Checks \ Steps To Do After Recapping ?

[dnpainting]

[/B]


Is there only 1 fuse in the SA 8500 ii ?
I checked in mine , fuse 1.6A between pin 36 - 37 - is NOT blown.
Voltage : 0.0
Amperage : 0.0
Continuity - exists.

I see 2 (3A) fuses in the schematic, 1 between pins 36~37 and 1 between Pins 38~39, side by side. Also, they should be checked out of circuit.

 

[omri617]

Checked again , nothing . There is an empty slot between 38-39
My amp is HG version (220/240V) maybe they differ ..
?

 

[omri617]

I see 2 (3A) fuses in the schematic, 1 between pins 36~37 and 1 between Pins 38~39, side by side. Also, they should be checked out of circuit.

Mine is supposed to be HG (220-240V) , according to the schematic , there
should be 2 Fuses . FU1 + FU2 . Both AEK-405.
Next reply I will post a photo of my amplifier , Very Strange

 

[omri617]

Photo of my amplifier

The fuses section
Very strange thing
Looks like it never been there , solder looks authentic!
Here is the time when I need help!

 

[dnpainting]

The HG has a different SM Section than what I have, sorry. I would wait for Mark The Fixer to get back to you on what to check.

 

[omri617]

I appreciate very much your help and replies.
Thanks friend..

 

[dnpainting]

Looks like a lot of cold solder joints, could just be shadows.

 

[omri617]

I think it's shadows , most of them weren't touched

 

[dnpainting]

I think it's shadows , most of them weren't touched

Not caused by you. Through the years of play, joints get weak from the heating and cooling of the component. Eventually separating from the joint. This is why a reflow of joints is a good idea. On transistors, diodes you want to use a heat sink clipped onto the leads before you solder to prevent them from excessive heat.

http://www.audiokarma.org/forums/showthread.php?t=106770

 

[omri617]

Got to admit , when I soldered most of the diodes and transistors , didn't use a heat sink. Soldering took 3 seconds maximum . The time it took desoldering the old components , was more...

 

[dnpainting]

Got to admit , when I soldered most of the diodes and transistors , didn't use a heat sink. Soldering took 3 seconds maximum . The time it took desoldering the old components , was more...

So, did you change out transistors and diodes? If you did, you might want to post substitutions that you used along with board, original transistor and position, Q1, Q2 etc.

 

[markthefixer]

I am sure about the capacitors , but not so sure about the 3 legged diodes
Control amp

3 legged diodes?

HOW did you decide where to put each of the 3 transistor leads in which of the three holes?

They are transistors. There are 6 ways to install them, and 5 of the 6 ways are wrong. AND the replacements are NOT ALWAYS the same lead layout as the original, installing transistors wrong ways in can/WILL destroy transistors.

You are supposed to ask questions about EVERYTHING you do not understand, the thing that gathers disrespect here is plunging blindly on ahead. Answering questions is far easier than repairing damage.

I will ADD to this post (i have to find it) before Monday dawn MY TIME, a link to instructions I posted on recognizing the transistor symbol, the lead orientation of the transistor you want to use, and how to get the two of them together correctly. UNTIL each and every transistor is TESTED or REPLACED correctly, power WILL NOT BE APPLIED. PERIOD.

The ALL CAPS is for emphasis, NOT anger. understand? it is important.

 

[omri617]

I completely understand , and will be waiting for instructions.
I installed them in such way that the emitter is in the hole where this symbol is

 

[omri617]

The Parts re-placed (According to Mark's List)

EQ. Amp

AWG044 C15 4.7uF 50v CEANL 647-UKL1H4R7KDDANA
AWG044 C16 4.7uF 50v CEANL 647-UKL1H4R7KDDANA
AWG044 C17 2.2uF 50v ach-309 647-UPW1H2R2MDD
AWG044 C18 2.2uF 50v ach-309 647-UPW1H2R2MDD
AWG044 C37 4.7uF 50v CEANL 647-UKL1H4R7KDDANA
AWG044 C38 4.7uF 50v CEANL 647-UKL1H4R7KDDANA
AWG044 C39 4.7uF 50v CEANL 647-UKL1H4R7KDDANA
AWG044 C40 4.7uF 50v CEANL 647-UKL1H4R7KDDANA
AWG044 C43 100uF 16v CEANL 647-UKL1E101KPDANA
AWG044 C44 100uF 16v CEANL 647-UKL1E101KPDANA
AWG044 C45 2.2uF 50v ach-309 647-UPW1H2R2MDD
AWG044 C46 2.2uF 50v ach-309 647-UPW1H2R2MDD
AWG044 C47 100uF 25v CEA 647-UPW1E101MED
AWG044 C48 100uF 25v CEA 647-UPW1E101MED
AWG044 C49 100uF 25v CEA 647-UPW1E101MED
AWG044 C50 100uF 25v CEA 647-UPW1E101MED
AWG044 q1 2sa725 512-KSA992FBU
AWG044 q2 2sa725 512-KSA992FBU
AWG044 q3 2sa725 512-KSA992FBU
AWG044 q4 2sa725 512-KSA992FBU
AWG044 q5 2sc1919 512-KSC1845FTA
AWG044 q6 2sc1919 512-KSC1845FTA
AWG044 q7 2sc1919 512-KSC1845FTA
AWG044 q8 2sc1919 512-KSC1845FTA

