When Replacing Eeprom (Memory) Ic - Toshiba VTW2185 Service Manual

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.
NOTE: Initial Data setting will not be possible if clock has been set. To reset clock, either unplug AC cord and allow
at least 30 minutes before Power On or alternatively, discharge backup capacitor.
No need setting for after INI 11F due to the adjustment value.
+0 +1
INI
0B0 --- ---
04 6B
0C0
0D0 3A 0F
0E0 00 DF
0F0 A0 C4
100 27 03
00 03
110
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 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 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 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.
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+2 +3 +4 +5 +6 +7
--- --- 14 10 80 84
98 A2 D8 05 63 65
11 20 45 64 64 65
6F F9 5F 01 FF 23
20 08 BF 50 2B B5
57 15 00 00 00 00
04 20 40 20 A0 00
Table 1
ADDRESS DATA
INIT 0B4
POWER ON 0010
PLAY/REC
Fig. 1
C4-1
+A
+8 +9
+B +C +D
C0 4C 95 C7 C4 C9
66 27
1B 3B 28 17
64 CA 00 37 87 0C
F9 6F 9F B2 9A 97
C1 41 00 2D 0C 0E
00 00 00 00 00 00
00 40
00 00 00 97
14
0003
+E +F
0E E1
15 1B
87 5F
8C B2
7A 00
82 00
30 01