Sony Handycam DCR-PC10, Service Manual

Page: 100 / 181

5-23
1-3-2. VCO Adjustment (VF-117 Board)
Purpose: To make the TG frequency constant
(amplitude).
Adjustment error:
VF picture will lose sync when error is large.
Mode VTR stop
Signal No signal
Measurement Point VC-199 board CN6202 pin
!§
(EVF CHECK1)
Measuring Equipment Oscilloscope (DC range)
Adjustment Page D
Adjustment Address 76
Specification Value A=1.80 ± 0.05V
Adjustment procedure:
1-3-3. BRIGHT Adjustment (VF-117 Board)
Purpose:
Adjust brightness of EVF screen (appearance).
Adjustment error: The EVF picture will be close to saturated
picture (white washing) or black compression.
Mode VTR stop
Signal Absolutely black signal
Measurement Point CN6202 pin
!ª
(EVF VG) on
VC-199 board
Measuring Equipment Oscilloscope
Adjustment Page D
Adjustment Address 7A
Specification A=7.1 ± 0.1Vp-p
Connection:
1)
Connect CN6202 pin
!ª
and pin
1
(EVF GND) using a 680
Ω
resistor (1-249-415-11).
Adjustment Procedure:
Related adjustment items:
“CONTRAST Adjustment”
Order Page Address Data Procedure
1 0 01 01 Set the data. (Preparation)
2 Check the GND level on an oscilloscope in DC mode.
3 D 76 Change the data until the VCO voltage (A) becomes the specification value.
4 Press the PAUSE button.
5 0 01 00 Set the data. (End)
VCO
GND level
(0Vdc)
A
Fig. 5-1-14
Order Page Address Data Procedure
1 2 11 04 Set the data.
2 2 10 03 Set the data.
3 0 01 01 Set the data. (Preparation)
4 D 7A Change the data until the voltage difference (A) between the inverted waveform's pedestal
and the non-inverted waveform's pedestal satisfies the specification.
5 Press the PAUSE button.
6 2 10 00 Set the data.
7 2 11 00 Set the data.
8 0 01 00 Set the data. (End)
9 Check that the specified value of “CONTRAST Adjustment” is satisfied, if not, perform
“CONTRAST Adjustment”.
A
2H
Pedestal level
Pedestal level
Fig. 5-1-15