Ntsc Lp Mode Switching Position Adjustment (Vc-195 Board) (Ccd-Tr917/Tr940/Tr940Pk); Video System Adjustments; 28 Mhz Origin Oscillation Adjustment; (Vc-195 Board) - Sony Handycam CCD-TR57 Service Manual

3. NTSC LP mode Switching Position Adjustment

(VC-195 Board)

(CCD-TR917/ TR940/ TR940PK)
If deviated in this case causes switching noise or jitter on the LP
mode played back screen.
Mode Playback
Signal Alignment tape:
For tracking adjustment
(WR5-1NP (NTSC))
CH1: Pin !¡ of CN910 (RF SWP)
Measurement Point
CH2: Pin 6 of CN910 (PB RF)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 7E, 7F
Specified Value t1 = 0±10µsec
Adjusting Method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: F, address: 2A, set data: 60, and then press the
PAUSE button of the adjustment remote commander.
3) Select page: F, address: 7E, change the data and minimize "t1",
and then press the PAUSE button of the adjustment remote
commander. (Coarse adjustment)
4) Select page: F, address: 7F, change the data and adjust so that
the switching position (t1) becomes the specified value. (Fine
adjustment)
5) Select page: F, address: 2A, set data: 00, and then press the
PAUSE button of the adjustment remote commander.
6) Press the PAUSE button of the adjustment remote commander.
7) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-7.
3-4.

VIDEO SYSTEM ADJUSTMENTS

Video system adjustments must be performed in the following order.
[Adjusting Order]
1. 28MHz origin oscillation adjustment
2. AFC f0 adjustment
3. Filter f0 adjustment
4. Y OUT level adjustment
5. C OUT level adjustment
6. RP filter f0 adjustment
7. Hi8 REC Y current adjustment
8. Standard REC Y current adjustment
9. Hi8 REC L level adjustment
10. Standard8 REC L level adjustment
11. REC C current adjustment
1. 28 MHz Origin Oscillation Adjustment (VC-195 board)
Set the frequency of the clock for synchronization.
If deviated, the synchronization will be disrupted and the color will
become inconsistent.
Mode
Signal
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: 3, address: 01, set data: 41, and press the PAUSE
button of the adjusting remote commander.
3) Select page: 2, address: 61, and set data: 30.
4) Select page: F, address: 2C, change the data and set the clock
frequency(f) to the specified value.
5) Press the PAUSE button of the adjusting remote commander.
6) Select page: 2, address: 61, and set data: 10.
7) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
6) Select page: 0, address: 01, and set data: 00.
5-38
VTR stop
No signal
Pin ^§ of IC202 or pin !™ of IC501
Frequency counter
F
2C
Pin ^§ of IC202 :
f=3579545±17Hz
Pin !™ of IC501 :
f=14318181±68Hz