• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

SX-750 recap

I agree it has a parts list and that is where I got the information from but it does not have a "bill of materials".Now I'm not splitting hairs here but a "thing" is a "thing" unless otherwise named.Right?
Are you asking me to get the letter codes off the individual caps as I disassemble the unit because the letter codes are not listed in the service manual parts list,right?Or at least I do not see the letter codes other than what I already typed in.Of course I could be wrong and if I am please show me where.I'll do the work if you point me in the correct direction.
 
Now I see that you were actually asking me for the "part number" as well.You didn't actually ask for the part number but after going back to the "parts list" I see that some of the caps have the letter codes you are looking for.
So I will go back and add the letter codes into the list I compiled in post 17.
Now please tell me the story about Harry and his secretary?
 
Harry's secretary held (in his judgment) "hot" letters a day, then re-presented them to a somewhat cooled-down president to reconsider... saving the president from himself...

Then one day he was out sick, and the substitute wasn't aware of the procedure:

http://www.trumanlibrary.org/trivia/letter.htm


yeoooochhhhhh.....
 
Oh I see.I'll read the link after I fix supper here.
So was your secretary out for a few days or so?
I got the prefixes doc I just have to serve supper here.
I will edit them in later tonight.
I don't think you should be so hard on yourself about things typed in haste and having to repent forever.Its just me and I'm only trying to have some fun recapping an old reciever.We both want to do our best...that should be a given.
So take it easy on yourself and lets have some fun and see if we can learn something and at the same time make this 750 sing.
 
O.K. check out the list now.See how it looks.Let me know if there are any errors and how to correct them.
Thanks
 
I just fixed it, then did my stuff:
(I did NOT look for the 15000uf 50v caps - that's another can of worms.)


awm-094 c1 2.2 25v csza 2r2m 25 647-UKL1H2R2MDAANA 2.2 50
awm-094 c2 2.2 25v csza 2r2m 25 647-UKL1H2R2MDAANA 2.2 50
awm-094 c3 10 35v cea 100p 35 647-UPW1H100MDD1TD 10 50
awm-094 c5 100 35v cea 101p 35 647-UPW1H101MPD 100 50
awm-094 c7 1 25v csza 010m 25 647-UKL1H010KDDANA 1 50

awg-046 c1 0.47 25v cssa r47m 25 598-DSF050J474 0.47 50
awg-046 c2 0.47 25v cssa r47m 25 598-DSF050J474 0.47 50
awg-046 c3 100 6v cea 101p 6 647-UPW1A101MDD 100 10
awg-046 c4 100 6v cea 101p 6 647-UPW1A101MDD 100 10
awg-046 c7 220 35v cea 221p 35 647-UPW1V221MPD6 220 35
awg-046 c8 220 35v cea 221p 35 647-UPW1V221MPD6 220 35
awg-046 c9 4.7 25v ceanl 4r7p 25 647-UKL1H4R7KDDANA 4.7 50
awg-046 c10 4.7 25v ceanl 4r7p 25 647-UKL1H4R7KDDANA 4.7 50

awh-046 c1 1 25v csza 010m 25 647-UKL1H010KDDANA 1 50
awh-046 c2 1 25v csza 010m 25 647-UKL1H010KDDANA 1 50
awh-046 c7 220 6v cea 221p 6 647-UPW0J221MED 220 6.3
awh-046 c8 220 6v cea 221p 6 647-UPW0J221MED 220 6.3
awh-046 c9 100 35v cea 101p 35 647-UPW1H101MPD 100 50
awh-046 c10 100 35v cea 101p 35 647-UPW1H101MPD 100 50
awh-046 c13 220 6v cea 221p 6 647-UPW0J221MED 220 6.3
awh-046 c14 220 6v cea 221p 6 647-UPW0J221MED 220 6.3

