Decoder Free Run Adjustment (Vd-032 Board); Decoder Hue Adjustment (Vd-032 Board) - Sony DSR-25 Service Manual

DSR-25

3. Decoder Free Run Adjustment (VD-032 Board)

Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note1: Set "S VIDEO" mode with INPUT SELECT switch.
Nothing should be connected to VIDEO INPUT pin.
Note2: Connection of equipment
DSR-25
S VIDEO OUTPUT C
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 9, address: 06, set data: 20, and press the PAUSE
button.
3) Select page: E, address: A9 (NTSC mode) or 91 (PAL mode),
change the data and adjust the decoder free run frequency (f)
to the specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 9, address: 06, set data: 00, and press the PAUSE
button.
6) Select page: 0, address: 01, and set data: 00.
For NTSC model
R
Y
L
Burst
G
E-E
Color bar (burst signal and chroma
signal OFF)
(S VIDEO input) (Note1)
S VIDEO OUTPUT C terminal
Oscilloscope
Frequency counter (Note2)
E
A9 (NTSC)
91 (PAL)
f = 3579545 ± 20 Hz (NTSC)
f = 4433618 ± 20 Hz (PAL)
Frequency
Oscilloscope
counter
M
G
B
C
Y

4. Decoder HUE Adjustment (VD-032 Board)

Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note 1: Set "S VIDEO" mode with INPUT SELECT switch.
Note 2: Adjusting level is performed in "VIDEO E-E level ad-
justment".
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Adjust the burst luminance point to the specified position us-
ing the PHASE and GAIN knobs of vectorscope.
3) Change the data on page: C, address: AA (NTSC mode) or BE
(PAL mode) and adjust so that a blue luminance point posi-
tions at the mark on the vectorscope. At this time, make
sure that each luminance point satisfies the specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 0, address: 01, and set data: 00.
For PAL model
–G
Y
L
–Y
L
–Burst
G
Fig. 5-3-10
5-58
E-E
Color bar (NTSC: with 7.5% setup)
(S VIDEO input) (Note 1)
VIDEO OUTPUT terminal
(75 Ω terminated)
Vectorscope (NTSC: 7.5% setup
mode)
C
AA (NTSC)
BE (PAL)
From the center of mark on the
vectorscope, each luminance point
must satisfy the following: (Note 2)
Level: ± 5%
Phase: ± 3º
R
–C
Y
M
G
Burst
–M
G
C
–R
Y
–B
B