Electronics > Repair
Hameg HM8118 repair
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TRN:

--- Quote from: coromonadalix on November 27, 2023, 01:16:58 am ---just send them an email  if they have a substitution ??  at least a 30 pins flex  with all the signals  ...and the controllers 

yep thats what i tought   2x chipselect,1x Enable pin ...



dual S1D10605  lcd's ?

http://www.3t-lcd.com/MechanicalSpec/Graphical/TMGG24064-XX.pdf                   22 pins lcd ?

COG-BT240064-05
https://www.farnell.com/datasheets/31889.pdf   22 pins lcd ?

TMGG24064-XX
http://www.3t-lcd.com/MechanicalSpec/Graphical/TMGG24064-XX.pdf    22 pins lcd ?

the TMGG24064   is the one we get the most while searching ?,   it would need some pcb adapters to reduce the pin count ??

https://i-lcd.com/LCD/Graphic/240x64.php

--- End quote ---

22pins means a serial interface
Unfortunately this LCD has parallel interface
coromonadalix:
I think you should check you received  pdf from the designer  before answering ....

Check the pinouts and you'll learn that your has SPI  lines, see SCL SI  etc ....  unless specifically written parallel operation and or 8088 interfacing etc ....  witch the pdf doesn't tell


Well thats all for me, it seem you have some stubbornness,   i'll keep  my comments for now and read only

Now that you seem to have some connection from the designer,  if he still wants to answer, ask him for substitutes,  and do some search now that you got some answers on the 2x controller blob

I think you may, in the end do some magic in the hardware and maybe firmware too ???   R&S  should be made aware of this problem, unless they already know it, and not selling parts is not good even if you end up with a non calibrated unit, this is abusive behaviour.

Theses lcd's are old or unobtanium and the other suggested are more recent, but still old in some models ...

So sad to have an expensive lcr pludered by a now cheap lcd problem,   take some courage and made it repaired ?


TRN:

--- Quote from: coromonadalix on November 27, 2023, 11:13:40 am ---I think you should check you received  pdf from the designer  before answering ....

Check the pinouts and you'll learn that your has SPI  lines, see SCL SI  etc ....  unless specifically written parallel operation and or 8088 interfacing etc ....  witch the pdf doesn't tell


Well thats all for me, it seem you have some stubbornness,   i'll keep  my comments for now and read only

Now that you seem to have some connection from the designer,  if he still wants to answer, ask him for substitutes,  and do some search now that you got some answers on the 2x controller blob

I think you may, in the end do some magic in the hardware and maybe firmware too ???   R&S  should be made aware of this problem, unless they already know it, and not selling parts is not good even if you end up with a non calibrated unit, this is abusive behaviour.

Theses lcd's are old or unobtanium and the other suggested are more recent, but still old in some models ...

So sad to have an expensive lcr pludered by a now cheap lcd problem,   take some courage and made it repaired ?

--- End quote ---

Hello coromonadalix,
All your comments are well received and appreciated, so keep them coming :-+, and I don't think I am stubborn ;D

I might be mistaken but the reason I mentioned that the protocol is parallel, because tracing the PCB, all 8 data lines are connected to the MCU via 51ohm resistors, and I figured that if SPI was used they would not have connected D0-D5, but only D6 & D7

coromonadalix:
ok i admit  i'm in the wrong  sorry   

check  pin2   p/s  the answer is there

maybe find some projects  with similar displays ....  and you have  other 240x64  dual drivers like yours    but in the standard physical metal frame

some specs  found today

https://www.crystalfontz.com/controllers/Epson/S1D10605/80/   attached here

from

https://www.crystalfontz.com/controllers/Epson


possible substitutions   ??  but 8088 mode and not the same controller  .... would be nice to have help from the designer
https://www.winstar.com.tw/products/graphic-lcd-display-module/240x64-lcd-display.html

https://www.raystar-optronics.com/graphic-lcd-display-module/240x64-lcd-display.html
https://www.raystar-optronics.com/upload_files/monochrome-lcd-module/240x64-graphic-lcd-dispaly/RG24064A2-datasheet.pdf

https://www.orientdisplay.com/products/amg24064p-g-w6wfdw-4-3-240x64-cog-lcd-module/

now i understand   when you have 22 pins  you loose the parallel mode ....

so many driver ic's and possibilities .... but no access to the cpu code   |O
TRN:
No problem, everybody makes mistakes once and a while :)

Yep, pin 2 is connected to +3.3V, so the bus is parallel
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