Rec C/Afm Current Adjustment; Preparations; Rec C Current Check (Vc-272 Board) - Sony Handycam Vision CCD-TRV107E Service Manual

6. REC C/AFM Current Adjustment

6-1. Preparations

Order Page Address Data
1 0 01 01
2 D 14
3 D 14 26
4 D 15
5 D 15 6F
Note: Don't disconnect the DC power supply of the camcorder during the
following adjustments.
When the following symptom occurs, reset the data of D page to the
values written down.
1) The power is shut off so that unit cannot operate.
Procedure
Set the data.
Write down the data.
Set the data, and press PAUSE
button.
Write down the data.
Set the data, and press PAUSE
button.
CCD-TRV107E/TRV108E/TRV208E/TRV408E

6-2. REC C Current Check (VC-272 board)

Check the recording current level of the REC Chroma signal. If it is
too low, chroma signal noise in played back picture will be increased.
If too high, Y signal noises will increase and white modulation noises
will be produced.
Mode
Signal
Measurement Point
Measuring Instrument
Specified Value
Note1: Insert a plug into the S VIDEO or the A/V jack.
Adjusting method:
Order Page Address Data
1
2 0 01
3 2 01
4 6 61
5 E 9F
6 E 9F
7 F 69
8 F 69
9
10 F 69
11 E 9F
12 6 61
13 2 01
14 0 01
15
Note2: Use the REC buttons of the adjustment remote commander (with
the HOLD switch set in the OFF position).
A
5-37
VTR recording (SP mode)
No signal
REC RF (Pin 7 of CN713)
Oscilloscope
(20 MHz BW LIMIT: OFF)
A = 54.0 ± 3.0mV
Procedure
Insert a tape, and set to VTR
recording mode. (Note2)
01 Set the data.
41 Set the data, and press PAUSE
button.
30 Set the data.
Write down the data.
05 Set the data, and press PAUSE
button.
Write down the data.
00 Set the data, and press PAUSE
button.
Check that the REC chroma signal
level (A) satisfies the specified
value, and write down the signal
level.
Set the data written down at step
7, and press PAUSE button.
Set the data written down at step
5, and press PAUSE button.
10 Set the data.
00 Set the data, and press PAUSE
button.
00 Set the data.
Perform "REC AFM Current
Adjustment" and "Processing after
completed adjustment".
Center of the luminance line width
1.35 µ sec
Fig. 5-3-9.