When Replacing Eeprom (Memory) Ic - Toshiba 50HP16 Service Manual

CONFIRMATION OF CHECK SUM, POWER ON TOTAL HOURS, MICON VERSION AND
DIGITAL TV MICON FIRMWARE
Initial total of MEMORY IC, POWER ON total hours, MICON VERSION and Digital TV MICON Firmware 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, MICON VERSION and Digital TV MICON
Firmware, turn off the power.
*1 DVP1 is different according to each set.
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").
Turn on the POWER, and set to the TV mode.
1.
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 RIGHT/LEFT 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 RIGHT/LEFT 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

MICON Version
INIT : 7075
VOLUME : 2E25
ROM : 0000
ADC : C18B
DVP1 : 4765 *1
DVP2 : 08D5
PICENH : 6A7C
PDP ON :0001
OEC7147B_007
FIG. 1
ADDRESS DATA
INIT 0000 00
PDP ON 0001
OEC7147B_007
DTV d-l63131
INIT :0000
ROM : 0000
VOLUME : 2E25
FIG. 2
C-2
Initial setting data check sum.
VOLUME CURVE data check sum.
Rom correction data check sum.
AD CONVERTER data check sum.
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)