Sharp 66GF-64H Service Manual page 10

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. The procedure below outlines this process.
1. While on ALTER NVM PAGE, use the volume up/down buttons to change this data (data is shown in hexadecimal
format).
2. Press the channel up button and ALTER NVM POSITION appears, use the volume up/down buttons to change this data
(data is shown in hexadecimal format).
3. Press the channel up button and ALTER NVM VALUE appears, use the volume up/down buttons to change this data
(data is shown in hexadecimal format).
4. Once this data has been set, press the standby button to store.
5. 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.
Procedure to re-set the NVM:
Modify the NVM values as in the below table.
NVM Page
00
0C
0C
0D
0D
All the above values are hexadecimal.
Contrast Adjustments
Three types of contrast levels can be varied as listed be-
low:
• TELETEXT MIX MODE CONTRAST
• TELETEXT CONTRAST
• OSD CONTRAST
Use the volume up/down buttons to adjust to a suitable level,
then press the standby button to store.
DVCO Adjustment (PAL)
Carry out the DVCO Adjustment (PAL) as shown below:
1. Receive a Phillips pattern signal.
2. While in the DVCO ADJUSTMENT (PAL) menu, press
the standby button.
3. The adjustment will be carried out automatically and
stored.
DVCO Adjustment (NTSC)
No adjustment required.
Auto Installation On/Off
To return the receiver to the original Auto Installation mode,
using the volume up or down button, set the Auto Installa-
tion On/Off to On. This setting is automatically stored and
when the receiver is turned on the next time it will start up in
Auto Installation mode.
NVM Position Default Value
7E
20 Different on every set
61 Different on every set
3C Different on every set
A5 Different on every set
AGC Adjustment
To correctly align the Automatic Gain Control, follow the
procedure outlined below:
1. Tune the set into a pattern generator on CH10.
2. Adjust the signal strength of the pattern generator to 57uV
3. Enter the service mode.
4. Enter the AGC Adjustment menu.
5. Press the standby button on the remote control.
6. The adjustment will be carried out and stored
automatically.
AFT Adjustment
To correctly align the Automatic Fine Tune, follow the
procedure outlined below:
1. Tune the set into a pattern generator on CH69.
2. Enter the service mode.
3. Enter the AFT Adjustment menu.
4. Press the standby button on the remote control.
5. The adjustment will be carried out and stored
automatically.
9
New value
A5 A6
Default value + 1
Default value + 1
Default value + 1
Default value + 1
66GF-64H