Sony DSR-20MD, Service Manual

Page: 160 / 225

5-68
Adjusting method:
1) Record color bar signal for two minutes on any tape.
2) Select page: 0, address: 01, and set data: 01.
3) Write the following data in page: C, addresses: 40 to 44, 4B,
5A.
To write the data, press the PAUSE button of the adjusting
remote commander each time data is set.
Page: C, address: 40, data: C0
Page: C, address: 41, data: C0
Page: C, address: 42, data: 90
Page: C, address: 43, data: 90
Page: C, address: 44, data: 90
Page: C, address: 4B, data: 80
Page: C, address: 5A, data: 00
4) Playback the part recorded with the color bar signal.
5) Select page: C, address: 44, increase the data, and read the
data D
1
when the CH1 pulse is set to the whole audio and
video areas.
6) Select page: C, address: 44, decrease data, and read the data
D
2
when the CH1 pulse is set to the whole audio and video
areas.
7) Obtain the average value of D
1
and D
2
, and take it as D
3
.
8) Select page: C, address: 44, set data: D
3
, and press the PAUSE
button of the adjusting remote commander.
9) Select page: C, address: 4B, set data: 00, and press the PAUSE
button of the adjusting remote commander.
10) Select page: C, address: 5A, set data: 8C, and press the PAUSE
button of the adjusting remote commander.
11) Select page: 0, address: 01, and set data: 00.
12) After completing the adjusting, perform “5. AEQ Adjustment”.
Adjusting method:
1) Record color bar signal for two minutes on any tape.
2) Select page: 0, address: 01, and set data: 01.
3) Write the following data in page: C, address: 40 to 43, 47, 4B,
5A.
To write the data, press the PAUSE button of the adjusting
remote commander each time data is set.
Page: C, address: 40, data: C0
Page: C, address: 41, data: C0
Page: C, address: 42, data: 90
Page: C, address: 43, data: 90
Page: C, address: 47, data: C8
Page: C, address: 4B, data: 80
Page: C, address: 5A, data: 00
4) Playback the part recorded with the color bar.
5) Select page: C, address: 47, increase the data, and read the
data D
1
when the CH1 pulse is set to the whole audio and
video areas.
6) Select page: C, address: 47, decrease the data, and read the
data D
2
when the CH1 pulse is set to the whole audio and
video areas.
7) Obtain the average value of D
1
and D
2
, and take it as D
3
.
8) Select page: C, address: 47, set data: D
3
, and press the PAUSE
button of the adjusting remote commander.
9) Select page: C, address: 4B, set data: 0E, and press the PAUSE
button of the adjusting remote commander.
10) Select page: C, address: 5A, set data: 8C, and press the PAUSE
button of the adjusting remote commander.
11) Select page: 0, address: 01, and set data: 00.
12) After completing the adjusting, perform “5. AEQ Adjustment”.
3. CLK DELAY Adjustment (RP-228 Board)
Mode Recording/playback
Signal Color bar
Measurement Point
CH1: Pin
qk
of CN775 (C1ERP)
CH2: Pin
6
of CN775 (JSWP)
Measuring Instrument
Oscilloscope
Trigger source: CH2
Adjustment Page C
Adjustment Address 47
4. AGC Center Level Adjustment (RP-228 Board)
Mode Recording/playback
Signal Color bar
Measurement Point
CH1: Pin qk of CN775 (C1ERP)
CH2: Pin
6
of CN775 (JSWP)
Measuring Instrument
Oscilloscope
Trigger source: CH2
Adjustment Page C
Adjustment Address 44
CH1
CH2
CH1
When the CH1 pulse is set.
When the CH1 pulse is not set.
EVEN ch
EVEN ch
3.33 msec
CH2
Fig. 5-3-6.
Fig. 5-3-7.
CH1
CH2
CH1
When the CH1 pulse is set.
When the CH1 pulse is not set.
EVEN ch
EVEN ch
3.33 msec
CH2