 

[omri617]

Control Amp

AWF023 C1 1uF 50v CEANL 667-ECQ-V1H105JL5
AWF023 C2 1uF 50v CEANL 667-ECQ-V1H105JL5
AWF023 C9 470uF 6.8v CEA 647-UPW1A471MPD
AWF023 C10 470uF 6.8v CEA 647-UPW1A471MPD
AWF023 C17 3.3uF 50v CEA 647-UPW1H3R3MDD
AWF023 C18 3.3uF 50v CEA 647-UPW1H3R3MDD
AWF023 C21 4.7uF 25v Bipolar 647-UEP1V4R7MDD
AWF023 C22 4.7uF 25v Bipolar 647-UEP1V4R7MDD
AWF023 C31 47uF 35v CEA 647-UPW1V470MED
AWF023 C32 47uF 35v CEA 647-UPW1V470MED
AWF023 C35 47uF 35v CEA 647-UPW1V470MED
AWF023 q1 2sa725 512-KSA992FBU
AWF023 q2 2sa725 512-KSA992FBU
AWF023 q3 2sa725 512-KSA992FBU
AWF023 q4 2sa725 512-KSA992FBU
AWF023 q5 2sc1919 512-KSC1845FTA
AWF023 q6 2sc1919 512-KSC1845FTA
AWF023 q7 2sc1919 512-KSC1845FTA
AWF023 q8 2sc1919 512-KSC1845FTA
AWF023 q9 2sa726 512-KSA992FBU
AWF023 q10 2sa726 512-KSA992FBU

 

[omri617]

Switch Assembly (AWS-108) psu & prot

AWS108 C7 .68uF 35v CSZA 667-ECQ-V1H684JL
AWS108 C8 .68uF 35v CSZA 667-ECQ-V1H684JL
AWS108 C9 .22uF 10v CSSA 667-ECQ-V1H224JL2
AWS108 C10 .22uF 10v CSSA 667-ECQ-V1H224JL2
AWS108 C11 470uf 6v CEA 647-UPW1A471MPD
AWS108 C12 100uF 16v CEA 647-UPW1V101MPD
AWS108 C13 2.2uF 50v cea 647-UPW1H2R2MDD
AWS108 C20 100uF 35v CEA 647-UPW1V101MPD
AWS108 C21 100uF 35v CEA 647-UPW1V101MPD
AWS108 C22 220uF 50v CEA 647-UPW1H221MPD6
AWS108 C23 220uF 50v CEA 647-UPW1H221MPD6
AWS108 q1 2sc869 512-KSC1845FTA
AWS108 q2 2sc869 512-KSC1845FTA
AWS108 q3 2sc945 do-not-replace
AWS108 q4 2sc945 do-not-replace
AWS108 q5 2sa733 do-not-replace
AWS108 q6 2sc945 512-KSC2383YTA
AWS108 q7 2sc1384 512-KSC2690AYS
AWS108 q8 2sd381 512-KSC2073TU
AWS108 q9 2sb526 512-KSA940TU
AWS108 d1 30d2 512-1N5404
AWS108 d2 30d2 512-1N5404
AWS108 d3 30d2 512-1N5404
AWS108 d4 30d2 512-1N5404
AWS108 d5 30d2 512-1N5404
AWS108 d6 30d2 512-1N5404
AWS108 d7 30d2 512-1N5404
AWS108 d8 30d2 512-1N5404
AWS108 d9 1s1886 512-1n4004
AWS108 d10 1s1886 512-1n4004
AWS108 d11 1s1886 512-1n4004
AWS108 d12 1s1886 512-1n4004
AWS108 d13 wz-250 512-1N5253B
AWS108 d14 wz-250 512-1N5253B
AWS108 d15 1s2472 512-1n4148
AWS108 d16 1s2472 512-1n4148
AWS108 d17 1s2472 512-1n4148
AWS108 d18 1s2473 512-1n4148
AWS108 d19 1s2473 512-1n4148
AWS108 d20 1s2471 512-1n4148
AWS108 d21 1s2473 512-1n4148
AWS108 s12 asr-023 653-MY4-02DC24

 

[dnpainting]

Good read:
http://www.audiokarma.org/forums/showthread.php?t=43186

You can't trust this either. The unit I am working on had the pinout in the schematic Legend incorrect on one transistor I pulled.

 

[markthefixer]

I completely understand , and will be waiting for instructions.
I installed them in such way that the emitter is in the hole where this symbol is

Assuming ecb on the transistors on the picture, they look good

I am relieved...

we'll go over them all, BUT almost ALL of my Fairchild recommendations with the TO-92 cases and the TO-126 cases are ECB, leads pointing down, lettering facing you, going left to right.

The to-220 's are bce (opposite)

reserved space for another link.

read this

 

[dnpainting]

Q2 & Q4 Look to be installed wrong. Looks like you have the emitter on the base.

Foil Side Images are the bottom of the board so things are reversed



Edit** It apears that they all have the emitter on the base on this board

Added Foil Side Image*

 

[dnpainting]

Looks to be the same on the023 (Eq) Board. You have the Emitter on the base (Flipped Around)