Sharp 28JF-76E Service Manual page 13

Flag NVM write ON/OFF
To use this function to rewrite the NVM. It is only necessary when the software of Flash memory (IC6003) change .
1. Enter the Service Mode.
2. Press the Sound mode button(29) of Remote Control. "FLAG NVM WRITE ON" is activated.
3. To exit the Service Mode, press the volume down and channel up buttons on the front of the receiver at the same
time.
4. When "RE-WRITING NVM" appears on the screen, the receiver is now rewriting datas in NVM memory.
5. When the process finish the TV turns off and turn on automatically.
6. After rewriting NVM is necessary to adjust the TV set (Geometries, AGC, G2 and Colour Adjustments)
Flag Autoinstall ON/OFF
To use this function to activated Autoinstall mode.
1. Enter the Service Mode.
2. Press MENU button of Remote Control to select "FLAG AUTOINSTALL ON".
3. Turn off the receiver by Main switch.
4. Turn on the receiver by Main switch.
5. Now the receiver shows the Autoinstallation menu as shown in Figure 17.
Protections Cancel
To cancel the PIN protection, follow the procedure outlined below:
1. Connect a Test Pattern signal to the antenna terminal.
2. Press main switch to OFF.
3. Enter in Service Mode. See procedure on Page 7.
4. When the set starts up it will be in Service Mode. See Figure 2 on Page 7.
5. Press main switch to OFF.
6. The protection has been cancelled.
How To Replace a Damaged NVM by a Blank One
To replace the NVM, follow the procedure outlined below:
1. Change IC6010 by a blank one.
2. Switch on the TV. Basic data is written automatically (Blue back appears when process is finished).
3. Proceed to rewrite NVM described above (Flag NVM write ON/OFF).
4. Proceed Autoinstallation as described above (Flag Autoinstall ON/OFF).
Figure 17: Auto Installation Menu
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28JF-76E