• Replace the display in an ambient temperature of
• After replacing the LCD, switch on the cluster (pin no. 16 positive, pin no. 18 negative) and measure the voltage between A and B points (Pic.1).
• If the voltage measured is between 6.3V and 6.4V, no modification is necessary;
• If the voltage detected is instead lower than 6.3V or higher than 6.4V, it is necessary to do the modification described in the following paragraph “EEPROM MODIFICATION“.
NOTE: For this modification, it is necessary to use an EEPROM programmer.
We recommend our SEP-EECLIP.
• De-solder the EEPROM 93C66 located on the PCB (Pic. 1);
• First, set the programmer reading in hexadecimal (HEX).
ATTENTION: make a backup of the EEPROM, before the modification.
• To reach a voltage between 6.3V and 6.4V, identify the 0122, 0123, 0124, 0125, 0126 and 0127 locations and modify their values: increasing or decreasing the 6 values by 1 HEX unit, the variation will be +/- 0.10 V.
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 oflline version download PDF.
Once these operations have been done, solder back the 93C66 EEPROM on the PCB, switch on the instrument cluster and check again the tension between points A and B.
Verify, then if a voltage between 6.3V and 6.4V has actually been reached. If not, decrease or increase the values of the locations until the voltage is between that range.