Emphasis Input Level Adjustment - Sony CCD-TRV32 Service Manual

3-12. EMPHASIS INPUT LEVEL ADJUSTMENT

Purpose : Adjusts the record emphasis characteristics to
the specification value.
Adjustment error : Luminance signal smear, blurred picture, too
much emphasized edge of overall video
characteristics.
Mode CAM-REC
Signal Color bar chart
• CN102 Pin 4
Measurement Point
• VIDEO output terminal
(terminated in 75Ω)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 31
A=(Vo × 0.96 × 500) mVp-p ± 2%
Specification Value
Adjustment procedure:
Order Page Address
1 6 00
2 6 01
3 6 01
4
5 F 31
6
7 6 01
8 6 00
H
Data
01 After setting the data, press the PAUSE button. (Preparation)
Read the data of page : 6, address : 01, and record it.
47 After setting the data, press the PAUSE button.
Measure amplitude of the VIDEO OUT. The measured value is "Vo"[V].
Change data using PLAY and STOP buttons so that the Y signal level at CN102 pin4
(A) satisfies the specification.
Press the PAUSE button.
Set the data which is recorded in step 2 to this address and, press the PAUSE button.
00 After setting the data, press the PAUSE button. (End)
White (100%)
Procedure
A
6-70