Sony DSR-20MD, Service Manual

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3-4. SERVO SYSTEM ADJUSTMENTS
1. Switching Position Adjustment (CM-56 Board)
Mode Playback
signal SW/OL reference tape
Measurement Point
Page: 3, address: 03 on displayed data of
adjusting remote commander
Measuring Instrument Adjusting remote commander
Adjustment Page C
Adjustment Address 4C, 4D, 4E, 4F
Specified Value “00”
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 0E, and press the PAUSE
button of the adjusting remote commander.
3) Select page: 3, address: 02, and confirm that the data changes
from “0E” to “00”.
4) Select page: 3, address: 03, and confirm that the data is “00”.
5) Turn OFF the HOLD switch on he adjusting remote commander
and wait for more than 2 seconds. (The adjusted data are auto-
matically written to page: C, address: 4C to 4F)
6) Turn ON the HOLD switch on the adjusting remote com-
mander.
7) Select page: 0, address: 01, and set data: 00.
8) Stop the tape playback.
9) Turn the POWER switch OFF.
2. Capstan FG Duty Adjustment (CM-56 Board)
Mode Playback
signal Arbitrary tape
Measurement Point
Page: 3, address: 03 on displayed data of
adjusting remote commander
Measuring Instrument Adjusting remote commander
Adjustment Page C
Adjustment Address 50, 51
Specified Value “00”
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 15, and press the PAUSE
button of the adjusting remote commander.
3) Select page: 3, address: 02, and confirm that the data changes
from “15” to “00”.
4) Select page: 3, address: 03, and confirm that the data is the
following value
When “00”: Normal
When “01”: Faulty
Perform the following adjustment only when “00” is displayed.
5) Select page: 3, address: 04 and 05, read the data, and take the
values as D
04
and D
05
respectively.
(The data on page: 3, address: 05 must be 2F to 3F)
6) Select page: C, address: 50, set data: D
04
, and press the PAUSE
button of the adjusting remote commander.
7) Select page: C, address: 51, set data: D
05
, and press the PAUSE
button of the adjusting remote commander.
8) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
9) Select page: 0, address: 01, and set data: 00.
10) Stop the tape playback.
11) Turn the POWER switch OFF.