Video System Adjustments; Mhz Origin Oscillation Adjustment (Vc-195 Board); Afc F0 Adjustment (Vc-195 Board) - Sony Handycam Vision CCD-TRV300E Service Manual

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. REC Y current adjustment
8. REC L level adjustment
9. 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 VTR stop
Signal No signal
Pin ^§ of IC202 or pin !™ of IC501
Measurement Point
Measuring Instrument Frequency counter
Adjustment Page F
Adjustment Address 2C
Pin ^§ of IC202:
Specified Value
f=4433618.75±17Hz
Pin !™ of IC501:
f=14187500±55Hz
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.

2. AFC f0 Adjustment (VC-195 board)

Adjust the pull-in range of the A/D converted clock generator during
playback.
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: 4D, and press the PAUSE
button of the adjusting remote commander.
3) Select page: F, address: 4A, change the data and set the DC
voltage (A) to the specified value.
4) Press the PAUSE button of the adjusting remote commander.
5) 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.
5-43
VTR stop
No signal
Pin 4 of CN910 (AFC f0)
Digital voltmeter
F
4A
A = 2.10±0.05Vdc