TOSHIBA - 46H83 - 51H83 - 57H83 SERVICE MODE
APPLICABLE TO TOSHIBA: 46H83_46HX83_51H83_51HX83_57H83_57HX83_65H83_65HX83- The V-Chip PIN code can be reset, if the service is required or the customer has forgotten the V-Chip PIN code, by pressing "RECALL" button on the remote [4] times within [5] seconds while at the PIN Code entry screen.
- To enter service mode, press "Mute" button twice on the remote control.
- Press "Mute" button again to keep pressing.
- While pressing the "Mute" button press 'Menu" button on the front panel of the TV set.
On service mode, self check can be performed to test the SCA & SDL lines through the TV.
- Enter Adjustment Mode.
- Press the '9" key on the remote control to display self-diagnostic results on the screen.
- Pressing the "9" key again will return to Service Mode.
- Self diagnostic only shows one communication error at a time. Once communication is restored, run the self diagnostic again until "OK" is displayed to verify there are no more errors.
Initialization of
the self check is only required to clear the protect indicator (Power
000000). All other indicators are cleared when the self check
is excited. To clear the power counter, push the "Recall" button on
the remote control and "Channel Dn" button on the TV.
While in service menu, do not push "Channel Up" on the TV and
'Recall' on the remote control. This will cause initialization of
memory IC. After replacement of memory IC, this should be done.
SELF DIAGNOSIS
- The microprocessor has a self diagnostic feature that sends test information to each slave circuits, receives a test signal from each slave in response, and displays the result on the screen. If acknowledgement is not received, the location number of the non-responsive slave is displayed.
- If a slave circuit pulls the clock [SCL] or data [SDA] line to ground, the microprocessor cannot communicate with any of the slave circuits. In the event such a condition occurs, the power LED will flash at a rate of [1] per second. Similarly, in the event of a protective shut down, it will flash Twice a second. The type of condition can be easly determined by the frequency of flashes.
