Video System Adjustments; Base Band Block Adjustments; Chroma Bpf F Adjustment (Vc-227 Board); S Video Out Y Level Adjustment (Vc-227 Board) - Sony DCR-PC100 Service Manual

3-4.

VIDEO SYSTEM ADJUSTMENTS

Before perform the video system adjustments, check that the
specified value of "54MHz/66MHz Origin Oscillation Adjustment"
of "CAMERA SYSTEM ADJUSTMENT" is satisfied.
Note: The lens block (CD-234 board) must be connected when performing
the adjustments.
3-4-1.

Base Band Block Adjustments

1. Chroma BPF f Adjustment (VC-227 Board)
0
Set the center frequency of IC1402 chroma band-pass filter.
Mode Camera
Subject All black
(Cover the lens with the lens cap)
Measurement Point CH1: Chroma signal terminal of
CH2: Y signal terminal of S VIDEO
Measuring Instrument Oscilloscope
Adjustment Page C
Adjustment Address 2B
Specified Value A = 100mVp-p or less
B = 200mVp-p or more
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: C, address: 51, set data: 73, and press the PAUSE
button of the adjustment remote commander.
3) Check that the burst signal (B) is output to the chroma signal
terminal of S VIDEO jack.
4) Select page: 3, address: 0C, set data: 04, and press the PAUSE
button.
5) 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".)
6) Press the PAUSE button.
7) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
8) Check that the burst signal level (B) satisfies the specified value.
9) Select page: C, address: 51, set data: 03, and press the PAUSE
button.
10) Select page: 0, address: 01, and set data: 00.
When the data of page: 3, address: 0C, is 04:
A
CH1
CH2
When the data of page: 3, address: 0C, is 00:
CH1
Fig. 5-3-7.
S VIDEO jack (75Ω terminated)
jack (75Ω terminated)
H
H

2. S VIDEO OUT Y Level Adjustment (VC-227 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 noting 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.
6) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
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.
B
5-48
Camera
Arbitrary
Y signal terminal of S VIDEO jack
(75Ω terminated)
Oscilloscope
C
25
A = 1000 ± 14mV
Center of luminance line
H
Fig. 5-3-8.
A