Sharp 28JF-76E Service Manual page 12

28JF-76E
4. Press volume up/down to adjust to "109 dB/µV".
5. It will be stored automatically.
6. Turn off the receiver by Main switch to exit the Service Mode.
Automatic Gain Control Adjustment (L)
To correctly align the Automatic Gain Control, follow the procedure outlined below:
1. Tune the set into a pattern generator on F-10.
2. Enter the Service Mode.
3. Press the YELLOW button of Remote Control to select "Automatic Gain Control"
4. Press volume up/down to adjust to "103 dB/µV".
5. It will be stored automatically.
6. Turn off the receiver by Main switch to exit the Service Mode.
Automatic Gain Control Adjustment (L')
To correctly align the Automatic Gain Control, follow the procedure outlined below:
1. Tune the set into a pattern generator on F-4.
2. Enter the Service Mode.
3. Press the YELLOW button of Remote Control to select "Automatic Gain Control"
4. Press volume up/down to adjust to "109 dB/µV".
5. It will be stored automatically.
6. Turn off the receiver by Main switch to exit the Service Mode.
Subcarrier adjustment (ONLY PAL)
1. Tune the colour bar signal pattern (Subcarrier PAL).
2. Enter the Service Mode.
3. Press channel up/down buttons of Remote Control to select "Subcarrier adjustment".
4. Press volume up/down buttons of Remote Control to adjust Subcarrier frequency until "OK" appear on screen.
5. Press Stand-by button of Remote Control to store adjust.
6. Turn off the receiver by Main switch to exit the Service Mode.
Changing NVM Data
To change the data contained within the Non Volatile Memory, it is necessary to first select the page the data is stored in,
then the position and finally to change the data itself.
NOTE: The values of "Page, Position and Value" start by "0x". It means that the two next locations are hexadecimal
representations.
The procedure below outlines this process.
1. Enter the Service Mode.
2. Press the GREEN button of Remote Control to access to "NVM / PAGE", use the volume up/down buttons to
change this data (data is shown in hexadecimal format).
3. Press the channel up button to select "NVM / POSITION", use the volume up/down buttons to change this data
(data is shown in hexadecimal format).
4. Press the channel up button to select "NVM / VALUE", use the volume up/down buttons to change this data (data
is shown in hexadecimal format).
5. Once this data has been set, press the stand-by button to store.
6. If another NVM value has to be changed, use the channel down button to select the page or position and repeat
as necessary.
Note:
Do not change any NVM data, unless you have been advised to do so by a Sharp representative. If data is incorrectly
changed, serious damage may occur to the receiver.
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