When Replacing Eeprom (Memory) Ic - Hitachi P42A01 Service Manual

CONFIRMATION OF CHECK SUM, POWER ON TOTAL HOURS AND MICON VERSION.
Initial total of MEMORY IC, POWER ON total hours and MICON VERSION can 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, POWER ON total hours and MICON VERSION , turn off the power.
NOTE:The each item value might be different according to each set.
MAIN MICON Version
SUB MICON Version
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.
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.
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 POWER on.
11. Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 2 seconds.
12. 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.

WHEN REPLACING EEPROM (MEMORY) IC

INIT
DVP
DVP2
PICENH : E6E5
PDP ON : 0000
ANALOG M: DB0B775091
ANALOG S: DB0C773131
FIG. 1
INIT
PDP ON :
ANALOG M : DB0B775091
ANALOG S : DB0C773131
Initial setting data check sum.
: 2923
: D725
: 7C3F
ADDRESS DATA
0001 82
0000
FIG. 2
C-2
SCALER data check sum.
DV1000 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)