Video System Adjustments; 28 Mhz Origin Oscillation Adjustment; (Vc-341 Board); Afc F Adjustment (Vc-341 Board) - Sony CCD-TRV138 Manual

3-4.

VIDEO SYSTEM ADJUSTMENTS

Before perform the video system adjustments, check that the data
of page: 0, address: 10 is "00".
If not, select page: 0, address: 10, and set the data "00".
Video system adjustments must be performed in the following or-
der.
Adjusting procedure:

1. 28 MHz origin oscillation adjustment

2. AFC f adjustment
0
3. LINE OUT level adjustment
4. REC Y current adjustment
5. REC C/AFM current adjustment
1. 28 MHz Origin Oscillation Adjustment

(VC-341 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 (PLAY/EDIT mode)
Signal No signal
Measurement Point Pin qa of IC151
Measuring Instrument Frequency counter
Adjustment Page F
Adjustment Address 10
f = 14318181 ± 68 Hz (NTSC model)
Specified value
f = 14187500 ± 54 Hz (PAL model)
Note 1: Check that the data of page: 0, address: 10 is "00".
Note 2: Refer to "2. DISASSEMBLY", when opening the VC-
341 board.
Adjusting method:
Order Page Address Data
1 0 01 01
2 F 10
3 F 10
4 0 01 00
VC-341 BOARD (SIDE B)
Measurement
Point
Fig. 6-3-4
CCD-TRV138/TRV238E/TRV338/TRV438E
Procedure
Change the data and set the
frequency (f) to the specified
value.
Press PAUSE button.
12 11 1
13 48
24 37
25 36
IC151
2. AFC f Adjustment (VC-341 Board)
0
Adjust the pull-in range of A/D converted clock generator during
playback.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified value
Note 1: Check that the data of page: 0, address: 10 is "00".
Adjusting method:
Order Page Address Data
1
2 0 01
3 3 01
4 3 02
5 3 03
6 0 01
Note 2: If the data is other than"00", adjustment has errors.
6-30
RadarW RadarW RadarW
VTR stop (PLAY/EDIT mode)
No signal
Displayed data of page: 3, address: 03
Adjusting remote commander
C
19
The data of page: 3, address: 03 is "00"
Procedure
Close the cassette compartment
without inserting cassette.
01
82 Press PAUSE button.
Check the data changes to
"00".
Check that the data is "00".
(Note 2)
00