Video System Adjustments; Base Band Block Adjustments; Chroma Bpf Fo Adjustment (Vc-217 Board); S Video Out Y Level Adjustment (Vc-217 Board) - Sony DCR-TRV8 Service Manual

3-4. VIDEO SYSTEM ADJUSTMENTS

Before perform the video system adjustments, check that the
specified value of "36 MHz Origin Oscillation Adjustment" of
"CAMERA SYSTEM ADJUSTMENT" is satisfied.

3-4-1. Base Band Block Adjustments

1. Chroma BPF fo Adjustment (VC-217 board)

Set the center frequency of IC1402 chroma band-pass filter.
Mode VTR stop
Signal No signal
Measurement Point CH1: Chroma signal terminal of
S VIDEO jack (75
CH2: Y signal terminal of S VIDEO
jack (75
Measuring Instrument Oscilloscope
Adjustment Page C
Adjustment Address 2B
Specified Value A = 100mVp-p or less
B = 200mVp-p or more
Switch setting:
DISPLAY (Menu display) ............................ V-OUT/LCD
DISPLAY (CK-84 board) ............................................ ON
Adjusting method:
1) Check that the burst signal (B) is output to the chroma signal
terminal of S VIDEO jack.
2) Select page: 0, address: 01, and set data: 01.
3) Select page: 3, address: 0C, set data: 04, and press the PAUSE
button of the adjustment remote commander.
4) Select page: C, address: 2B, and change the data for minimum
amplitude of the burst signal level (A).
(The data of address: 2B, should be "00" to "07".)
5) Press the PAUSE button of the adjustment remote commander.
6) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button of the adjustment remote commander.
6) Check that the burst signal level (B) is satisfied the specified
value.
7) Select page: 0, address: 01, and set data: 00.
When the data pf page: 3, address: 0C, is 04:
A
CH1
CH2
Fig. 5-3-5.
When the data pf page: 3, address: 0C, is 04:
CH1
Fig. 5-3-6.
terminated)
terminated)
H
B
H

2. S VIDEO OUT Y Level Adjustment (VC-217 board)

Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 35. After note down the data of this
address, set data: 01 to the address.
3) Select page: 3, address: 0C, set data: 02, and press the PAUSE
button of the adjustment remote commander.
4) Select page: C, address: 25, change the data and set the Y signal
level (A) to the specified value.
5) Press the PAUSE button of the adjustment remote commander.
6) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button of the adjustment remote commander.
7) Select page: 2, address: 35. and set the data that is noted down
at step 2).
8) Select page: 0, address: 01, and set data: 00.
5-44
Camera
Arbitrary
Y signal terminal of S VIDEO jack
(75 terminated)
Oscilloscope
C
25
A = 1000 ± 14mV
Center of luminance line
H
Fig. 5-3-7.
A