66 Mhz/54 Mhz Origin Oscillation Adjustment; Video System Adjustments - Sony BRC-300 Service Manual
3ccd color video camera / optical multiplex unit
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- Command list (23 pages) ,
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3-2. BRC-300/300P Camera Block Electrical Alignment
3-2-8. 66 MHz/54 MHz Origin Oscillation
Adjustment
Set the frequency of the clock for synchronization.
If the following specified value is not satisfied, the syn-
chronization will be disrupted and the color will become
inconsistent.
Subject
Arbitrary
Measurement point
VC-343 board, pin 6 of IC503
Measuring instrument
Frequency counter (through the
oscilloscope)
Adjustment page
F
Adjustment address
10
f = 33000000 ± 165 Hz (NTSC)
Specification
f = 27000000 ± 135 Hz (PAL)
m
. The data of page: 0, address: 10 must be "00".
. Connect the equipments as shown in the figure.
. Terminate the probe of the oscilloscope with 75 Z.
Probe
75 Z terminator
Oscilloscope
Adjusting procedure
Order Page Address Data Procedure
1
0
01
01
2
F
10
3
F
10
4
0
01
00
IC503
32
17
33
16
48
1
49
64
VC-343 board
3-20
Frequency counter
Set the data.
Change the data to satisfy the
specification f.
Press PAUSE button.
Set the data.
3-2-9. Video System Adjustments
m
. Perform this adjustments after performing "3-2-8. 66
MHz/54 MHz Origin Oscillation Adjustment".
. Check that the data of page: 0, address: 10 is "00". If
not, set data: 00 to this address.
. Terminate the probe of the oscilloscope with 75 Z.
Y Output Level Adjustment
Mode
Camera
Subject
Arbitrary
Measurement point
DD-208 board, pin 6 of CN151
(75 Z terminated)
Measuring instrument Oscilloscope
Adjustment page
C
Adjustment address
25
Y output level: A = 1000 ± 14 mV
Specification
Adjusting procedure
Order Page Address Data Procedure
1
0
01
01
2
3
0C
02
3
C
25
4
C
25
5
3
0C
00
6
0
01
00
Center of luminance line
H
Set the data.
Set the data, and press
PAUSE button.
Change the data to satisfy the
specification A.
Press PAUSE button.
Set the data, and press
PAUSE button.
Set the data.
BRC-300/300P
BRU-300/300P
A
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