B22-TR | 4

UPW1V101MPD | 4

MKS2C041001F00JA00 | 2

UPW1J102MHD | 4

594-MBB02070C1002FC1 | 11

MF1/4DC2702F | 2

MF1/4DCT52A1500F | 4

512-KSC1845FTA | 19

512-KSA992FBU | 100

512-KSA1220AYS | 4

512-KSC945CYTA | 11

512-KSC2690AYS | 4

MJE15033G | 2

3386H-1-101LF | 2

3386H-1-222LF | 2

3386X-1-102LF | 2

534-4636 | 8

UPW1J821MHD | 2

UPW1J331MHD | 4

UPW1E471MPD | 3

MKS2D034701E00KSSD | 2

UPW1H221MPD | 6

667-ECW-FE2W225J | 12

594-MBB02070C2202FCT | 2

863-MUR220RLG | 5

621-1N4004 | 2

512-1N5243B | 3

512-1N5232B | 2

512-1N5234C | 2

512-KSA733CYTA | 1

UPW1J101MPD | 1

647-UPW1J470MPD | 5

647-UPW1J4R7MDD | 2

647-UES1E221MHM | 2

MY2-02-DC24 | 1

ECW-FE2W334J | 2

RDE5C2A220J0M1H3A | 4

UKL1V100KDDANA | 6

MKP4F034704D00JB | 2

UES1C470MPM | 4

MF1/4DCT52R82R0F | 8

B32672Z4105J000 | 2

FKP2D001001D00JO00 | 2

647-UES1E471MHM | 2

UKT1V100MDD | 2

MKS2C044701M00JO00 | 2


Out of Stock

MJE15032G | 2

 

[Karl vd Berg]

Getting Ready to Go Back to BK:

Very good job!
What type of paint did you use for the cover? RAL 7030?
I have another Sansui here with a pretty "beaten" top cover, and that paint you used looks nice, in contrast with front faceplate.

 

[Super Noob]

Nichicon Gold filter caps

Those Kemit main filters specs are awesome... go with Kemit.

 

[Super Noob]

What type of paint

https://www.lowes.com/pd/Rust-Oleum...VSNyGCh1cLAFtEAQYASABEgJkafD_BwE&gclsrc=aw.ds

 

[MIJ_Pioneer]

Can't edit the post a few days ago with the BOM - Here is an updated one, there were a few quantities missing. Got the MJE15032G's ordered from DigiKey. I will create my own thread moving forward, just dont want anyone to miss a few items:

BOM

512-1N4148| 35

BZX85B22-TR | 4

UPW1V101MPD | 4

MKS2C041001F00JA00 | 2

UPW1J102MHD | 4

594-MBB02070C1002FC1 | 11

MF1/4DC2702F | 2

MF1/4DCT52A1500F | 4

512-KSC1845FTA | 19

512-KSA992FBU | 100

512-KSA1220AYS | 4

512-KSC945CYTA | 11

512-KSC2690AYS | 4

MJE15033G | 4

3386H-1-101LF | 2

3386H-1-222LF | 2

3386X-1-102LF | 2

534-4636 | 8

UPW1J821MHD | 4

UPW1J331MHD | 4

UPW1E471MPD | 3

MKS2D034701E00KSSD | 4

UPW1H221MPD | 8

667-ECW-FE2W225J | 12

594-MBB02070C2202FCT | 2

863-MUR220RLG | 10

621-1N4004 | 2

512-1N5243B | 3

512-1N5232B | 2

512-1N5234C | 2

512-KSA733CYTA | 1

UPW1J101MPD | 1

647-UPW1J470MPD | 5

647-UPW1J4R7MDD | 2

647-UES1E221MHM | 2

MY2-02-DC24 | 1

ECW-FE2W334J | 2

RDE5C2A220J0M1H3A | 4

UKL1V100KDDANA | 6

MKP4F034704D00JB | 2

UES1C470MPM | 4

MF1/4DCT52R82R0F | 8

B32672Z4105J000 | 2

FKP2D001001D00JO00 | 2

647-UES1E471MHM | 2

UKT1V100MDD | 2

MKS2C044701M00JO00 | 2

MJE15032G | 4

 

[reardonp6]

Great Job!
My next project has just been made much easier!
Thanks
Pat

 

[MIJ_Pioneer]

Honestly, my boy BK deserves a FULLY rebuilt power supply too, so I went back in and reinforced it as well.

Lets do this.

TR601-TR603 & TR605-607 – 2SC945 / Now KSC945CY

#noregrets

KSC945 is a EBC - The original 2SC945 is ECB - Did you cross the legs on the new 945? I cant tell from this photo above. Working on it now, I am holding off. Would rather not cross the legs.

 

[AUD101]

Need KSC945C - these have the same pin config as the original 2SC945 (See last line of the KSC945 spec above)

 

[MIJ_Pioneer]

Need KSC945C - these have the same pin config as the original 2SC945 (See last line of the KSC945 spec above)

Awesome! I didnt read the fine print DOH! Thank you taking a look. Here are the ones I have, I believe I am good to go.

https://www.mouser.com/ProductDetail/512-KSC945CYTA
https://www.mouser.com/ProductDetail/512-KSA733CYTA

 

[AUD101]

Yep! - good to go -

 

[MIJ_Pioneer]

I did something here - Fully rebuilt the power supply -

R05, R06, R15, and R16 are getting hot and smoking. Anyone see anything?

Edit -Replaced them with spare 100hm resistors, still get hot and smoke.

R05 smokes whens on DBT within a few seconds. TR01 must be getting too much current... Strange all four resistors get hot... Tough one.



Schematic:

 

[Skywatcher]

I did something here - Fully rebuilt the power supply -

R05, R06, R15, and R16 are getting hot and smoking. Anyone see anything?

Edit -Replaced them with spare 100hm resistors, still get hot and smoke.

R05 smokes whens on DBT within a few seconds. TR01 must be getting too much current... Strange all four resistors get hot... Tough one.

View attachment 1757604 View attachment 1757565 View attachment 1757570 View attachment 1757571 View attachment 1757574 View attachment 1757587

Schematic:

View attachment 1757658 View attachment 1757659

Make sure none of the VD1212 replacements (you did replace them, right?) on the EQ board are shorting out against the one switch shaft. One of them is directly under the shaft in close proximity. That bit me once with the smoking resistor syndrome on the power board.