awr-099 c1 0.22 10v cssa r22m 10 598-DSF050J224 0.22 50
awr-099 c2 0.22 10v cssa r22m 10 598-DSF050J224 0.22 50
awr-099 c3 330 6v cea 331p 6 647-UPW1A331MPD 330 10
awr-099 c4 330 6v cea 331p 6 647-UPW1A331MPD 330 10
awr-099 c5 3.3 10v cea 3r3p 10 647-UPW1H3R3MDD 3.3 50
awr-099 c6 220 16v cea 221p 16 647-UPW1C221MPD 220 16
awr-099 c7 220 16v cea 221p 16 647-UPW1C221MPD 220 16
awr-099 c8 100 35v cea 101p 35 647-UPW1H101MPD 100 50
awr-099 c9 100 50v cea 101p 50 647-UPW1H101MPD 100 50
awr-099 c10 100 50v cea 101p 50 647-UPW1H101MPD 100 50
awr-099 c11 4.7 35v cea 4r7p 35 647-UPW1H4R7MDD 4.7 50
awr-099 c12 220 16v cea 221p 16 647-UPW1C221MPD 220 16
awr-099 c13 100 35v cea 101p 35 647-UPW1H101MPD 100 50
awr-099 c15 100 50v cea 101p 50 647-UPW1H101MPD 100 50
awr-099 c16 100 50v cea 101p 50 647-UPW1H101MPD 100 50
awr-099 c17 330 50v cea 101p 50 647-UPW1H331MPD 330 50
awr-099 c18 330 50v cea 331p 50 647-UPW1H331MPD 330 50

awr-100 c1 470 10v cea 471p 10 647-UPW1E471MPD 470 16

awe-073 c27 0.47 50v cea r479 50 598-DSF050J474 0.47 50
awe-073 c41 100 16v cea 101p 16 647-UPW1H101MPD 100 50
awe-073 c42 220 16v cea 221p 16 647-UPW1C221MPD 220 16
awe-073 c45 4.7 16v csza 4r7m 16 647-UKL1H4R7KDDANA 4.7 50
awe-073 c46 1 25v csza 010m 25 647-UKL1H010KDDANA 1 50
awe-073 c47 3.3 10v csza 3r3m 10 647-UKL1H3R3KDDANA 3.3 50
awe-073 c48 0.22 35v csza r22m 35 598-DSF050J224 0.22 50
awe-073 c54 220 6v cea 221p 6 647-UPW0J221MED 220 6.3
awe-073 c60 4.7 35v cea 4r7p 35 647-UPW1H4R7MDD 4.7 50
awe-073 c61 47 6v cea 470p 6 647-UPW1A470MDD6 47 10
awe-073 c62 220 16v cea 221k 50 647-UPW1C221MPD 220 16
awe-073 c66 0.1 35v csza 0r1m 35 598-DSF050J 0.1 50
awe-073 c80 10 16v cea 100p 16 647-UPW1H100MDD1TD 10 50
awe-073 c81 10 16v cea 100p 16 647-UPW1H100MDD1TD 10 50
awe-073 c82 1 25v csza 010m 25 647-UKL1H010KDDANA 1 50
awe-073 c83 1 25v csza 010m 25 647-UKL1H010KDDANA 1 50
awe-073 c84 220 25v cea 221p 25 647-UPW1V221MPD6 220 35
awe-073 c85 220 25v cea 221p 25 647-UPW1V221MPD6 220 35
awe-073 c86 4.7 16v ceanlnp 4r7m 16 647-UKL1H4R7KDDANA 4.7 50
awe-073 c88 100 6v cea 101p 6 647-UPW1A101MDD 100 10
awe-073 c89 100 6v cea 101p 6 647-UPW1A101MDD 100 10
awe-073 c98 2.2 25v csza 2r2m 25 647-UKL1H2R2MDAANA 2.2 50
awe-073 c99 2.2 25v csza 2r2m 25 647-UKL1H2R2MDAANA 2.2 50
awe-073 c102 2.2 25v csza 2r2m 25 647-UKL1H2R2MDAANA 2.2 50
awe-073 c105 2.2 25v csza 2r2m 25 647-UKL1H2R2MDAANA 2.2 50
awe-073 c106 220 35v cea 221p 35 647-UPW1V221MPD6 220 35
awe-073 c111 10 16v cea 100p 16 647-UPW1H100MDD1TD 10 50

awk-065 c3 100 10v cea 101p 10 647-UPW1A101MDD 100 10



with a mouser account, you can cut and paste the whole block of text below this, into the BOM entry tool found in the EZ BUY section... there should be 67 caps.



