When Replacing Eeprom (Memory) Ic - Toshiba SD-25VLSR 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 INIT FC.
INI
+0
B0 ---
C0 E7
D0 00
E0
00
F0 5F
1. Connect the set to TV Monitor.
2. Turn on the POWER, and set to the VCR mode.
3. Press both CH UP button on the set and the FF button on the set for more than 2 seconds.
ADDRESS and DATA will appear on TV Monitor as Fig 1.
4. ADDRESS is now selected and should "blink". Using the Tracking + or - button on the remote, step through the ADDRESS
until required ADDRESS to be changed is reached.
5. Press ENTER to select DATA. When DATA is selected, it will "blink".
6. Again, step through the DATA using Tracking + or - button until required DATA value has been selected.
7. Pressing ENTER will take you back to ADDRESS for further selection if necessary.
8. Repeat steps 4 to 7 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 on the POWER, and set to the VCR mode.
11. Press both CH UP button on the set and the PLAY button on the set 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

+1 +2 +3 +4 +5
--- --- --- --- ---
5F 3C 89 9F 82
85 52 38 60 35
00 00 00 65 5E
00 00 00 02 55
+6 +7 +8 +9 +A
--- --- --- 1D 58
31 B7 89 B2 B2
65 5F 00 BE 1B
00 AF 1A 00 00
00 7B 0E 26 00
Table 1
ADDRESS DATA
INIT B9 1D
PLAY/REC 0010
Fig. 1
C4-2
+B +C +D +E +F
B2 4D 00 A2 7E
9A 97 8C 00 40
F9 DF 00 00 00
5F 00 97 2C FA
00 90 --- --- ---