ESR meter upgrades

[vinceroger69]

Re: ESR meter upgrades

no, i'v seen a few of these panels lifted - they are more like this:
http://www.ebay.com/itm/182035169094

the question is how that ribbon maps to the pinstrip on the backing pcb.

your spot on with your link ive just moved my ribbon cable carefully and it looks identical pin wise on the ribbon cable tracks

[stj]

Re: ESR meter upgrades

try this one.

[Per Hansson]

Re: ESR meter upgrades

Tried "testing-swap12.zip" but just like the others there was only backlight.

[stj]

Re: ESR meter upgrades

shit.
have to think about this until vince pins out that display to the pinstrip on the backing board.
and the socketstrip on the mainboard to the cpu for that matter - his underside photo was not good enough to get that part.

what i have is this:
1 - gnd
2 - atmel pin 2?
3 - atmel pin ?
4 - atmel pin ?
5 - atmel pin 5?
6 - +5v
7 - gnd
8 - +v (led)
9 - gnd (led)

pin1 on the socketstrip is at the outer edge - can you trace/meter the atmel pins to the display connector?
i suspect the atmel is using pins 2,3,4 & 5

[Per Hansson]

Re: ESR meter upgrades

I already did, back in this post I tracked the Atmel CPU to the pinstrip.
And it was exactly as the schematic I linked on the previous page.

[vinceroger69]

Re: ESR meter upgrades

I will meter the pinout now bear with me

[vinceroger69]

Re: ESR meter upgrades

right the ribbon cable has 14 pads reading left to right
pin 1 nc
pin 2
pin 3 nc
pin 4 nc
pin 5
pin 6
pin 7 on ribbon cable to pin 7 on connector
pin 8
pin 9 on ribbon cable to pin 5 on connector
pin 10 on ribbon cable to pin 4 on connector
pin 11 nc
pin 12 on ribbon cable to pin 3 on connector
pin 13 on ribbon cable to pin 2 on connector
pin 14 on ribbon cable to pin 1 on connector

pin 8 and 9 on connector go to backlight
as per my above picture im classing pin one on the left hand side of picture.
anything else you need whilst my lcds apart just ask.

[stj]

Re: ESR meter upgrades

I already did, back in this post I tracked the Atmel CPU to the pinstrip.
And it was exactly as the schematic I linked on the previous page.

that incomplete schem does not even have the correct cpu pin labels!
i started drawing a new one.

[stj]

Re: ESR meter upgrades

o.k., i need the track marked in green clarified.
where is it going on the pinstrip?
there is too much flux to see it clearly.

and i need the cpu pins traced - dont point me at a bogus schematic from china.

[vinceroger69]

Re: ESR meter upgrades

o.k., i need the track marked in green clarified.
where is it going on the pinstrip?
there is too much flux to see it clearly.

and i need the cpu pins traced - dont point me at a bogus schematic from china.

just cleaned board your highlighted track goes to pin 2 on connector pin 13 on ribbon cable

[stj]

Re: ESR meter upgrades

o.k., i now have a schem of the display board
and i have this pic!!!!!



so i need pins 2-5 traced to the cpu to verify which pins they go to.

[stj]

Re: ESR meter upgrades

so our display board connector looks like this

1 - lcd /CE (gnd)
2 - lcd RST
3 - lcd A0
4 - lcd SCL
5 - lcd SDA
6 - +5v
7 - gnd
8 - led anode
9 - led cathode

[vinceroger69]

Re: ESR meter upgrades

stj ive used diode/bleep tests these are my results pin 1 on pcb/lcd connector im classing left had side of board
pin 9 goes to pins 22 and 8 gnds
pin 8 goes nc?
pin 7 goes to pins 22 and 8 gnds
pin 6 goes to pin 7 vcc and pin 20 avcc
pin 5 goes to pin 5 pd3
pin 4 goes to pin 4 pd2
pin 3 goes to pin 3 pd1
pin 2 goes to pin 2 pdo
pin 1 goes to pins 8 and 22 gnd

stj i hope that makes sence im learing as i going/testing etc

[stj]

Re: ESR meter upgrades

that's great.
i'll go throw something together to test.

[vinceroger69]

Re: ESR meter upgrades

that's great.
i'll go throw something together to test.

Thanks stj for taking time to try and sort this ive got to admit i have no idea about the code/hex stuff you have too do to write a working program etc.

[stj]

Re: ESR meter upgrades

try these

[vinceroger69]

Re: ESR meter upgrades

try these

Thanks stj i will try it as soon as im back home as just need to pop out, maybe per hansson can check this too as im still learning how to use my programmer so i would not want too say your file dosnt work when it does as im messing up my end programming it although i will try when im back home.

[stj]

Re: ESR meter upgrades

maybe now you know why it's good to have a programming header on the board!

[vinceroger69]

Re: ESR meter upgrades

maybe now you know why it's good to have a programming header on the board!

soldering one on the pcb etc isnt the isuue its the learning of the programming side of things im reading up on and trying too learn, things it seems to take longer as you get older.

[Per Hansson]

Re: ESR meter upgrades

that incomplete schem does not even have the correct cpu pin labels!
i started drawing a new one.

You are correct they mislabeled some of the pins, but the layout seems correct.
As now verified by vinceroger69 as well

I now tried all firmwares in "testing-chips.zip"
The only one which gave scrolling text like with the previous files quoted below was the 7565 display firmware.
All others just had blank display with backlight lit.

testing-ramshift.zip
testing-oc.zip
The above two behaved like it also did with "GM328A ESR tester (SVN663).zip" which was scrolling characters on the screen.