Vco Adjustment (Vf-115 Board); Bright Adjustment (Vf-115 Board) - Sony DCR-TRV7 Service Manual

2. VCO Adjustment (VF-115 Board)

Set the VCO freerun frequency. If deviated, the EVF screen will be
blurred.
Mode Camera
Subject Arbitrary
Pin !¡ of CN9928 (VCO) on CB-58
Measurement point
board
Measuring instrument Oscilloscope (DC range)
D
Adjustment page
Adjustment address 76
Specified value A = 1.8 ± 0.05Vdc
Adjusting method:
1) Set data: 01 to page: 0, address: 01.
2) Check the GND level of the oscilloscope.
3) Change the data of page: D, address: 4F, and set the PCO output
voltage (A) to the specified value.
4) Press the PAUSE button of the adjusting remote commander.
5) Set data: 00 to page: 0, address: 01.
H
Fig. 5-1-12.
A
GND level
(0 Vdc)

3. Bright Adjustment (VF-115 Board)

Set the level of the VIDEO signal for driving the LCD to the specified
value. If deviated, the screen image will be blackish or saturated
(whitish).
Mode
Subject
Measurement point
Measuring instrument
Adjustment page
Adjustment address
Specified value
Connection:
1) Connect Pin !ª and Pin !¶ (GND) of CN9928 with a
3.3 kΩ resistor.
3.3 kΩ resistor: 1-249-423-11
Adjusting method:
1) Set data: 01 to page: 0, address: 01.
2) Input the following data to page: D, address: 88 to 8D.
Note: To write in the non-volatile memory (EEPROM), press
the PAUSE button of the adjusting remote commander
each time to set the data.
3) Change the data of page: D, address: 7A, and set the voltage (A)
Address 88
Data 00
between the reversed waveform pedestal and non-reversed
waveform pedestal to the specified value.
4) Press the PAUSE button of the adjusting remote commander.
5) Input the following data to page: D, address: 88 to 8D.
Note: To write in the non-volatile memory (EEPROM), press
the PAUSE button of the adjusting remote commander
each time to set the data.
6) Set data: 00 to page: 0, address: 01.
Address 88
Data 38
5–21
Camera
Arbitrary
Pin !ª of CN9928 (EVF VG) on
CB-58 board
Oscilloscope
D
7A
A = 7.0 ± 0.1 V
89 8A 8B 8C
00 00 00 00
89 8A 8B 8C
00 20 20 02
A
2H
Fig. 5-1-13.
8D
00
8D
00