Y Fm Deviation Adjustment (Note) - Sony Handycam CCD-TR86 Service Manual

3-12. Y FM DEVIATION ADJUSTMENT (NOTE)

Purpose :
Adjusts the FM signal to be recorded on tape
to the 8mm format. (Adjusts the frequency
deviation of normal mode Y FM signal.)
Adjustment error : Too bright or too dark overall picture.
Overmodulation picture. (If deviation is too
wide, or too narrow.)
Mode CAM-REC and playback
Signal Color bar chart
Measurement Point • VIDEO output terminal
(terminated in 75Ω)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 2F
A=(Vo × 0.96)Vp-p ± 2%
Specification Value
Note : The "Emphasis input level adjustment", "PB Y level
adjustment", must have already been completed.
Adjustment procedure:
Order Page Address
1
2 6 00
3 6 01
4 6 01
5
6
7
8 F 2F
9
10
11 6 01
12 6 00
Related Adjustments:
"Normal mode Y FM deviation adjustment"
Data
Insert a normal MP type tape.
01 After setting the data, press the PAUSE button. (Preparation)
Read the data of page : 6, address : 01, and record it.
47 After setting the data, press the PAUSE button.
Shoot and record the color bar chart. The video out level at that setup is "Vo".
Playback the recorded signal.
Compare the playback signal level (A) with the specification value. If the specification
value is satisfied, the adjustment is complete.
If the specification value is satisfied, change data using PLAY and STOP buttons.
• If the playback signal level is bigger than the specification value, decrease the data.
• If the playback signal level is smaller than the specification value, increase the data.
Press the PAUSE button.
Return to step 4.
Set the data which is recorded is step 3 to this address and, press the PAUSE button.
00 After setting the data, press the PAUSE button. (End)
Procedure
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