*How to identify the value of the location 0240 on the EEPROM
CALCULATION OF THE NEW VALUES OF THE LOCATIONS
SEPDISP56
Porsche 987 and 997
display installation and modification
WARNING: This process is recommended only to expert and qualified staf
INSTALLATION OF THE DISPLAY SEPDISP56 AND OF THE BACKLIGHT SHEET
• Replace the display in an ambient temperature of 25 °C.
• Replace the backlight placed under the original LCD with the one supplied with the Minitools part to avoid chromatic discrepancies.
Our technicians, for illustrative purposes, have made a video tutorial about how to repair the instrument cluster. To watch it, click on the button below.
1
Remove the original display.
2
Undo and remove the diffuser and the pink original backlight
3
Fit and secure the new Minitools backlight.
4
Re-insert the diffuser.
5
Fit the new Minitools display.
EEPROM MODIFICATION
• After replacing the LCD, switch on the cluster (pin nº 1 negative, pin nº 2 positive) and, with a multimeter, measure the voltage on the PCB on which the display is connected, between the points A and B indicated in picture 1.
• If the voltage measured is between 11,95 V and 12,05 V, no modification is necessary;
• If the voltage detected is, instead, lower than 11,95V or higher than 12,05V, it is necessary to do the modification described in the following paragraph “EEPROM MODIFICATION”.
EEPROM MODIFICATION
NOTE: For this modification it is necessary to use an EEPROM programmer.
We recommend our SEP-EECLIP.
•First, set the programmer reading in hexadecimal (HEX);
• De-solder the 93LC86 EEPROM (highlighted in picture 2), which is located inside the metal enclosure on the rear side of the display PCB.
ATTENTION: Make a backup of the de-soldered EEPROM, before the modification.
• To reach a voltage between 11,95V and 12,05V, it is necessary to modify the value of the location 0240. Please note that increasing or decreasing these locations by 1 HEX unit, the variation will be +/-0,00625V.
If not familiar with hexadecimal calculation, it is possible to use the calculation tool in the box beside, simply typing in the values.
NOTE: For the version that can be used offline, download the PDF.
VERIFICATION
Once these modifications have been done, measure again the voltage between the points A and B and check that it actually is between 11,95V and 12,05V. If not, increase or decrease the location until the value is as close as possible to the correct range.