Sony GV-D300 Operating Instructions (primary manual), Service Manual

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5-11
3-3. SYSTEM CONTROL SYSTEM ADJUSTMENT
1. Battery End Adjustment (CB-61 board)
Set the battery end voltage.
If the voltage is incorrect, the life of the battery will shorten.
The image at the battery end will also be rough.
Mode Recording
Signal Color bar
Measurement Point LCD display of the adjustment remote
Measuring Instrument commander
Adjustment Page D
Adjustment Address 28 to 2C, 37
Switch setting:
1)
LCD screen .................................................................... Open
Connection:
1)
Connect the regulated power supply and the digital voltmeter
to the battery terminal as shown in Fig. 5-3-3.
Adjusting method:
1)
Adjust the output voltage of the regulated power supply so that
the digital voltmeter display is 6.1 ± 0.1Vdc.
2) Turn off the power supply.
3) Turn on the HOLD switch of the adjustment remote commander.
4) Turn on the power supply.
5) Load a cassette, and set to the camera recording mode.
6) Select page: 0, address: 01, and set data: 01.
7) Decrease the output voltage of the regulated power supply so
that the digital voltmeter display is 5.30 ± 0.01Vdc.
8) Select page: 2, address: 51, read the data, and this data is named
Dref.
9) Select page: D, address: 28, set data: Dref, and then press the
PAUSE button of the adjustment remote commander.
10) Select page: D, address: 37, set data: Dref, and then press the
PAUSE button of the adjustment remote commander.
11) Convert Dref to decimal notation, and obtain Dref’. (Refer to
Table 5-4-2. “Hexadecimal-decimal conversion table” of “5-4.
Service mode”)
12) Calculate D
29
', D
2A
’, D
2B
’ and D
2C
’ using following equations
(decimal calculation), convert it to a hexadecimal number, and
input each adjustment address.
Address: 29
D
29
' = Dref’+11
Address: 2A D
2A
’ = Dref’+36
Address: 2B D
2B
’ = Dref’+58
Address: 2C D
2B
’ = Dref’+66
Note:
After setting each data, be sure to press the PAUSE button.
13) Select page: 0, address: 01, and set data: 00.
Digital voltmeter
Regulated power supply
5.30
±
0.01V
Battery terminal
GV-D300/D300E/D900/D900E
Fig. 5-3-3