XVM-H6 - Sony Car Audio Service Manual (repair manual). Page 9

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1. Display gray scale on the monitor screen.
2. Connect digital multimeter to pin 29 of IC U600.
3. Adjust the semi-fixed VBRI so that the reading on the digital

voltmeter stands at the specified value.

Specified value: 20.6 ± 0.04 V

1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 48 of IC U600.
3. Adjust the semi-fixed VPIC so that the reading on the voltmeter

stands at the specified value.

Specified value: 25.9 ± 0.04 V

1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 2 of IC U600.
3. Adjust the semi-fixed VCNT so that the reading on the voltmeter

stands at the specified value.

Specified value: 1.25 ± 0.04 V

1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 6 of IC U600.
3. Adjust the semi-fixed VCOL so that the reading on the voltmeter

stands at the specified value.

Specified value: 2.58 ± 0.04 V

1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 13 of IC U600.
3. Adjust the semi-fixed VTIN so that the reading on the voltmeter

is at 3.18 ± 0.04 V.

γ

1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 26 of IC U600.
3. Adjust the semi-fixed resistor VGA2 so that the reading on the

voltmeter is at 2.43 ± 0.04 V.

γ

1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 27 of IC U600.
3. Adjust the semi-fixed resistor VGA1 so that the reading on the

voltmeter is at 1.40 ± 0.04 V.

1. Display gray scale on the monitor screen.
2. Connect digital voltmeter to pin 28 of IC U600.
3. Adjust VRGB so that the reading on the voltmeter is at 2.05 ±

0.04 V.

1. Display 5-step gray scale on the monitor screen.
2. Connect oscilloscope to pin 21 of IC U600.
3. Adjust the semi-fixed resistor VRGB so that the level of the signal

on the fifth step from the above stands at the specified value A.

Specified value A: 0.58 ± 0.04 V

4. Adjust the semi-fixed VGA1 so that the level of the signal on the

first step from the above stands at the specified value B.

Specified value B: 3.25 ± 0.04 V

5. Adjust the semi-fixed VBRI so that the level of the signal on the

fourth step from the above stands at the specified value C.

Specified value C: 1.47 ± 0.04 V

6. Repeat items 3 to 5 and adjust the levels of the signals on the

fifth, first and fourth steps to their specified values.

1. Display 5-step gray scale on the monitor screen.
2. Connect oscilloscope to pin 21 specified as G_OUT of IC U600.
3. Measure the black-to-black level.
4. Connect oscilloscope to pin 24 specified as B_OUT of IC U600.
5. Adjust VSUB so that the back-to-black level is equal to the level

measured in item 3.

6. Connect oscilloscope to pin 19 specified as R_OUT of IC U600.

7. Adjust the semi-fixed resistor VSUR so that the back-to-black

level is equal to the level measured in item 3.

1. Display gray scale on the monitor screen.
2. Connect oscilloscope to the Q701 emitter.
3. Adjust the semi-fixed resistor VCOM until the level A of the

output waveform stand at the specified value.

Specified value: 5.83 ± 0.04 V

GND level

A

C

B

black-to-black level

A