When Replacing Eeprom (Memory) Ic - Toshiba MW20F52 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.
+0
INI
00
6F
10 40
20 99
30 45
40 88
50 05
1F
60
70 24
80 2B
Enter DATA SET mode by setting VOLUME to minimum.
1.
2. Press both VOL. DOWN button on the set and the 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 UP or 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 UP or 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.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
8.
After the data input, set to the initializing of shipping.
9. Turn POWER on.
10. Press both VOL. DOWN button on the set and the 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.

WHEN REPLACING EEPROM (MEMORY) IC

+1 +2 +3 +4 +5
40 34 00 C3 DF
0F E3 52 03 02
96 8B 9F B7 AA
31 33 FF 00
CD
89 88 FF FF ---
08 0A 0B 0D 10
1F 1F 20 20 20
25 25 25 26 26
2C 2D 2D 2E 30
+6 +7 +8 +9 +A
D0
47 22 86 44
00 48 00 F6 15
91 B6 1A 0B 3D
00 00 23 FF
0D
--- --- --- ---
---
12 15 17 19 1B
21 21 22 22 22
26 27 27 28 28
32 35 36 37 38
Table 1
ADDRESS DATA
INIT 00 6F
POWER ON 0010
PLAY/REC 0003
Fig. 1
C4-1
+B +C +D +E +F
18 A6 01 86 65
4B 1F 54 83 B1
08 37 16 27 30
FF FF 80 88 83
--- --- --- --- ---
1D 1D 1E 1E 1E
23 23 23 24 24
29 29 2A 2A 2B
38 39 3B 3C 3F