Searching pinout 2SC1663/2SA835

[tubee]

I am searching for the pin order of these transistors. Searched some while on www no result.

Anyone?

 

[richie00boy]

It took me less than 1 second and Google. How were you searching???

http://www.datasheetarchive.com/2SC1663-datasheet.html

 

[tubee]

Yes had those site too. Its informs about all characteristics, but no pinout visible , for me at least.

 

[StevenOH]

Face up, that would be : E-B-C
If they are from/in the equipment, the marking can be on the board. In any event, do the junctions diode check - all these databooks can be misleading.

 

[tubee]

Thanx !!

Then is the layout printed allright in the service manual, but not correct on the pcb. I will take my precautions and checke everything.

 

[richie00boy]

Yes had those site too. Its informs about all characteristics, but no pinout visible , for me at least.

I saw on that site that it was package TO-202var, so then put that into Google and found another device with that pinout and a datasheet for it.

 

[Steve Dunlap]

http://pdf1.alldatasheet.com/datasheet-pdf/view/268617/ISC/2SC1667.html

 

[StevenOH]

<<Then is the layout printed allright in the service manual, but not correct on the pcb.>>

Too bad. I wouldn't be surprised, if you will end up with this pinout: B-C-E.
Collector voltage drop will be less then that of the Emitter junction. And you can follow the traces on the board.
For replacement look for the same grades: Sony grades their parts by digits.

 

[tubee]

I have discovered the confusing/mix up. The Sony amplifier i am working on is perfectly symmetric built, and so these transistors are mounted, one channel with back and other with frontside to heatsink mounted.

 

[Lumba Ogir]

tubee,
if sill in doubt, the pinout is E-B-C, C to cooling fin. I`m not aware of any deviations for this package.

 

[tubee]

Yes because of the fin on collector i discovered the wrong placement of my replacement transistors: 2SA1011/2SC2344

Thanks all for reply. I will revive a 7ties Sony amp in a short momentand hope my work is done tidy.

 

[Lumba Ogir]

tubee,
what output devices are used in that amp?

 

[tubee]

Sony Vfets 2SJ18/2SK60 cascaded with transistors. Replaced the bipolar transistors with D44H8/D45H8, so it should drive an 4 ohm load. It is the TA-N7B amp.

 

[tiefbassuebertr]

I am searching for the pin order of these transistors. Searched some while on www no result.

Anyone?

SONY 2SA835 can replace through Motorola MPS-U60
SONY 2SC1663 can replace through Motorola MPS-U10

pinout and outline is the same by all types - go to

http://pdf1.alldatasheet.com/datasheet-pdf/view/124196/MOTOROLA/MPS-U10.html
http://pdf1.alldatasheet.com/datasheet-pdf/view/100844/MOTOROLA/MPS-U60.html

This information I read in the same order by follow comparsion table books in German Language
1) ECA "tvt transistoren2 '79/80
2) JAEGER ELEKTRONIK Vergleichstabelle 2001

 

[Lumba Ogir]

tubee,

Sony Vfets 2SJ18/2SK60 cascaded with transistors.

Nice devices in a nice configuration. Are you sure that all of them are defective?
Anyway, it`s going to be a degrade not an upgrade.

 

[tubee]

I am busy with this beast for a year now. 1 fet was burned and 2 drivertransistors and 1 cascaded transistor.

I replaced the cascade transistors to heavier ones, they are the cause of Vfet failure, and want to prevent expensive obsolete Vfet frying again.

All caps are replaced except the big Lytics, all fusible resistors and some diodes/zeners.

So if someone has (a supplier for) Nippon Chemicon 27000uF/80V lytics.

 

[Lumba Ogir]

Suggestion #1

 

[tubee]

An externally hosted image should be here but it was not working when we last tested it.

I rather like to keep the Vfets.

 

[tubee]

Well i have done all work right, the Sony is revived again after so many years.

An externally hosted image should be here but it was not working when we last tested it.

 

[Lumba Ogir]

tubee,
congratulations.

I rather like to keep the Vfets.

Of course.

So if someone has (a supplier for) Nippon Chemicon 27000uF/80V lytics

A different brand should do as well, the higher capacitance the better.