598-DSF050J
598-DSF050J224
598-DSF050J224
598-DSF050J224
598-DSF050J474
598-DSF050J474
598-DSF050J474
647-UKL1H010KDDANA
647-UKL1H010KDDANA
647-UKL1H010KDDANA
647-UKL1H010KDDANA
647-UKL1H010KDDANA
647-UKL1H010KDDANA
647-UKL1H2R2MDAANA
647-UKL1H2R2MDAANA
647-UKL1H2R2MDAANA
647-UKL1H2R2MDAANA
647-UKL1H2R2MDAANA
647-UKL1H2R2MDAANA
647-UKL1H3R3KDDANA
647-UKL1H4R7KDDANA
647-UKL1H4R7KDDANA
647-UKL1H4R7KDDANA
647-UKL1H4R7KDDANA
647-UPW0J221MED
647-UPW0J221MED
647-UPW0J221MED
647-UPW0J221MED
647-UPW0J221MED
647-UPW1A101MDD
647-UPW1A101MDD
647-UPW1A101MDD
647-UPW1A101MDD
647-UPW1A101MDD
647-UPW1A331MPD
647-UPW1A331MPD
647-UPW1A470MDD6
647-UPW1C221MPD
647-UPW1C221MPD
647-UPW1C221MPD
647-UPW1C221MPD
647-UPW1C221MPD
647-UPW1E471MPD
647-UPW1H100MDD1TD
647-UPW1H100MDD1TD
647-UPW1H100MDD1TD
647-UPW1H100MDD1TD
647-UPW1H101MPD
647-UPW1H101MPD
647-UPW1H101MPD
647-UPW1H101MPD
647-UPW1H101MPD
647-UPW1H101MPD
647-UPW1H101MPD
647-UPW1H101MPD
647-UPW1H101MPD
647-UPW1H101MPD
647-UPW1H331MPD
647-UPW1H331MPD
647-UPW1H3R3MDD
647-UPW1H4R7MDD
647-UPW1H4R7MDD
647-UPW1V221MPD6
647-UPW1V221MPD6
647-UPW1V221MPD6
647-UPW1V221MPD6
647-UPW1V221MPD6

If for some reason it won't copy or cut from the forum page, quote it in a reply, THEN cut the text block clear and abandon the reply with quote.... voila - the text block...
 
Last edited:
Thank you mark.I copied the list of 67 caps into my mouser account but did not hit the buy key.I will wait for more infomation from you.
What are your thoughts on the two 15,000uF 50v caps?
Please explain why they are a can of worms?
 
Hey...I just noticed the irony of your comment mark about opening a can of "worms" and the link I just posted mentions "silkworms"! Ha...made me laugh.
 
gyrene said:
Thank you mark.I copied the list of 67 caps into my mouser account but did not hit the buy key.I will wait for more infomation from you.
What are your thoughts on the two 15,000uF 50v caps?
Please explain why they are a can of worms?
Click to expand...

Different physical sizes, and dimensions/methods of electrical connection to them.
 
Lets bring this thing back to life!

I'm going to re-cap my own 750 and the capacitor list in this thread is extremely helpful. I haven't bought anything or searched the parts yet, but I don't expect it to be too difficult even though it has been 4 years and parts may have changed.

One of the first things I noticed when taking this thing apart is that it's a pain in the butt to get to the boards! The SX-636 I re-capped last week was CAKE compared to this thing. I'm going to have to get creative in how I position this thing when undoing and redoing solder joints.

The main reason I'm bringing this thread back to life is I have questions regarding transistors. When I restored my SX-636, I replaced almost all of the tiny black transistors on the circuit boards. Should I do the same for the SX-750? If so, how do I know which transistors to buy? It's easy with capacitors...just a voltage and a capacitance with a few other easy rules. With transistors, am I going to have to look up each old part number, read the specs, and find a new equivalent Fairchild model? That sounds like more work that it's worth to me. I use the brand name Fairchild because all of the transistor replacements suggested in the old SX-636 thread I used were Fairchild, so I'm assuming they make the best stuff.
 
aidanhunter said:
Lets bring this thing back to life!

I'm going to re-cap my own 750 and the capacitor list in this thread is extremely helpful. I haven't bought anything or searched the parts yet, but I don't expect it to be too difficult even though it has been 4 years and parts may have changed.

One of the first things I noticed when taking this thing apart is that it's a pain in the butt to get to the boards! The SX-636 I re-capped last week was CAKE compared to this thing. I'm going to have to get creative in how I position this thing when undoing and redoing solder joints.

The main reason I'm bringing this thread back to life is I have questions regarding transistors. When I restored my SX-636, I replaced almost all of the tiny black transistors on the circuit boards. Should I do the same for the SX-750? If so, how do I know which transistors to buy? It's easy with capacitors...just a voltage and a capacitance with a few other easy rules. With transistors, am I going to have to look up each old part number, read the specs, and find a new equivalent Fairchild model? That sounds like more work that it's worth to me. I use the brand name Fairchild because all of the transistor replacements suggested in the old SX-636 thread I used were Fairchild, so I'm assuming they make the best stuff.
Click to expand...

