Sharp 28JS-74E Service Manual page 12

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28JS-74E
DVCO Adjustment (NTSC)
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.
Automatic Gain Control Adjustment (B/G, D/K, I)
To correctly align the Automatic Gain Control, follow the procedure outlined below:
1. Tune the set into a pattern generator on E-12 (B/G).
2. Enter the Service Mode.
3. Press the channel up button of Remote Control to select "Automatic Gain Control"
4. Press volume up/down to adjust to "109 dB/mV".
5. It will be stored automatically.
6. Turn off the receiver by Main switch to exit the Service Mode.
Automatic Gain Control Adjustment (L, 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 Channel up button of Remote Control to select "Automatic Gain Control"
4. Press volume up/down to adjust to "103 dB/mV".
5. It will be stored automatically.
6. Turn off the receiver by Main switch to exit the Service Mode.
Auto Installation On/Off
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.
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