Thanks for the analysis, I have updated my schematic.
Regards
Rob
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of shad
> via cctalk
> Sent: 25 December 2017 20:37
> To: cctalk
> Subject: RE: Help Identifying Components
>
Further analysis:
A106 =STTA106/U
2X =MMBT4401
2T =MMBT4403
Good luck!
Andrea
Hello,
while I can confirm that the bigger black with two pins is a diode, I'm not
sure what kind of diode it is, as it could be bipolar, Schottky or Zener.
About the smaller black components with three pins, they could be
transistor or diodes (single or double, with common cathode, common anode
o
> -Original Message-
> From: David Collins [mailto:davidkcolli...@gmail.com]
> Sent: 24 December 2017 22:07
> To: r...@jarratt.me.uk; Rob Jarratt ; General
> Discussion: On-Topic and Off-Topic Posts
> Subject: Re: Help Identifying Components
>
> If you could wa
If you could wait, getting one of those ‘unknown component testers’ would help
you!
David Collins
> On 25 Dec 2017, at 5:27 am, Rob Jarratt via cctalk
> wrote:
>
> I am continuing work to reverse engineer the schematic for my H7826 PSU. I
> have removed one of the daughter cards in order to d
> >
> > My guess is capacitors also.
>
>
> Noting they are paralleling resistors, they're probably just noise/AC
bypass, on
> the order of 0.01 uF, and not overly consequential to understanding the
basic
> circuit.
>
> Again, one can draw it out with the above presumption and then assess
> wheth
On 2017-Dec-24, at 12:01 PM, Chuck Guzis via cctalk wrote:
> On 12/24/2017 11:15 AM, Rob Jarratt wrote:
>
>> I think the orange components are capacitors (they are taller than the
>> browner ones), but their markings don't seem to hint at the values, some are
>> marked "AA4", which does not seem
On 2017-Dec-24, at 10:27 AM, Rob Jarratt via cctalk wrote:
> I am continuing work to reverse engineer the schematic for my H7826 PSU. I
> have removed one of the daughter cards in order to draw its schematic, but I
> can't identify some of the surface mount components on it. I have posted a
> pictu
On 12/24/2017 11:15 AM, Rob Jarratt wrote:
> I think the orange components are capacitors (they are taller than the
> browner ones), but their markings don't seem to hint at the values, some are
> marked "AA4", which does not seem to correspond to any marking scheme I have
> been able to find.
> My guesses are as follows.
>
> 1. That "AA" or "M" looks to me like a Motorola logo. The fact that this
> device
> is polarized leads me to suspect that it's a diode.
>
> 2. I suspect that this thing is a fuse.
>
> 3. Almost certainly transistors. The center pin is usually the collector.
On 12/24/2017 10:27 AM, Rob Jarratt via cctalk wrote:
>
> 1. The component with two wide pins that looks like an IC
> approximately in the middle of the board. It is marked M106 (or it might be
> AA106) and 91813 underneath. I think it may be a resistor, but I am not
> sure.
>
> 2. J
I am continuing work to reverse engineer the schematic for my H7826 PSU. I
have removed one of the daughter cards in order to draw its schematic, but I
can't identify some of the surface mount components on it. I have posted a
picture of it here:
https://rjarratt.files.wordpress.com/2017/12/50-1953
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