:nono:

there is a sx-750 cap list but no transistors on it.

IF you rely on enie - menie - mienie - moe - transistor substitutions, it will bite you on the tukus - and I will not help unbite it.

BUT if you WAIT for me to REVERSE ENGINEER the circuits and make sure the substitutes are correct FOR THE CIRCUIT CONDITIONS, you shouldn't have any problem - because I know most of the problems to look for.

just because you see something similar in AK, doesn't mean it is correct. My MODEL SPECIFIC transistor substitution lists started this whole thing, other people expanded with ennie-menie's . then to do additional ennie-menies on the ennie-menies is really asking for problems.

stuff like transistor gain, transistor speed, appropriate filtering and taming of high speed transistors etc... and "bite" = mysteriously letting out the magic smoke...
 
Last edited:
Now, all that said, you CAN speed the process along, make and post a list of the transistors in the sx-750, using the same format as the capacitor lists:
zzz-999 board number, qx designation(q1 -q??) OR DIODE designations (including zeners) , part number.

That will save me a LOT of time and transcribing, and will be a REAL, tangible help in accelerating the process.

And the stuff I do to arrive at the list, it's called electronics engineering, a fun little thing called reverse engineering. Where I try to spot where they cut things too close, and that resulted in long term UNreliability...
 
Under semiconductors there are items with description "IC." What does that stand for? Should I include them on the list?
 
"Integrated Circuits" probably don't need to be replaced. That's a good thing, since some of them are not available.

Also, you may want to skip over any transistors in the FM front end section. Focus on the transistors in the phono/mic preamp area, tone amp, flat amp, and final/power amp sections.
 
Integrated Circuit, won't be replaced, doesn't HAVE to be on the list, but I can deal with it being there.. :D

just transistors, diodes, electrolytic capacitors (cea, cssa, csza, ceanl, ceb), trim pots (vr1 semi-fixed)

by board (zzz-999)
 
Last edited:
EDITED: Here's the list of semiconductors and electrolytic capacitors for the SX-750. If a semiconductor wasn't a transistor or a diode, it was noted in parentheses after the part number. I have two separate lists posted: one of semiconductors and one of capacitors. This is because the semiconductor list had two columns and the capacitor list had four. For AWE-073, I threw in VC1 and TC6 just for the hell of it. I'm not sure if they're parts that are worth replacing or not.





SEMICONDUCTORS:

AWM-094 Filters & Muting Assembly
Symbol Part Number
Q1 2SA733-Q
Q2 2SA733-Q
Q3 2SC945-R
Q4 2SC945-R
Q5 2SC945-R
D1 1S2473
D2 1S2473

AWG-046 Tone Control Assembly
VR1 ACV-138 (Bass)
VR2 ACV-138 (Treble)

AWH-046 Power Amplifier Assembly
Q1 2SA798-F
Q2 2SA798-F
Q3 2SC1438-V
Q4 2SC1438-V
Q5 2SD357-C
Q6 2SD357-C
Q7 2SB527-C
Q8 2SB527-C
D1 1S2473
D2 1S2473
D3 STV4H
D4 STV4H

AWR-099 Power Supply & Protection Assembly
Q1 2SC1649-N or 2SC869-C
Q2 2SC1649-N or 2SC869-C
Q3 2SC1647-P or 2SC945-A
Q4 2SC1647-P or 2SC945-A
Q5 2SA823-P or 2SA733-Q
Q6 2SC1647-P or 2SC945-A
Q7 2SC1167-Y or 2SC1384-R
Q8 2SD313-D
Q9 2SC945-Q
Q10 2SD313-D
Q11 2SC945-Q
Q12 2SB507-D
D1 1S1554
D2 1S1554
D3 1S1554
D4 1S1554
D5 1S1555
D6 1S1555
D7 1S1555
D8 1S1554
D9 1S1555
D10 WZ-140 (Zener)
D11 WZ-240 (Zener)
D12 WZ-140 (Zener)

AWR-100 Power Supply Assembly
D1 1S1885
D2 1S1886
D3 1S1886
D4 1S1886
D5 1S1886
D6 SR3AM-8
D7 SR3AM-8
D8 SR3AM-8
D9 SR3AM-8

