Sharp LC-26SH12U Service Manual - Page 15

WHEN REPLACING EEPROM (MEMORY) IC CONFIRMATION OF CHECK SUM, POWER ON TOTAL HOURS AND MICON VERSION Initial total of MEMORY IC, POWER ON total hours and MICON VERSIONcan be checked on the screen. Total hours are displayed in 16 system of notation. NOTE: If you set a factory initialization, the total hours is reset to "0". Please refer to "CONFIRMATION OF INITIAL DATA" when SUM DATA is not corresponding. 1. Turn on the POWER, and set to the TV mode. 2. Set the VOLUME to minimum. 3. Press both VOL. DOWN button on the set and Channel button (8) on the remote control for more than 2 seconds. 4. After the confirmation of each check sum, turn off the power. NOTE: The each item value might be different according to each set. MICON Version Digital TV MICON Fimware HCS CHK SUM : 07EA HRM CHK SUM : 9BD4 LCD PWR ON : 0000 OEC6088A_T039 DTV CA03B72232 FIG. 1 Initial setting data check sum. Rom correction data check sum. POWER ON total hours. = (16 x 16 x 16 x thousands digit value) + (16 x 16 x hundreds digit value) + (16 x tens digit value) + (ones digit value) CONFIRMATION OF INITIAL DATA If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to INITIAL SETTING TABLE (Attached "INITIAL DATA"). 1. Turn on the POWER, and set to the TV mode. 2. Set the VOLUME to minimum. 3. Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 2 seconds. ADDRESS and DATA should appear as FIG 2. ADDRESS DATA HCS 00 00 HRM 0600 02 OEC6088A_T039 DTV CA03B72232 FIG. 2 4. ADDRESS is now selected and should "blink". Using the UP/DOWN buton on the remote, step through the ADDRESS until required ADDRESS to be changed is reached. 5. Press LEFT/RIGHT button to select DATA. When DATA is selected, it will "blink". 6. Again, step through the DATA using UP/DOWN button until required DATA value has been selected. 7. Pressing LEFT/RIGHT button will take you back to ADDRESS for further selection if necessary. 8. Repeat steps 4 to 6 until all data has been checked. 9. When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input. After the data input, set to the initializing of shipping. 10. Turn on the POWER. 11. Set the VOLUME to minimum. 12. Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 2 seconds. 13. After the finishing of the initializing of shipping, the unit will turn off automatically. The unit will now have the correct DATA for the new MEMORY IC. C-3