21HS-50 (serv.man8) - Sharp TV Service Manual (repair manual). Page 6

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All required adjustments for servicing this TV set, may be done in “service mode”, excepting G2 and FOCUS.

1.

Turn the receiver on and ensure that it is tuned into a test pattern.

2.

Turn the receiver off using the mains switch.

3.

Press the volume down and channel up buttons together. See Fig.1.

4.

Continue pressing the volume down and channel up buttons while turning
the mains on using the mains switch. See Fig.1.

5.

Keep pressing the volume down and channel up buttons until the picture appears.

6.

When <<SHARPX X VXX.XX>> appears on the screen, release the two buttons.

7.

The receiver is now in the service mode. See Fig. 2.

To move between the various service mode functions, use the channel up and down buttons. See Fig. 3.

Use the volume buttons to change the data to the desired value. See Fig. 3.

The data will be stored automatically when exiting the service mode.  To exit the service mode press the standby button
on the remote control or turn the receiver off with the mains switch.

XXXX:

  Adjustment
      (Yellow)

  Value
 (Green)

SHARP X    X  VXX.XX

  STS0: XXXX XXXX
  STS1: XXXX XXXX
  STS2: XXXX XXXX

XX:

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Fig.1