On both the service printing on the copper and the component side, functional blocks are given. These blocks indicate the functionally of that specific part of the circuit.
SERVICE DEFAULT MODE
- The CTN software contains a "Service Default Mode" .
- To activate this mode the service pin of the microcomputer (pin 7-IC7600) should be short-circuited to earth while switching on the set with the mains switch (shorting pin 7can be done on the copper side via the 2 copper squares or on the component side by pin 7 and the shielding of the µC).
- When the set in the Service Default Mode and "S" appears on the screen.
- In the Service Default Mode the set is in a pre-defined mode In this mode all analog settings (volume, contrast, brightness and saturation) are in the mid position and the set is tuned to program number 1.
- The Service Default Mode is left via switching off the set by the mains switch or via standby on the remote control.
ERROR MESSAGES
F1 en: OSD y LED parpadea => Error interno µC => IC7600
F2 en? OSD y LED parpadea => Error Eeprom => IC7685
- After replacing the microcomputer first solder the shielding before testing the set. This is needed as the shielding is used for earth connection.
- If this is not done the set can switch into protection mode.
POWER SUPPLY SCHEMATIC
