Toshiba W-704 Service Manual page 89

2-1. PIF Circuit
2-1-1. In Case of IC01 is Replaced
When IC01 (µPC1852) is replaced, the EEPROM data in the VCR is required to memorize a new set of default values as
initial alignment. So perform the following procedures:
1. Press the channel up/down buttons on the VCR simultaneously for more than five seconds while the unit is in the
power on mode.
2. And then within two seconds, press the number 9 button on the remote control unit.
3. The following data will be set in the corresponding address as tabulated:
4. Press power button to set the unit to power off mode.
5. Pull out the power cord plug from the AC outlet once and insert the power cord plug into the AC outlet again.
6. The initialization of default data for MTS IC is now completed.
The above-mentioned procedure will only change the software settings of the MTS.
If the channel separation test still fails, proceed to do step 7.
7. • Delete Jumper JP001.
• Add R008 (variable resistor 20 kΩ).
• Add R009 (resistor 10 kΩ).
• Change RD02 to resistor 11 kΩ.
• Change RD03 to 0 ohm maxi.
• Tune R008 to achieve the best possible channel separation.
P990
1
Tuner
R008
ZX01
Main Board
Address
14
15
16
17
18
19
H001
JP001
16
R008
R009
Fig. 2-1-1
5
P801
P506
Power
Supply
Data
56
19
20
16
12
1d
RD03 CD07
RD02
IC01
7