Please help me identify this part marked "F10W" - diyAudio
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Old 7th January 2016, 04:28 AM   #1
TBL is offline TBL  Hong Kong
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Default Please help me identify this part marked "F10W"

Working on a Technics RSB78R cassette deck, I d like to replace this part I found not working coz its output trace shows no output of its supposedly 12vdc.

This is on the PCB marked F601, inserted between input from psu source CNM terminal number 6, and output terminal +. This output connects the 12vdc servo motor for the capstan. looks like to me a transistor for 12vdc. The PCB I attach here shows it marked on board, as I said, F601.

So what does this part work? What is this part? What kind of replacement should I look for at the parts store?

Thank you guys for helping!

Terence
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Old 7th January 2016, 04:51 AM   #2
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Hi Terence
A service manual will help pinpoint what this part does.
a manual ( at cost ) is available here: TECHNICS RSB78R - Service Manual Immediate Download

A few images would help us to help you. I have a Towers
transistor substitute book that I could look up, once the
part is properly identified. The part may also be a voltage regulator
which if it is, is easy to spot. image would greatly assist.

Cheers / Chris
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Old 7th January 2016, 05:12 AM   #3
TBL is offline TBL  Hong Kong
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Hey All!

Sorry I messed up uploading.

SO here it comes again......

Terence
Attached Images
File Type: jpg IMG-20160107-WA0000 (1).jpg (184.7 KB, 148 views)
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Old 7th January 2016, 03:53 PM   #4
Enzo is offline Enzo  United States
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Generally on a circuit board, F-number parts are fuses or similar. I'd wager from that and your description of the circuit that it is a fuse element, an electronic fuse perhaps. Like a current sensor that opens the circuit when trouble occurs.
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Old 7th January 2016, 05:34 PM   #5
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Yes agree with Enzo.
Farnell stock resettable thermal fuses: http://www.farnell.com/datasheets/2002393.pdf

Cheers / Chris
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Old 8th January 2016, 06:14 AM   #6
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Never seen a three leaded fuse. Is there a connection to the centre pin, your photo is not clear. It might be a filter.
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Old 8th January 2016, 11:48 AM   #7
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Quote:
Originally Posted by Enzo View Post
I'd wager
A semiconductor fuse is 3-legged, some even look like a dipped capacitor, but it goes open circuit for protection.
Also has leads of identical length, this one does not, the one in the middle appears in limbo.

The package has the top blown off, solderable pcb fuse resistor.
See for examples Busse pcb fuse, Schurter, Wickmann, or even stuff like Littlefuse.
It's Japanese, Man !

(if it's Japanese and the part is other than a Fuse, the printing on the pcb would be other than F)
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Old 8th January 2016, 07:07 PM   #8
Enzo is offline Enzo  United States
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Blown off top? MAybe. It looked to me like a half round notch up there to identify orientation. maybe a better photo...
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Old 8th January 2016, 08:46 PM   #9
Elvee is offline Elvee  Belgium
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No blown off top, that's just the type of case used by Japanese in the 80's for all kinds of components: diodes, digital transistors, fuses, etc.
Automatic insertion machines could only deal with a limited number of component types, and that was part of the answer.
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Old 8th January 2016, 09:48 PM   #10
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Quote:
Originally Posted by Elvee View Post
the type of case used by Japanese in the 80's
My bad, should have asked first if the package was damaged.

(if it is a notch, this SIP-3 package type is called an FTR. 7mm length, 3.4-4.7mm height, 2.6mm thickness of the case)
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Last edited by jacco vermeulen; 8th January 2016 at 10:04 PM.
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