*How to identify 03B3 location value on the EEPROM programmer
CALCULATION OF THE NEW VALUES OF THE LOCATIONS
01E4 LOCATION
01E5 LOCATION
01E6 LOCATION
01E7 LOCATION
*How to identify 01E4, 01E5, 01E6 and 01E7 locations values on the EEPROM
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SEPDISP06
Modification for Mercedes C-Class W203 and G-Class W463 LCD display
Before installing the new SEPDISP06 display, please read the following instructions carefully. For illustrative purposes, our technicians have produced a video tutorial on how to carry out the odometer repair.
DO NOT SKIP ANY STEPS.
ATTENTION: THESE OPERATIONS ARE ONLY RECOMMENDED FOR EXPERIENCED PERSONNEL.
The following modification is necessary for the correct functioning of sepdisp06 display.
- Replace the display in an ambient temperature of 25 °C.
- After replacing the LCD, switch on the cluster (pin no. 1 negative, pin no. 5 and pin no. 6 positive).
- Identify the PCB of your dashboard (PCB1 or PCB2) and measure the voltage between A and B points.
- If the voltage measured is between 7.7V and 7.8V, no modification is necessary;
- If the voltage detected is instead lower than 7.7V or higher than 7.8V, 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.
• De-solder the 93C86 EEPROM from the PCB;
• Set the programmer reading in 8 bit hexadecimal (HEX);
ATTENTION: make a backup of the EEPROM, before the modification.
• To reach a voltage between 7.7V and 7.8V, identify the 01E4, 01E5, 01E6 and 01E7 locations and modify their values: increasing or decreasing the 4 locations values by 1 HEX unit, the variation will be +/- 0.09 V.
If not familiar with hexadecimal calculation, it is possibile to use the calculation tool in the box beside, simply typing in the values.
Once these operations have been done, solder back the 93C86 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 7.7V and 7.8V has actually been reached. If not, decrease or increase the value of the location until the voltage is between that range.
WARNING: if the VOLTAGE HAS NOT CHANGED at all after the EEPROM modification, see the following page “PROBLEMS AND SOLUTIONS”.
PROBLEMS AND SOLUTIONS
If you’ve done the modification on an instrument cluster with the “PCB1” and the voltage has NOT changed, please CONTACT US by e-mail at [email protected].
If you’ve done the modification on an instrument cluster with the “PCB2” instead, and the voltage has NOT changed FOLLOW THE INSTRUCTIONS shown in the following paragraph “EEPROM MODIFICATION”.
Eeprom modification
• De-solder again the 93C86 EEPROM from the PCB;
•Set the programmer reading in 8 bit hexadecimal (HEX);
ATTENTION: upload the backup previously made on the EEPROM, to restore the original data.
• To reach a voltage between 7.7V and 7.8V, identify the location 03B3 and modify its value: decreasing the location value by 1 HEX unit, the variation will be + 0.0125V (or vice versa).
If not familiar with hexadecimal calculation, it is possibile to use the calculation tool in the box beside, simply typing in the values.
Once these operations have been done, solder back the 93C86 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 7.7V and 7.8V has actually been reached. If not, decrease or increase the value of the location until the voltage is between that range.
WARNING: if the VOLTAGE HAS NOT CHANGED at all after the EEPROM modification, CONTACT US.
CALCULATION OF THE NEW VALUE OF THE LOCATION