28KF-84H (serv.man18) - Sharp TV Service Manual (repair manual). Page 12

4. Once this data has been set, press the stand-by 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.

Three types of contrast levels can be varied as listed below:

• 

TELETEXT MIX MODE CONTRAST

• 

TELETEXT CONTRAST

• 

OSD CONTRAST

Use the volume up/down buttons to adjust to a suitable level, they will be stored automatically.

Carry out the DVCO Adjustment (PAL) as shown below:
1. Receive a color pattern signal (PAL).
2. While in the DVCO ADJUSTMENT (PAL) menu, press the stand-by button.
3. The adjustment will be carried out automatically and stored.

Carry out the DVCO Adjustment (NTSC) as shown below:

1. Receive a color pattern signal (NTSC 3.58).
2. While in the DVCO ADJUSTMENT (NTSC) menu, press the stand-by button.
3. The adjustment will be carried out automatically and stored.

To correctly align the Automatic Gain Control, follow the procedure outlined below:

1. Tune the set into a pattern generator on  CH-21.
2. Adjust the signal strength of the pattern generator to 57dB/uV.
3. Enter the Service Mode.
4. Press the channel up button of Remote Control to select  “Automatic Gain Control”.
5. Press the stand-by button on the remote control.
6. The adustment will be carried out and stored automatically.

To return the receiver to the original Auto Installation mode, using the volume up or down button, set the Auto Installation
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.

In order to reset the PostCode when password is not on mind, enter and exit the Service Mode.