Vco Adjustment (Vf-117 Board); Bright Adjustment (Vf-117 Board) - Sony DCR-PC10 Service Manual

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
VC-199 board CN6202 pin !§
Measurement Point
(EVF CHECK1)
Measuring Equipment Oscilloscope (DC range)
Adjustment Page D
Adjustment Address 76
Specification Value A=1.80 ± 0.05V
Adjustment procedure:
Order Page Address
1 0 01
2
3 D 76
4
5 0 01
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
CN6202 pin !ª (EVF VG) on
Measurement Point
VC-199 board
Measuring Equipment Oscilloscope
Adjustment Page D
Adjustment Address 7A
Specification A=7.1 ± 0.1Vp-p
Connection:
Connect CN6202 pin !ª and pin 1 (EVF GND) using a 680
1)
resistor (1-249-415-11).
Adjustment Procedure:
Order Page Address
1 2 11
2 2 10
3 0 01
4 D 7A
5
6 2 10
7 2 11
8 0 01
9
Related adjustment items:
"CONTRAST Adjustment"
Data
01 Set the data. (Preparation)
Check the GND level on an oscilloscope in DC mode.
Change the data until the VCO voltage (A) becomes the specification value.
Press the PAUSE button.
00 Set the data. (End)
Data
04 Set the data.
03 Set the data.
01 Set the data. (Preparation)
Change the data until the voltage difference (A) between the inverted waveform's pedestal
and the non-inverted waveform's pedestal satisfies the specification.
Press the PAUSE button.
00 Set the data.
00 Set the data.
00 Set the data. (End)
Check that the specified value of "CONTRAST Adjustment" is satisfied, if not, perform
"CONTRAST Adjustment".
Procedure
Pedestal level
Procedure
5-23
VCO
A
GND level
(0Vdc)
Fig. 5-1-14
Pedestal level
2H
Fig. 5-1-15
A