When Replacing Eeprom (Memory) Ic - Toshiba 20AF46 Service Manual

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 TABLE 1.
NOTE: No need setting for after INI 5F due to the adjustment value.
INI +0 +1 +2 +3
00 50 E8 0A 45
10 50 00 00 00
20 01 04 07 09
30 18 19 19 1A
40 1F 1F 20 20
50 26 26 27 27
1. Enter DATA SET mode by setting VOLUME to minimum.
2. Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 1 second.
ADDRESS and DATA should appear as FIG 1.
3. ADDRESS is now selected and should "blink". Using the VOL. UP/DOWN button on the remote, step through the ADDRESS
until required ADDRESS to be changed is reached.
4. Press ENTER to select DATA. When DATA is selected, it will "blink".
5. Again, step through the DATA using VOL. UP/DOWN button until required DATA value has been selected.
6. Pressing ENTER will take you back to ADDRESS for further selection if necessary.
7. Repeat steps 3 to 6 until all data has been checked.
8. 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.
9. Turn POWER on.
10. Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 1 second.
11. 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

+4 +5 +6 +7 +8
5E B3 24 B5 *1
03 00 00 00 3F
0B 0D 0F 10 11
1A 1B 1B 1B 1C
20 21 21 21 22
28 28 29 29 2A
+9 +A +B +C +D
AC 0B 84 40 40
0F 0D E2 94 88
12 13 14 15 16
1C 1C 1D 1D 1E
22 23 23 24 24
2A 2B 2B 2C 2C
Table 1
C-2
+E +F
40 7F
3F 00
17 18
1E 1F
*1
USA
INI
25 25
08
2D 2D
CANADA
3B 3A
20AF46/20AF46C