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Sony DCR-PC7 Service Manual page 80

Digital video camera recorder
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4. ID Port Threshold Level Adjustment
(VC-183 Board)
Mode
Stop
Adjustment Page
D
59, 5A
Adjustment Address
Connnection: Eject the cassette and connect the following.
1) Conncet CHIME SDA terminal of 4-PIN connector on the
mechanism deck and CHIME GND terminal of the connector
with the 645 Ω resistor (accuracy ± 1%).
645 Ω resitor = 620 Ω resistor + 15 Ω resistor + 10 Ω resistor
620 Ω resistor (Parts code : 1-215-416-00)
15 Ω resistor (Parts code : 1-215-377-00)
10 Ω resistor (Parts code : 1-215-373-31)
2) Connect CHIME SCK terminal of 4-PIN connector on the
mechanism deck and CHIME GND terminal of the connector
with the 3.3 kΩ resistor (accuracy ± 1%)
3.3 kΩ resistor (Parts code : 1-215-433-00)
Adjusting method:
1) Set the data: 01 to page: 1, address: 00.
2) Set the data: 10 to page: 5, address: 00.
3) Read the data of page: 5, address: 07, and take it as D
(D
is "10" to "54" .)
07
4) Set D
to page: D, address: 59, and press the PAUSE button of
07
the adjusting remote commander.
5) Read the data of page: 5, address: 08, and take it as D
(D
is "60" to "9D" .)
08
6) Set D
to page: D, address: 5A, and press the PAUSE button of
08
the adjusting remote commander.
7) Set the data: 30 to page: 5, address: 00.
8) Set the data: 00 to page: 1, address: 00.
CHIME GND
CHIME SCK
CHIME SDA
CHIME VDD
645 Ω
Fig. 6-3-4.
.
07
.
08
REC PROOF
switch
4-PIN
connector
3.3 k Ω
5. Battery End Adjustment
Regulates the battery end voltage.
If the voltage changes, the life of the battery will be shorten, or the
battery end image will be distorted.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Setting of switch
1) Auto focus switch .................................................................. Off
Connection
1) Connect the regulated power supply and digital voltmeter to
battery terminals as shown in the figure 6-3-5.
Regulated power
supply
5.30 ± 0.01 Vcd
Digital voltmeter
Adjusting method:
1) Adjust the regulated power supply output voltage so that the digital
voltmeter display becomes 6.1 ± 0.1 Vdc.
2) Set data: 01 to page: 1, address: 00.
3) Set the camera recording mode.
4) Decrease the voltage so that the digital voltmeter display becomes
5.30 ± 0.01 Vdc.
5) Select page: 2, address: 0E, and read the data displayed on the
adjusting remote commander, and take this value as D
6) Set D
to page: D, address: 30, and press the PAUSE button of
30
the adjusting remote commander.
7) Convert D
to a decimal digit, and take this value as D
30
(Refer to the Hexadecimal-Decimal Conversion Table in "Data
Processing" in "Service Mode".)
8) Calculate the adjustment data (decimal) from the following
equations (decimal calculation), convert the data to hexadecimal
digits, and input to each adjustment addresses.
Address: 31
D
Address: 32
D
Address: 33
D
Address: 34
D
Address: 3F
D
Note: After setting the data, be sure to press the PAUSE button
of the adjusting remote commander.
9) Set data: 00 to page: 1, address: 00.
10) Turn off the power supply.
6-45
Camera recording
Arbitrary
LCD display of adjusting remote
commander
D
30, 31, 32, 33, 34, 3F
Fig. 6-3-5.
´ = D
´ + 7
31
30
´ = D
´ + 37
32
30
´ = D
´ + 53
33
30
´ = D
´ + 60
34
30
´ = D
´
3F
30
.
30
´.
30

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