AWE-073 Tuner, AF & Control Assembly
Q2 2SC535-B
Q3 2SC717
Q11 2SA725-G
Q12 2SC1344-D or 2SC1345-D
Q13 2SA733-Q
D1 1S2076
D2 1S2076
D3 1S2076
D4 1S2076
D5 1S188FM-1
D6 1S188FM-1
D7 1S2076
D8 1S2076
D9 1S2076
D10 1S2076
D11 1S2076
D12 WZ-192 (Zener)
D13 WZ-210 (Zener)
VR1 C92-048 (Semi-fixed, 47k-B)
VR2 ACP-055 (Semi-fixed, 4.7k-B)
VR3 C92-047 (Semi-fixed, 100k-B)
VR4 ACV-135 (Balance)
VR5 ACV-179 (Volume)

AWK-065 Amplifier Assembly
Q1 2SA725-G (2SA640-E)
Q2 2SA725-G (2SA640-E)
Q3 2SC1313-G
Q4 2SA726-G (2SA640-E)



------



CAPACITORS:

AWM-094 Filters & Muting Assembly
Symbol Capacitance (u) Voltage Part Number
C1 2.2 25V CSZA 2R2M 25
C2 2.2 25V CSZA 2R2M 25
C3 10 35V CEA 100P 35
C5 100 35V CEA 101P 35
C7 1 25V CXZA 010M 25

AWG-046 Tone Control Assembly
C1 0.47 25V CSSA R47M 25
C2 0.47 25V CSSA R47M 25
C3 100 6V CEA 101P 6
C4 100 6V CEA 101P 6
C7 220 35V CEA 221P 35
C8 220 35V CEA 221P 35
C9 4.7 25V CEANL 4R7P 25
C10 4.7 25V CEANL 4R7P 25

AWH-046 Power Amplifier Assembly
C1 1 25V CSZA 010M 25
C2 1 25V CSZA 010M 25
C7 220 6V CEA 221P 6
C8 220 6V CEA 221P 6
C9 100 35V CEA 101P 35
C10 100 35V CEA 101P 35
C13 220 6V CEA 221P 6
C14 220 6V CEA 221P 6

AWR-099 Power Supply & Protection Assembly
C1 0.22 10V CSSA R22M 10
C2 0.22 10V CSSA R22M 10
C3 330 6V CEA 331P 6
C4 330 6V CEA 331P 6
C5 3.3 10V CEA 3R3P 10
C6 220 16V CEA 221P 16
C7 220 16V CEA 221P 16
C8 100 35V CEA 101P 35
C9 100 50V CEA 101P 50
C10 100 50V CEA 101P 50
C11 4.7 35V CEA 4R7P 35
C12 220 16V CEA 221P 16
C13 110 35V CEA 101P 35
C15 100 50V CEA 101P 50
C16 100 50V CEA 101P 50
C17 330 50V CEA 331P 50
C18 330 50V CEA 331P 50

AWR-100 Power Supply Assembly
C1 470 10V CEA 471P 10
C2 0.01 250V ACG-001
C3 0.01 250V ACG-001
C4 0.01 250V ACG-001
C5 0.01 250V ACG-001
C6 0.01 250V ACG-001
C7 0.01 250V ACG-001

AWE-073 Tuner, AF & Control Assembly
C27 0.01 50V CEA R47P 50
C41 100 16V CEA 101P 16
C42 220 16V CEA 221P 16
C45 4.7 16V CSZA 4R7M 16
C46 1 25V CSZA 010M 25
C47 3.3 10V CSZA 3R3M 10
C48 0.22 35V CSZA R22M 35
C54 220 6V CEA 221P 6
C60 4.7 35V CEA 4R7P 35
C61 47 6V
C62 220 16V
C66 0.1 35V
C80 10 16V
C81 10 16V CEA 100P 16
C82 1 25V CSZA 010M 25
C83 1 25V CSZA 010M 25
C84 220 25V CEA 221P 25
C85 220 25V CEA 221P 25
C86 4.7 16V CEANL 4R7M16NP
C88 100 6V CEA 101P 6
C89 100 6V CEA 101P 6
C98 2.2 25V CSZA 2R2M 25
C99 2.2 25V CSZA 2R2M 25
C102 2.2 25V CSZA 2R2M 25
C105 2.2 25V CSZA 2R2M 25
C106 220 35V CEA 221P 35
C111 10 16V CEA 100P 16
VC1 ACK-015
TC6 ACM-006

AWK-065 Amplifier Assembly
C3 100 10V CEA 101P 10
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom