Ideas for an SSD chip jig / rig please?

Dr_C said:

Hi Keith, yes, a few inaccuracies in that well used old circuit diagram... but its still useful... even for fault tracing on the rev H decoder which is quite similar. I have no idea where the idea of a 10uF capacitor across the motor came from!

c

Click to expand...

1) I had not taken much notice of that 'end' of the circuit yet .. certainly an interloper!

2) With respect to the Fets - it's almost impossible to tell. A slight rework to T1 perhaps, but too close to call. All my chips have come either new, or from Greg K, which would account for the precision.

So, on with the show:

I need to sort out all the breakout pins / sockets or whatever for my gadget, and there have to check the inputs and outputs. The other reason of course is so that when the jig is complete - I know what to look for!

I am starting at the left side today with the voltage regulator, and trying to reconcile what is on the aforementioned circuit diagram, with what's on the chip in actuality. NB 'exact' datasheet not found.

Perhaps you, or someone would cast an over these two diagrams please and check these out? I don't know what the silk screen markings 'Rev' and 'Car' refer to. These pins appear soldered but I can't tell if they are actually connected to anything?

Thank you.

The 5V regulator is a Texas Instruments LM78L05A.

https://www.ti.com/lit/ds/snvs754l/snvs754l.pdf?ts=1602528434807&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FLM78L

1/ note for the SOIC 8 pin package pins are numbered from 1, rotating counter-clockwise. So the pin numbers on your above diagram look a bit odd.

Diagram from the TI datasheet;

2/ not sure about the silk screen labels - where did your diagram come from?

c

Thanks ever so much.

aha, the 555 style layout is easier on the eye!

My pinout numbering is from a presumed similar, 7805 component, found on google as I am unused to the SMD package, pinout arrangements.

I am making my own reference in/output diagrams to work from for: (1) the regulator - as above (2) the six transistors (3) the pic

... i.e. adding screen labels, mostly copied from the actual chip, to suit.

One diagram down, two to go...

Keith.

Much appreciated Dr_C

Here are my diagrams for the C7005 Voltage Rgulator pinout (updated) and the same for the Microcontroller used in the same.

The purpose of these is to make it easier to follow traces on the PCB and test for continuity.

Comments and advice would be most welcome as usual.

I will be working on a transistors pinout diagram next.

Here is my simplified diagram for use in testing the continuity from and between transistor connections on the SSD C7005 chip.

OK, I decided to go ahead with a similar pinout diagram for the diodes (bridge rectifier) on the C7005

Boring DISCLAIMER: I offer these diagrams as a hobbyist's 'personal interpretation' of the C7005 connections that I am using for my 'chip jig' project.

If you use these connections or ideas you do so at your own risk and responsibilty.

My next step is to put some voltages on these diagrams.

Please let me know if you find any errors. Thanks.

Hi there,

To keep things simple...

2 diodes should input from track green and 2 should input from track yellow.

In a different combination...

2 diodes should output to 0V and 2 should output to U2 in.

Really like what you are doing :thumbsup:

c