Fluke PM6304 PM6306 PM9565 - DC measurement option board, project halted.

[coromonadalix]

Hello @ll   

I'm trying to revive this board and checking here if anyone would be interested to have a bare board or an assembled one   feedback's  etc ...

I have designed and routed a new schematic revision ... i'm in process of ordering 5 prototype boards and checking for errors if any.

In Canada   I can have all the parts at Digikey for around 120$ Can  for assembling  2 or 3 boards, and 30$ Can for 5 bare boards.  Few years ago this board was sold for 900 Euro

I'm waiting for an answer from a EEVblog member, if he would be kind enough to ship me his board to help me counter check my version, maybe send his rs232 adapter option too, to copy / dump the firmware and make it available.

I'm not trying to take huge profit, but enough to cover material and parts, and add the missing options for my LCR Meter.

I work in a pcb assembly company, i have access to smt assembly machine and solder posts ...

[BravoV]

Count me in, check your PM.

[BravoV]

So board wise, I assume it will look similar to this ?

Photo courtesy of HighVoltage from this -> post



Edit : Calling out HighVoltage for helping us more close up photo of his board. 

[HighVoltage]

I will be sending a RS232 board and a DC board to coromonadalix by airmail next week, for reverse engineering, to get this project going.

May be I can take some pictures before I send them out.

[BravoV]

I will be sending a RS232 board and a DC board to coromonadalix by airmail next week, for reverse engineering, to get this project going.

May be I can take some pictures before I send them out.

Yay !!! 

A macro close-up of that board at both sides will be really helpful to clone this board, thank you. 

[coromonadalix]

@ bravo  similar look  but not identical, since i will use dual op27 amp (opa2227) instead of single ones,  reduced parts count, the change made a 25$ less in  parts, the size is now good, it should fit ?

Here's a look of the pcb  2-3 posts down this one

I have used radial decoupling capacitors for the moment, to help the second layer, the layer thickness or width size may be too small in the power lines. And I'm limited to 2 layers unless i pay more ... it double the price for a 4 layers 1 oz pcb's

IF high voltage send me his boards,  i will compare them before producing ... i have only 3 missing supply traces from the SM for a chip, i could put them and cut them if needed ??

I would like to build a potential list of buyers ?? for around 150$ CAD each,  the chips are the one who cost a lot,

The 1% smt resistors are around 0.35$/each for 36 parts count, and the resistor network chip is around 8$  

I used smt 1210 size to have possibility of the originals mma0204 series resistors ?? i'm not able to have all the values here in 1%.


The strange thing with the res network  is some kind of thermal coupling between the 8 resistors, they are in serial (4x1k) with an common point, i can't see another functionality than this, instead of 2 single axial resistors of 4k thermally glued together

LIST:

#1 is @bravo

[BravoV]

Great 

Btw, you can upload that file or any other supported types as an attachment as this forum, just look below the dialog box you're typing, it will be much better than external hosting, especially the free ones, just a suggestion.

[BravoV]

Just noticed the board's shape, as there is a extruded part, are you planning to do plain rectangle ?

Not a big deal though, at least for me, just curious.

[coromonadalix]

Parts ordered,  have to make an final check on the pcb ... should arrive before the end of the month

[BravoV]

Have you received the board from HighVoltage ?

[HighVoltage]

Have you received the board from HighVoltage ?

That would be faster than light!
I just came back from a business trip and will send them out on coming Tuesday (Monday is a holiday) by airmail.
Then it should take one week, I guess.

[BravoV]

Have you received the board from HighVoltage ?

That would be faster than light!
I just came back from a business trip and will send them out on coming Tuesday (Monday is a holiday) by airmail.
Then it should take one week, I guess.

LOL , ok, hopefully they will arrive as planned.

Btw, please take a close-up/macro shots of the whole board at both sides if its not troubling you too much, TIA.

[coromonadalix]

Here's the final version ?? still checking if all is right before ordering, added some pads in RN111 for thru hole resistors ...

In the service manual, there was some thru hole added parts  in figure 31,  the green board picture we see has the revisions integrated on the board.

For the four thru hole parts, 1 inductance and 3 resistors i have to wait for highvoltage to ship me his board and correct them later It should be ok like this too and still be functional.
 

[HighVoltage]

OK, I am in the lab now and removed the DC and RS232 boards and can send them both out today.
Next I will take some high res pictures for you of both boards.

[HighVoltage]

DC Board
Front Pictures

[HighVoltage]

DC-Board
Back Pictures

[HighVoltage]

RS232 Board Front

[HighVoltage]

RS232 Board Back

[coromonadalix]

Waiting for Highvoltage boards to continue this thread ....

[HighVoltage]

They are shipped out and hopefully arrive at your place in a few days.

[coromonadalix]

Boards just received,  dump the rs232 interface FW and  checking my pm9565 design against the real pm9565 from Highvoltage


Edit : rs232 interface
The dump is made in 3 copies, check ok ??  its a ST m27c1001-12c1,  d109  (part number not listed )
The cpu is an OTP 80c652 (rom less)

Edit 2 : there is some wire rework on 2 chips near the cpu

Edit : DC Option pcb
Highvoltage board is an revised version of the photo "schematic figure 31" page 147

[BravoV]

Any updates ? 

[coromonadalix]

It is a nightmare to find the original mma0204 resistors, Newark ask a minimum of 3000 parts to buy  for 3 values total of 9000 resistors total of 380$  outch

In smt1210 sizes, i miss only a value of 4.64 megs, 6-8 weeks of delay

I never tought it would be this difficult to have precision parts ...  the boards are ready to be ordered


Since the pm6304 and 6306 inside photos are shown,  i'm sure the board will fit, they are identically positioned, and the clearance will be ok,  not totally sure of the 6303 model ..  my boards are almost 1 cm too high, the width is ok.

Tried to shrink further the board, but the software has begun to take too much time to place and manage the parts (clearance, track width, parts spacing etc..), i helped it by taking thru holes decoupling 0.1uf capacitors instead of the smt ones.

I can only make 2 sided boards, if i do a 4 layer one, the costs are jumping up really fast.

[klaus11]

A quick look at EBay Europe's, there seems to be a lot of MMA0204.   

[Neomys Sapiens]

It's been a time, but the way this thread ends in mid-air, left me wondering: were those boards actually made and did they work? Are there available parts or PCB files?