Video System Adjustments - Sony DCR-TRV240 Service Manual

3-4.

VIDEO SYSTEM ADJUSTMENTS

Note: Before performing the adjustments, check the data of page: 0,
address: 10 is "00". If not, set data: 00 to this address.
1. 27MHz Origin Oscillation Adjustment
(VC-276 board)
Set the frequency of the clock for synchronization.
If deviated, the synchronization will be disrupted and the color will
become inconsistent.
Mode VTR stop
Signal Not required
Measurement Point Pin qh of IC1502
Measuring Instrument Frequency counter
Adjustment Page F
Adjustment Address 12
Specified Value f = 13500000 ± 68Hz
Note: The data of page: 0, address: 10 must be "00".
Adjusting method:
Order Page Address Data
1 0 01 01
2 F 12
3 F 12
4 0 01 00
VC-276 board
24 13
25 12
36 1
37 48
Procedure
Set the data.
Change the data and set the
frequency (f) to the specified
value.
Press PAUSE button.
Set the data.
IC1502
2. S VIDEO OUT Y Level Adjustment (VC-276 board)
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note1: The data of page: 0, address: 10 must be "00".
Adjusting method:
Order Page Address Data
1 0 01
2 <D> <FE>
[A] [12]
3
4
5
6 3 0C
7 C 25
8 C 25
9 3 0C
10 <D> <FE>
[A] [12]
11 0 01
12
Note2: < >: DCR-TRV240, [ ]: DCR-TRV340
5-47
DCR-TRV240/TRV340
VTR stop
No signal
Y signal terminal of S VIDEO jack
(75Ω terminated)
Oscilloscope
C
25
A = 1000 ± 20mV
Procedure
01 Set the data.
10 Set the data, and press PAUSE
button. (Note2)
Set the HOLD switch to OFF.
Set the POWER switch to OFF,
then set to VCR again.
Set the HOLD switch to ON.
02 Set the data, and press PAUSE
button.
Change the data and set the Y
signal level (A) to the specified
value.
Press PAUSE button.
00 Set the data, and press PAUSE
button.
00 Set the data, and press PAUSE
button. (Note2)
00 Set the data.
Turn off the power and turn on
again.
Center of luminance line
H
Fig. 5-3-7.
A