When Replacing Eeprom( Memory) Ic - Toshiba 21S23N Service Manual

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WHEN REPLACING EEPROM (MEMORY) IC
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.
INI
+0
00 ---
10 10
20 53
30 00
40 0F
50 47
60 54
70 5C
80 22
90 5E
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 2 seconds.
ADDRESS and DATA should appear as FIG 1.
3. ADDRESS is now selected and should "blink". Using the VOL. +/- button on the remote, step through the ADDRESS until
required ADDRESS to be changed is reached.
4. Press OK to select DATA. When DATA is selected, it will "blink".
5. Again, step through the DATA using VOL. +/- button until required DATA value has been selected.
6. Pressing OK 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 2 seconds.
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.
+1 +2 +3 +4 +5
00 38 23 18 71
00 80 80 80 3C
26 2D 6D C0 00
95 A7 7F 07 00
23 27 2B 2F 33
48 49 4A 4B 4C
54 55 55 56 56
5C 5D 5D 5E 5E
25 CD CF D3 D8
5F --- --- --- ---
+6 +7 +8 +9 +A +B
80 48 00 47 33
00 BA 06 9F 33
44 20 0A 00 18
40 00 00 00 00
37 3B 3F 40 41
4D 4E 4F 50 51
57 57 58 58 59
5F 5F 60 60 61
94 97 99 52 54
--- --- --- --- ---
Table 1
ADDRESS DATA
INIT 01 00
CRT ON 0010
Fig. 1
C-2
+C +D +E +F
05 03 00 06 73
80 00 02 1A 25
1E 00 DF CA 05
00 00 00 00 00
42 43 44 45 46
51 52 52 53 53
59 5A 5A 5B 5B
61 62 63 64 65
56 57 59 5B 5D
--- --- --- --- ---