Sony DSR-20MD, Service Manual

Page: 176 / 225

5-84
Note 1: Make sure that the BEEP on the Menu screen is set to
“ON”.
Connection of Equipment:
Connect a regulated power supply and a digital voltmeter to the
DC IN terminal.
Adjusting Method:
1) Adjust the output voltage of regulated power supply so that a
digital voltmeter displays 11.0 ± 0.05 V.
2) Select page: 5, address: 2A, and read displayed data on the
adjuting remote commander, and assume it as D
0
.
3) Select page: E, address: 1D, set data: D
0
, and press the PAUSE
button on the adjusting remote commander.
4) Convert “D
0
” read in 2) to decimal notation, and obtain D
0
'.
5) Calculate D
1
', D
2
' using the following equations (decimal no-
tation calculation).
D
1
' = D
0
' – 6
D
2
' = D
0
' – 12
6) Convert D
1
' to hexadecimal notation, and obtain D
1
.
7) Select page: E, address: 1E, set data: D
1
, and press the PAUSE
button on the adjusting remote commander.
8) Convert D
2
' to hexadecimal notation, and obtain D
2
.
9) Select page: E, address: 1F, set data: D
2
, and press the PAUSE
button on the adjusting remote commander.
10) Confirm the display and operation of the fluorescent display
tube, when the voltage input from DC IN terminal is lowered
from 12 V.
Input of DC 12 V
: Normal operation
Input of DC 10.8 V : Beep sounds and “dc Lo” is displayed.
Input of DC 10.3 V : Beep sounds and the standby mode is ac-
tivated after 2 seconds.
11) Further lower the voltage, and check the voltage when STBY
indicator (red LED) turns off.
Specification: The power relay must turns off when Vdc =
9.0 V – 9.5 V.
12) On the contrary, raise the voltage, and check the voltage when
STBY indicator (red LED) turns on.
Specification: The power relay must turns on when Vdc =
10.5 V – 11.0 V.
+
–
Regulated power supply
Digital voltmeter
+
–
VTR
DC IN
terminal
5. Battery Down Adjustment and Confirmation
Mode Stop
Signal Any
Displayed data on page 5, address 2A
Test point (LCD display of the adjusting remote com-
mander)
Measuring Instrument Adjusting remote commander
Adjustment page E
Adjustment address 1D, 1E, 1F
Fig. 5-3-32.